[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Christian Ehrhardt]

Thanks for the report,
we need to add that indeed the moment we have something reliable by upstream
I've added the upstream bug tracker https://gitlab.com/qemu-project/qemu/-/issues/3065

Implementation looks like being worked on since
https://mail.gnu.org/archive/html/qemu-devel/2025-08/msg04984.html

With iterations on feedback and fixes like
https://mail.gnu.org/archive/html/qemu-devel/2025-10/msg08521.html
https://mail.gnu.org/archive/html/qemu-devel/2025-11/msg00043.html

Recently got some more attention by us and Fedora picking up and seeing the same
https://mail.gnu.org/archive/html/qemu-devel/2025-12/msg00468.html

@Heinrich
do you think we need to rush glossing over it by using the incomplete versions in resolute until the final one is out. No risc there yet, but this isn't exclusive to risc - that is just more common to run emulated.
Or can we wait until they have it finalized (either way before resolute release we should have it in R but also in SRU that we expect to run resolute binaries.

** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #3065
   https://gitlab.com/qemu-project/qemu/-/issues/3065

** Also affects: qemu via
   https://gitlab.com/qemu-project/qemu/-/issues/3065
   Importance: Unknown
       Status: Unknown

** Also affects: qemu (Ubuntu Noble)
   Importance: Undecided
       Status: New

** Also affects: qemu (Ubuntu Resolute)
   Importance: High
       Status: Confirmed

** Also affects: qemu (Ubuntu Jammy)
   Importance: Undecided
       Status: New

** Also affects: qemu (Ubuntu Plucky)
   Importance: Undecided
       Status: New

** Also affects: qemu (Ubuntu Questing)
   Importance: Undecided
       Status: New

** Changed in: qemu (Ubuntu Questing)
       Status: New => Confirmed

** Changed in: qemu (Ubuntu Plucky)
       Status: New => Confirmed

** Changed in: qemu (Ubuntu Noble)
       Status: New => Confirmed

** Changed in: qemu (Ubuntu Jammy)
       Status: New => Confirmed

** Changed in: qemu (Ubuntu Questing)
   Importance: Undecided => Medium

** Changed in: qemu (Ubuntu Plucky)
   Importance: Undecided => Medium

** Changed in: qemu (Ubuntu Noble)
   Importance: Undecided => High

** Changed in: qemu (Ubuntu Jammy)
   Importance: Undecided => Low

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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  Unknown
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Confirmed
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Bug Watch Updater]

** Changed in: qemu
       Status: Unknown => New

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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  New
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Confirmed
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Heinrich Schuchardt]

There are two patches with the same title "[PATCH 1/7] Add termios2
support to linux-user"

https://lore.kernel.org/qemu-
devel/745f18b6-ee62-4903-9a56-dcb903b610cf@bonslack.org/ contains an
updated version. It adds copying c_ispeed, c_ospeed. These are the
fields that struct termios2 has on top of what is in struct termios.

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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  New
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Confirmed
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Heinrich Schuchardt]

@Christian

The patch "[PATCH 1/7] Add termios2 support to linux-user" looks good to
me. Except for the extra two fields in struct termios2 it follows what
is done for struct termios.

I added the patch on top of origin/master and it resolves the issue both
on arm64 and on riscv64.

Once
https://code.launchpad.net/~slyon/ubuntu/+source/qemu/+git/qemu/+merge/496788
is accepted, we should go ahead with this patch.

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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  New
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Confirmed
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Heinrich Schuchardt]

Unfortunately the series was sent without an In-Reply-To header. The
other patches can be found with at

https://lore.kernel.org/qemu-
devel/?q=Luca+Bonissi+%3Cqemu%40bonslack.org%3E

These extra patches seem to be needed for target architectures like PPC
and MIPS that don't use generic/termbits.h. S390X should be good as it
uses generic/termbits.h.

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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  New
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Confirmed
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Heinrich Schuchardt]

** Changed in: qemu (Ubuntu Noble)
    Milestone: None => ubuntu-24.04.4

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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  New
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Confirmed
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Utkarsh Gupta]

Ubuntu 25.04 (Plucky Puffin) has reached end of life, so this bug will
not be fixed for that specific release.

** Changed in: qemu (Ubuntu Plucky)
       Status: Confirmed => Won't Fix

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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  New
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Won't Fix
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Christian Ehrhardt]

Sadly that has not yet fully concluded by now, patches got sent in
https://mail.gnu.org/archive/html/qemu-devel/2026-01/msg00129.html but
not yet fully merged. We need to re-check what we could merge along 10.2
in the next few days.

