./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor783435923

<...>
Warning: Permanently added '10.128.10.38' (ED25519) to the list of known hosts.
[   91.941456][   T24] cfg80211: failed to load regulatory.db
execve("./syz-executor783435923", ["./syz-executor783435923"], 0x7ffc91f11070 /* 10 vars */) = 0
brk(NULL)                               = 0x55558c401000
brk(0x55558c401d00)                     = 0x55558c401d00
arch_prctl(ARCH_SET_FS, 0x55558c401380) = 0
set_tid_address(0x55558c401650)         = 5841
set_robust_list(0x55558c401660, 24)     = 0
rseq(0x55558c401ca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor783435923", 4096) = 27
getrandom("\xb2\x51\xca\xa7\x86\x78\x65\x3c", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x55558c401d00
brk(0x55558c422d00)                     = 0x55558c422d00
brk(0x55558c423000)                     = 0x55558c423000
mprotect(0x7f9733b69000, 16384, PROT_READ) = 0
mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000
mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000
mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5842 attached
, child_tidptr=0x55558c401650) = 5842
[pid  5842] set_robust_list(0x55558c401660, 24) = 0
[pid  5841] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
./strace-static-x86_64: Process 5843 attached
[pid  5843] set_robust_list(0x55558c401660, 24 <unfinished ...>
[pid  5842] ioctl(3, LOOP_CLR_FD <unfinished ...>
[pid  5841] <... clone resumed>, child_tidptr=0x55558c401650) = 5843
[pid  5843] <... set_robust_list resumed>) = 0
[pid  5842] <... ioctl resumed>)        = -1 ENXIO (No such device or address)
[pid  5841] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5843] openat(AT_FDCWD, "/dev/loop1", O_RDWR <unfinished ...>
[pid  5842] close(3)                    = 0
./strace-static-x86_64: Process 5844 attached
[pid  5843] <... openat resumed>)       = 3
[pid  5843] ioctl(3, LOOP_CLR_FD <unfinished ...>
[pid  5841] <... clone resumed>, child_tidptr=0x55558c401650) = 5844
[pid  5844] set_robust_list(0x55558c401660, 24 <unfinished ...>
[pid  5842] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5844] <... set_robust_list resumed>) = 0
./strace-static-x86_64: Process 5845 attached
[pid  5841] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5844] openat(AT_FDCWD, "/dev/loop2", O_RDWR <unfinished ...>
[pid  5843] <... ioctl resumed>)        = -1 ENXIO (No such device or address)
./strace-static-x86_64: Process 5846 attached
[pid  5845] set_robust_list(0x55558c401660, 24 <unfinished ...>
[pid  5843] close(3 <unfinished ...>
[pid  5841] <... clone resumed>, child_tidptr=0x55558c401650) = 5846
[pid  5846] set_robust_list(0x55558c401660, 24 <unfinished ...>
[pid  5845] <... set_robust_list resumed>) = 0
[pid  5843] <... close resumed>)        = 0
[pid  5842] <... clone resumed>, child_tidptr=0x55558c401650) = 5845
[pid  5841] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5846] <... set_robust_list resumed>) = 0
[pid  5845] prctl(PR_SET_PDEATHSIG, SIGKILL <unfinished ...>
[pid  5846] openat(AT_FDCWD, "/dev/loop3", O_RDWR <unfinished ...>
[pid  5845] <... prctl resumed>)        = 0
[pid  5843] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5845] setpgid(0, 0)               = 0
