* [syzbot] [bluetooth?] general protection fault in h5_recv
@ 2025-02-09 15:45 syzbot
2025-02-10 11:03 ` Hillf Danton
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: syzbot @ 2025-02-09 15:45 UTC (permalink / raw)
To: linux-bluetooth, linux-kernel, luiz.dentz, marcel, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: ed58d103e6da Add linux-next specific files for 20250207
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=11d782a4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=244a34ec1429746
dashboard link: https://syzkaller.appspot.com/bug?extid=b5691bb559396b262064
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=137f2bdf980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ce459b7174dd/disk-ed58d103.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/60699733c0c8/vmlinux-ed58d103.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f589bce7c898/bzImage-ed58d103.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b5691bb559396b262064@syzkaller.appspotmail.com
Oops: general protection fault, probably for non-canonical address 0xdffffc000000005f: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000002f8-0x00000000000002ff]
CPU: 1 UID: 0 PID: 9956 Comm: syz.2.1414 Not tainted 6.14.0-rc1-next-20250207-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:h5_recv+0x153/0x940 drivers/bluetooth/hci_h5.c:572
Code: 08 01 44 8b 64 24 04 48 8b 5c 24 08 4c 8b 74 24 18 49 ff c7 41 ff cc 45 85 e4 0f 8e 55 06 00 00 e8 e2 f5 f5 f8 48 8b 44 24 30 <42> 80 3c 28 00 74 08 48 89 df e8 be d1 5c f9 48 8b 1b 31 ff 48 89
RSP: 0000:ffffc90004cafc60 EFLAGS: 00010202
RAX: 000000000000005f RBX: 00000000000002f8 RCX: 0000000000000061
RDX: ffff888033690000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004cafd70 R08: ffffffff88c9927e R09: 1ffff110048c0403
R10: dffffc0000000000 R11: ffffffff88c991c0 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff888024602000 R15: ffffc90004cafe00
FS: 00007f50a01cf6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000040000001f000 CR3: 0000000028c32000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
hci_uart_tty_receive+0x141/0x1c0 drivers/bluetooth/hci_ldisc.c:622
tiocsti+0x24d/0x300 drivers/tty/tty_io.c:2299
tty_ioctl+0x518/0xdc0 drivers/tty/tty_io.c:2716
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf1/0x160 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f509f38cde9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f50a01cf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f509f5a6080 RCX: 00007f509f38cde9
RDX: 0000400000000180 RSI: 0000000000005412 RDI: 0000000000000003
RBP: 00007f509f40e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f509f5a6080 R15: 00007ffed807d2a8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:h5_recv+0x153/0x940 drivers/bluetooth/hci_h5.c:572
Code: 08 01 44 8b 64 24 04 48 8b 5c 24 08 4c 8b 74 24 18 49 ff c7 41 ff cc 45 85 e4 0f 8e 55 06 00 00 e8 e2 f5 f5 f8 48 8b 44 24 30 <42> 80 3c 28 00 74 08 48 89 df e8 be d1 5c f9 48 8b 1b 31 ff 48 89
RSP: 0000:ffffc90004cafc60 EFLAGS: 00010202
RAX: 000000000000005f RBX: 00000000000002f8 RCX: 0000000000000061
RDX: ffff888033690000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004cafd70 R08: ffffffff88c9927e R09: 1ffff110048c0403
R10: dffffc0000000000 R11: ffffffff88c991c0 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff888024602000 R15: ffffc90004cafe00
FS: 00007f50a01cf6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000028c32000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 08 01 or %al,(%rcx)
2: 44 8b 64 24 04 mov 0x4(%rsp),%r12d
7: 48 8b 5c 24 08 mov 0x8(%rsp),%rbx
c: 4c 8b 74 24 18 mov 0x18(%rsp),%r14
11: 49 ff c7 inc %r15
14: 41 ff cc dec %r12d
17: 45 85 e4 test %r12d,%r12d
1a: 0f 8e 55 06 00 00 jle 0x675
20: e8 e2 f5 f5 f8 call 0xf8f5f607
25: 48 8b 44 24 30 mov 0x30(%rsp),%rax
* 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 48 89 df mov %rbx,%rdi
34: e8 be d1 5c f9 call 0xf95cd1f7
39: 48 8b 1b mov (%rbx),%rbx
3c: 31 ff xor %edi,%edi
3e: 48 rex.W
