From: kernel test robot <oliver.sang@intel.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: <oe-lkp@lists.linux.dev>, <lkp@intel.com>, <oliver.sang@intel.com>
Subject: [willy-pagecache:slab-future] [slab] d7a6fafee0: RIP:__ksize
Date: Tue, 2 Sep 2025 22:35:26 +0800 [thread overview]
Message-ID: <202509022248.dbe9cc08-lkp@intel.com> (raw)
Hello,
kernel test robot noticed "RIP:__ksize" on:
commit: d7a6fafee020f8dbe5863d2b6c2e8af5560df707 ("slab: Remove folio references from __ksize()")
git://git.infradead.org/users/willy/pagecache slab-future
in testcase: boot
config: x86_64-rhel-9.4-rust
compiler: clang-20
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202509022248.dbe9cc08-lkp@intel.com
[ 33.277388][ T1] ------------[ cut here ]------------
[ 33.279697][ T1] WARNING: mm/slab_common.c:1016 at __ksize+0xf2/0x120, CPU#0: swapper/0/1
[ 33.285126][ T1] Modules linked in:
[ 33.286841][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.17.0-rc3-next-20250829-00007-gd7a6fafee020 #1 PREEMPT(voluntary)
[ 33.291730][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 33.295871][ T1] RIP: 0010:__ksize (mm/slab_common.c:1016)
[ 33.297925][ T1] Code: 40 b8 00 10 00 00 48 d3 e0 48 3d 00 20 00 00 76 3b 49 29 f8 49 c1 e0 06 49 01 d0 4c 39 c6 74 cf 0f 0b 31 c0 c3 cc cc cc cc cc <0f> 0b 49 f7 00 40 00 00 00 75 04 31 c9 eb 05 41 0f b6 48 40 b8 00
All code
========
0: 40 b8 00 10 00 00 rex mov $0x1000,%eax
6: 48 d3 e0 shl %cl,%rax
9: 48 3d 00 20 00 00 cmp $0x2000,%rax
f: 76 3b jbe 0x4c
11: 49 29 f8 sub %rdi,%r8
14: 49 c1 e0 06 shl $0x6,%r8
18: 49 01 d0 add %rdx,%r8
1b: 4c 39 c6 cmp %r8,%rsi
1e: 74 cf je 0xffffffffffffffef
20: 0f 0b ud2
22: 31 c0 xor %eax,%eax
24: c3 ret
25: cc int3
26: cc int3
27: cc int3
28: cc int3
29: cc int3
2a:* 0f 0b ud2 <-- trapping instruction
2c: 49 f7 00 40 00 00 00 testq $0x40,(%r8)
33: 75 04 jne 0x39
35: 31 c9 xor %ecx,%ecx
37: eb 05 jmp 0x3e
39: 41 0f b6 48 40 movzbl 0x40(%r8),%ecx
3e: b8 .byte 0xb8
...
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 49 f7 00 40 00 00 00 testq $0x40,(%r8)
9: 75 04 jne 0xf
b: 31 c9 xor %ecx,%ecx
d: eb 05 jmp 0x14
f: 41 0f b6 48 40 movzbl 0x40(%r8),%ecx
14: b8 .byte 0xb8
...
[ 33.305617][ T1] RSP: 0000:ffffd2b500013758 EFLAGS: 00010206
[ 33.308164][ T1] RAX: 00000000ff000000 RBX: ffff8afbc1151000 RCX: 00000000ffffff01
[ 33.311355][ T1] RDX: ffff8afac0000000 RSI: ffff8afbc1151000 RDI: fffff31e80000000
[ 33.314664][ T1] RBP: 00000000ffffffea R08: fffff31e84045440 R09: 0000000000000000
[ 33.317962][ T1] R10: ffff8afbc1151000 R11: ffffffff89ff2090 R12: ffff8afbc3133220
[ 33.322047][ T1] R13: ffff8afc76ef1108 R14: ffff8afbc3133e00 R15: ffff8afbc1151800
[ 33.325523][ T1] FS: 0000000000000000(0000) GS:ffff8aff63a29000(0000) knlGS:0000000000000000
[ 33.329151][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 33.331822][ T1] CR2: ffff8afefffff000 CR3: 00000002e1e20000 CR4: 00000000000406f0
[ 33.335127][ T1] Call Trace:
[ 33.340398][ T1] <TASK>
[ 33.341827][ T1] kfree_sensitive (mm/slab_common.c:1234)
[ 33.343783][ T1] mpi_free (lib/crypto/mpi/mpiutil.c:?)