./strace-static-x86_64: Process 5847 attached
[pid  5845] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC <unfinished ...>
[pid  5844] <... openat resumed>)       = 3
./strace-static-x86_64: Process 5848 attached
[pid  5847] set_robust_list(0x55558c401660, 24 <unfinished ...>
[pid  5846] <... openat resumed>)       = 3
[pid  5844] ioctl(3, LOOP_CLR_FD <unfinished ...>
[pid  5841] <... clone resumed>, child_tidptr=0x55558c401650) = 5847
[pid  5845] <... openat resumed>)       = 3
[pid  5844] <... ioctl resumed>)        = -1 ENXIO (No such device or address)
[pid  5847] <... set_robust_list resumed>) = 0
[pid  5844] close(3 <unfinished ...>
[pid  5846] ioctl(3, LOOP_CLR_FD <unfinished ...>
[pid  5845] write(3, "1000", 4)         = 4
[pid  5846] <... ioctl resumed>)        = -1 ENXIO (No such device or address)
[pid  5848] set_robust_list(0x55558c401660, 24 <unfinished ...>
[pid  5847] openat(AT_FDCWD, "/dev/loop4", O_RDWR <unfinished ...>
[pid  5846] close(3 <unfinished ...>
[pid  5845] close(3 <unfinished ...>
[pid  5844] <... close resumed>)        = 0
[pid  5843] <... clone resumed>, child_tidptr=0x55558c401650) = 5848
[pid  5848] <... set_robust_list resumed>) = 0
[pid  5847] <... openat resumed>)       = 3
[pid  5845] <... close resumed>)        = 0
[pid  5844] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5848] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5848] setpgid(0, 0 <unfinished ...>
[pid  5847] ioctl(3, LOOP_CLR_FD)       = -1 ENXIO (No such device or address)
[pid  5848] <... setpgid resumed>)      = 0
[pid  5847] close(3 <unfinished ...>
[pid  5848] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC <unfinished ...>
[pid  5847] <... close resumed>)        = 0
[pid  5847] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDexecuting program
./strace-static-x86_64: Process 5850 attached
./strace-static-x86_64: Process 5849 attached
 <unfinished ...>
[pid  5848] <... openat resumed>)       = 3
[pid  5845] write(1, "executing program\n", 18 <unfinished ...>
[pid  5844] <... clone resumed>, child_tidptr=0x55558c401650) = 5849
[pid  5849] set_robust_list(0x55558c401660, 24 <unfinished ...>
[pid  5848] write(3, "1000", 4 <unfinished ...>
[pid  5846] <... close resumed>)        = 0
[pid  5845] <... write resumed>)        = 18
[pid  5848] <... write resumed>)        = 4
executing program
[pid  5850] set_robust_list(0x55558c401660, 24 <unfinished ...>
[pid  5848] close(3 <unfinished ...>
[pid  5850] <... set_robust_list resumed>) = 0
[pid  5848] <... close resumed>)        = 0
[pid  5850] prctl(PR_SET_PDEATHSIG, SIGKILL <unfinished ...>
[pid  5848] write(1, "executing program\n", 18 <unfinished ...>
[pid  5850] <... prctl resumed>)        = 0
[pid  5848] <... write resumed>)        = 18
[pid  5850] setpgid(0, 0 <unfinished ...>
[pid  5849] <... set_robust_list resumed>) = 0
[pid  5848] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5846] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5845] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5850] <... setpgid resumed>)      = 0
[pid  5850] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC./strace-static-x86_64: Process 5851 attached
) = 3
