./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2211841336

<...>
Warning: Permanently added '10.128.0.73' (ED25519) to the list of known hosts.
execve("./syz-executor2211841336", ["./syz-executor2211841336"], 0x7ffdde8b5ee0 /* 10 vars */) = 0
brk(NULL)                               = 0x55558beba000
brk(0x55558bebad00)                     = 0x55558bebad00
arch_prctl(ARCH_SET_FS, 0x55558beba380) = 0
set_tid_address(0x55558beba650)         = 5187
set_robust_list(0x55558beba660, 24)     = 0
rseq(0x55558bebaca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor2211841336", 4096) = 28
getrandom("\x6e\x5d\xba\x46\x28\x82\x2a\xe6", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x55558bebad00
brk(0x55558bedbd00)                     = 0x55558bedbd00
brk(0x55558bedc000)                     = 0x55558bedc000
mprotect(0x7f7ad22af000, 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=0x55558beba650) = 5188
./strace-static-x86_64: Process 5188 attached
[pid  5188] set_robust_list(0x55558beba660, 24) = 0
[pid  5188] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5188] setpgid(0, 0)               = 0
[pid  5188] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid  5188] write(3, "1000", 4)         = 4
[pid  5188] close(3)                    = 0
[pid  5188] write(1, "executing program\n", 18) = 18
[pid  5188] memfd_create("syzkaller", 0) = 3
[pid  5188] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7ac9c00000
executing program
[pid  5188] write(3, "\xeb\x76\x90\x45\x58\x46\x41\x54\x20\x20\x20\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\x01\x00\x00\x00\x00\x00\x00\x80\x00\x00\x00\x08\x00\x00\x00\x88\x00\x00\x00\x0f\x00\x00\x00\x05\x00\x00\x00"..., 131072) = 131072
[pid  5188] munmap(0x7f7ac9c00000, 138412032) = 0
[pid  5188] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5188] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5188] close(3)                    = 0
[pid  5188] close(4)                    = 0
[pid  5188] mkdir("./file0", 0777)      = 0
[  165.505881][ T5188] loop0: detected capacity change from 0 to 256
[pid  5188] mount("/dev/loop0", "./file0", "exfat", MS_NOEXEC, "") = 0
[pid  5188] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid  5188] chdir("./file0")            = 0
[pid  5188] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5188] chdir("./file0")            = 0
[pid  5188] open("./bus", O_RDWR|O_CREAT|O_NONBLOCK|O_DIRECT|O_NOFOLLOW|O_NOATIME, 020) = 4
[  165.545628][ T5188] exFAT-fs (loop0): failed to load upcase table (idx : 0x00010000, chksum : 0x726052d3, utbl_chksum : 0xe619d30d)
[  165.584706][   T29] audit: type=1800 audit(1727861761.192:2): pid=5188 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed(directio) comm="syz-executor221" name="bus" dev="loop0" ino=3 res=0 errno=0
[  165.585143][ T5188] =====================================================
[  165.612929][ T5188] BUG: KMSAN: uninit-value in __exfat_get_dentry_set+0x10ca/0x14d0
[  165.621053][ T5188]  __exfat_get_dentry_set+0x10ca/0x14d0
[  165.626905][ T5188]  exfat_get_dentry_set+0x58/0xec0
[  165.632370][ T5188]  __exfat_write_inode+0x3c1/0xe30
[  165.637753][ T5188]  __exfat_truncate+0x7f3/0xbb0
[  165.642960][ T5188]  exfat_truncate+0xee/0x2a0
[  165.647722][ T5188]  exfat_direct_IO+0x5a3/0x900
[  165.652733][ T5188]  generic_file_direct_write+0x275/0x6a0
[  165.658593][ T5188]  __generic_file_write_iter+0x242/0x460
[  165.664739][ T5188]  exfat_file_write_iter+0x894/0xfb0
[  165.670205][ T5188]  do_iter_readv_writev+0x88a/0xa30
[  165.675691][ T5188]  vfs_writev+0x56a/0x14f0
[  165.680263][ T5188]  __se_sys_pwritev2+0x280/0x470
[  165.685445][ T5188]  __x64_sys_pwritev2+0x11f/0x1a0
[  165.690647][ T5188]  x64_sys_call+0x2edb/0x3ba0
[  165.695572][ T5188]  do_syscall_64+0xcd/0x1e0
[  165.700282][ T5188]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  165.706487][ T5188] 
[  165.708882][ T5188] Uninit was stored to memory at:
