./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3425008880
<...>
syzkaller
syzkaller login: [ 10.871136][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #80!!!
[ 11.471144][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #280!!!
[ 11.560153][ T23] kauditd_printk_skb: 60 callbacks suppressed
[ 11.560159][ T23] audit: type=1400 audit(1653603011.950:71): avc: denied { transition } for pid=289 comm="sshd" path="/bin/sh" dev="sda1" ino=73 scontext=system_u:system_r:initrc_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[ 11.567295][ T23] audit: type=1400 audit(1653603011.960:72): avc: denied { write } for pid=289 comm="sh" path="pipe:[393]" dev="pipefs" ino=393 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1
[ 12.281154][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #88!!!
[ 13.048360][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08!!!
[ 16.811209][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #82!!!
Warning: Permanently added '10.128.0.84' (ECDSA) to the list of known hosts.
execve("./syz-executor3425008880", ["./syz-executor3425008880"], 0x7ffe6ceedee0 /* 10 vars */) = 0
brk(NULL) = 0x555555e11000
brk(0x555555e11c40) = 0x555555e11c40
arch_prctl(ARCH_SET_FS, 0x555555e11300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
readlink("/proc/self/exe", "/root/syz-executor3425008880", 4096) = 28
brk(0x555555e32c40) = 0x555555e32c40
brk(0x555555e33000) = 0x555555e33000
mprotect(0x7f2f54a57000, 16384, PROT_READ) = 0
mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000
mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000
mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000
openat(AT_FDCWD, "/sys/kernel/debug/failslab/ignore-gfp-wait", O_WRONLY|O_CLOEXEC) = 3
write(3, "N", 1) = 1
close(3) = 0
openat(AT_FDCWD, "/sys/kernel/debug/fail_futex/ignore-private", O_WRONLY|O_CLOEXEC) = 3
write(3, "N", 1) = 1
close(3) = 0
openat(AT_FDCWD, "/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", O_WRONLY|O_CLOEXEC) = 3
write(3, "N", 1) = 1
close(3) = 0
openat(AT_FDCWD, "/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", O_WRONLY|O_CLOEXEC) = 3
write(3, "N", 1) = 1
close(3) = 0
openat(AT_FDCWD, "/sys/kernel/debug/fail_page_alloc/min-order", O_WRONLY|O_CLOEXEC) = 3
write(3, "0", 1) = 1
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555e115d0) = 372
./strace-static-x86_64: Process 372 attached
[pid 372] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 372] setpgid(0, 0) = 0
[pid 372] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 372] write(3, "1000", 4) = 4
[pid 372] close(3) = 0
[pid 372] openat(AT_FDCWD, "/dev/loop-control", O_RDONLY) = 3
[pid 372] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR) = 4
[pid 372] write(4, "72", 2) = 2
[pid 372] ioctl(3, LOOP_CTL_ADD, 0) = -1 EEXIST (File exists)
[ 19.146879][ T23] audit: type=1400 audit(1653603019.540:73): avc: denied { execmem } for pid=371 comm="syz-executor342" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[ 19.166494][ T23] audit: type=1400 audit(1653603019.550:74): avc: denied { read } for pid=372 comm="syz-executor342" name="loop-control" dev="devtmpfs" ino=114 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:loop_control_device_t tclass=chr_file permissive=1
[pid 372] ioctl(3, LOOP_CTL_REMOVE, 0) = 0
[pid 372] exit_group(0) = ?
[pid 372] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=372, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555e115d0) = 375
./strace-static-x86_64: Process 375 attached
[pid 375] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 375] setpgid(0, 0) = 0
[pid 375] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 375] write(3, "1000", 4) = 4
[pid 375] close(3) = 0
[pid 375] openat(AT_FDCWD, "/dev/loop-control", O_RDONLY) = 3
[pid 375] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR) = 4
[pid 375] write(4, "72", 2) = 2
[ 19.191394][ T23] audit: type=1400 audit(1653603019.550:75): avc: denied { open } for pid=372 comm="syz-executor342" path="/dev/loop-control" dev="devtmpfs" ino=114 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:loop_control_device_t tclass=chr_file permissive=1
[ 19.216307][ T23] audit: type=1400 audit(1653603019.550:76): avc: denied { ioctl } for pid=372 comm="syz-executor342" path="/dev/loop-control" dev="devtmpfs" ino=114 ioctlcmd=0x4c80 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:loop_control_device_t tclass=chr_file permissive=1
[ 19.228455][ T375] FAULT_INJECTION: forcing a failure.
[ 19.228455][ T375] name failslab, interval 1, probability 0, space 0, times 1
[ 19.242860][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08!!!
[ 19.255357][ T375] CPU: 0 PID: 375 Comm: syz-executor342 Not tainted 5.10.117-syzkaller-00813-g0974b8411a58 #0
[ 19.274418][ T375] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 19.284447][ T375] Call Trace:
[ 19.287718][ T375] dump_stack_lvl+0x1e2/0x24b
[ 19.292481][ T375] ? panic+0x7d7/0x7d7
[ 19.296522][ T375] ? bfq_pos_tree_add_move+0x43e/0x43e
[ 19.301958][ T375] ? _raw_spin_lock_bh+0xa3/0x1b0
[ 19.306967][ T375] ? _raw_spin_lock_irq+0x1b0/0x1b0
[ 19.312140][ T375] dump_stack+0x15/0x17
[ 19.316269][ T375] should_fail+0x3c0/0x510
[ 19.320658][ T375] ? kobj_map+0x72/0x6f0
[ 19.324875][ T375] __should_failslab+0x9f/0xe0
[ 19.329611][ T375] should_failslab+0x9/0x20
[ 19.334088][ T375] __kmalloc+0x60/0x360
[ 19.338237][ T375] ? __device_add_disk+0x536/0x11d0
[ 19.343415][ T375] kobj_map+0x72/0x6f0
[ 19.347463][ T375] ? exact_match+0x20/0x20
[ 19.351863][ T375] ? bdev_check_media_change+0x4c0/0x4c0
[ 19.357467][ T375] __device_add_disk+0x663/0x11d0
[ 19.362471][ T375] ? device_add_disk+0x40/0x40
[ 19.367224][ T375] ? loop_add+0x3f0/0x760
[ 19.371528][ T375] ? vsprintf+0x40/0x40
[ 19.375665][ T375] device_add_disk+0x2a/0x40
[ 19.380230][ T375] loop_add+0x58f/0x760
[ 19.384360][ T375] loop_control_ioctl+0x564/0x740
[ 19.389359][ T375] ? loop_remove+0xb0/0xb0
[ 19.393969][ T375] ? _raw_spin_unlock_irq+0x4e/0x70
[ 19.399156][ T375] ? ptrace_notify+0x248/0x340
[ 19.403894][ T375] ? do_notify_parent+0xa60/0xa60
[ 19.409009][ T375] ? __fpregs_load_activate+0x1e7/0x370
[ 19.414529][ T375] ? security_file_ioctl+0xb1/0xd0
[ 19.422923][ T375] ? loop_remove+0xb0/0xb0
[ 19.427327][ T375] __se_sys_ioctl+0x115/0x190
[ 19.431990][ T375] __x64_sys_ioctl+0x7b/0x90
[ 19.436558][ T375] do_syscall_64+0x34/0x70
[ 19.440951][ T375] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 19.446825][ T375] RIP: 0033:0x7f2f549ea069
[ 19.451219][ T375] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 19.470814][ T375] RSP: 002b:00007fff079fce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 19.479304][ T375] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f2f549ea069
[ 19.487252][ T375] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003
[pid 375] ioctl(3, LOOP_CTL_ADD, 0) = 0
[pid 375] ioctl(3, LOOP_CTL_REMOVE, 0) = -1 EBUSY (Device or resource busy)
[pid 375] exit_group(0) = ?
[pid 375] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=375, si_uid=0, si_status=0, si_utime=0, si_stime=3} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 376 attached
, child_tidptr=0x555555e115d0) = 376
[pid 376] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 376] setpgid(0, 0) = 0
[pid 376] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 376] write(3, "1000", 4) = 4
[pid 376] close(3) = 0
[pid 376] openat(AT_FDCWD, "/dev/loop-control", O_RDONLY) = 3
[pid 376] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR) = 4
[pid 376] write(4, "72", 2) = 2
[pid 376] ioctl(3, LOOP_CTL_ADD, 0) = -1 EEXIST (File exists)
[ 19.495199][ T375] RBP: 00007fff079fce30 R08: 0000000000000002 R09: 0000000000000001
[ 19.503148][ T375] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
[ 19.511105][ T375] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
[pid 376] ioctl(3, LOOP_CTL_REMOVE, 0) = 0
[pid 376] exit_group(0) = ?
[pid 376] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=376, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555e115d0) = 377
./strace-static-x86_64: Process 377 attached
[pid 377] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 377] setpgid(0, 0) = 0
[pid 377] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 377] write(3, "1000", 4) = 4
[pid 377] close(3) = 0
[pid 377] openat(AT_FDCWD, "/dev/loop-control", O_RDONLY) = 3
[pid 377] openat(AT_FDCWD, "/proc/thread-self/fail-nth", O_RDWR) = 4
[pid 377] write(4, "72", 2) = 2
[ 19.565931][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #40!!!
[ 19.566530][ T377] FAULT_INJECTION: forcing a failure.
[ 19.566530][ T377] name failslab, interval 1, probability 0, space 0, times 0
[ 19.587650][ T377] CPU: 0 PID: 377 Comm: syz-executor342 Not tainted 5.10.117-syzkaller-00813-g0974b8411a58 #0
[ 19.597875][ T377] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 19.607918][ T377] Call Trace:
[ 19.611199][ T377] dump_stack_lvl+0x1e2/0x24b
[ 19.615853][ T377] ? panic+0x7d7/0x7d7
[ 19.619916][ T377] ? bfq_pos_tree_add_move+0x43e/0x43e
[ 19.625357][ T377] ? __kasan_kmalloc+0x9/0x10
[ 19.630010][ T377] ? kobj_map+0x72/0x6f0
[ 19.634228][ T377] ? __device_add_disk+0x663/0x11d0
[ 19.639397][ T377] ? device_add_disk+0x2a/0x40
[ 19.644138][ T377] ? loop_control_ioctl+0x564/0x740
[ 19.649311][ T377] ? __se_sys_ioctl+0x115/0x190
[ 19.654136][ T377] ? __x64_sys_ioctl+0x7b/0x90
[ 19.658875][ T377] dump_stack+0x15/0x17
[ 19.663010][ T377] should_fail+0x3c0/0x510
[ 19.667493][ T377] ? kvasprintf_const+0x139/0x180
[ 19.672503][ T377] __should_failslab+0x9f/0xe0
[ 19.677275][ T377] should_failslab+0x9/0x20
[ 19.681749][ T377] __kmalloc_track_caller+0x5f/0x350
[ 19.687006][ T377] kstrdup_const+0x55/0x90
[ 19.691395][ T377] kvasprintf_const+0x139/0x180
[ 19.696219][ T377] kobject_set_name_vargs+0x61/0x120
[ 19.701475][ T377] dev_set_name+0xd1/0x120
[ 19.705870][ T377] ? __kmalloc+0x1f7/0x360
[ 19.710269][ T377] ? get_device+0x30/0x30
[ 19.714604][ T377] ? kobj_map+0x6ad/0x6f0
[ 19.718915][ T377] __device_add_disk+0x6e5/0x11d0
[ 19.723916][ T377] ? device_add_disk+0x40/0x40
[ 19.728656][ T377] ? vsprintf+0x40/0x40
[ 19.732876][ T377] device_add_disk+0x2a/0x40
[ 19.737614][ T377] loop_add+0x58f/0x760
[ 19.741742][ T377] loop_control_ioctl+0x564/0x740
[ 19.746742][ T377] ? loop_remove+0xb0/0xb0
[ 19.751133][ T377] ? _raw_spin_unlock_irq+0x4e/0x70
[ 19.756302][ T377] ? ptrace_notify+0x248/0x340
[ 19.761036][ T377] ? do_notify_parent+0xa60/0xa60
[ 19.766034][ T377] ? __fpregs_load_activate+0x1e7/0x370
[ 19.771550][ T377] ? security_file_ioctl+0xb1/0xd0
[ 19.776634][ T377] ? loop_remove+0xb0/0xb0
[ 19.781046][ T377] __se_sys_ioctl+0x115/0x190
[ 19.785702][ T377] __x64_sys_ioctl+0x7b/0x90
[ 19.790361][ T377] do_syscall_64+0x34/0x70
[ 19.794756][ T377] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 19.800620][ T377] RIP: 0033:0x7f2f549ea069
[ 19.805010][ T377] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 19.824591][ T377] RSP: 002b:00007fff079fce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 19.832978][ T377] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f2f549ea069
[ 19.840927][ T377] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003
[ 19.848873][ T377] RBP: 00007fff079fce30 R08: 0000000000000002 R09: 0000000000000001
[ 19.856820][ T377] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
[ 19.864769][ T377] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
[ 19.872832][ T377] kobject_add_internal failed for queue (error: -2 parent: (null))
[ 19.880769][ T377] ------------[ cut here ]------------
[ 19.886262][ T377] WARNING: CPU: 0 PID: 377 at fs/sysfs/file.c:328 sysfs_create_files+0x215/0x4a0
[ 19.895364][ T377] Modules linked in:
[ 19.899245][ T377] CPU: 0 PID: 377 Comm: syz-executor342 Not tainted 5.10.117-syzkaller-00813-g0974b8411a58 #0
[ 19.909505][ T377] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 19.919568][ T377] RIP: 0010:sysfs_create_files+0x215/0x4a0
[ 19.925370][ T377] Code: 24 04 48 b9 00 00 00 00 00 fc ff df 48 8b 54 24 08 4c 8b 74 24 20 eb 2b 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 e8 ab f0 9a ff <0f> 0b c7 44 24 04 ea ff ff ff 48 b9 00 00 00 00 00 fc ff df 48 8b
[ 19.944974][ T377] RSP: 0018:ffffc900009dfae0 EFLAGS: 00010293
[ 19.951034][ T377] RAX: ffffffff81d1c221 RBX: ffff8881057ec098 RCX: ffff8881002d2780
[ 19.959016][ T377] RDX: 0000000000000000 RSI: ffffffff86539560 RDI: ffff8881057ec068
[ 19.966982][ T377] RBP: ffffc900009dfbb0 R08: ffffffff826b9748 R09: ffffed10213e2e36
[ 19.974972][ T377] R10: ffffed10213e2e36 R11: 1ffff110213e2e35 R12: 0000000000000000
[ 19.982938][ T377] R13: ffffffff854302a0 R14: ffff8881057ec068 R15: ffffffff86539560
[ 19.990895][ T377] FS: 0000555555e11300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
[ 19.999917][ T377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 20.006598][ T377] CR2: 00007f2f54a199a0 CR3: 0000000105fb6000 CR4: 00000000003506b0
[ 20.014889][ T377] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 20.022951][ T377] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 20.030905][ T377] Call Trace:
[ 20.034196][ T377] ? sysfs_create_file_ns+0x2a0/0x2a0
[ 20.039566][ T377] ? __kasan_check_write+0x14/0x20
[ 20.044858][ T377] ? kobject_get+0xd2/0x120
[ 20.049357][ T377] __device_add_disk+0x9cb/0x11d0
[ 20.054384][ T377] ? device_add_disk+0x40/0x40
[ 20.059147][ T377] ? vsprintf+0x40/0x40
[ 20.063669][ T377] device_add_disk+0x2a/0x40
[ 20.068687][ T377] loop_add+0x58f/0x760
[ 20.072852][ T377] loop_control_ioctl+0x564/0x740
[ 20.077866][ T377] ? loop_remove+0xb0/0xb0
[ 20.082286][ T377] ? _raw_spin_unlock_irq+0x4e/0x70
[ 20.087500][ T377] ? ptrace_notify+0x248/0x340
[ 20.092265][ T377] ? do_notify_parent+0xa60/0xa60
[ 20.097287][ T377] ? __fpregs_load_activate+0x1e7/0x370
[ 20.102834][ T377] ? security_file_ioctl+0xb1/0xd0
[ 20.107967][ T377] ? loop_remove+0xb0/0xb0
[ 20.112384][ T377] __se_sys_ioctl+0x115/0x190
[ 20.117053][ T377] __x64_sys_ioctl+0x7b/0x90
[ 20.121647][ T377] do_syscall_64+0x34/0x70
[ 20.126067][ T377] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 20.131972][ T377] RIP: 0033:0x7f2f549ea069
[ 20.136383][ T377] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 20.156025][ T377] RSP: 002b:00007fff079fce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 20.164450][ T377] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f2f549ea069
[ 20.172462][ T377] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003
[ 20.180441][ T377] RBP: 00007fff079fce30 R08: 0000000000000002 R09: 0000000000000001
[ 20.188418][ T377] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
[ 20.196754][ T377] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
[ 20.204727][ T377] ---[ end trace cef4e3ded1c001c6 ]---
[ 20.210158][ T377] ------------[ cut here ]------------
[ 20.215870][ T377] kernfs: can not remove 'events', no directory
[ 20.222232][ T377] WARNING: CPU: 0 PID: 377 at fs/kernfs/dir.c:1508 kernfs_remove_by_name_ns+0x65/0x90
[ 20.231762][ T377] Modules linked in:
[ 20.235651][ T377] CPU: 0 PID: 377 Comm: syz-executor342 Tainted: G W 5.10.117-syzkaller-00813-g0974b8411a58 #0
[ 20.247272][ T377] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 20.257343][ T377] RIP: 0010:kernfs_remove_by_name_ns+0x65/0x90
[ 20.263522][ T377] Code: 48 89 c3 e8 fd 4e 9b ff 48 89 df e8 c5 ee ff ff 31 db eb 29 e8 ec 4e 9b ff 48 c7 c7 c0 08 2d 85 4c 89 fe 31 c0 e8 3b 89 6d ff <0f> 0b bb fe ff ff ff eb 16 e8 cd 4e 9b ff bb fe ff ff ff 48 c7 c7
[ 20.283136][ T377] RSP: 0018:ffffc900009dfab8 EFLAGS: 00010246
[ 20.289220][ T377] RAX: f5c1a4b80edf6b00 RBX: 0000000000000000 RCX: ffff8881002d2780
[ 20.297203][ T377] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
[ 20.305184][ T377] RBP: ffffc900009dfad0 R08: ffffffff8153a998 R09: ffffed103ee0a5d8
[ 20.313160][ T377] R10: ffffed103ee0a5d8 R11: 1ffff1103ee0a5d7 R12: ffffffff86539560
[ 20.321135][ T377] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff85430280
[ 20.329097][ T377] FS: 0000555555e11300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
[ 20.338061][ T377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 20.344652][ T377] CR2: 00007f2f54a199a0 CR3: 0000000105fb6000 CR4: 00000000003506b0
[ 20.352633][ T377] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 20.360765][ T377] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 20.368755][ T377] Call Trace:
[ 20.372071][ T377] sysfs_create_files+0x40a/0x4a0
[ 20.377079][ T377] ? sysfs_create_file_ns+0x2a0/0x2a0
[ 20.382452][ T377] ? __kasan_check_write+0x14/0x20
[ 20.387555][ T377] ? kobject_get+0xd2/0x120
[ 20.392171][ T377] __device_add_disk+0x9cb/0x11d0
[ 20.397194][ T377] ? device_add_disk+0x40/0x40
[ 20.401956][ T377] ? vsprintf+0x40/0x40
[ 20.406103][ T377] device_add_disk+0x2a/0x40
[ 20.410667][ T377] loop_add+0x58f/0x760
[ 20.414821][ T377] loop_control_ioctl+0x564/0x740
[ 20.419838][ T377] ? loop_remove+0xb0/0xb0
[ 20.424435][ T377] ? _raw_spin_unlock_irq+0x4e/0x70
[ 20.429628][ T377] ? ptrace_notify+0x248/0x340
[ 20.434394][ T377] ? do_notify_parent+0xa60/0xa60
[ 20.439405][ T377] ? __fpregs_load_activate+0x1e7/0x370
[ 20.444950][ T377] ? security_file_ioctl+0xb1/0xd0
[ 20.450083][ T377] ? loop_remove+0xb0/0xb0
[ 20.454504][ T377] __se_sys_ioctl+0x115/0x190
[ 20.459166][ T377] __x64_sys_ioctl+0x7b/0x90
[ 20.463772][ T377] do_syscall_64+0x34/0x70
[ 20.468178][ T377] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 20.474065][ T377] RIP: 0033:0x7f2f549ea069
[ 20.478469][ T377] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 20.498088][ T377] RSP: 002b:00007fff079fce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 20.506513][ T377] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f2f549ea069
