syzbot
WARNING in vmacache_find
Status:
upstream: reported syz repro on 2025/10/17 11:56
Bug presence:
origin:lts-only
[Documentation on labels]
Reported-by: syzbot+661da7313dc9ecc959b8@syzkaller.appspotmail.com
First crash: 316d, last: 9d01h
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Last patch testing requests (10)
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Fix bisection attempts (4)
Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 13122 at mm/vmacache.c:76 vmacache_find+0x55e/0x590 mm/vmacache.c:76
Modules linked in:
CPU: 1 PID: 13122 Comm: dhcpcd-run-hook Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:vmacache_find+0x55e/0x590 mm/vmacache.c:76
Code: fc ff ff e8 64 2f ce ff 45 31 e4 e9 9e fc ff ff e8 57 2f ce ff eb 13 e8 50 2f ce ff eb 0c e8 49 2f ce ff eb 05 e8 42 2f ce ff <0f> 0b 45 31 e4 e9 7a fc ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f
RSP: 0018:ffffc9000374f4a8 EFLAGS: 00010093
RAX: ffffffff81a99cb9 RBX: 00007f489ab0b107 RCX: ffff88801d389dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880730a2460 R08: dffffc0000000000 R09: ffffed100fcbc9b8
R10: ffffed100fcbc9b8 R11: 1ffff1100fcbc9b7 R12: ffff8880730a2420
R13: 0000000000000001 R14: ffff88807e5e4d00 R15: ffff88801d389dc0
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34b63fff CR3: 000000005c603000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
find_vma+0xc5/0x230 mm/mmap.c:2279
stack_map_get_build_id_offset+0x2a6/0x860 kernel/bpf/stackmap.c:196
__bpf_get_stackid+0x55d/0x920 kernel/bpf/stackmap.c:294
____bpf_get_stackid_raw_tp kernel/trace/bpf_trace.c:1465 [inline]
bpf_get_stackid_raw_tp+0x175/0x1b0 kernel/trace/bpf_trace.c:1454
bpf_prog_2e1c02a0a11ffecd+0x21/0xc2c
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
bpf_trace_run2+0x15b/0x2d0 kernel/trace/bpf_trace.c:1915
__traceiter_tlb_flush+0x69/0xb0 include/trace/events/tlb.h:38
trace_tlb_flush+0xe6/0x110 include/trace/events/tlb.h:38
switch_mm_irqs_off+0x6e3/0x9a0 arch/x86/mm/tlb.c:-1
switch_mm+0xa7/0x120 arch/x86/mm/tlb.c:323
exec_mmap+0x285/0x5c0 fs/exec.c:1024
begin_new_exec+0x7e8/0x1160 fs/exec.c:1293
load_elf_binary+0x98e/0x2890 fs/binfmt_elf.c:1001
search_binary_handler fs/exec.c:1742 [inline]
exec_binprm fs/exec.c:1783 [inline]
bprm_execve+0xa92/0x17d0 fs/exec.c:1852
do_execveat_common+0x51e/0x6d0 fs/exec.c:1957
do_execve fs/exec.c:2027 [inline]
__do_sys_execve fs/exec.c:2103 [inline]
__se_sys_execve fs/exec.c:2098 [inline]
__x64_sys_execve+0x8e/0xa0 fs/exec.c:2098
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f489ab0b107
Code: Unable to access opcode bytes at RIP 0x7f489ab0b0dd.
RSP: 002b:00007fff6486ab38 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 000055b16b817fe0 RCX: 00007f489ab0b107
RDX: 000055b16b818000 RSI: 000055b16b817fe0 RDI: 000055b16b818088
RBP: 000055b16b818088 R08: 00007fff6486deb9 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 000055b16b818000
R13: 00007f489acd0e8b R14: 000055b16b818000 R15: 0000000000000000
</TASK>
* Struck through repros no longer work on HEAD.