[  165.714256][ T5188]  _copy_to_iter+0xe53/0x2b30
[  165.719088][ T5188]  copy_page_to_iter+0x419/0x880
[  165.724248][ T5188]  shmem_file_read_iter+0xa09/0x12b0
[  165.729733][ T5188]  do_iter_readv_writev+0x88a/0xa30
[  165.735132][ T5188]  vfs_iter_read+0x278/0x760
[  165.739886][ T5188]  loop_process_work+0x20fc/0x3750
[  165.745287][ T5188]  loop_rootcg_workfn+0x2b/0x40
[  165.750286][ T5188]  process_scheduled_works+0xae0/0x1c40
[  165.756079][ T5188]  worker_thread+0xea7/0x14f0
[  165.760926][ T5188]  kthread+0x3e2/0x540
[  165.765218][ T5188]  ret_from_fork+0x6d/0x90
[  165.769795][ T5188]  ret_from_fork_asm+0x1a/0x30
[  165.774768][ T5188] 
[  165.777171][ T5188] Uninit was stored to memory at:
[  165.782615][ T5188]  copy_page_from_iter_atomic+0x12b7/0x3100
[  165.788685][ T5188]  generic_perform_write+0x8d1/0x1080
[  165.794288][ T5188]  shmem_file_write_iter+0x2ba/0x2f0
[  165.799771][ T5188]  do_iter_readv_writev+0x88a/0xa30
[  165.805197][ T5188]  vfs_iter_write+0x44d/0xd40
[  165.810059][ T5188]  loop_process_work+0x15e6/0x3750
[  165.815404][ T5188]  loop_rootcg_workfn+0x2b/0x40
[  165.820402][ T5188]  process_scheduled_works+0xae0/0x1c40
[  165.826226][ T5188]  worker_thread+0xea7/0x14f0
[  165.831076][ T5188]  kthread+0x3e2/0x540
[  165.835341][ T5188]  ret_from_fork+0x6d/0x90
[  165.839908][ T5188]  ret_from_fork_asm+0x1a/0x30
[  165.844916][ T5188] 
[  165.847315][ T5188] Uninit was created at:
[  165.851681][ T5188]  __alloc_pages_noprof+0x9d6/0xe70
[  165.857076][ T5188]  alloc_pages_mpol_noprof+0x299/0x990
[  165.862755][ T5188]  folio_alloc_noprof+0x1db/0x310
[  165.868069][ T5188]  filemap_alloc_folio_noprof+0xa6/0x440
[  165.873969][ T5188]  __filemap_get_folio+0xac4/0x1550
[  165.879352][ T5188]  block_write_begin+0x6e/0x2b0
[  165.884426][ T5188]  exfat_write_begin+0xfb/0x400
[  165.889440][ T5188]  exfat_file_write_iter+0x474/0xfb0
[  165.894908][ T5188]  do_iter_readv_writev+0x88a/0xa30
[  165.900286][ T5188]  vfs_writev+0x56a/0x14f0
[  165.904997][ T5188]  __se_sys_pwritev2+0x280/0x470
[  165.910116][ T5188]  __x64_sys_pwritev2+0x11f/0x1a0
[  165.915339][ T5188]  x64_sys_call+0x2edb/0x3ba0
[  165.920191][ T5188]  do_syscall_64+0xcd/0x1e0
[  165.924921][ T5188]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  165.931028][ T5188] 
[  165.933580][ T5188] CPU: 0 UID: 0 PID: 5188 Comm: syz-executor221 Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0
[  165.944935][ T5188] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
[  165.955161][ T5188] =====================================================
[  165.962293][ T5188] Disabling lock debugging due to kernel taint
[  165.968531][ T5188] Kernel panic - not syncing: kmsan.panic set ...
[  165.975016][ T5188] CPU: 0 UID: 0 PID: 5188 Comm: syz-executor221 Tainted: G    B              6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0
[  165.987718][ T5188] Tainted: [B]=BAD_PAGE
[  165.991937][ T5188] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
[  166.002131][ T5188] Call Trace:
[  166.005490][ T5188]  <TASK>
[  166.008472][ T5188]  dump_stack_lvl+0x216/0x2d0
[  166.013263][ T5188]  ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[  166.019198][ T5188]  dump_stack+0x1e/0x30
[  166.023515][ T5188]  panic+0x4e2/0xcf0
[  166.027511][ T5188]  ? kmsan_get_metadata+0x41/0x1c0
[  166.032728][ T5188]  kmsan_report+0x2c7/0x2d0
[  166.037333][ T5188]  ? kmsan_get_metadata+0x13e/0x1c0
[  166.042650][ T5188]  ? __msan_warning+0x95/0x120
[  166.047536][ T5188]  ? __exfat_get_dentry_set+0x10ca/0x14d0
[  166.053400][ T5188]  ? exfat_get_dentry_set+0x58/0xec0
[  166.058921][ T5188]  ? __exfat_write_inode+0x3c1/0xe30
[  166.064327][ T5188]  ? __exfat_truncate+0x7f3/0xbb0
[  166.069502][ T5188]  ? exfat_truncate+0xee/0x2a0
[  166.074352][ T5188]  ? exfat_direct_IO+0x5a3/0x900
[  166.079391][ T5188]  ? generic_file_direct_write+0x275/0x6a0
[  166.085325][ T5188]  ? __generic_file_write_iter+0x242/0x460