3f: 89 .byte 0x89
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [bluetooth?] general protection fault in h5_recv
2025-02-09 15:45 [syzbot] [bluetooth?] general protection fault in h5_recv syzbot
@ 2025-02-10 11:03 ` Hillf Danton
2025-02-10 11:47 ` syzbot
2025-02-11 7:05 ` syzbot
2025-02-12 0:12 ` syzbot
2 siblings, 1 reply; 5+ messages in thread
From: Hillf Danton @ 2025-02-10 11:03 UTC (permalink / raw)
To: syzbot; +Cc: linux-kernel, syzkaller-bugs
On Sun, 09 Feb 2025 07:45:19 -0800
> syzbot found the following issue on:
>
> HEAD commit: ed58d103e6da Add linux-next specific files for 20250207
> git tree: linux-next
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=137f2bdf980000
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
--- x/drivers/bluetooth/hci_ldisc.c
+++ y/drivers/bluetooth/hci_ldisc.c
@@ -711,6 +711,7 @@ static int hci_uart_set_proto(struct hci
err = hci_uart_register_dev(hu);
if (err) {
+ clear_bit(HCI_UART_PROTO_READY, &hu->flags);
return err;
}
--
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [bluetooth?] general protection fault in h5_recv
2025-02-10 11:03 ` Hillf Danton
@ 2025-02-10 11:47 ` syzbot
0 siblings, 0 replies; 5+ messages in thread
From: syzbot @ 2025-02-10 11:47 UTC (permalink / raw)
To: hdanton, linux-kernel, syzkaller-bugs
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-by: syzbot+b5691bb559396b262064@syzkaller.appspotmail.com
Tested-by: syzbot+b5691bb559396b262064@syzkaller.appspotmail.com
Tested on:
commit: df5d6180 Add linux-next specific files for 20250210
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=12b3c2a4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=2cd616b6e736ca7
dashboard link: https://syzkaller.appspot.com/bug?extid=b5691bb559396b262064
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=117dc2a4580000
Note: testing is done by a robot and is best-effort only.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [bluetooth?] general protection fault in h5_recv
2025-02-09 15:45 [syzbot] [bluetooth?] general protection fault in h5_recv syzbot
2025-02-10 11:03 ` Hillf Danton
@ 2025-02-11 7:05 ` syzbot
2025-02-12 0:12 ` syzbot
2 siblings, 0 replies; 5+ messages in thread
From: syzbot @ 2025-02-11 7:05 UTC (permalink / raw)
To: hdanton, linux-bluetooth, linux-kernel, luiz.dentz, marcel,
syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: df5d6180169a Add linux-next specific files for 20250210
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=14a9c3f8580000
kernel config: https://syzkaller.appspot.com/x/.config?x=2cd616b6e736ca7
dashboard link: https://syzkaller.appspot.com/bug?extid=b5691bb559396b262064
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=149c78e4580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=129c78e4580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/92495cf20271/disk-df5d6180.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4b3656161842/vmlinux-df5d6180.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7fbc4e7a0f5d/bzImage-df5d6180.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b5691bb559396b262064@syzkaller.appspotmail.com
Oops: general protection fault, probably for non-canonical address 0xdffffc000000005f: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000002f8-0x00000000000002ff]
CPU: 1 UID: 0 PID: 5834 Comm: syz-executor200 Not tainted 6.14.0-rc2-next-20250210-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:h5_recv+0x153/0x940 drivers/bluetooth/hci_h5.c:572
Code: 08 01 44 8b 64 24 04 48 8b 5c 24 08 4c 8b 74 24 18 49 ff c7 41 ff cc 45 85 e4 0f 8e 55 06 00 00 e8 a2 58 f5 f8 48 8b 44 24 30 <42> 80 3c 28 00 74 08 48 89 df e8 ce 53 5c f9 48 8b 1b 31 ff 48 89
RSP: 0018:ffffc90003e8fc60 EFLAGS: 00010202
RAX: 000000000000005f RBX: 00000000000002f8 RCX: 0000000000000061
RDX: ffff8880350dda00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003e8fd70 R08: ffffffff88ca308e R09: 1ffff110062cdb03
R10: dffffc0000000000 R11: ffffffff88ca2fd0 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff88803166d800 R15: ffffc90003e8fe00