[pid  5849] prctl(PR_SET_PDEATHSIG, SIGKILL <unfinished ...>
[pid  5847] <... clone resumed>, child_tidptr=0x55558c401650) = 5850
[pid  5849] <... prctl resumed>)        = 0
[pid  5845] <... memfd_create resumed>) = 3
[pid  5850] write(3, "1000", 4 <unfinished ...>
[pid  5849] setpgid(0, 0 <unfinished ...>
[pid  5848] <... memfd_create resumed>) = 3
[pid  5851] set_robust_list(0x55558c401660, 24 <unfinished ...>
[pid  5845] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 <unfinished ...>
[pid  5850] <... write resumed>)        = 4
[pid  5848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 <unfinished ...>
[pid  5850] close(3)                    = 0
[pid  5848] <... mmap resumed>)         = 0x7f972b600000
[pid  5850] write(1, "executing program\n", 18 <unfinished ...>
[pid  5849] <... setpgid resumed>)      = 0
[pid  5845] <... mmap resumed>)         = 0x7f972b600000
[pid  5851] <... set_robust_list resumed>) = 0
executing program
[pid  5851] prctl(PR_SET_PDEATHSIG, SIGKILL <unfinished ...>
[pid  5850] <... write resumed>)        = 18
[pid  5849] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC <unfinished ...>
[pid  5846] <... clone resumed>, child_tidptr=0x55558c401650) = 5851
[pid  5850] memfd_create("syzkaller", 0) = 3
[pid  5850] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f972b600000
[pid  5851] <... prctl resumed>)        = 0
[pid  5851] setpgid(0, 0 <unfinished ...>
[pid  5849] <... openat resumed>)       = 3
[pid  5851] <... setpgid resumed>)      = 0
[pid  5849] write(3, "1000", 4 <unfinished ...>
[pid  5851] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC <unfinished ...>
[pid  5849] <... write resumed>)        = 4
[pid  5851] <... openat resumed>)       = 3
[pid  5849] close(3)                    = 0
executing program
[pid  5851] write(3, "1000", 4 <unfinished ...>
[pid  5849] write(1, "executing program\n", 18 <unfinished ...>
[pid  5851] <... write resumed>)        = 4
[pid  5849] <... write resumed>)        = 18
executing program
[pid  5851] close(3 <unfinished ...>
[pid  5849] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5851] <... close resumed>)        = 0
[pid  5851] write(1, "executing program\n", 18) = 18
[pid  5851] memfd_create("syzkaller", 0) = 3
[pid  5849] <... memfd_create resumed>) = 3
[pid  5851] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 <unfinished ...>
[pid  5849] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 <unfinished ...>
[pid  5851] <... mmap resumed>)         = 0x7f972b600000
[pid  5849] <... mmap resumed>)         = 0x7f972b600000
[pid  5848] 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 <unfinished ...>
[pid  5850] 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 <unfinished ...>
[pid  5845] 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 <unfinished ...>
[pid  5849] 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 <unfinished ...>
[pid  5851] 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 <unfinished ...>
[pid  5850] <... write resumed>)        = 16777216
[pid  5850] munmap(0x7f972b600000, 138412032 <unfinished ...>
[pid  5848] <... write resumed>)        = 16777216
[pid  5848] munmap(0x7f972b600000, 138412032 <unfinished ...>
[pid  5845] <... write resumed>)        = 16777216
