./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor538544888 <...> DUID 00:04:e6:d8:3e:4c:c1:15:84:42:dc:00:60:8c:e3:5f:26:b4 forked to background, child pid 4646 [ 39.708864][ T4647] 8021q: adding VLAN 0 to HW filter on device bond0 [ 39.718958][ T4647] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.252' (ECDSA) to the list of known hosts. execve("./syz-executor538544888", ["./syz-executor538544888"], 0x7ffd8735a510 /* 10 vars */) = 0 brk(NULL) = 0x555556a31000 brk(0x555556a31c40) = 0x555556a31c40 arch_prctl(ARCH_SET_FS, 0x555556a31300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor538544888", 4096) = 27 brk(0x555556a52c40) = 0x555556a52c40 brk(0x555556a53000) = 0x555556a53000 mprotect(0x7f28159a8000, 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, "/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=0x555556a315d0) = 5073 ./strace-static-x86_64: Process 5073 attached [pid 5073] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5073] setpgid(0, 0) = 0 [pid 5073] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5073] write(3, "1000", 4) = 4 [pid 5073] close(3) = 0 [pid 5073] memfd_create("syzkaller", 0) = 3 [pid 5073] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f280d4e8000 syzkaller login: [ 62.454616][ T5073] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5073 'syz-executor538' [pid 5073] 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"..., 16777216) = 16777216 [pid 5073] munmap(0x7f280d4e8000, 16777216) = 0 [pid 5073] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5073] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5073] close(3) = 0 [pid 5073] mkdir("./file0", 0777) = 0 [pid 5073] mount("/dev/loop0", "./file0", "jfs", MS_SYNCHRONOUS|MS_NODIRATIME|MS_RELATIME|MS_LAZYTIME, "") = 0 [pid 5073] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5073] chdir("./file0") = 0 [pid 5073] ioctl(4, LOOP_CLR_FD) = 0 [pid 5073] close(4) = 0 [pid 5073] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [ 62.635759][ T5073] loop0: detected capacity change from 0 to 32768 [ 62.960572][ T5073] ================================================================================ [ 62.970105][ T5073] UBSAN: shift-out-of-bounds in fs/jfs/jfs_extent.c:314:16 [ 62.977367][ T5073] shift exponent -1 is negative [ 62.982308][ T5073] CPU: 0 PID: 5073 Comm: syz-executor538 Not tainted 6.3.0-rc2-syzkaller-00363-g478a351ce0d6 #0 [ 62.992750][ T5073] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 63.002836][ T5073] Call Trace: [ 63.006132][ T5073] [ 63.009170][ T5073] dump_stack_lvl+0x1e7/0x2d0 [ 63.013883][ T5073] ? nf_tcp_handle_invalid+0x650/0x650 [ 63.019358][ T5073] ? panic+0x770/0x770 [ 63.023458][ T5073] ? extAlloc+0x10a/0x1010 [ 63.027906][ T5073] __ubsan_handle_shift_out_of_bounds+0x3c3/0x420 [ 63.034343][ T5073] ? do_raw_spin_unlock+0x13b/0x8b0 [ 63.039568][ T5073] extAlloc+0xe53/0x1010 [ 63.043850][ T5073] ? jfs_ioc_trim+0x660/0x660 [ 63.048556][ T5073] ? clear_nonspinnable+0x60/0x60 [ 63.053600][ T5073] jfs_get_block+0x41b/0xe60 [ 63.058227][ T5073] ? jfs_dirty_inode+0x240/0x240 [ 63.063216][ T5073] ? create_page_buffers+0x24e/0x4c0 [ 63.068529][ T5073] __block_write_begin_int+0x548/0x1a50 [ 63.074112][ T5073] ? jfs_dirty_inode+0x240/0x240 [ 63.079064][ T5073] ? page_zero_new_buffers+0x660/0x660 [ 63.084543][ T5073] ? PageHeadHuge+0xa5/0x1d0 [ 63.089153][ T5073] ? jfs_dirty_inode+0x240/0x240 [ 63.094107][ T5073] block_write_begin+0x9c/0x1f0 [ 63.098989][ T5073] ? jfs_write_begin+0x1a/0x70 [ 63.103771][ T5073] jfs_write_begin+0x31/0x70 [ 63.108394][ T5073] generic_perform_write+0x300/0x5e0 [ 63.113714][ T5073] ? generic_file_direct_write+0x460/0x460 [ 63.119534][ T5073] ? __file_remove_privs+0x640/0x640 [ 63.124837][ T5073] ? generic_write_checks+0x160/0x1c0 [ 63.130221][ T5073] __generic_file_write_iter+0x17a/0x400 [ 63.135875][ T5073] generic_file_write_iter+0xaf/0x310 [ 63.141259][ T5073] vfs_write+0x7b2/0xbb0 [ 63.145531][ T5073] ? file_end_write+0x250/0x250 [ 63.150423][ T5073] ? lockdep_hardirqs_on+0x98/0x140 [ 63.155635][ T5073] ? __fdget_pos+0x265/0x2f0 [ 63.160243][ T5073] ksys_write+0x1a0/0x2c0 [ 63.164600][ T5073] ? __ia32_sys_read+0x90/0x90 [ 63.169382][ T5073] ? syscall_enter_from_user_mode+0x32/0x260 [ 63.175374][ T5073] ? syscall_enter_from_user_mode+0x8c/0x260 [ 63.181387][ T5073] do_syscall_64+0x41/0xc0 [ 63.186254][ T5073] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 63.192176][ T5073] RIP: 0033:0x7f2815935279 [ 63.196773][ T5073] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 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 [ 63.216408][ T5073] RSP: 002b:00007ffe940bd7b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 63.224834][ T5073] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2815935279 [ 63.232811][ T5073] RDX: 00000000200000c7 RSI: 00000000200000c0 RDI: 0000000000000004 [ 63.240792][ T5073] RBP: 0000000000000000 R08: 00007f28159a8ec0 R09: 00007f28159a8ec0 [ 63.248769][ T5073] R10: 0000000000000002 R11: 0000000000000246 R12: 00007ffe940bd7e0 [ 63.256760][ T5073] R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000 [ 63.264751][ T5073] [ 63.268333][ T5073] ================================================================================ [ 63.277746][ T5073] Kernel panic - not syncing: UBSAN: panic_on_warn set ... [ 63.284950][ T5073] CPU: 0 PID: 5073 Comm: syz-executor538 Not tainted 6.3.0-rc2-syzkaller-00363-g478a351ce0d6 #0 [ 63.295368][ T5073] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 63.305431][ T5073] Call Trace: [ 63.308716][ T5073] [ 63.311652][ T5073] dump_stack_lvl+0x1e7/0x2d0 [ 63.316351][ T5073] ? nf_tcp_handle_invalid+0x650/0x650 [ 63.321834][ T5073] ? panic+0x770/0x770 [ 63.325918][ T5073] ? tick_nohz_tick_stopped+0x7b/0xb0 [ 63.331302][ T5073] ? __irq_work_queue_local+0x122/0x180 [ 63.336875][ T5073] ? vscnprintf+0x5d/0x80 [ 63.341233][ T5073] panic+0x31c/0x770 [ 63.345159][ T5073] ? check_panic_on_warn+0x21/0xa0 [ 63.350282][ T5073] ? memcpy_page_flushcache+0x100/0x100 [ 63.355837][ T5073] ? dump_stack_lvl+0x253/0x2d0 [ 63.360724][ T5073] check_panic_on_warn+0x82/0xa0 [ 63.365852][ T5073] __ubsan_handle_shift_out_of_bounds+0x3e2/0x420 [ 63.372292][ T5073] ? do_raw_spin_unlock+0x13b/0x8b0 [ 63.377510][ T5073] extAlloc+0xe53/0x1010 [ 63.381778][ T5073] ? jfs_ioc_trim+0x660/0x660 [ 63.386463][ T5073] ? clear_nonspinnable+0x60/0x60 [ 63.391511][ T5073] jfs_get_block+0x41b/0xe60 [ 63.396128][ T5073] ? jfs_dirty_inode+0x240/0x240 [ 63.401089][ T5073] ? create_page_buffers+0x24e/0x4c0 [ 63.406425][ T5073] __block_write_begin_int+0x548/0x1a50 [ 63.412007][ T5073] ? jfs_dirty_inode+0x240/0x240 [ 63.416959][ T5073] ? page_zero_new_buffers+0x660/0x660 [ 63.422434][ T5073] ? PageHeadHuge+0xa5/0x1d0 [ 63.427045][ T5073] ? jfs_dirty_inode+0x240/0x240 [ 63.431995][ T5073] block_write_begin+0x9c/0x1f0 [ 63.436882][ T5073] ? jfs_write_begin+0x1a/0x70 [ 63.441665][ T5073] jfs_write_begin+0x31/0x70 [ 63.446271][ T5073] generic_perform_write+0x300/0x5e0 [ 63.451581][ T5073] ? generic_file_direct_write+0x460/0x460 [ 63.457419][ T5073] ? __file_remove_privs+0x640/0x640 [ 63.462718][ T5073] ? generic_write_checks+0x160/0x1c0 [ 63.468141][ T5073] __generic_file_write_iter+0x17a/0x400 [ 63.473803][ T5073] generic_file_write_iter+0xaf/0x310 [ 63.479189][ T5073] vfs_write+0x7b2/0xbb0 [ 63.483458][ T5073] ? file_end_write+0x250/0x250 [ 63.488342][ T5073] ? lockdep_hardirqs_on+0x98/0x140 [ 63.493571][ T5073] ? __fdget_pos+0x265/0x2f0 [ 63.498177][ T5073] ksys_write+0x1a0/0x2c0 [ 63.502527][ T5073] ? __ia32_sys_read+0x90/0x90 [ 63.507325][ T5073] ? syscall_enter_from_user_mode+0x32/0x260 [ 63.513318][ T5073] ? syscall_enter_from_user_mode+0x8c/0x260 [ 63.519322][ T5073] do_syscall_64+0x41/0xc0 [ 63.523754][ T5073] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 63.529661][ T5073] RIP: 0033:0x7f2815935279 [ 63.534082][ T5073] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 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 [ 63.553695][ T5073] RSP: 002b:00007ffe940bd7b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 63.562118][ T5073] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2815935279 [ 63.570095][ T5073] RDX: 00000000200000c7 RSI: 00000000200000c0 RDI: 0000000000000004 [ 63.578070][ T5073] RBP: 0000000000000000 R08: 00007f28159a8ec0 R09: 00007f28159a8ec0 [ 63.586046][ T5073] R10: 0000000000000002 R11: 0000000000000246 R12: 00007ffe940bd7e0 [ 63.594038][ T5073] R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000 [ 63.602030][ T5073] [ 63.605266][ T5073] Kernel Offset: disabled [ 63.609683][ T5073] Rebooting in 86400 seconds..