general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 0 PID: 4206 Comm: syz-executor.1 Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:cgroup_file_write+0xbe/0x790 kernel/cgroup/cgroup.c:3831
Code: 81 c3 88 08 00 00 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 b0 3f 51 00 48 8b 1b 48 83 c3 40 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 93 3f 51 00 48 8b 03 48 89 44 24
RSP: 0018:ffffc90003b2f2a0 EFLAGS: 00010202
RAX: 0000000000000008 RBX: 0000000000000040 RCX: ffff88801d6e9d00
RDX: 0000000000000000 RSI: ffff88801f864700 RDI: ffff88802356bc00
RBP: ffffc90003b2f390 R08: ffffffff82074ea3 R09: fffffbfff1ff3dfc
R10: fffffbfff1ff3dfc R11: 0000000000000000 R12: 1ffff92000765e5c
R13: ffff88802356bc00 R14: ffff88802356bc00 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e625000 CR3: 000000001e9a0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
kernfs_fop_write_iter+0x3b6/0x510 fs/kernfs/file.c:296
__kernel_write+0x5d1/0xaf0 fs/read_write.c:535
do_acct_process+0x112a/0x17b0 kernel/acct.c:518
acct_pin_kill+0x27/0x130 kernel/acct.c:173
pin_kill+0x2a6/0x940 fs/fs_pin.c:44
mnt_pin_kill+0xc1/0x170 fs/fs_pin.c:81
cleanup_mnt+0x4bc/0x510 fs/namespace.c:1130
task_work_run+0x146/0x1c0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0x705/0x2340 kernel/exit.c:832
do_group_exit+0x168/0x2d0 kernel/exit.c:929
get_signal+0x1740/0x2120 kernel/signal.c:2852
arch_do_signal_or_restart+0x9c/0x730 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x191/0x220 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fbaba320e99
Code: Unable to access opcode bytes at RIP 0x7fbaba320e6f.
RSP: 002b:00007fbab8c96218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fbaba433f68 RCX: 00007fbaba320e99
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbaba433f68
RBP: 00007fbaba433f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbaba433f6c
R13: 00007ffd5c7d6b6f R14: 00007fbab8c96300 R15: 0000000000022000
</TASK>
Modules linked in:
---[ end trace fdc5409623742eb4 ]---
RIP: 0010:cgroup_file_write+0xbe/0x790 kernel/cgroup/cgroup.c:3831
Code: 81 c3 88 08 00 00 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 b0 3f 51 00 48 8b 1b 48 83 c3 40 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 93 3f 51 00 48 8b 03 48 89 44 24
RSP: 0018:ffffc90003b2f2a0 EFLAGS: 00010202
RAX: 0000000000000008 RBX: 0000000000000040 RCX: ffff88801d6e9d00
RDX: 0000000000000000 RSI: ffff88801f864700 RDI: ffff88802356bc00
RBP: ffffc90003b2f390 R08: ffffffff82074ea3 R09: fffffbfff1ff3dfc
R10: fffffbfff1ff3dfc R11: 0000000000000000 R12: 1ffff92000765e5c
R13: ffff88802356bc00 R14: ffff88802356bc00 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e625000 CR3: 000000001e9a0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 81 c3 88 08 00 00 add $0x888,%ebx
6: 48 89 d8 mov %rbx,%rax
9: 48 c1 e8 03 shr $0x3,%rax
d: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
12: 74 08 je 0x1c
14: 48 89 df mov %rbx,%rdi
17: e8 b0 3f 51 00 callq 0x513fcc
1c: 48 8b 1b mov (%rbx),%rbx
1f: 48 83 c3 40 add $0x40,%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 48 89 df mov %rbx,%rdi
34: e8 93 3f 51 00 callq 0x513fcc
39: 48 8b 03 mov (%rbx),%rax
3c: 48 rex.W
3d: 89 .byte 0x89
3e: 44 rex.R
3f: 24 .byte 0x24