FS: 00007f38f1dd06c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f38f1d8ed58 CR3: 000000007b704000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
hci_uart_tty_receive+0x141/0x1c0 drivers/bluetooth/hci_ldisc.c:622
tiocsti+0x24d/0x300 drivers/tty/tty_io.c:2299
tty_ioctl+0x518/0xdc0 drivers/tty/tty_io.c:2716
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf1/0x160 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f38f1e183d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f38f1dd0218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f38f1e9f328 RCX: 00007f38f1e183d9
RDX: 0000400000000040 RSI: 0000000000005412 RDI: 0000000000000006
RBP: 00007f38f1e9f320 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f38f1e6c074
R13: 0000400000000300 R14: 00004000000000c0 R15: 0000400000000040
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:h5_recv+0x153/0x940 drivers/bluetooth/hci_h5.c:572
Code: 08 01 44 8b 64 24 04 48 8b 5c 24 08 4c 8b 74 24 18 49 ff c7 41 ff cc 45 85 e4 0f 8e 55 06 00 00 e8 a2 58 f5 f8 48 8b 44 24 30 <42> 80 3c 28 00 74 08 48 89 df e8 ce 53 5c f9 48 8b 1b 31 ff 48 89
RSP: 0018:ffffc90003e8fc60 EFLAGS: 00010202
RAX: 000000000000005f RBX: 00000000000002f8 RCX: 0000000000000061
RDX: ffff8880350dda00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003e8fd70 R08: ffffffff88ca308e R09: 1ffff110062cdb03
R10: dffffc0000000000 R11: ffffffff88ca2fd0 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff88803166d800 R15: ffffc90003e8fe00
FS: 00007f38f1dd06c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000040000000f000 CR3: 000000007b704000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 08 01 or %al,(%rcx)
2: 44 8b 64 24 04 mov 0x4(%rsp),%r12d
7: 48 8b 5c 24 08 mov 0x8(%rsp),%rbx
c: 4c 8b 74 24 18 mov 0x18(%rsp),%r14
11: 49 ff c7 inc %r15
14: 41 ff cc dec %r12d
17: 45 85 e4 test %r12d,%r12d
1a: 0f 8e 55 06 00 00 jle 0x675
20: e8 a2 58 f5 f8 call 0xf8f558c7
25: 48 8b 44 24 30 mov 0x30(%rsp),%rax
* 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 48 89 df mov %rbx,%rdi
34: e8 ce 53 5c f9 call 0xf95c5407
39: 48 8b 1b mov (%rbx),%rbx
3c: 31 ff xor %edi,%edi
3e: 48 rex.W
3f: 89 .byte 0x89
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [bluetooth?] general protection fault in h5_recv
2025-02-09 15:45 [syzbot] [bluetooth?] general protection fault in h5_recv syzbot
2025-02-10 11:03 ` Hillf Danton
2025-02-11 7:05 ` syzbot
@ 2025-02-12 0:12 ` syzbot
2 siblings, 0 replies; 5+ messages in thread
From: syzbot @ 2025-02-12 0:12 UTC (permalink / raw)
To: avkrasnov, hdanton, linux-bluetooth, linux-kernel, luiz.dentz,
luiz.von.dentz, marcel, syzkaller-bugs
syzbot has bisected this issue to:
commit c411c62cc13319533b1861e00cedc4883c3bc1bb
Author: Arseniy Krasnov <avkrasnov@salutedevices.com>
Date: Thu Jan 30 18:43:26 2025 +0000
Bluetooth: hci_uart: fix race during initialization
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=138cdbdf980000
start commit: df5d6180169a Add linux-next specific files for 20250210
git tree: linux-next
final oops: https://syzkaller.appspot.com/x/report.txt?x=104cdbdf980000
console output: https://syzkaller.appspot.com/x/log.txt?x=178cdbdf980000
kernel config: https://syzkaller.appspot.com/x/.config?x=2cd616b6e736ca7
dashboard link: https://syzkaller.appspot.com/bug?extid=b5691bb559396b262064
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=149c78e4580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=129c78e4580000
Reported-by: syzbot+b5691bb559396b262064@syzkaller.appspotmail.com
Fixes: c411c62cc133 ("Bluetooth: hci_uart: fix race during initialization")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2025-02-12 0:12 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-02-09 15:45 [syzbot] [bluetooth?] general protection fault in h5_recv syzbot
2025-02-10 11:03 ` Hillf Danton
2025-02-10 11:47 ` syzbot
2025-02-11 7:05 ` syzbot
2025-02-12 0:12 ` syzbot
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox