./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1761103199
<...>
forked to background, child pid 4643
no interfaces have a carrier
[ 27.750459][ T4644] 8021q: adding VLAN 0 to HW filter on device bond0
[ 27.761802][ T4644] eql: remember to turn off Van-Jacobson compression on your slave devices
Starting sshd: OK
syzkaller
Warning: Permanently added '10.128.1.89' (ECDSA) to the list of known hosts.
execve("./syz-executor1761103199", ["./syz-executor1761103199"], 0x7ffc03e876d0 /* 10 vars */) = 0
brk(NULL) = 0x555556045000
brk(0x555556045c40) = 0x555556045c40
arch_prctl(ARCH_SET_FS, 0x555556045300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
readlink("/proc/self/exe", "/root/syz-executor1761103199", 4096) = 28
brk(0x555556066c40) = 0x555556066c40
brk(0x555556067000) = 0x555556067000
mprotect(0x7f8a85b21000, 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
getpid() = 5064
mkdir("./syzkaller.PI34W8", 0700) = 0
chmod("./syzkaller.PI34W8", 0777) = 0
chdir("./syzkaller.PI34W8") = 0
mkdir("./0", 0777) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560455d0) = 5065
./strace-static-x86_64: Process 5065 attached
[pid 5065] chdir("./0") = 0
[pid 5065] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5065] setpgid(0, 0) = 0
[pid 5065] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5065] write(3, "1000", 4) = 4
[pid 5065] close(3) = 0
[pid 5065] symlink("/dev/binderfs", "./binderfs") = 0
[pid 5065] memfd_create("syzkaller", 0) = 3
[pid 5065] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8a7d665000
[pid 5065] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576
[pid 5065] munmap(0x7f8a7d665000, 1048576) = 0
[pid 5065] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5065] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5065] close(3) = 0
[pid 5065] mkdir("./file0", 0777) = 0
[pid 5065] mount("/dev/loop0", "./file0", "udf", MS_NOEXEC, "fileset=00000000000000065537,iocharset=cp874,nostrict,nostrict,noadinicb,longad,lastblock=0000000000"...) = 0
[pid 5065] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5065] chdir("./file0") = 0
[pid 5065] ioctl(4, LOOP_CLR_FD) = 0
[pid 5065] close(4) = 0
syzkaller login: [ 46.762487][ T5065] loop0: detected capacity change from 0 to 2048
[ 46.777202][ T5065] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
[pid 5065] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4
[pid 5065] mount("/dev/loop0", "./bus", NULL, MS_BIND|MS_STRICTATIME, NULL) = 0
[pid 5065] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5
[pid 5065] openat(-1, "/proc/self/exe", O_RDONLY) = 6
[pid 5065] sendfile(5, 6, NULL, 140737974943952) = 851968
[ 46.804791][ T27] audit: type=1800 audit(1671400484.888:2): pid=5065 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed(directio) comm="syz-executor176" name="bus" dev="loop0" ino=1367 res=0 errno=0
[pid 5065] exit_group(0) = ?
[pid 5065] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5065, si_uid=0, si_status=0, si_utime=0, si_stime=9 /* 0.09 s */} ---
umount2("./0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
getdents64(3, 0x555556046620 /* 4 entries */, 32768) = 112
umount2("./0/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument)
lstat("./0/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0
unlink("./0/binderfs") = 0
[ 46.889203][ T5064] ==================================================================
[ 46.897284][ T5064] BUG: KASAN: use-after-free in crc_itu_t+0xd2/0xe0
[ 46.903880][ T5064] Read of size 1 at addr ffff88807374f000 by task syz-executor176/5064
[ 46.912100][ T5064]
[ 46.914404][ T5064] CPU: 1 PID: 5064 Comm: syz-executor176 Not tainted 6.1.0-syzkaller-13139-gf9ff5644bcc0 #0