[pid 377] ioctl(3, LOOP_CTL_ADD, 0) = 0
[ 20.514490][ T377] RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003
[ 20.522466][ T377] RBP: 00007fff079fce30 R08: 0000000000000002 R09: 0000000000000001
[ 20.530414][ T377] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
[ 20.538493][ T377] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
[ 20.546467][ T377] ---[ end trace cef4e3ded1c001c7 ]---
[ 20.551924][ T377] loop0: failed to create sysfs files for events
[ 20.558388][ T377] ------------[ cut here ]------------
[ 20.563965][ T377] kernfs: can not remove 'events', no directory
[ 20.570221][ T377] WARNING: CPU: 1 PID: 377 at fs/kernfs/dir.c:1508 kernfs_remove_by_name_ns+0x65/0x90
[ 20.579763][ T377] Modules linked in:
[ 20.583683][ T377] CPU: 1 PID: 377 Comm: syz-executor342 Tainted: G W 5.10.117-syzkaller-00813-g0974b8411a58 #0
[ 20.595388][ T377] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 20.605462][ T377] RIP: 0010:kernfs_remove_by_name_ns+0x65/0x90
[ 20.611697][ T377] Code: 48 89 c3 e8 fd 4e 9b ff 48 89 df e8 c5 ee ff ff 31 db eb 29 e8 ec 4e 9b ff 48 c7 c7 c0 08 2d 85 4c 89 fe 31 c0 e8 3b 89 6d ff <0f> 0b bb fe ff ff ff eb 16 e8 cd 4e 9b ff bb fe ff ff ff 48 c7 c7
[ 20.631311][ T377] RSP: 0018:ffffc900009dfbf8 EFLAGS: 00010246
[ 20.637552][ T377] RAX: f5c1a4b80edf6b00 RBX: 0000000000000000 RCX: ffff8881002d2780
[ 20.645542][ T377] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
[ 20.653524][ T377] RBP: ffffc900009dfc10 R08: ffffffff8153a998 R09: ffffed103ee24e83
[ 20.661509][ T377] R10: ffffed103ee24e83 R11: 1ffff1103ee24e82 R12: 0000000000000000
[ 20.669473][ T377] R13: ffffffff86539560 R14: 0000000000000000 R15: ffffffff85430280
[ 20.677459][ T377] FS: 0000555555e11300(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
[ 20.686388][ T377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 20.692983][ T377] CR2: 00007fff079fcdf8 CR3: 0000000105fb6000 CR4: 00000000003506a0
[ 20.700946][ T377] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 20.708933][ T377] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 20.716925][ T377] Call Trace:
[ 20.720200][ T377] sysfs_remove_files+0xab/0x110
[ 20.725144][ T377] del_gendisk+0x278/0xe20
[ 20.729551][ T377] ? device_add_disk_no_queue_reg+0x30/0x30
[ 20.735461][ T377] ? __radix_tree_delete+0x2ba/0x380
[ 20.740735][ T377] ? radix_tree_delete_item+0x261/0x360
[ 20.746300][ T377] loop_remove+0x46/0xb0
[ 20.750531][ T377] loop_control_ioctl+0x67f/0x740
[ 20.755563][ T377] ? loop_remove+0xb0/0xb0
[ 20.759970][ T377] ? _raw_spin_unlock_irq+0x4e/0x70
[ 20.765186][ T377] ? ptrace_notify+0x248/0x340
[ 20.770213][ T377] ? do_notify_parent+0xa60/0xa60
[ 20.775246][ T377] ? __fpregs_load_activate+0x1e7/0x370
[ 20.780782][ T377] ? security_file_ioctl+0xb1/0xd0
[ 20.785899][ T377] ? loop_remove+0xb0/0xb0
[ 20.790306][ T377] __se_sys_ioctl+0x115/0x190
[ 20.795000][ T377] __x64_sys_ioctl+0x7b/0x90
[ 20.799590][ T377] do_syscall_64+0x34/0x70
[ 20.804020][ T377] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 20.809903][ T377] RIP: 0033:0x7f2f549ea069
[ 20.814437][ T377] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 20.834049][ T377] RSP: 002b:00007fff079fce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 20.842469][ T377] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f2f549ea069
[ 20.850440][ T377] RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003
[ 20.858443][ T377] RBP: 00007fff079fce30 R08: 0000000000000001 R09: 0000000000000001
[ 20.866424][ T377] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000004
[ 20.874409][ T377] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
[ 20.882381][ T377] ---[ end trace cef4e3ded1c001c8 ]---
[ 20.887808][ T377] ------------[ cut here ]------------
[ 20.893284][ T377] kernfs: can not remove 'events_async', no directory
[ 20.900126][ T377] WARNING: CPU: 1 PID: 377 at fs/kernfs/dir.c:1508 kernfs_remove_by_name_ns+0x65/0x90
[ 20.909690][ T377] Modules linked in:
[ 20.913598][ T377] CPU: 1 PID: 377 Comm: syz-executor342 Tainted: G W 5.10.117-syzkaller-00813-g0974b8411a58 #0
[ 20.925240][ T377] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 20.935310][ T377] RIP: 0010:kernfs_remove_by_name_ns+0x65/0x90
[ 20.941472][ T377] Code: 48 89 c3 e8 fd 4e 9b ff 48 89 df e8 c5 ee ff ff 31 db eb 29 e8 ec 4e 9b ff 48 c7 c7 c0 08 2d 85 4c 89 fe 31 c0 e8 3b 89 6d ff <0f> 0b bb fe ff ff ff eb 16 e8 cd 4e 9b ff bb fe ff ff ff 48 c7 c7
[ 20.961096][ T377] RSP: 0018:ffffc900009dfbf8 EFLAGS: 00010246
[ 20.967145][ T377] RAX: f5c1a4b80edf6b00 RBX: 0000000000000000 RCX: ffff8881002d2780
[ 20.975129][ T377] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
[ 20.983100][ T377] RBP: ffffc900009dfc10 R08: ffffffff8153a998 R09: ffffed103ee2a5d8
[ 20.991044][ T377] R10: ffffed103ee2a5d8 R11: 1ffff1103ee2a5d7 R12: 0000000000000000
[ 20.999031][ T377] R13: ffffffff86539560 R14: 0000000000000000 R15: ffffffff85430360
[ 21.006998][ T377] FS: 0000555555e11300(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
[ 21.015924][ T377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 21.022507][ T377] CR2: 00007fff079fcdf8 CR3: 0000000105fb6000 CR4: 00000000003506a0
[ 21.030465][ T377] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 21.038446][ T377] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 21.046411][ T377] Call Trace:
[ 21.049692][ T377] sysfs_remove_files+0xab/0x110
[ 21.054651][ T377] del_gendisk+0x278/0xe20
[ 21.059059][ T377] ? device_add_disk_no_queue_reg+0x30/0x30
[ 21.064951][ T377] ? __radix_tree_delete+0x2ba/0x380
[ 21.070227][ T377] ? radix_tree_delete_item+0x261/0x360
[ 21.075775][ T377] loop_remove+0x46/0xb0
[ 21.079999][ T377] loop_control_ioctl+0x67f/0x740
[ 21.085034][ T377] ? loop_remove+0xb0/0xb0
[ 21.089443][ T377] ? _raw_spin_unlock_irq+0x4e/0x70
[ 21.094641][ T377] ? ptrace_notify+0x248/0x340
[ 21.099393][ T377] ? do_notify_parent+0xa60/0xa60
[ 21.104419][ T377] ? __fpregs_load_activate+0x1e7/0x370
[ 21.109952][ T377] ? security_file_ioctl+0xb1/0xd0
[ 21.115225][ T377] ? loop_remove+0xb0/0xb0
[ 21.119627][ T377] __se_sys_ioctl+0x115/0x190
[ 21.124304][ T377] __x64_sys_ioctl+0x7b/0x90
[ 21.128883][ T377] do_syscall_64+0x34/0x70
[ 21.133301][ T377] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 21.139178][ T377] RIP: 0033:0x7f2f549ea069
[ 21.143595][ T377] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 21.163213][ T377] RSP: 002b:00007fff079fce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 21.171630][ T377] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f2f549ea069
[ 21.179587][ T377] RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003
[ 21.187563][ T377] RBP: 00007fff079fce30 R08: 0000000000000001 R09: 0000000000000001
[ 21.195535][ T377] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000004
[ 21.203520][ T377] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
[ 21.211489][ T377] ---[ end trace cef4e3ded1c001c9 ]---
[ 21.216917][ T377] ------------[ cut here ]------------
[ 21.222370][ T377] kernfs: can not remove 'events_poll_msecs', no directory
[ 21.229588][ T377] WARNING: CPU: 1 PID: 377 at fs/kernfs/dir.c:1508 kernfs_remove_by_name_ns+0x65/0x90
[ 21.239124][ T377] Modules linked in:
[ 21.243031][ T377] CPU: 1 PID: 377 Comm: syz-executor342 Tainted: G W 5.10.117-syzkaller-00813-g0974b8411a58 #0
[ 21.254649][ T377] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 21.264714][ T377] RIP: 0010:kernfs_remove_by_name_ns+0x65/0x90
[ 21.270840][ T377] Code: 48 89 c3 e8 fd 4e 9b ff 48 89 df e8 c5 ee ff ff 31 db eb 29 e8 ec 4e 9b ff 48 c7 c7 c0 08 2d 85 4c 89 fe 31 c0 e8 3b 89 6d ff <0f> 0b bb fe ff ff ff eb 16 e8 cd 4e 9b ff bb fe ff ff ff 48 c7 c7
[ 21.290453][ T377] RSP: 0018:ffffc900009dfbf8 EFLAGS: 00010246
[ 21.296556][ T377] RAX: f5c1a4b80edf6b00 RBX: 0000000000000000 RCX: ffff8881002d2780
[ 21.304539][ T377] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
[ 21.312513][ T377] RBP: ffffc900009dfc10 R08: ffffffff8153a998 R09: ffffed103ee2a5d8
[ 21.320469][ T377] R10: ffffed103ee2a5d8 R11: 1ffff1103ee2a5d7 R12: 0000000000000000
[ 21.328473][ T377] R13: ffffffff86539560 R14: 0000000000000000 R15: ffffffff854303c0
[ 21.336472][ T377] FS: 0000555555e11300(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
[ 21.345510][ T377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 21.352089][ T377] CR2: 00007fff079fcdf8 CR3: 0000000105fb6000 CR4: 00000000003506a0
[ 21.360046][ T377] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 21.368107][ T377] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 21.376077][ T377] Call Trace:
[ 21.379343][ T377] sysfs_remove_files+0xab/0x110
[ 21.384287][ T377] del_gendisk+0x278/0xe20
[ 21.388697][ T377] ? device_add_disk_no_queue_reg+0x30/0x30
[ 21.394596][ T377] ? __radix_tree_delete+0x2ba/0x380
[ 21.399884][ T377] ? radix_tree_delete_item+0x261/0x360
[ 21.405447][ T377] loop_remove+0x46/0xb0
[ 21.409684][ T377] loop_control_ioctl+0x67f/0x740
[ 21.414715][ T377] ? loop_remove+0xb0/0xb0
[ 21.419124][ T377] ? _raw_spin_unlock_irq+0x4e/0x70
[ 21.424338][ T377] ? ptrace_notify+0x248/0x340
[ 21.429125][ T377] ? do_notify_parent+0xa60/0xa60
[ 21.434160][ T377] ? __fpregs_load_activate+0x1e7/0x370
[ 21.439696][ T377] ? security_file_ioctl+0xb1/0xd0
[ 21.444940][ T377] ? loop_remove+0xb0/0xb0
[ 21.449359][ T377] __se_sys_ioctl+0x115/0x190
[ 21.454071][ T377] __x64_sys_ioctl+0x7b/0x90
[ 21.458656][ T377] do_syscall_64+0x34/0x70
[ 21.463087][ T377] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 21.469058][ T377] RIP: 0033:0x7f2f549ea069
[ 21.473489][ T377] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 21.493097][ T377] RSP: 002b:00007fff079fce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 21.501521][ T377] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f2f549ea069
[ 21.509487][ T377] RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003
[ 21.517466][ T377] RBP: 00007fff079fce30 R08: 0000000000000001 R09: 0000000000000001
[ 21.525457][ T377] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000004
[ 21.533443][ T377] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
[ 21.541503][ T377] ---[ end trace cef4e3ded1c001ca ]---
[ 21.546975][ T377] ------------[ cut here ]------------
[ 21.552439][ T377] kernfs: can not remove 'bdi', no directory
[ 21.558446][ T377] WARNING: CPU: 1 PID: 377 at fs/kernfs/dir.c:1508 kernfs_remove_by_name_ns+0x65/0x90
[ 21.568357][ T377] Modules linked in:
[ 21.572270][ T377] CPU: 1 PID: 377 Comm: syz-executor342 Tainted: G W 5.10.117-syzkaller-00813-g0974b8411a58 #0
[ 21.583975][ T377] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 21.594060][ T377] RIP: 0010:kernfs_remove_by_name_ns+0x65/0x90
[ 21.600190][ T377] Code: 48 89 c3 e8 fd 4e 9b ff 48 89 df e8 c5 ee ff ff 31 db eb 29 e8 ec 4e 9b ff 48 c7 c7 c0 08 2d 85 4c 89 fe 31 c0 e8 3b 89 6d ff <0f> 0b bb fe ff ff ff eb 16 e8 cd 4e 9b ff bb fe ff ff ff 48 c7 c7
[ 21.619805][ T377] RSP: 0018:ffffc900009dfc18 EFLAGS: 00010246
[ 21.625984][ T377] RAX: f5c1a4b80edf6b00 RBX: 0000000000000000 RCX: ffff8881002d2780
[ 21.634068][ T377] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
[ 21.642038][ T377] RBP: ffffc900009dfc30 R08: ffffffff8153a998 R09: ffffed103ee2a5d8
[ 21.650074][ T377] R10: ffffed103ee2a5d8 R11: 1ffff1103ee2a5d7 R12: 0000000000000240
[ 21.658056][ T377] R13: ffff8881057ec030 R14: 0000000000000000 R15: ffffffff8542fc60
[ 21.666074][ T377] FS: 0000555555e11300(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
[ 21.675037][ T377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 21.681618][ T377] CR2: 00007fff079fcdf8 CR3: 0000000105fb6000 CR4: 00000000003506a0
[ 21.689618][ T377] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 21.697594][ T377] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 21.705647][ T377] Call Trace:
[ 21.708927][ T377] sysfs_remove_link+0x50/0x60
[ 21.713699][ T377] del_gendisk+0x7cd/0xe20
[ 21.718121][ T377] ? device_add_disk_no_queue_reg+0x30/0x30
[ 21.724021][ T377] ? __radix_tree_delete+0x2ba/0x380
[ 21.729298][ T377] ? radix_tree_delete_item+0x261/0x360
[ 21.734841][ T377] loop_remove+0x46/0xb0
[ 21.739073][ T377] loop_control_ioctl+0x67f/0x740
[ 21.744104][ T377] ? loop_remove+0xb0/0xb0
[ 21.748510][ T377] ? _raw_spin_unlock_irq+0x4e/0x70
[ 21.753708][ T377] ? ptrace_notify+0x248/0x340
[ 21.758458][ T377] ? do_notify_parent+0xa60/0xa60
[ 21.763493][ T377] ? __fpregs_load_activate+0x1e7/0x370
[ 21.769027][ T377] ? security_file_ioctl+0xb1/0xd0
[ 21.774160][ T377] ? loop_remove+0xb0/0xb0
[ 21.778562][ T377] __se_sys_ioctl+0x115/0x190
[ 21.783237][ T377] __x64_sys_ioctl+0x7b/0x90
[ 21.787818][ T377] do_syscall_64+0x34/0x70
[ 21.792235][ T377] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 21.798116][ T377] RIP: 0033:0x7f2f549ea069
[ 21.802533][ T377] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 21.822146][ T377] RSP: 002b:00007fff079fce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 21.830538][ T377] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f2f549ea069
[ 21.838529][ T377] RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003
[ 21.846500][ T377] RBP: 00007fff079fce30 R08: 0000000000000001 R09: 0000000000000001
[ 21.854474][ T377] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000004
[ 21.862445][ T377] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
[ 21.870394][ T377] ---[ end trace cef4e3ded1c001cb ]---
[ 21.876549][ T377] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
[ 21.888254][ T377] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
[ 21.896642][ T377] CPU: 1 PID: 377 Comm: syz-executor342 Tainted: G W 5.10.117-syzkaller-00813-g0974b8411a58 #0
[ 21.908233][ T377] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 21.918271][ T377] RIP: 0010:strlen+0x3a/0x80
[ 21.922832][ T377] Code: c0 ff ff ff ff 49 bf 00 00 00 00 00 fc ff df 48 89 fb 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 49 89 c4 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 12 48 ff c3 49 8d 44 24 01 43 80 7c 26 01
[ 21.942410][ T377] RSP: 0018:ffffc900009dfb68 EFLAGS: 00010246
[ 21.948451][ T377] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881002d2780
[ 21.956398][ T377] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 21.964342][ T377] RBP: ffffc900009dfb88 R08: ffffffff81d1390c R09: fffff5200013bf75
[ 21.972288][ T377] R10: fffff5200013bf75 R11: 1ffff9200013bf74 R12: ffffffffffffffff
[ 21.980229][ T377] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[ 21.988174][ T377] FS: 0000555555e11300(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
[ 21.997072][ T377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 22.003629][ T377] CR2: 00007fff079fcdf8 CR3: 0000000105fb6000 CR4: 00000000003506a0
[ 22.011577][ T377] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 22.019523][ T377] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 22.027462][ T377] Call Trace:
[ 22.030725][ T377] kernfs_name_hash+0x21/0x240
[ 22.035459][ T377] kernfs_find_ns+0x72/0x280
[ 22.040029][ T377] kernfs_remove_by_name_ns+0x36/0x90
[ 22.045381][ T377] sysfs_remove_link+0x50/0x60
[ 22.050126][ T377] del_gendisk+0xbe0/0xe20
[ 22.054524][ T377] ? device_add_disk_no_queue_reg+0x30/0x30
[ 22.060398][ T377] ? __radix_tree_delete+0x2ba/0x380
[ 22.065652][ T377] ? radix_tree_delete_item+0x261/0x360
[ 22.071168][ T377] loop_remove+0x46/0xb0
[ 22.075381][ T377] loop_control_ioctl+0x67f/0x740
[ 22.080378][ T377] ? loop_remove+0xb0/0xb0
[ 22.084763][ T377] ? _raw_spin_unlock_irq+0x4e/0x70
[ 22.089932][ T377] ? ptrace_notify+0x248/0x340
[ 22.094753][ T377] ? do_notify_parent+0xa60/0xa60
[ 22.099749][ T377] ? __fpregs_load_activate+0x1e7/0x370
[ 22.105265][ T377] ? security_file_ioctl+0xb1/0xd0
[ 22.110348][ T377] ? loop_remove+0xb0/0xb0
[ 22.114737][ T377] __se_sys_ioctl+0x115/0x190
[ 22.119387][ T377] __x64_sys_ioctl+0x7b/0x90
[ 22.123949][ T377] do_syscall_64+0x34/0x70
[ 22.128429][ T377] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 22.134292][ T377] RIP: 0033:0x7f2f549ea069
[ 22.138680][ T377] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 22.158258][ T377] RSP: 002b:00007fff079fce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 22.166733][ T377] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f2f549ea069
[ 22.174679][ T377] RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003
[ 22.182623][ T377] RBP: 00007fff079fce30 R08: 0000000000000001 R09: 0000000000000001
[ 22.190565][ T377] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000004
[ 22.198514][ T377] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
[ 22.206458][ T377] Modules linked in:
[ 22.210476][ T377] ---[ end trace cef4e3ded1c001cc ]---
[ 22.215971][ T377] RIP: 0010:strlen+0x3a/0x80
[ 22.220548][ T377] Code: c0 ff ff ff ff 49 bf 00 00 00 00 00 fc ff df 48 89 fb 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 49 89 c4 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 12 48 ff c3 49 8d 44 24 01 43 80 7c 26 01
[ 22.240176][ T377] RSP: 0018:ffffc900009dfb68 EFLAGS: 00010246
[ 22.246396][ T377] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881002d2780
[ 22.254378][ T377] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 22.262357][ T377] RBP: ffffc900009dfb88 R08: ffffffff81d1390c R09: fffff5200013bf75
[ 22.270308][ T377] R10: fffff5200013bf75 R11: 1ffff9200013bf74 R12: ffffffffffffffff
[ 22.278285][ T377] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[ 22.286262][ T377] FS: 0000555555e11300(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
[ 22.295194][ T377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 22.301780][ T377] CR2: 00007fff079fcdf8 CR3: 0000000105fb6000 CR4: 00000000003506a0
[ 22.309742][ T377] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 22.317737][ T377] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 22.325733][ T377] Kernel panic - not syncing: Fatal exception
[ 22.331945][ T377] Kernel Offset: disabled
[ 22.336255][ T377] Rebooting in 86400 seconds..