Or we merge 10.2 but add this as a test fix later but before 26.04 comes out.
That is ok for 26.04, but further delays the SRU of the same to older releases which can affect running the new release there :-/

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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  New
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Won't Fix
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Bug Watch Updater]

** Changed in: qemu
       Status: New => Fix Released

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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  Fix Released
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Won't Fix
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Christian Ehrhardt]

** Changed in: qemu (Ubuntu Resolute)
     Assignee: (unassigned) => Hector CAO (hectorcao)

** Tags added: server-todo

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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  Fix Released
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Won't Fix
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Michael Tokarev]

fwiw, I've picked up termios2 to the current qemu stable series, to be
released in a couple days.  10.0, 10.1 and 10.2 will have it.

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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  Fix Released
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Won't Fix
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Christian Ehrhardt]

Awesome, that will make the backport along the merge no effort at all -
thanks Michael!

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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  Fix Released
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Won't Fix
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Christian Ehrhardt]

@mjt - Ideally we'd pick up those and all else you queued up so far, but
I do not see those pushed to upstream/stable-10.2 yet, can we find them
anywhere already?

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https://bugs.launchpad.net/bugs/2133804

Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  Fix Released
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Won't Fix
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Hector CAO]

The patchset has been merged in qemu upstream :
https://gitlab.com/qemu-project/qemu/-/commit/fea2d7a784fc3627a8aa72875f51fe7634b04b81

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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  Fix Released
Status in qemu package in Ubuntu:
  Confirmed
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Won't Fix
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Confirmed

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Hector CAO]

** Merge proposal linked:
   https://code.launchpad.net/~hectorcao/ubuntu/+source/qemu/+git/qemu/+merge/498837

** Changed in: qemu (Ubuntu Resolute)
       Status: Confirmed => In Progress

-- 
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/2133804

Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  Fix Released
Status in qemu package in Ubuntu:
  In Progress
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Won't Fix
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  In Progress

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Michael Tokarev]

FWIW, for the upstream stable qemu series, the forkflow is as follows.

First, stable-N.M branches are only updated when a next stable release
is made (in this case, v10.2.1) - at the same time, I push a tag and we
publish new tarballs on download.qemu.org, and I send announces.
stable-N.M branches are static, only receiving new commits, once a
commit is there, it's cast in stone.

Before a stable release, it is staging-N.M branch, - which is a volatile
branch, which can be overridden, reordered, etc, as the work progresses.

And even before staging-N.M, I usually push to my repository on gitlab
first, https://gitlab.com/mjt0k/qemu - this is because there, I can
avoid thinking about gitlab CI credits, clashing CI pipelines with the
staging/master branches, etc.

So, expecting stuff to show up on stable-N.M branches isn't wise before
the next stable release.

HTH

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You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/2133804

Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  Fix Released
Status in qemu package in Ubuntu:
  In Progress
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Won't Fix
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  In Progress

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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[Bug 2133804] Re: QEMU does not emulate IOCTL TCGETS2

[Launchpad Bug Tracker]