[pid  5845] munmap(0x7f972b600000, 138412032 <unfinished ...>
[pid  5850] <... munmap resumed>)       = 0
[pid  5850] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4
[pid  5850] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5850] close(3)                    = 0
[pid  5850] close(4)                    = 0
[pid  5850] mkdir("./file0", 0777 <unfinished ...>
[pid  5849] <... write resumed>)        = 16777216
[pid  5850] <... mkdir resumed>)        = 0
[pid  5849] munmap(0x7f972b600000, 138412032 <unfinished ...>
[pid  5850] mount("/dev/loop4", "./file0", "gfs2", 0, "" <unfinished ...>
[pid  5848] <... munmap resumed>)       = 0
[   93.487172][ T5850] loop4: detected capacity change from 0 to 32768
[pid  5848] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4
[pid  5848] ioctl(4, LOOP_SET_FD, 3 <unfinished ...>
[pid  5851] <... write resumed>)        = 16777216
[pid  5851] munmap(0x7f972b600000, 138412032 <unfinished ...>
[pid  5848] <... ioctl resumed>)        = 0
[pid  5848] close(3)                    = 0
[pid  5848] close(4)                    = 0
[pid  5848] mkdir("./file0", 0777)      = -1 EEXIST (File exists)
[   93.534233][ T5848] loop1: detected capacity change from 0 to 32768
[   93.568060][ T5850] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[   93.577156][ T5850] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[   93.611834][ T5848] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[   93.620310][ T5848] CPU: 0 UID: 0 PID: 5848 Comm: syz-executor783 Not tainted 6.15.0-next-20250530-syzkaller #0 PREEMPT(full) 
[   93.620338][ T5848] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[   93.620358][ T5848] Call Trace:
[   93.620366][ T5848]  <TASK>
[   93.620374][ T5848]  dump_stack_lvl+0x189/0x250
[   93.620417][ T5848]  ? kernfs_path_from_node+0x2c/0x260
[   93.620450][ T5848]  ? __pfx_dump_stack_lvl+0x10/0x10
[   93.620466][ T5848]  ? __pfx__printk+0x10/0x10
[   93.620487][ T5848]  ? kernfs_path_from_node+0x2c/0x260
[   93.620509][ T5848]  ? kernfs_path_from_node+0x2c/0x260
[   93.620534][ T5848]  ? kernfs_path_from_node+0x22c/0x260
[   93.620563][ T5848]  ? kernfs_path_from_node+0x2c/0x260
[   93.620589][ T5848]  sysfs_create_dir_ns+0x259/0x280
[   93.620614][ T5848]  ? __pfx_sysfs_create_dir_ns+0x10/0x10
[   93.620639][ T5848]  ? do_raw_spin_unlock+0x122/0x240
[pid  5848] mount("/dev/loop1", "./file0", "gfs2", 0, "" <unfinished ...>
[pid  5849] <... munmap resumed>)       = 0
[pid  5851] <... munmap resumed>)       = 0
[pid  5849] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4
[   93.620664][ T5848]  kobject_add_internal+0x59f/0xb40
[   93.620693][ T5848]  kobject_init_and_add+0x125/0x190
[   93.620716][ T5848]  ? __pfx_kobject_init_and_add+0x10/0x10
[   93.620734][ T5848]  ? __raw_spin_lock_init+0x45/0x100
[   93.620756][ T5848]  ? __init_swait_queue_head+0xa9/0x150
[   93.620780][ T5848]  gfs2_sys_fs_add+0x237/0x470
[   93.620800][ T5848]  ? __pfx_gfs2_sys_fs_add+0x10/0x10
[   93.620822][ T5848]  ? is_dynamic_key+0xd6/0x1c0
[   93.620846][ T5848]  ? __pfx_alloc_workqueue+0x10/0x10
[   93.620879][ T5848]  gfs2_fill_super+0x1348/0x2010
[pid  5849] ioctl(4, LOOP_SET_FD, 3 <unfinished ...>
