audit: type=1400 audit(1716702441.595:164): avc: denied { mounton } for pid=344 comm="syz-executor.0" path="/dev/binderfs" dev="devtmpfs" ino=362 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:device_t tclass=dir permissive=1
audit: type=1400 audit(1716702441.625:165): avc: denied { prog_load } for pid=349 comm="syz-executor.0" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1
BUG: unable to handle page fault for address: ffffffffff600000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0001) - permissions violation
PGD 6212067 P4D 6212067 PUD 6214067 PMD 6216067 PTE 8000000006209165
Oops: 0001 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 30 Comm: kauditd Not tainted 5.15.149-syzkaller-1069164-g424f92bcbe8f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:strncpy_from_kernel_nofault+0x92/0x1e0 mm/maccess.c:92
Code: d0 48 c1 e8 03 48 89 45 c0 42 0f b6 04 30 84 c0 48 89 55 c8 0f 85 eb 00 00 00 ff 02 45 31 e4 48 8b 55 d0 4c 8b 7d b8 49 89 dd <42> 8a 1c 23 4a 8d 3c 22 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0
RSP: 0018:ffffc900001ff728 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffffff600000 RCX: ffff8881001f2780
RDX: ffffc900001ff7c8 RSI: ffffffffff600000 RDI: ffffffffff600000
RBP: ffffc900001ff770 R08: ffffffff8135f4ed R09: ffffed102003e4f1
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffffffffff600000 R14: dffffc0000000000 R15: 0000000000000008
FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600000 CR3: 000000010cc9d000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
bpf_probe_read_kernel_str_common kernel/trace/bpf_trace.c:255 [inline]
____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:303 [inline]
bpf_probe_read_compat_str+0x112/0x180 kernel/trace/bpf_trace.c:296
bpf_prog_f17ebaf3f5f7baf8+0x3a/0xff0
bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
__bpf_prog_run include/linux/filter.h:625 [inline]
bpf_prog_run include/linux/filter.h:632 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1883 [inline]
bpf_trace_run3+0x11e/0x250 kernel/trace/bpf_trace.c:1921
__bpf_trace_sched_switch+0xb/0x10 include/trace/events/sched.h:220
trace_sched_switch include/trace/events/sched.h:220 [inline]
__schedule+0x134b/0x1590 kernel/sched/core.c:6509
preempt_schedule_common+0x9b/0xf0 kernel/sched/core.c:6688
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6713
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
vprintk_emit+0x32f/0x340 kernel/printk/printk.c:2289
vprintk_default+0x26/0x30 kernel/printk/printk.c:2303
vprintk+0x74/0x80 kernel/printk/printk_safe.c:45
_printk+0xd1/0x111 kernel/printk/printk.c:2313
kauditd_printk_skb kernel/audit.c:549 [inline]
kauditd_hold_skb+0x1bb/0x200 kernel/audit.c:584
kauditd_send_queue+0x28d/0x2e0 kernel/audit.c:769
kauditd_thread+0x529/0x8b0 kernel/audit.c:893
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
Modules linked in:
CR2: ffffffffff600000
---[ end trace 2e2f3f8514d86bfa ]---
RIP: 0010:strncpy_from_kernel_nofault+0x92/0x1e0 mm/maccess.c:92
Code: d0 48 c1 e8 03 48 89 45 c0 42 0f b6 04 30 84 c0 48 89 55 c8 0f 85 eb 00 00 00 ff 02 45 31 e4 48 8b 55 d0 4c 8b 7d b8 49 89 dd <42> 8a 1c 23 4a 8d 3c 22 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0
RSP: 0018:ffffc900001ff728 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffffff600000 RCX: ffff8881001f2780
RDX: ffffc900001ff7c8 RSI: ffffffffff600000 RDI: ffffffffff600000
RBP: ffffc900001ff770 R08: ffffffff8135f4ed R09: ffffed102003e4f1
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffffffffff600000 R14: dffffc0000000000 R15: 0000000000000008
FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600000 CR3: 000000010cc9d000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: d0 48 c1 rorb -0x3f(%rax)
3: e8 03 48 89 45 call 0x4589480b
8: c0 42 0f b6 rolb $0xb6,0xf(%rdx)
c: 04 30 add $0x30,%al
e: 84 c0 test %al,%al
10: 48 89 55 c8 mov %rdx,-0x38(%rbp)
14: 0f 85 eb 00 00 00 jne 0x105
1a: ff 02 incl (%rdx)
1c: 45 31 e4 xor %r12d,%r12d
1f: 48 8b 55 d0 mov -0x30(%rbp),%rdx
23: 4c 8b 7d b8 mov -0x48(%rbp),%r15
27: 49 89 dd mov %rbx,%r13
* 2a: 42 8a 1c 23 mov (%rbx,%r12,1),%bl <-- trapping instruction
2e: 4a 8d 3c 22 lea (%rdx,%r12,1),%rdi
32: 48 89 f8 mov %rdi,%rax
35: 48 c1 e8 03 shr $0x3,%rax
39: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax
3e: 84 c0 test %al,%al