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WARNING: CPU: 1 PID: 20478 at kernel/signal.c:2008 posixtimer_send_sigqueue+0x9da/0xbc0 kernel/signal.c:2008
Modules linked in:
CPU: 1 UID: 0 PID: 20478 Comm: syz.7.4470 Not tainted 6.12.0-rc6-next-20241108-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:posixtimer_send_sigqueue+0x9da/0xbc0 kernel/signal.c:2008
Code: df 80 3c 08 00 74 08 48 89 df e8 c1 ad a5 00 4c 89 2b eb 51 e8 a7 32 3b 00 41 be 02 00 00 00 e9 e9 fd ff ff e8 97 32 3b 00 90 <0f> 0b 90 e9 f2 fa ff ff 4c 89 ef e8 86 33 5a 03 84 c0 0f 84 aa 01
RSP: 0018:ffffc90000a18c00 EFLAGS: 00010006
RAX: ffffffff81644979 RBX: 0000000000000001 RCX: ffff888025509e00
RDX: 0000000000010000 RSI: 0000000000000021 RDI: 0000000000000009
RBP: ffffc90000a18cf8 R08: ffffffff816450cc R09: 1ffffffff2857112
R10: dffffc0000000000 R11: fffffbfff2857113 R12: ffff888059505344
R13: 1ffff1100b2a0a68 R14: ffff8880595052c0 R15: ffff888059505380
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000573b4000 CR4: 00000000003526f0
Call Trace:
posix_timer_queue_signal kernel/time/posix-timers.c:308 [inline]
posix_timer_fn+0xe2/0x160 kernel/time/posix-timers.c:323
__run_hrtimer kernel/time/hrtimer.c:1739 [inline]
__hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1803
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:free_pages_and_swap_cache+0x1b8/0x690
Code: 09 00 48 8b 1b 48 89 de 48 83 e6 01 31 ff e8 ef 1c 9f ff 48 89 d8 48 83 e0 01 0f 85 5b 01 00 00 0f 1f 44 00 00 e8 f8 17 9f ff <4c> 89 fb 49 bf 00 00 00 00 00 fc ff df 4c 8d 64 24 60 48 89 5c 24
RSP: 0018:ffffc90004a6efe0 EFLAGS: 00000293
RAX: ffffffff82006418 RBX: 0000000000000000 RCX: ffff888025509e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004a6f268 R08: ffffffff82006401 R09: 1ffffd40001963e0
R10: dffffc0000000000 R11: fffff940001963e1 R12: ffffea0000cb1f40
R13: 1ffff110051a600c R14: ffff888028d30060 R15: ffffea0000cb1f40
__tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373
zap_pte_range mm/memory.c:1714 [inline]
zap_pmd_range mm/memory.c:1753 [inline]
zap_pud_range mm/memory.c:1782 [inline]
zap_p4d_range mm/memory.c:1803 [inline]
unmap_page_range+0x38b7/0x4230 mm/memory.c:1824
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1914
exit_mmap+0x292/0xcb0 mm/mmap.c:1667
__mmput+0x115/0x390 kernel/fork.c:1344
exit_mm+0x220/0x310 kernel/exit.c:570
do_exit+0x9b2/0x28e0 kernel/exit.c:925
do_group_exit+0x207/0x2c0 kernel/exit.c:1087
get_signal+0x16b2/0x1750 kernel/signal.c:3010
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0efa77e719
Code: Unable to access opcode bytes at 0x7f0efa77e6ef.
RSP: 002b:00007f0efb5350e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f0efa935f88 RCX: 00007f0efa77e719
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f0efa935f88
RBP: 00007f0efa935f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0efa935f8c
R13: 0000000000000000 R14: 00007ffcc3309600 R15: 00007ffcc33096e8
----------------
Code disassembly (best guess):
0: 09 00 or %eax,(%rax)
2: 48 8b 1b mov (%rbx),%rbx
5: 48 89 de mov %rbx,%rsi
8: 48 83 e6 01 and $0x1,%rsi
c: 31 ff xor %edi,%edi
e: e8 ef 1c 9f ff call 0xff9f1d02
13: 48 89 d8 mov %rbx,%rax
16: 48 83 e0 01 and $0x1,%rax
1a: 0f 85 5b 01 00 00 jne 0x17b
20: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
25: e8 f8 17 9f ff call 0xff9f1822
* 2a: 4c 89 fb mov %r15,%rbx <-- trapping instruction
2d: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15
34: fc ff df
37: 4c 8d 64 24 60 lea 0x60(%rsp),%r12
3c: 48 rex.W
3d: 89 .byte 0x89
3e: 5c pop %rsp
3f: 24 .byte 0x24