[pid  5851] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4
[   93.620916][ T5848]  ? __pfx_gfs2_fill_super+0x10/0x10
[   93.620942][ T5848]  ? sb_set_blocksize+0x104/0x180
[   93.620970][ T5848]  ? setup_bdev_super+0x4c1/0x5b0
[   93.620991][ T5848]  get_tree_bdev_flags+0x40b/0x4d0
[   93.621010][ T5848]  ? __pfx_gfs2_fill_super+0x10/0x10
[   93.621032][ T5848]  ? __pfx_get_tree_bdev_flags+0x10/0x10
[   93.621052][ T5848]  ? rcu_is_watching+0x15/0xb0
[   93.621073][ T5848]  gfs2_get_tree+0x51/0x1e0
[   93.621098][ T5848]  vfs_get_tree+0x8f/0x2b0
[   93.621119][ T5848]  do_new_mount+0x24a/0xa40
[   93.621147][ T5848]  __se_sys_mount+0x317/0x410
[   93.621174][ T5848]  ? __pfx___se_sys_mount+0x10/0x10
[   93.621194][ T5848]  ? rcu_is_watching+0x15/0xb0
[   93.621215][ T5848]  ? __x64_sys_mount+0x20/0xc0
[   93.621239][ T5848]  do_syscall_64+0xfa/0x3b0
[   93.621254][ T5848]  ? lockdep_hardirqs_on+0x9c/0x150
[   93.621278][ T5848]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   93.621297][ T5848]  ? clear_bhb_loop+0x60/0xb0
[   93.621318][ T5848]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   93.621334][ T5848] RIP: 0033:0x7f9733ae4f1a
[   93.621354][ T5848] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
[   93.621369][ T5848] RSP: 002b:00007fff74f7d628 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
[   93.621394][ T5848] RAX: ffffffffffffffda RBX: 00007fff74f7d640 RCX: 00007f9733ae4f1a
[   93.621406][ T5848] RDX: 00002000000124c0 RSI: 0000200000001c00 RDI: 00007fff74f7d640
[pid  5851] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5849] <... ioctl resumed>)        = 0
[pid  5845] <... munmap resumed>)       = 0
[pid  5845] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5845] ioctl(4, LOOP_SET_FD, 3 <unfinished ...>
[pid  5849] close(3)                    = 0
[pid  5851] close(3 <unfinished ...>
[pid  5849] close(4 <unfinished ...>
[pid  5851] <... close resumed>)        = 0
[pid  5849] <... close resumed>)        = 0
[pid  5851] close(4)                    = 0
[pid  5849] mkdir("./file0", 0777)      = -1 EEXIST (File exists)
[pid  5851] mkdir("./file0", 0777)      = -1 EEXIST (File exists)
[pid  5849] mount("/dev/loop2", "./file0", "gfs2", 0, "" <unfinished ...>
[pid  5851] mount("/dev/loop3", "./file0", "gfs2", 0, "" <unfinished ...>
[pid  5845] <... ioctl resumed>)        = 0
[pid  5845] close(3)                    = 0
[pid  5845] close(4)                    = 0
[pid  5845] mkdir("./file0", 0777)      = -1 EEXIST (File exists)
[   93.621418][ T5848] RBP: 0000200000001c00 R08: 00007fff74f7d680 R09: 00000000000125e4
[   93.621430][ T5848] R10: 0000000000000000 R11: 0000000000000282 R12: 00002000000124c0
[   93.621440][ T5848] R13: 00007fff74f7d680 R14: 0000000000000003 R15: 0000000000000000
[   93.621465][ T5848]  </TASK>
[   93.621496][ T5848] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[   93.732422][ T5849] loop2: detected capacity change from 0 to 32768
[   93.769695][ T5848] gfs2: fsid=syz:syz: error -17 adding sysfs files
[   93.773173][ T5851] loop3: detected capacity change from 0 to 32768
[   93.811875][ T5850] gfs2: fsid=syz:syz.0: journal 0 mapped with 3 extents in 0ms
[   93.872612][ T5845] loop0: detected capacity change from 0 to 32768
