./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4277476292
<...>
no interfaces have a carrier
[ 133.806297][ T5434] 8021q: adding VLAN 0 to HW filter on device bond0
[ 133.869513][ T5434] eql: remember to turn off Van-Jacobson compression on your slave devices
Starting sshd: [ 135.923549][ T5518] sshd (5518) used greatest stack depth: 4440 bytes left
OK
syzkaller
Warning: Permanently added '10.128.1.6' (ED25519) to the list of known hosts.
execve("./syz-executor4277476292", ["./syz-executor4277476292"], 0x7ffeaf887580 /* 10 vars */) = 0
brk(NULL) = 0x555562da7000
brk(0x555562da7d00) = 0x555562da7d00
arch_prctl(ARCH_SET_FS, 0x555562da7380) = 0
set_tid_address(0x555562da7650) = 5775
set_robust_list(0x555562da7660, 24) = 0
rseq(0x555562da7ca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor4277476292", 4096) = 28
getrandom("\x1e\x41\xc4\xa9\x7b\xac\xa2\x44", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x555562da7d00
brk(0x555562dc8d00) = 0x555562dc8d00
brk(0x555562dc9000) = 0x555562dc9000
mprotect(0x7f12eb0a5000, 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=0x555562da7650) = 5776
./strace-static-x86_64: Process 5776 attached
[pid 5776] set_robust_list(0x555562da7660, 24) = 0
[pid 5776] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5776] setpgid(0, 0) = 0
[pid 5776] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5776] write(3, "1000", 4executing program
) = 4
[pid 5776] close(3) = 0
[pid 5776] write(1, "executing program\n", 18) = 18
[pid 5776] memfd_create("syzkaller", 0) = 3
[pid 5776] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f12e2a00000
[pid 5776] 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 5776] munmap(0x7f12e2a00000, 138412032) = 0
[pid 5776] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5776] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5776] close(3) = 0
[pid 5776] close(4) = 0
[pid 5776] mkdir("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 0777) = 0
syzkaller login: [ 184.786461][ T5776] loop0: detected capacity change from 0 to 256
[pid 5776] mount("/dev/loop0", "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", "exfat", MS_NODIRATIME, "fmask=00000000000000000000002,discard,errors=remount-ro,iocharset=cp874,allow_utime=0000000000000000"...) = 0
[pid 5776] openat(AT_FDCWD, "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", O_RDONLY|O_DIRECTORY) = 3
[pid 5776] chdir("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa") = 0
[pid 5776] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid 5776] openat(AT_FDCWD, "memory.events", O_WRONLY|O_CREAT|O_EXCL|O_TRUNC|O_APPEND|FASYNC|0x20, 000) = 4
[pid 5776] openat(AT_FDCWD, "memory.events", O_WRONLY|O_TRUNC|O_NONBLOCK|O_DSYNC|O_DIRECT|FASYNC|0x4) = 5
[pid 5776] io_uring_setup(211, {flags=0, sq_thread_cpu=0, sq_thread_idle=2, sq_entries=256, cq_entries=512, features=IORING_FEAT_SINGLE_MMAP|IORING_FEAT_NODROP|IORING_FEAT_SUBMIT_STABLE|IORING_FEAT_RW_CUR_POS|IORING_FEAT_CUR_PERSONALITY|IORING_FEAT_FAST_POLL|IORING_FEAT_POLL_32BITS|IORING_FEAT_SQPOLL_NONFIXED|IORING_FEAT_EXT_ARG|IORING_FEAT_NATIVE_WORKERS|IORING_FEAT_RSRC_TAGS|IORING_FEAT_CQE_SKIP|IORING_FEAT_LINKED_FILE|0x1e000, sq_off={head=0, tail=4, ring_mask=16, ring_entries=24, flags=36, dropped=32, array=8256}, cq_off={head=8, tail=12, ring_mask=20, ring_entries=28, overflow=44, cqes=64, flags=40}}) = 6
