0xc40: [1027095] delta:1 PADDING
0xc50: [1027096] delta:1 hd
expected end:0xc60 last event actually ended at:0xc60
------------[ cut here ]------------
system_state != SYSTEM_BOOTING
WARNING: kernel/trace/ring_buffer.c:4783 at check_buffer.cold+0x1a2/0x1ef kernel/trace/ring_buffer.c:4783, CPU#1: syz.9.13405/14094
Modules linked in:
CPU: 1 UID: 0 PID: 14094 Comm: syz.9.13405 Tainted: G B L syzkaller #0 PREEMPT(lazy)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2026
RIP: 0010:check_buffer.cold+0x1a2/0x1ef kernel/trace/ring_buffer.c:4783
Code: 03 0f b6 14 11 38 d0 7c 04 84 d2 75 5c 8b 2d 8c 16 22 10 31 ff 89 ee e8 1f f6 e8 00 85 ed 0f 84 38 91 eb 00 e8 a2 fb e8 00 90 <0f> 0b 90 e9 e3 8e eb 00 49 c7 c7 60 5e f6 8b e9 51 fe ff ff e8 98
RSP: 0018:ffffc90000a18b90 EFLAGS: 00010046
RAX: 8000000001000003 RBX: 1ffff92000143178 RCX: 0000000001000003
RDX: ffff8880835b1f40 RSI: ffffffff8123280e RDI: ffff8880835b1f40
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000000 R12: 00000000000fac1b
R13: ffff88801d2dd800 R14: ffff888075b91000 R15: ffffffff8bf65a00
FS: 0000000000000000(0000) GS:ffff888123c4f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33719ff8 CR3: 000000007ed6d000 CR4: 0000000000350ef0
Call Trace:
__rb_reserve_next.constprop.0+0x486/0x1640 kernel/trace/ring_buffer.c:4873
rb_reserve_next_event kernel/trace/ring_buffer.c:5010 [inline]
ring_buffer_lock_reserve+0x49a/0x1220 kernel/trace/ring_buffer.c:5069
__trace_buffer_lock_reserve kernel/trace/trace.h:1677 [inline]
trace_event_buffer_lock_reserve+0x123/0x6f0 kernel/trace/trace.c:1924
trace_event_buffer_reserve+0x1f9/0x350 kernel/trace/trace_events.c:715
do_trace_event_raw_event_x86_irq_vector arch/x86/include/asm/trace/irq_vectors.h:12 [inline]
trace_event_raw_event_x86_irq_vector+0xdd/0x200 arch/x86/include/asm/trace/irq_vectors.h:12
__do_trace_local_timer_exit arch/x86/include/asm/trace/irq_vectors.h:40 [inline]
trace_local_timer_exit arch/x86/include/asm/trace/irq_vectors.h:40 [inline]
__sysvec_apic_timer_interrupt+0x335/0x470 arch/x86/kernel/apic/apic.c:1069
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:page_table_check_clear+0x1c4/0x540 mm/page_table_check.c:81
Code: 48 89 44 24 10 4d 85 e4 0f 84 19 01 00 00 e8 43 38 81 ff 48 8b 1d 6c c7 78 0c 31 ff 44 89 f6 4c 01 e3 e8 3f 32 81 ff 45 84 f6 <0f> 84 49 01 00 00 e8 21 38 81 ff 48 8d 7b 04 be 04 00 00 00 48 89
RSP: 0018:ffffc9000ebef460 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88801f613718 RCX: ffffffff828aeb81
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8880835b1f40
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88801f6136d0
R13: 0000000000000001 R14: 0000000000000000 R15: dffffc0000000000
__page_table_check_pte_clear+0x10f/0x120 mm/page_table_check.c:155
page_table_check_pte_clear include/linux/page_table_check.h:55 [inline]
ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1259 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:879 [inline]
zap_present_folio_ptes mm/memory.c:1779 [inline]
zap_present_ptes mm/memory.c:1861 [inline]
do_zap_pte_range mm/memory.c:1963 [inline]
zap_pte_range mm/memory.c:2065 [inline]
zap_pmd_range mm/memory.c:2151 [inline]
zap_pud_range mm/memory.c:2179 [inline]
zap_p4d_range mm/memory.c:2200 [inline]
__zap_vma_range+0x2c43/0x48e0 mm/memory.c:2240
unmap_vmas+0x299/0x5f0 mm/memory.c:2309
exit_mmap+0x1ef/0xa00 mm/mmap.c:1315
__mmput+0x12a/0x410 kernel/fork.c:1193
mmput+0x67/0x80 kernel/fork.c:1216
exit_mm kernel/exit.c:592 [inline]
do_exit+0x83b/0x2a50 kernel/exit.c:974
do_group_exit+0xd5/0x2a0 kernel/exit.c:1129
get_signal+0x1ec7/0x21e0 kernel/signal.c:3112
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x139/0x700 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x661/0x790 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f543ab9e159
Code: Unable to access opcode bytes at 0x7f543ab9e12f.
RSP: 002b:00007f5438df60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f543ae25fa8 RCX: 00007f543ab9e159
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f543ae25fa8
RBP: 00007f543ae25fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f543ae26038 R14: 00007fffb7919a20 R15: 00007fffb7919b08
----------------
Code disassembly (best guess):
0: 48 89 44 24 10 mov %rax,0x10(%rsp)
5: 4d 85 e4 test %r12,%r12
8: 0f 84 19 01 00 00 je 0x127
e: e8 43 38 81 ff call 0xff813856
13: 48 8b 1d 6c c7 78 0c mov 0xc78c76c(%rip),%rbx # 0xc78c786
1a: 31 ff xor %edi,%edi
1c: 44 89 f6 mov %r14d,%esi
1f: 4c 01 e3 add %r12,%rbx
22: e8 3f 32 81 ff call 0xff813266
27: 45 84 f6 test %r14b,%r14b
* 2a: 0f 84 49 01 00 00 je 0x179 <-- trapping instruction
30: e8 21 38 81 ff call 0xff813856
35: 48 8d 7b 04 lea 0x4(%rbx),%rdi
39: be 04 00 00 00 mov $0x4,%esi
3e: 48 rex.W
3f: 89 .byte 0x89