[  166.091268][ T5188]  ? exfat_file_write_iter+0x894/0xfb0
[  166.096834][ T5188]  ? do_iter_readv_writev+0x88a/0xa30
[  166.102330][ T5188]  ? vfs_writev+0x56a/0x14f0
[  166.107014][ T5188]  ? __se_sys_pwritev2+0x280/0x470
[  166.112270][ T5188]  ? __x64_sys_pwritev2+0x11f/0x1a0
[  166.117583][ T5188]  ? x64_sys_call+0x2edb/0x3ba0
[  166.122552][ T5188]  ? do_syscall_64+0xcd/0x1e0
[  166.127340][ T5188]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  166.133554][ T5188]  ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[  166.139458][ T5188]  ? __wait_on_bit+0x1f8/0x4b0
[  166.144319][ T5188]  ? __pfx_bit_wait_io+0x10/0x10
[  166.149348][ T5188]  ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[  166.155274][ T5188]  ? out_of_line_wait_on_bit+0x13c/0x170
[  166.161008][ T5188]  ? __pfx_wake_bit_function+0x10/0x10
[  166.166575][ T5188]  ? __pfx_bit_wait_io+0x10/0x10
[  166.171603][ T5188]  ? kmsan_get_metadata+0x13e/0x1c0
[  166.176914][ T5188]  ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[  166.182875][ T5188]  __msan_warning+0x95/0x120
[  166.187603][ T5188]  __exfat_get_dentry_set+0x10ca/0x14d0
[  166.193345][ T5188]  ? kmsan_get_metadata+0x13e/0x1c0
[  166.198653][ T5188]  exfat_get_dentry_set+0x58/0xec0
[  166.203953][ T5188]  ? exfat_set_volume_dirty+0x15e/0x490
[  166.209626][ T5188]  ? kmsan_get_metadata+0x13e/0x1c0
[  166.214921][ T5188]  ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[  166.220827][ T5188]  __exfat_write_inode+0x3c1/0xe30
[  166.226049][ T5188]  ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[  166.231978][ T5188]  ? inode_needs_sync+0x130/0x2c0
[  166.237155][ T5188]  __exfat_truncate+0x7f3/0xbb0
[  166.242138][ T5188]  ? kmsan_get_shadow_origin_ptr+0x3/0xb0
[  166.248036][ T5188]  exfat_truncate+0xee/0x2a0
[  166.252723][ T5188]  exfat_direct_IO+0x5a3/0x900
[  166.257601][ T5188]  ? __pfx_exfat_direct_IO+0x10/0x10
[  166.262995][ T5188]  generic_file_direct_write+0x275/0x6a0
[  166.268770][ T5188]  __generic_file_write_iter+0x242/0x460
[  166.274534][ T5188]  exfat_file_write_iter+0x894/0xfb0
[  166.279918][ T5188]  ? __pfx_exfat_write_end+0x10/0x10
[  166.285326][ T5188]  ? __pfx_exfat_file_write_iter+0x10/0x10
[  166.291230][ T5188]  do_iter_readv_writev+0x88a/0xa30
[  166.296547][ T5188]  ? kmsan_get_metadata+0x13e/0x1c0
[  166.301835][ T5188]  ? __pfx_exfat_file_write_iter+0x10/0x10
[  166.307776][ T5188]  ? __pfx_exfat_file_write_iter+0x10/0x10
[  166.313683][ T5188]  vfs_writev+0x56a/0x14f0
[  166.318180][ T5188]  ? kmsan_get_metadata+0x13e/0x1c0
[  166.323503][ T5188]  ? __traceiter_rdev_dump_survey+0x40/0x160
[  166.329671][ T5188]  ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[  166.335569][ T5188]  ? kmsan_get_metadata+0x13e/0x1c0
[  166.340854][ T5188]  ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[  166.346772][ T5188]  __se_sys_pwritev2+0x280/0x470
[  166.351833][ T5188]  __x64_sys_pwritev2+0x11f/0x1a0
[  166.357054][ T5188]  x64_sys_call+0x2edb/0x3ba0
[  166.361918][ T5188]  do_syscall_64+0xcd/0x1e0
[  166.366589][ T5188]  ? clear_bhb_loop+0x25/0x80
[  166.371356][ T5188]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  166.377387][ T5188] RIP: 0033:0x7f7ad223aad9
[  166.381878][ T5188] 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
[  166.401700][ T5188] RSP: 002b:00007ffeb141c358 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
[  166.410283][ T5188] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f7ad223aad9
[  166.418337][ T5188] RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000004
[  166.426385][ T5188] RBP: 00007f7ad22af5f0 R08: 0000000000000000 R09: 0000000000000000
[  166.434431][ T5188] R10: 0000000000000030 R11: 0000000000000246 R12: 00007ffeb141c390
[  166.442479][ T5188] R13: 00007ffeb141c5b8 R14: 431bde82d7b634db R15: 00007f7ad228303b
[  166.450548][ T5188]  </TASK>
[  166.453902][ T5188] Kernel Offset: disabled
[  166.458287][ T5188] Rebooting in 86400 seconds..