[ 46.924631][ T5064] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
[ 46.934677][ T5064] Call Trace:
[ 46.937941][ T5064]
[ 46.940850][ T5064] dump_stack_lvl+0xd1/0x138
[ 46.945434][ T5064] print_report+0x15e/0x45d
[ 46.949924][ T5064] ? __phys_addr+0xc8/0x140
[ 46.954701][ T5064] ? crc_itu_t+0xd2/0xe0
[ 46.958942][ T5064] kasan_report+0xbf/0x1f0
[ 46.963695][ T5064] ? crc_itu_t+0xd2/0xe0
[ 46.967925][ T5064] crc_itu_t+0xd2/0xe0
[ 46.971977][ T5064] udf_finalize_lvid+0xe0/0x1d0
[ 46.976808][ T5064] ? udf_mount+0x40/0x40
[ 46.981636][ T5064] ? get_nr_dirty_inodes+0x11e/0x1b0
[ 46.986907][ T5064] udf_sync_fs+0xea/0x150
[ 46.991227][ T5064] ? udf_finalize_lvid+0x1d0/0x1d0
[ 46.996319][ T5064] sync_filesystem.part.0+0x75/0x1d0
[ 47.001587][ T5064] sync_filesystem+0x8f/0xc0
[ 47.006173][ T5064] generic_shutdown_super+0x74/0x410
[ 47.011445][ T5064] kill_block_super+0x9b/0xf0
[ 47.016105][ T5064] deactivate_locked_super+0x98/0x160
[ 47.021549][ T5064] deactivate_super+0xb1/0xd0
[ 47.026206][ T5064] cleanup_mnt+0x2ae/0x3d0
[ 47.030624][ T5064] task_work_run+0x16f/0x270
[ 47.035199][ T5064] ? task_work_cancel+0x30/0x30
[ 47.040122][ T5064] ? __x64_sys_umount+0x118/0x190
[ 47.045140][ T5064] ptrace_notify+0x118/0x140
[ 47.049710][ T5064] syscall_exit_to_user_mode_prepare+0x129/0x280
[ 47.056023][ T5064] syscall_exit_to_user_mode+0xd/0x50
[ 47.061470][ T5064] do_syscall_64+0x46/0xb0
[ 47.065876][ T5064] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 47.071747][ T5064] RIP: 0033:0x7f8a85ab3e97
[ 47.076138][ T5064] Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 47.095724][ T5064] RSP: 002b:00007ffc90adba88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
[ 47.104113][ T5064] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f8a85ab3e97
[ 47.112062][ T5064] RDX: 00007ffc90adbb49 RSI: 000000000000000a RDI: 00007ffc90adbb40
[ 47.120012][ T5064] RBP: 00007ffc90adbb40 R08: 00000000ffffffff R09: 00007ffc90adb920
[ 47.127962][ T5064] R10: 0000555556046653 R11: 0000000000000206 R12: 00007ffc90adcbb0
[ 47.135913][ T5064] R13: 00005555560465f0 R14: 00007ffc90adbab0 R15: 0000000000000001
[ 47.143864][ T5064]
[ 47.146859][ T5064]
[ 47.149154][ T5064] The buggy address belongs to the physical page:
[ 47.155539][ T5064] page:ffffea0001cdd3c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x7374f
[ 47.165666][ T5064] flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
[ 47.172753][ T5064] raw: 00fff00000000000 ffffea0001cdcb88 ffffea0001cef2c8 0000000000000000
[ 47.181311][ T5064] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
[ 47.189868][ T5064] page dumped because: kasan: bad access detected
[ 47.196256][ T5064] page_owner tracks the page as freed
[ 47.201597][ T5064] page last allocated via order 0, migratetype Movable, gfp_mask 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO), pid 4953, tgid 4953 (scp), ts 41093464908, free_ts 41193454087
[ 47.219574][ T5064] get_page_from_freelist+0x119c/0x2ce0
[ 47.225105][ T5064] __alloc_pages+0x1cb/0x5b0
[ 47.229672][ T5064] __folio_alloc+0x16/0x40
[ 47.234152][ T5064] vma_alloc_folio+0x155/0x870
[ 47.238895][ T5064] __handle_mm_fault+0x17c1/0x3c40
[ 47.243985][ T5064] handle_mm_fault+0x1b6/0x850
[ 47.248730][ T5064] do_user_addr_fault+0x475/0x1210
[ 47.253837][ T5064] exc_page_fault+0x98/0x170
[ 47.258408][ T5064] asm_exc_page_fault+0x26/0x30
[ 47.263256][ T5064] page last free stack trace:
[ 47.268006][ T5064] free_pcp_prepare+0x65c/0xc00
[ 47.272837][ T5064] free_unref_page_list+0x176/0xcd0
[ 47.278034][ T5064] release_pages+0xcb1/0x1330
[ 47.282704][ T5064] tlb_batch_pages_flush+0xa8/0x1a0
[ 47.287971][ T5064] tlb_finish_mmu+0x14b/0x7e0
