CFI failure at __traceiter_kfree+0x34/0x50 include/trace/events/kmem.h:95 (target: tp_stub_func+0x0/0x10; expected type: 0x8682d211)
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 92 Comm: klogd Not tainted 6.1.145-syzkaller-00038-g3b4ff5af8d36 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__traceiter_kfree+0x34/0x50 include/trace/events/kmem.h:95
Code: 8b 3d 58 42 ca 05 4d 85 ff 74 2e 48 89 d3 49 89 f6 49 8b 07 49 8b 7f 08 4c 89 f6 48 89 da 41 ba ef 2d 7d 79 44 03 50 fc 74 02 <0f> 0b ff d0 49 83 7f 18 00 4d 8d 7f 18 75 d8 31 c0 5b 41 5e 41 5f
RSP: 0018:ffffc900001b0b90 EFLAGS: 00010213
RAX: ffffffff81711ed0 RBX: ffff88812651e0f0 RCX: ffff888104debcc0
RDX: ffff88812651e0f0 RSI: ffffffff81a31216 RDI: ffffc90003fcc000
RBP: ffffc900001b0ba8 R08: ffff8881f5c00000 R09: 000000000002448b
R10: 000000001ebd94fb R11: 0000000000000001 R12: ffffffff81c42b00
R13: ffff8881328acd30 R14: ffffffff81a31216 R15: ffff88811d82e410
FS: 00007fd71b856c80(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000cf3d CR3: 00000001062b6000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
trace_kfree include/trace/events/kmem.h:95 [inline]
kfree+0xc9/0xf0 mm/slab_common.c:977
shmem_free_in_core_inode+0x76/0xb0 mm/shmem.c:3922
i_callback+0x5a/0x80 fs/inode.c:250
rcu_do_batch+0x515/0xb90 kernel/rcu/tree.c:2297
rcu_core+0x5a5/0xe70 kernel/rcu/tree.c:2557
rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2574
handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
__do_softirq kernel/softirq.c:680 [inline]
invoke_softirq kernel/softirq.c:497 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
instr_sysvec_call_function_single arch/x86/kernel/smp.c:262 [inline]
sysvec_call_function_single+0xa6/0xc0 arch/x86/kernel/smp.c:262
asm_sysvec_call_function_single+0x1b/0x20 arch/x86/include/asm/idtentry.h:699
RIP: 0010:check_kcov_mode kernel/kcov.c:193 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x36/0x90 kernel/kcov.c:313
Code: 10 67 92 7e 65 8b 0d 11 67 92 7e 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 6c 0b 00 00 00 74 52 8b 8a 48 0b 00 00 <83> f9 03 75 47 48 8b 8a 50 0b 00 00 44 8b 8a 4c 0b 00 00 49 c1 e1
RSP: 0018:ffffc90000a277f0 EFLAGS: 00000246
RAX: ffffffff84e20a56 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888104debcc0 RSI: 0000000000000010 RDI: 0000000000000029
RBP: ffffc90000a277f0 R08: ffff888104debcc0 R09: 0000000000000012
R10: 0000000000000012 R11: 0000000000000000 R12: ffff0a0000000509
R13: ffffc90000a27ae4 R14: 0000000000000010 R15: ffffffff8549ff61
vsnprintf+0x2e6/0x1960 lib/vsprintf.c:2838
sprintf+0xd6/0x120 lib/vsprintf.c:3009
print_time kernel/printk/printk.c:1276 [inline]
info_print_prefix+0x152/0x300 kernel/printk/printk.c:1302
record_print_text+0x151/0x420 kernel/printk/printk.c:1351
syslog_print+0x33b/0x550 kernel/printk/printk.c:1562
do_syslog+0x675/0x730 kernel/printk/printk.c:1681
__do_sys_syslog kernel/printk/printk.c:1773 [inline]
__se_sys_syslog kernel/printk/printk.c:1771 [inline]
__x64_sys_syslog+0x7c/0x90 kernel/printk/printk.c:1771
x64_sys_call+0x610/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:104
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd71ba20a37
Code: 73 01 c3 48 8b 0d c1 f3 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 67 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 f3 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffe08a91058 EFLAGS: 00000206 ORIG_RAX: 0000000000000067
RAX: ffffffffffffffda RBX: 00007fd71bbc0490 RCX: 00007fd71ba20a37
RDX: 00000000000003ff RSI: 00007fd71bbc0490 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000206 R12: 00007fd71bbc0490
R13: 00007fd71bb9ddfe R14: 00007fd71bbc04d3 R15: 00007fd71bbc04d3
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__traceiter_kfree+0x34/0x50 include/trace/events/kmem.h:95
Code: 8b 3d 58 42 ca 05 4d 85 ff 74 2e 48 89 d3 49 89 f6 49 8b 07 49 8b 7f 08 4c 89 f6 48 89 da 41 ba ef 2d 7d 79 44 03 50 fc 74 02 <0f> 0b ff d0 49 83 7f 18 00 4d 8d 7f 18 75 d8 31 c0 5b 41 5e 41 5f
RSP: 0018:ffffc900001b0b90 EFLAGS: 00010213
RAX: ffffffff81711ed0 RBX: ffff88812651e0f0 RCX: ffff888104debcc0
RDX: ffff88812651e0f0 RSI: ffffffff81a31216 RDI: ffffc90003fcc000
RBP: ffffc900001b0ba8 R08: ffff8881f5c00000 R09: 000000000002448b
R10: 000000001ebd94fb R11: 0000000000000001 R12: ffffffff81c42b00
R13: ffff8881328acd30 R14: ffffffff81a31216 R15: ffff88811d82e410
FS: 00007fd71b856c80(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000cf3d CR3: 00000001062b6000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
0: 10 67 92 adc %ah,-0x6e(%rdi)
3: 7e 65 jle 0x6a
5: 8b 0d 11 67 92 7e mov 0x7e926711(%rip),%ecx # 0x7e92671c
b: 81 e1 00 01 ff 00 and $0xff0100,%ecx
11: 74 11 je 0x24
13: 81 f9 00 01 00 00 cmp $0x100,%ecx
19: 75 5b jne 0x76
1b: 83 ba 6c 0b 00 00 00 cmpl $0x0,0xb6c(%rdx)
22: 74 52 je 0x76
24: 8b 8a 48 0b 00 00 mov 0xb48(%rdx),%ecx
* 2a: 83 f9 03 cmp $0x3,%ecx <-- trapping instruction
2d: 75 47 jne 0x76
2f: 48 8b 8a 50 0b 00 00 mov 0xb50(%rdx),%rcx
36: 44 8b 8a 4c 0b 00 00 mov 0xb4c(%rdx),%r9d
3d: 49 rex.WB
3e: c1 .byte 0xc1
3f: e1 .byte 0xe1