./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1833946069 <...> Warning: Permanently added '10.128.0.171' (ED25519) to the list of known hosts. execve("./syz-executor1833946069", ["./syz-executor1833946069"], 0x7ffff0e55f20 /* 10 vars */) = 0 brk(NULL) = 0x55555732c000 brk(0x55555732cd00) = 0x55555732cd00 arch_prctl(ARCH_SET_FS, 0x55555732c380) = 0 set_tid_address(0x55555732c650) = 5004 set_robust_list(0x55555732c660, 24) = 0 rseq(0x55555732cca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1833946069", 4096) = 28 getrandom("\x95\x94\x2a\x12\xd1\x2a\xd9\x62", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555732cd00 brk(0x55555734dd00) = 0x55555734dd00 brk(0x55555734e000) = 0x55555734e000 mprotect(0x7f928fd5f000, 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./strace-static-x86_64: Process 5005 attached , child_tidptr=0x55555732c650) = 5005 [pid 5005] set_robust_list(0x55555732c660, 24) = 0 [pid 5005] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5005] setpgid(0, 0) = 0 [pid 5005] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5005] write(3, "1000", 4) = 4 [pid 5005] close(3) = 0 [pid 5005] memfd_create("syzkaller", 0) = 3 [pid 5005] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f92878ad000 [pid 5005] 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"..., 32768) = 32768 [pid 5005] munmap(0x7f92878ad000, 138412032) = 0 [pid 5005] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5005] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5005] close(3) = 0 [pid 5005] mkdir("./file0", 0777) = 0 [pid 5005] mount("/dev/loop0", "./file0", "hfs", MS_REC, "") = 0 [pid 5005] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5005] chdir("./file0") = 0 [pid 5005] ioctl(4, LOOP_CLR_FD) = 0 [pid 5005] close(4) = 0 [ 142.352988][ T5005] loop0: detected capacity change from 0 to 64 [pid 5005] open("./file1", O_RDWR|O_CREAT|O_SYNC|O_DIRECT|O_NOATIME|FASYNC, 000) = 4 [ 142.394046][ T27] audit: type=1800 audit(1703681504.178:2): pid=5005 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed(directio) comm="syz-executor183" name="file1" dev="loop0" ino=18 res=0 errno=0 [ 142.426780][ T5005] ===================================================== [ 142.434142][ T5005] BUG: KMSAN: uninit-value in hfs_find_set_zero_bits+0x836/0xc90 [ 142.442273][ T5005] hfs_find_set_zero_bits+0x836/0xc90 [ 142.447823][ T5005] hfs_vbm_search_free+0x141/0x530 [ 142.453273][ T5005] hfs_extend_file+0x69e/0x19f0 [ 142.458299][ T5005] hfs_get_block+0x3d8/0xf40 [ 142.463218][ T5005] __block_write_begin_int+0x946/0x2c70 [ 142.468930][ T5005] block_write_begin+0x143/0x450 [ 142.474215][ T5005] cont_write_begin+0xd5c/0x12f0 [ 142.479302][ T5005] hfs_write_begin+0x9a/0x130 [ 142.484265][ T5005] cont_write_begin+0x319/0x12f0 [ 142.489359][ T5005] hfs_write_begin+0x9a/0x130 [ 142.494362][ T5005] hfs_file_truncate+0x1a5/0xd20 [ 142.499472][ T5005] hfs_inode_setattr+0x998/0xaa0 [ 142.505036][ T5005] notify_change+0x19fd/0x1af0 [ 142.510033][ T5005] do_truncate+0x22a/0x2a0 [ 142.514785][ T5005] do_sys_ftruncate+0x81c/0xb30 [ 142.519802][ T5005] __x64_sys_ftruncate+0x71/0xa0 [ 142.524995][ T5005] do_syscall_64+0x44/0x110 [ 142.529665][ T5005] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 142.535892][ T5005] [ 142.538310][ T5005] Uninit was created at: [ 142.542883][ T5005] slab_post_alloc_hook+0x129/0xa70 [ 142.548214][ T5005] __kmem_cache_alloc_node+0x5c9/0x970 [ 142.553931][ T5005] kmalloc_trace+0x51/0x200 [ 142.558586][ T5005] hfs_mdb_get+0x1bd4/0x28b0 [ 142.563379][ T5005] hfs_fill_super+0x1cf5/0x23c0 [ 142.568386][ T5005] mount_bdev+0x3d7/0x560 [ 142.572952][ T5005] hfs_mount+0x4d/0x60 [ 142.577205][ T5005] legacy_get_tree+0x110/0x290 [ 142.582242][ T5005] vfs_get_tree+0xa5/0x520 [ 142.586810][ T5005] do_new_mount+0x68d/0x1550 [ 142.591671][ T5005] path_mount+0x73d/0x1f20 [ 142.596224][ T5005] __se_sys_mount+0x725/0x810 [ 142.600990][ T5005] __x64_sys_mount+0xe4/0x140 [ 142.605908][ T5005] do_syscall_64+0x44/0x110 [ 142.610563][ T5005] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 142.616727][ T5005] [ 142.619135][ T5005] CPU: 0 PID: 5005 Comm: syz-executor183 Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3 #0 [ 142.629798][ T5005] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 142.640045][ T5005] ===================================================== [ 142.647153][ T5005] Disabling lock debugging due to kernel taint [ 142.653481][ T5005] Kernel panic - not syncing: kmsan.panic set ... [ 142.659946][ T5005] CPU: 0 PID: 5005 Comm: syz-executor183 Tainted: G B 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3 #0 [ 142.671948][ T5005] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 142.682214][ T5005] Call Trace: [ 142.685590][ T5005] [ 142.688571][ T5005] dump_stack_lvl+0x1bf/0x240 [ 142.693401][ T5005] dump_stack+0x1e/0x20 [ 142.697720][ T5005] panic+0x4de/0xc90 [ 142.701818][ T5005] ? add_taint+0x108/0x1a0 [ 142.706389][ T5005] kmsan_report+0x2d0/0x2d0 [ 142.711077][ T5005] ? kmsan_internal_poison_memory+0x82/0xa0 [ 142.717160][ T5005] ? kmsan_internal_poison_memory+0x49/0xa0 [ 142.723236][ T5005] ? kmsan_slab_free+0xd1/0x130 [ 142.728259][ T5005] ? __msan_warning+0x96/0x110 [ 142.733171][ T5005] ? hfs_find_set_zero_bits+0x836/0xc90 [ 142.738825][ T5005] ? hfs_vbm_search_free+0x141/0x530 [ 142.744251][ T5005] ? hfs_extend_file+0x69e/0x19f0 [ 142.749419][ T5005] ? hfs_get_block+0x3d8/0xf40 [ 142.754326][ T5005] ? __block_write_begin_int+0x946/0x2c70 [ 142.760160][ T5005] ? block_write_begin+0x143/0x450 [ 142.765412][ T5005] ? cont_write_begin+0xd5c/0x12f0 [ 142.770631][ T5005] ? hfs_write_begin+0x9a/0x130 [ 142.775648][ T5005] ? cont_write_begin+0x319/0x12f0 [ 142.780891][ T5005] ? hfs_write_begin+0x9a/0x130 [ 142.785855][ T5005] ? hfs_file_truncate+0x1a5/0xd20 [ 142.791121][ T5005] ? hfs_inode_setattr+0x998/0xaa0 [ 142.796349][ T5005] ? notify_change+0x19fd/0x1af0 [ 142.801464][ T5005] ? do_truncate+0x22a/0x2a0 [ 142.806232][ T5005] ? do_sys_ftruncate+0x81c/0xb30 [ 142.811374][ T5005] ? __x64_sys_ftruncate+0x71/0xa0 [ 142.816661][ T5005] ? do_syscall_64+0x44/0x110 [ 142.821500][ T5005] ? entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 142.827738][ T5005] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 142.833746][ T5005] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 142.839724][ T5005] ? __hfs_brec_find+0x712/0x820 [ 142.844834][ T5005] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 142.850852][ T5005] __msan_warning+0x96/0x110 [ 142.855615][ T5005] hfs_find_set_zero_bits+0x836/0xc90 [ 142.861131][ T5005] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 142.867516][ T5005] hfs_vbm_search_free+0x141/0x530 [ 142.872757][ T5005] hfs_extend_file+0x69e/0x19f0 [ 142.877763][ T5005] ? filemap_get_folios+0x4a/0x60 [ 142.882927][ T5005] hfs_get_block+0x3d8/0xf40 [ 142.887690][ T5005] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 142.893708][ T5005] __block_write_begin_int+0x946/0x2c70 [ 142.899406][ T5005] ? __filemap_get_folio+0x1381/0x1760 [ 142.905009][ T5005] ? hfs_free_extents+0x6b0/0x6b0 [ 142.910195][ T5005] ? kmsan_get_shadow_origin_ptr+0x38/0xa0 [ 142.916143][ T5005] block_write_begin+0x143/0x450 [ 142.921219][ T5005] ? hfs_free_extents+0x6b0/0x6b0 [ 142.926371][ T5005] cont_write_begin+0xd5c/0x12f0 [ 142.931491][ T5005] hfs_write_begin+0x9a/0x130 [ 142.936276][ T5005] ? hfs_free_extents+0x6b0/0x6b0 [ 142.941420][ T5005] ? __hfs_ext_cache_extent+0x7e0/0x7e0 [ 142.947298][ T5005] cont_write_begin+0x319/0x12f0 [ 142.952369][ T5005] hfs_write_begin+0x9a/0x130 [ 142.957196][ T5005] ? hfs_free_extents+0x6b0/0x6b0 [ 142.962334][ T5005] hfs_file_truncate+0x1a5/0xd20 [ 142.967397][ T5005] ? unmap_mapping_range+0xc8/0x3f0 [ 142.972749][ T5005] hfs_inode_setattr+0x998/0xaa0 [ 142.977791][ T5005] ? hfs_evict_inode+0x140/0x140 [ 142.982855][ T5005] ? hfs_evict_inode+0x140/0x140 [ 142.987942][ T5005] notify_change+0x19fd/0x1af0 [ 142.992854][ T5005] do_truncate+0x22a/0x2a0 [ 142.997415][ T5005] do_sys_ftruncate+0x81c/0xb30 [ 143.002454][ T5005] __x64_sys_ftruncate+0x71/0xa0 [ 143.007551][ T5005] do_syscall_64+0x44/0x110 [ 143.012154][ T5005] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 143.018158][ T5005] RIP: 0033:0x7f928fcebd19 [ 143.022634][ T5005] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 b8 ff ff ff f7 d8 64 89 01 48 [ 143.042359][ T5005] RSP: 002b:00007fffe2b585f8 EFLAGS: 00000246 ORIG_RAX: 000000000000004d [ 143.050936][ T5005] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f928fcebd19 [ 143.059028][ T5005] RDX: 00007f928fcebd19 RSI: 0000000002007fff RDI: 0000000000000004 [ 143.067099][ T5005] RBP: 00007f928fd5f5f0 R08: 000055555732d4c0 R09: 000055555732d4c0 [ 143.075266][ T5005] R10: 0000000000000260 R11: 0000000000000246 R12: 00007fffe2b58620 [ 143.083389][ T5005] R13: 00007fffe2b58848 R14: 431bde82d7b634db R15: 00007f928fd3403b [ 143.091480][ T5005] [ 143.094801][ T5005] Kernel Offset: disabled [ 143.099257][ T5005] Rebooting in 86400 seconds..