[ 47.292636][ T5064] exit_mmap+0x202/0x7b0
[ 47.296856][ T5064] __mmput+0x128/0x4c0
[ 47.300900][ T5064] mmput+0x60/0x70
[ 47.304593][ T5064] do_exit+0x9ac/0x2950
[ 47.308733][ T5064] do_group_exit+0xd4/0x2a0
[ 47.313215][ T5064] __x64_sys_exit_group+0x3e/0x50
[ 47.318219][ T5064] do_syscall_64+0x39/0xb0
[ 47.322621][ T5064] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 47.328516][ T5064]
[ 47.330906][ T5064] Memory state around the buggy address:
[ 47.336957][ T5064] ffff88807374ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 47.344994][ T5064] ffff88807374ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 47.353035][ T5064] >ffff88807374f000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 47.361075][ T5064] ^
[ 47.365131][ T5064] ffff88807374f080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 47.373339][ T5064] ffff88807374f100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 47.381374][ T5064] ==================================================================
[ 47.389600][ T5064] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[ 47.396791][ T5064] CPU: 1 PID: 5064 Comm: syz-executor176 Not tainted 6.1.0-syzkaller-13139-gf9ff5644bcc0 #0
[ 47.406851][ T5064] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
[ 47.416915][ T5064] Call Trace:
[ 47.420180][ T5064]
[ 47.423094][ T5064] dump_stack_lvl+0xd1/0x138
[ 47.427685][ T5064] panic+0x2cc/0x626
[ 47.431566][ T5064] ? panic_print_sys_info.part.0+0x110/0x110
[ 47.437534][ T5064] ? preempt_schedule_thunk+0x1a/0x20
[ 47.442903][ T5064] ? preempt_schedule_common+0x59/0xc0
[ 47.448367][ T5064] check_panic_on_warn.cold+0x19/0x35
[ 47.453728][ T5064] end_report.part.0+0x36/0x73
[ 47.458481][ T5064] ? crc_itu_t+0xd2/0xe0
[ 47.462736][ T5064] kasan_report.cold+0xa/0xf
[ 47.467402][ T5064] ? crc_itu_t+0xd2/0xe0
[ 47.471640][ T5064] crc_itu_t+0xd2/0xe0
[ 47.475703][ T5064] udf_finalize_lvid+0xe0/0x1d0
[ 47.480539][ T5064] ? udf_mount+0x40/0x40
[ 47.484765][ T5064] ? get_nr_dirty_inodes+0x11e/0x1b0
[ 47.490045][ T5064] udf_sync_fs+0xea/0x150
[ 47.494726][ T5064] ? udf_finalize_lvid+0x1d0/0x1d0
[ 47.499834][ T5064] sync_filesystem.part.0+0x75/0x1d0
[ 47.505117][ T5064] sync_filesystem+0x8f/0xc0
[ 47.509696][ T5064] generic_shutdown_super+0x74/0x410
[ 47.514978][ T5064] kill_block_super+0x9b/0xf0
[ 47.519648][ T5064] deactivate_locked_super+0x98/0x160
[ 47.525012][ T5064] deactivate_super+0xb1/0xd0
[ 47.529707][ T5064] cleanup_mnt+0x2ae/0x3d0
[ 47.534114][ T5064] task_work_run+0x16f/0x270
[ 47.538714][ T5064] ? task_work_cancel+0x30/0x30
[ 47.543563][ T5064] ? __x64_sys_umount+0x118/0x190
[ 47.548581][ T5064] ptrace_notify+0x118/0x140
[ 47.553166][ T5064] syscall_exit_to_user_mode_prepare+0x129/0x280
[ 47.559493][ T5064] syscall_exit_to_user_mode+0xd/0x50
[ 47.564876][ T5064] do_syscall_64+0x46/0xb0
[ 47.569291][ T5064] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 47.575177][ T5064] RIP: 0033:0x7f8a85ab3e97
[ 47.579584][ T5064] Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 47.599187][ T5064] RSP: 002b:00007ffc90adba88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
[ 47.607591][ T5064] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f8a85ab3e97
[ 47.615551][ T5064] RDX: 00007ffc90adbb49 RSI: 000000000000000a RDI: 00007ffc90adbb40
[ 47.623511][ T5064] RBP: 00007ffc90adbb40 R08: 00000000ffffffff R09: 00007ffc90adb920
[ 47.631471][ T5064] R10: 0000555556046653 R11: 0000000000000206 R12: 00007ffc90adcbb0
[ 47.639436][ T5064] R13: 00005555560465f0 R14: 00007ffc90adbab0 R15: 0000000000000001
[ 47.647401][ T5064]
[ 47.651138][ T5064] Kernel Offset: disabled
[ 47.655451][ T5064] Rebooting in 86400 seconds..