This bug was fixed in the package qemu - 1:10.2.1+ds-1ubuntu1

---------------
qemu (1:10.2.1+ds-1ubuntu1) resolute; urgency=medium

  * Merge with Debian unstable (LP: #2131929):
    Among several other backported fixes this will resolve
    - qemu-system-any brings in random system emulator with the
      new APT solver (LP: #2127053)
    - add termios2 support (LP: #2133804)
    Remaining changes:
    - qemu-kvm to systemd unit
      - d/qemu-kvm-init: script for QEMU KVM preparation modules, ksm,
        hugepages and architecture specifics
      - d/qemu-system-common.qemu-kvm.service: systemd unit to call
        qemu-kvm-init
      - d/qemu-system-common.install: install helper script
      - d/qemu-system-common.qemu-kvm.default: defaults for
        /etc/default/qemu-kvm
      - d/rules: call dh_installinit and dh_installsystemd for qemu-kvm
    - Distribution specific machine type
      (LP 1776189 1761372 1769053 2012763 2131822)
      - d/p/ubuntu/define-ubuntu-machine-types.patch: define distro machine
        types containing release versioned machine attributes
      - Add an info about -hpb machine type in debian/qemu-system-x86.NEWS
      - ubuntu-q35 alias added to auto-select the most recent q35 ubuntu type
    - Enable nesting by default
      - d/p/ubuntu/enable-svm-by-default.patch: Enable nested svm by default
        in qemu64 on amd
        [ No more strictly needed, but required for backward compatibility ]
    - tolerate ipxe size change on migrations to >=18.04 (LP 1713490)
      - d/p/ubuntu/pre-bionic-256k-ipxe-efi-roms.patch: old machine types
        reference 256k path
      - d/control-in: depend on ipxe-qemu-256k-compat-efi-roms to be able to
        handle incoming migrations from former releases.
    - d/qemu-block-extra.postinst: Use latest Ubuntu's QEMU
      package version when deciding whether to invoke
      'deb-systemd-helper purge'.
    - d/control-in: Disable B-D on qemu-system-data, due to that also
      - d/rules: Export DEB_BUILD_PROFILES with
        pkg.qemu.use-upstream-vdso when building on non-amd64 architectures.
      - d/control: Disable B-D on seabios.
      - d/rules: Disable upstream tests depending on qemu-system-data
    - d/control-in: B-D on multipath libs for multipath persist in
      qemu-pr-helper (LP 2117378)
    - d/control-in: breaks/replaces for dtb files moving qemu-system-misc
      to qemu-system-data
    - d/rules: Use upstream vDSO for architecture variant builds (LP 2131236)
  * Updated delta:
    - d/p/u/define-ubuntu-machine-types.patch: update to match 10.2
  * Dropped changes:
    - d/p/u/lp2121787/* : Fix migration issues because of missing features
      (LP 2121787)
      [Fixed in upstream 10.2]
    - d/p/u/lp-2123828-*: Fix RISC-V instructions endianness (LP 2123828)
      [Fixed in upstream 10.2]

qemu (1:10.2.1+ds-1) unstable; urgency=medium

  * new upstream stable/bugfix release
    (Closes: #1123670, CVE-2025-14876)
  * - fix-PIRQ-bounds-check-in-xen_physdev_map_pirq-CVE-2026-0665.patch
  * remove ipxe from FIRMWAREPATH (needs ipxe from trixie and up)

qemu (1:10.2.0+ds-2) unstable; urgency=medium

  * two patches to make statically-linked linux-user not depend on nss
    (remove linkage to qemu-sockets.c)
  * 1095935.patch (Closes: #1095935)
  * d/control: qemu-user: mention possibility to sym-link files in
    /usr/share/qemu/binfmt.d/ to /etc/binfmt.d/
  * d/rules: remove workaround for #1019011 for palcode-clipper -
    the bug in gcc has been fixed (in 2022)
  * d/control: better versioned dependencies of qemu modules: use
    qemu-system-common as a syncronisation point instead of qemu-system-any
    (Closes: LP#2127053)
  * d/control: finally de-couple qemu-system-riscv and qemu-system-s390x
    from qemu-system-misc (remove misc:Depends: riscv, s390x)
  * fix-PIRQ-bounds-check-in-xen_physdev_map_pirq-CVE-2026-0665.patch
    (Closes: #1125423, CVE-2026-0665)
  * d/copyright: fix Files/License sections

qemu (1:10.2.0+ds-1) unstable; urgency=medium

  * new upstream release
  * d/gbp.conf: switch to 10.2
  * d/patches: refresh
  * d/control.mk: checked-version: 10.2.0+ds, vdso-version: 1:10.2.0+ds-1~
  * d/copyright: rename u-boot-sam460ex bin following upstream change
  * d/copyright: add pc-bios/npcm[78]xx_bootrom.bin to Files-Excluded
  * d/rules: adjust for u-boot-sam460ex rename, work around build bug,
    provide a compat symlink for now
  * d/control.mk: 32bit mips and powerpc hosts are not supported anymore

qemu (1:10.1.3+ds-1) unstable; urgency=medium

  [ Michael Tokarev ]
  * new upstream stable/bugfix release 10.1.3
    Closes: #1119917, CVE-2025-12464 (buffer overflow in e1000_receive_iov)
    Closes: #1117153, CVE-2025-11234 (UAF in websocket handshake code)
  * d/qemu-user.postinst: add the forgotten `set -e'
  * d/rules: enable vnc-sasl and vnc password (through nettle)
    for xen build (Closes: #1041533)
  * remove patches applied upstream:
    - linux-user-use-correct-type-for-FIBMAP-and-FIGETBSZ.patch
    - tcg-arm-fix-tgen_deposit.patch