[   93.885502][ T5848] ==================================================================
[   93.990317][ T5848] BUG: KASAN: null-ptr-deref in gfs2_drop_inode+0x20c/0x3a0
[   93.997665][ T5848] Read of size 8 at addr 00000000000000a8 by task syz-executor783/5848
[   94.005945][ T5848] 
[   94.008324][ T5848] CPU: 0 UID: 0 PID: 5848 Comm: syz-executor783 Not tainted 6.15.0-next-20250530-syzkaller #0 PREEMPT(full) 
[   94.008355][ T5848] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[   94.008369][ T5848] Call Trace:
[   94.008379][ T5848]  <TASK>
[   94.008390][ T5848]  dump_stack_lvl+0x189/0x250
[   94.008419][ T5848]  ? __pfx_dump_stack_lvl+0x10/0x10
[   94.008442][ T5848]  ? _raw_spin_lock_irqsave+0xb3/0xf0
[   94.008483][ T5848]  ? do_raw_spin_lock+0x121/0x290
[   94.008514][ T5848]  ? gfs2_drop_inode+0x20c/0x3a0
[   94.008553][ T5848]  ? gfs2_drop_inode+0x20c/0x3a0
[   94.008588][ T5848]  kasan_report+0x118/0x150
[   94.008616][ T5848]  ? gfs2_drop_inode+0x20c/0x3a0
[   94.008656][ T5848]  kasan_check_range+0x2b0/0x2c0
[   94.008686][ T5848]  gfs2_drop_inode+0x20c/0x3a0
[   94.008724][ T5848]  iput+0x45d/0x9d0
[   94.008758][ T5848]  gfs2_fill_super+0x1418/0x2010
[   94.008797][ T5848]  ? __pfx_gfs2_fill_super+0x10/0x10
[   94.008830][ T5848]  ? sb_set_blocksize+0x104/0x180
[   94.008866][ T5848]  ? setup_bdev_super+0x4c1/0x5b0
[   94.008893][ T5848]  get_tree_bdev_flags+0x40b/0x4d0
[   94.008918][ T5848]  ? __pfx_gfs2_fill_super+0x10/0x10
[   94.008949][ T5848]  ? __pfx_get_tree_bdev_flags+0x10/0x10
[   94.008984][ T5848]  ? rcu_is_watching+0x15/0xb0
[   94.009014][ T5848]  gfs2_get_tree+0x51/0x1e0
[   94.009045][ T5848]  vfs_get_tree+0x8f/0x2b0
[   94.009071][ T5848]  do_new_mount+0x24a/0xa40
[   94.009104][ T5848]  __se_sys_mount+0x317/0x410
[   94.009136][ T5848]  ? __pfx___se_sys_mount+0x10/0x10
[   94.009164][ T5848]  ? rcu_is_watching+0x15/0xb0
[   94.009188][ T5848]  ? __x64_sys_mount+0x20/0xc0
[   94.009217][ T5848]  do_syscall_64+0xfa/0x3b0
[   94.009238][ T5848]  ? lockdep_hardirqs_on+0x9c/0x150
[   94.009281][ T5848]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   94.009304][ T5848]  ? clear_bhb_loop+0x60/0xb0
[   94.009330][ T5848]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   94.009352][ T5848] RIP: 0033:0x7f9733ae4f1a
[   94.009374][ T5848] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
[   94.009394][ T5848] RSP: 002b:00007fff74f7d628 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
[   94.009419][ T5848] RAX: ffffffffffffffda RBX: 00007fff74f7d640 RCX: 00007f9733ae4f1a
[   94.009436][ T5848] RDX: 00002000000124c0 RSI: 0000200000001c00 RDI: 00007fff74f7d640
[   94.009453][ T5848] RBP: 0000200000001c00 R08: 00007fff74f7d680 R09: 00000000000125e4
[   94.009469][ T5848] R10: 0000000000000000 R11: 0000000000000282 R12: 00002000000124c0
[   94.009485][ T5848] R13: 00007fff74f7d680 R14: 0000000000000003 R15: 0000000000000000
[   94.009510][ T5848]  </TASK>
[   94.009519][ T5848] ==================================================================
[   94.053661][  T980] gfs2: fsid=syz:syz.0: jid=0, already locked for use