[ 184.829185][ T5776] exFAT-fs (loop0): failed to load upcase table (idx : 0x00010000, chksum : 0x1a9973fb, utbl_chksum : 0xe619d30d)
[pid 5776] mmap(NULL, 9280, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 6, 0) = 0x7f12eafe9000
[pid 5776] mmap(NULL, 16384, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 6, 0x10000000) = 0x7f12eafe5000
[ 184.891344][ T5776] =====================================================
[ 184.899271][ T5776] BUG: KMSAN: uninit-value in iov_iter_alignment_iovec+0x1a8/0x470
[ 184.909540][ T5776] iov_iter_alignment_iovec+0x1a8/0x470
[ 184.915249][ T5776] iov_iter_alignment+0x1ac/0x2d0
[ 184.920545][ T5776] exfat_file_write_iter+0x1df/0xcb0
[ 184.926029][ T5776] io_write+0xd41/0x2380
[ 184.930526][ T5776] io_issue_sqe+0x436/0x1f60
[ 184.935326][ T5776] io_submit_sqes+0x11bc/0x2f80
[ 184.940459][ T5776] __se_sys_io_uring_enter+0x41d/0x4da0
[ 184.946180][ T5776] __x64_sys_io_uring_enter+0x11f/0x1a0
[ 184.952135][ T5776] x64_sys_call+0xce5/0x3c30
[ 184.956914][ T5776] do_syscall_64+0xcd/0x1e0
[ 184.961782][ T5776] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 184.967951][ T5776]
[ 184.970369][ T5776] Uninit was created at:
[ 184.974769][ T5776] __kmalloc_noprof+0x923/0x1230
[ 184.979934][ T5776] io_prep_rw+0x9f4/0x1300
[ 184.984534][ T5776] io_prep_rwv+0xb3/0x510
[ 184.989101][ T5776] io_prep_writev+0x3a/0x50
[ 184.993812][ T5776] io_submit_sqes+0x1082/0x2f80
[ 184.998997][ T5776] __se_sys_io_uring_enter+0x41d/0x4da0
[ 185.004715][ T5776] __x64_sys_io_uring_enter+0x11f/0x1a0
[ 185.010653][ T5776] x64_sys_call+0xce5/0x3c30
[ 185.015393][ T5776] do_syscall_64+0xcd/0x1e0
[ 185.020142][ T5776] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 185.026231][ T5776]
[ 185.028815][ T5776] CPU: 1 UID: 0 PID: 5776 Comm: syz-executor427 Not tainted 6.13.0-syzkaller-07078-gb46c89c08f41 #0
[ 185.039894][ T5776] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
[ 185.050218][ T5776] =====================================================
[ 185.057342][ T5776] Disabling lock debugging due to kernel taint
[ 185.063681][ T5776] Kernel panic - not syncing: kmsan.panic set ...
[ 185.070213][ T5776] CPU: 1 UID: 0 PID: 5776 Comm: syz-executor427 Tainted: G B 6.13.0-syzkaller-07078-gb46c89c08f41 #0
[ 185.082579][ T5776] Tainted: [B]=BAD_PAGE
[ 185.086809][ T5776] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
[ 185.096991][ T5776] Call Trace:
[ 185.100357][ T5776] <TASK>
[ 185.103351][ T5776] dump_stack_lvl+0x216/0x2d0
[ 185.108121][ T5776] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 185.114071][ T5776] dump_stack+0x1e/0x24
[ 185.118343][ T5776] panic+0x4e2/0xcf0
[ 185.122368][ T5776] ? kmsan_get_metadata+0x51/0x1c0
[ 185.127611][ T5776] kmsan_report+0x2c7/0x2d0
[ 185.132265][ T5776] ? kernel_text_address+0x100/0x1b0
[ 185.137754][ T5776] ? kmsan_get_metadata+0x13e/0x1c0
[ 185.143184][ T5776] ? __msan_warning+0x95/0x120
[ 185.148120][ T5776] ? iov_iter_alignment_iovec+0x1a8/0x470
[ 185.154085][ T5776] ? iov_iter_alignment+0x1ac/0x2d0
[ 185.159483][ T5776] ? exfat_file_write_iter+0x1df/0xcb0
[ 185.165062][ T5776] ? io_write+0xd41/0x2380