[ 33.345494][ T1] rsa_enc (crypto/rsa.c:62)
[ 33.347230][ T1] rsassa_pkcs1_verify (include/linux/crypto.h:383 crypto/rsassa-pkcs1.c:256)
[ 33.349482][ T1] public_key_verify_signature (crypto/asymmetric_keys/public_key.c:432)
[ 33.352192][ T1] ? __kmalloc_noprof (include/linux/kernel.h:?)
[ 33.354454][ T1] ? asymmetric_key_generate_id (crypto/asymmetric_keys/asymmetric_type.c:147)
[ 33.357247][ T1] x509_check_for_self_signed (crypto/asymmetric_keys/x509_public_key.c:126)
[ 33.359744][ T1] x509_cert_parse (crypto/asymmetric_keys/x509_cert_parser.c:130)
[ 33.361690][ T1] x509_key_preparse (crypto/asymmetric_keys/x509_public_key.c:157)
[ 33.368645][ T1] asymmetric_key_preparse (crypto/asymmetric_keys/asymmetric_type.c:409)
[ 33.371160][ T1] __key_create_or_update (security/keys/key.c:858)
[ 33.373639][ T1] key_create_or_update (security/keys/key.c:1021)
[ 33.376003][ T1] x509_load_certificate_list (crypto/asymmetric_keys/x509_loader.c:31)
[ 33.378485][ T1] ? load_module_cert (certs/system_keyring.c:280)
[ 33.380708][ T1] do_one_initcall (init/main.c:1281)
[ 33.382872][ T1] ? crng_make_state (include/linux/spinlock.h:406 drivers/char/random.c:363)
[ 33.385184][ T1] ? get_random_u32 (include/linux/string.h:366 include/crypto/chacha.h:119 drivers/char/random.c:425 drivers/char/random.c:554)
[ 33.387436][ T1] ? __get_random_u32_below (drivers/char/random.c:568)
[ 33.389903][ T1] ? allocate_slab (mm/slub.c:3073)
[ 33.392145][ T1] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050)
[ 33.394715][ T1] ? asm_sysvec_apic_timer_interrupt (arch/x86/include/asm/idtentry.h:697)
[ 33.397519][ T1] ? strlen (lib/string.c:420)
[ 33.399382][ T1] ? parameq (kernel/params.c:90 kernel/params.c:99)
[ 33.401356][ T1] ? do_initcall_level (init/main.c:1327)
[ 33.403660][ T1] ? parse_args (kernel/params.c:153)
[ 33.405789][ T1] do_initcall_level (init/main.c:1342)
[ 33.408096][ T1] do_initcalls (init/main.c:1356)
[ 33.410025][ T1] kernel_init_freeable (init/main.c:1593)
[ 33.412141][ T1] ? rest_init (init/main.c:1473)
[ 33.414170][ T1] kernel_init (init/main.c:1483)
[ 33.416292][ T1] ret_from_fork (arch/x86/kernel/process.c:154)
[ 33.418432][ T1] ? rest_init (init/main.c:1473)
[ 33.420469][ T1] ret_from_fork_asm (arch/x86/entry/entry_64.S:255)
[ 33.422651][ T1] </TASK>
[ 33.424207][ T1] ---[ end trace 0000000000000000 ]---
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250902/202509022248.dbe9cc08-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next reply other threads:[~2025-09-02 14:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-02 14:35 kernel test robot [this message]
2025-09-03 11:43 ` [willy-pagecache:slab-future] [slab] d7a6fafee0: RIP:__ksize Matthew Wilcox
2025-09-03 13:40 ` Oliver Sang
2025-09-09 18:25 ` Matthew Wilcox
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