  [ Heinrich Schuchardt ]
  * d/rules: reword build-vdso comment

qemu (1:10.1.2+ds-3) unstable; urgency=medium

  * d/control: qemu-system-xen: add the forgotten ipxe-qemu dependency
    qemu-system binaries require pxe boot roms for the network adaptors.
    When splitting qemu-system-xen into its own package, this dependency
    has been forgotten initally, but has been enabled for bookworm (#1035676).
    However, this change were lost when uploading the next version of qemu
    aimed for trixie.  So trixie has this issue too, despite it's been fixed
    in bookworm already.  (Closes: #1035676, #1120146)

qemu (1:10.1.2+ds-2) unstable; urgency=medium

  * d/control: bump seabios dependency to 1.17.0 due to ESP fixes
  * linux-user-use-correct-type-for-FIBMAP-and-FIGETBSZ.patch
    (Closes: #1119257)

qemu (1:10.1.2+ds-1) unstable; urgency=medium

  * new upstream stable/bugfix release
    Closes: #1112285 (assertion failure in qemu-system-alpha)
    Fixes migration from 10.0 and earlier

qemu (1:10.1.1+ds-1) unstable; urgency=medium

  [ Michael Tokarev ]
  * new upstream stable/bugfix release
    Closes: #1082377, CVE-2024-8354
  * removed patches included upstream:
    - block-curl-fix-curl-internal-handles-handling.patch
    - e1000e-prevent-crash-from-legacy-interrupt-firing-af.patch
    - ui-spice-fix-crash-when-disabling-GL-scanout-on.patch
    - hw-vfio-user-add-x-pci-class-code.patch
  * d/control.mk: checked-version := 10.1.1+ds
  * d/control: add python3-distlib:native build-dep variant due to #1115197
  * aarch64-linux-user-no-pauth.patch: disable pauth on aarch64 linux-user
    by default (Closes: #1113951)

  [ Luca Boccassi ]
  * qemu-guest-agent: add ConditionVirtualization=vm
  * qemu-guest-agent: add Documentation= referring to manpages

 -- Hector Cao <hector.cao@canonical.com>  Tue, 17 Feb 2026 02:02:42
+0100

** Changed in: qemu (Ubuntu Resolute)
       Status: In Progress => Fix Released

** CVE added: https://cve.org/CVERecord?id=CVE-2024-8354

** CVE added: https://cve.org/CVERecord?id=CVE-2025-11234

** CVE added: https://cve.org/CVERecord?id=CVE-2025-12464

** CVE added: https://cve.org/CVERecord?id=CVE-2025-14876

** CVE added: https://cve.org/CVERecord?id=CVE-2026-0665

-- 
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Title:
  QEMU does not emulate IOCTL TCGETS2

Status in QEMU:
  Fix Released
Status in qemu package in Ubuntu:
  Fix Released
Status in qemu source package in Jammy:
  Confirmed
Status in qemu source package in Noble:
  Confirmed
Status in qemu source package in Plucky:
  Won't Fix
Status in qemu source package in Questing:
  Confirmed
Status in qemu source package in Resolute:
  Fix Released

Bug description:
  In Ubuntu 25.10 we moved to glibc 2.42. Here glibc has changed the
  implementation of isatty(). It now uses IOCTL TCGETS2 instead of
  TCGETS. TCGETS2 is not emulated by static QEMU (qemu-riscv64, qemu-
  arm64, ...).

  This leads to failures in containers for foreign architectures. E.g. no console prompt is displayed. 
  A detailed analysis is contained in LP #2133188.

  A proper implementation of the missing IOCTLs will include:

  Functions:

  in linux-user/syscall.c:
  host_to_target_termios2()
  target_to_host_termios2()
  print_termios2()

  Definitions:

  in linux-user/syscall.c
  #define termios2 host_termios2

  in linux-user/syscall_types.h
  STRUCT_SPECIAL(termios2)

  in linux-user/ioctls.h:
  IOCTL(TCGETS2, IOC_R, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETS2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSF2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))
  IOCTL(TCSETSW2, IOC_W, MK_PTR(MK_STRUCT(STRUCT_termios2)))

  in linux-user/user-internals.h:
  void print_termios2(void *arg);

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