[   94.058196][ T5848] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[   94.058217][ T5848] CPU: 0 UID: 0 PID: 5848 Comm: syz-executor783 Not tainted 6.15.0-next-20250530-syzkaller #0 PREEMPT(full) 
[   94.058247][ T5848] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[   94.058270][ T5848] Call Trace:
[   94.058279][ T5848]  <TASK>
[   94.058289][ T5848]  dump_stack_lvl+0x99/0x250
[   94.058318][ T5848]  ? __asan_memcpy+0x40/0x70
[   94.058353][ T5848]  ? __pfx_dump_stack_lvl+0x10/0x10
[   94.058375][ T5848]  ? __pfx__printk+0x10/0x10
[   94.058406][ T5848]  panic+0x2db/0x790
[   94.058439][ T5848]  ? lockdep_hardirqs_on+0x9c/0x150
[   94.058476][ T5848]  ? __pfx_panic+0x10/0x10
[   94.058513][ T5848]  ? _raw_spin_unlock_irqrestore+0xa8/0x110
[   94.058546][ T5848]  ? _raw_spin_unlock_irqrestore+0xad/0x110
[   94.058577][ T5848]  ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10
[   94.058608][ T5848]  ? do_raw_spin_lock+0x121/0x290
[   94.058638][ T5848]  ? gfs2_drop_inode+0x20c/0x3a0
[   94.058674][ T5848]  check_panic_on_warn+0x89/0xb0
[   94.058704][ T5848]  ? gfs2_drop_inode+0x20c/0x3a0
[   94.058737][ T5848]  end_report+0x78/0x160
[   94.058762][ T5848]  kasan_report+0x129/0x150
[   94.058788][ T5848]  ? gfs2_drop_inode+0x20c/0x3a0
[   94.058828][ T5848]  kasan_check_range+0x2b0/0x2c0
[   94.058855][ T5848]  gfs2_drop_inode+0x20c/0x3a0
[   94.058892][ T5848]  iput+0x45d/0x9d0
[   94.058924][ T5848]  gfs2_fill_super+0x1418/0x2010
[   94.058963][ T5848]  ? __pfx_gfs2_fill_super+0x10/0x10
[   94.058995][ T5848]  ? sb_set_blocksize+0x104/0x180
[   94.059031][ T5848]  ? setup_bdev_super+0x4c1/0x5b0
[   94.059056][ T5848]  get_tree_bdev_flags+0x40b/0x4d0
[   94.059081][ T5848]  ? __pfx_gfs2_fill_super+0x10/0x10
[   94.059110][ T5848]  ? __pfx_get_tree_bdev_flags+0x10/0x10
[   94.059135][ T5848]  ? rcu_is_watching+0x15/0xb0
[   94.059161][ T5848]  gfs2_get_tree+0x51/0x1e0
[   94.059191][ T5848]  vfs_get_tree+0x8f/0x2b0
[   94.059217][ T5848]  do_new_mount+0x24a/0xa40
[   94.059249][ T5848]  __se_sys_mount+0x317/0x410
[   94.059289][ T5848]  ? __pfx___se_sys_mount+0x10/0x10
[   94.059316][ T5848]  ? rcu_is_watching+0x15/0xb0
[   94.059340][ T5848]  ? __x64_sys_mount+0x20/0xc0
[   94.059371][ T5848]  do_syscall_64+0xfa/0x3b0
[   94.059391][ T5848]  ? lockdep_hardirqs_on+0x9c/0x150
[   94.059425][ T5848]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   94.059448][ T5848]  ? clear_bhb_loop+0x60/0xb0
[   94.059475][ T5848]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   94.059497][ T5848] RIP: 0033:0x7f9733ae4f1a
[   94.059518][ T5848] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
[   94.059537][ T5848] RSP: 002b:00007fff74f7d628 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
[   94.059563][ T5848] RAX: ffffffffffffffda RBX: 00007fff74f7d640 RCX: 00007f9733ae4f1a
[   94.059580][ T5848] RDX: 00002000000124c0 RSI: 0000200000001c00 RDI: 00007fff74f7d640
[   94.059597][ T5848] RBP: 0000200000001c00 R08: 00007fff74f7d680 R09: 00000000000125e4
[   94.059618][ T5848] R10: 0000000000000000 R11: 0000000000000282 R12: 00002000000124c0
[   94.059633][ T5848] R13: 00007fff74f7d680 R14: 0000000000000003 R15: 0000000000000000
[   94.059657][ T5848]  </TASK>
[   94.063166][ T5848] Kernel Offset: disabled