[ 185.169614][ T5776] ? io_issue_sqe+0x436/0x1f60
[ 185.174501][ T5776] ? io_submit_sqes+0x11bc/0x2f80
[ 185.179649][ T5776] ? __se_sys_io_uring_enter+0x41d/0x4da0
[ 185.185464][ T5776] ? __x64_sys_io_uring_enter+0x11f/0x1a0
[ 185.191409][ T5776] ? x64_sys_call+0xce5/0x3c30
[ 185.196271][ T5776] ? do_syscall_64+0xcd/0x1e0
[ 185.201087][ T5776] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 185.207355][ T5776] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 185.213311][ T5776] ? _raw_spin_unlock_irqrestore+0x3f/0x60
[ 185.219255][ T5776] ? kmsan_get_metadata+0x13e/0x1c0
[ 185.224586][ T5776] ? kmsan_internal_set_shadow_origin+0x69/0x100
[ 185.231116][ T5776] ? kmsan_get_metadata+0x13e/0x1c0
[ 185.236437][ T5776] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 185.242380][ T5776] ? kmsan_get_metadata+0x13e/0x1c0
[ 185.247699][ T5776] ? kmsan_get_metadata+0x13e/0x1c0
[ 185.253106][ T5776] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 185.259103][ T5776] __msan_warning+0x95/0x120
[ 185.263820][ T5776] iov_iter_alignment_iovec+0x1a8/0x470
[ 185.269549][ T5776] iov_iter_alignment+0x1ac/0x2d0
[ 185.274782][ T5776] exfat_file_write_iter+0x1df/0xcb0
[ 185.280244][ T5776] ? __pfx_exfat_file_write_iter+0x10/0x10
[ 185.286251][ T5776] io_write+0xd41/0x2380
[ 185.290636][ T5776] ? __pfx_io_write+0x10/0x10
[ 185.295444][ T5776] io_issue_sqe+0x436/0x1f60
[ 185.300162][ T5776] ? io_prep_rwv+0x129/0x510
[ 185.304884][ T5776] io_submit_sqes+0x11bc/0x2f80
[ 185.309891][ T5776] ? kmsan_internal_set_shadow_origin+0x69/0x100
[ 185.316455][ T5776] __se_sys_io_uring_enter+0x41d/0x4da0
[ 185.322113][ T5776] ? kmsan_get_metadata+0x13e/0x1c0
[ 185.327524][ T5776] ? kmsan_get_metadata+0x13e/0x1c0
[ 185.332867][ T5776] ? kmsan_get_metadata+0x13e/0x1c0
[ 185.338318][ T5776] ? kmsan_internal_set_shadow_origin+0x69/0x100
[ 185.344799][ T5776] ? kmsan_get_metadata+0x13e/0x1c0
[ 185.350132][ T5776] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 185.356068][ T5776] ? kmsan_get_metadata+0x13e/0x1c0
[ 185.361410][ T5776] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 185.367387][ T5776] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0
[ 185.373482][ T5776] __x64_sys_io_uring_enter+0x11f/0x1a0
[ 185.379184][ T5776] x64_sys_call+0xce5/0x3c30
[ 185.383976][ T5776] do_syscall_64+0xcd/0x1e0
[ 185.388601][ T5776] ? clear_bhb_loop+0x25/0x80
[ 185.393489][ T5776] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 185.399518][ T5776] RIP: 0033:0x7f12eb030d19
[ 185.404050][ T5776] 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
[ 185.423804][ T5776] RSP: 002b:00007ffccfe69648 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
[ 185.432448][ T5776] RAX: ffffffffffffffda RBX: 00000000000000d3 RCX: 00007f12eb030d19
[ 185.440627][ T5776] RDX: 0000000000000000 RSI: 00000000000047ba RDI: 0000000000000006
[ 185.448897][ T5776] RBP: 0000000000000006 R08: 0000000000000000 R09: 0000000000000000
[ 185.456995][ T5776] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffccfe69680
[ 185.465056][ T5776] R13: 00007ffccfe698a8 R14: 431bde82d7b634db R15: 00007f12eb07903b
[ 185.473136][ T5776] </TASK>
[ 185.476598][ T5776] Kernel Offset: disabled
[ 185.481006][ T5776] Rebooting in 86400 seconds..