./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1159379142

<...>
Warning: Permanently added '10.128.1.17' (ED25519) to the list of known hosts.
execve("./syz-executor1159379142", ["./syz-executor1159379142"], 0x7ffcc51abee0 /* 10 vars */) = 0
brk(NULL)                               = 0x555580c55000
brk(0x555580c55d00)                     = 0x555580c55d00
arch_prctl(ARCH_SET_FS, 0x555580c55380) = 0
set_tid_address(0x555580c55650)         = 5838
set_robust_list(0x555580c55660, 24)     = 0
rseq(0x555580c55ca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor1159379142", 4096) = 28
getrandom("\x53\x77\x6d\x59\x4e\xf2\x5c\xb6", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x555580c55d00
brk(0x555580c76d00)                     = 0x555580c76d00
brk(0x555580c77000)                     = 0x555580c77000
mprotect(0x7fe87c437000, 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 5839 attached
, child_tidptr=0x555580c55650) = 5839
[pid  5838] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5839] set_robust_list(0x555580c55660, 24) = 0
[pid  5839] openat(AT_FDCWD, "/dev/loop0", O_RDWR./strace-static-x86_64: Process 5840 attached
 <unfinished ...>
[pid  5840] set_robust_list(0x555580c55660, 24 <unfinished ...>
[pid  5838] <... clone resumed>, child_tidptr=0x555580c55650) = 5840
[pid  5840] <... set_robust_list resumed>) = 0
[pid  5838] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5840] openat(AT_FDCWD, "/dev/loop1", O_RDWR <unfinished ...>
[pid  5839] <... openat resumed>)       = 3
[pid  5839] ioctl(3, LOOP_CLR_FD./strace-static-x86_64: Process 5841 attached
 <unfinished ...>
[pid  5841] set_robust_list(0x555580c55660, 24 <unfinished ...>
[pid  5840] <... openat resumed>)       = 3
[pid  5839] <... ioctl resumed>)        = -1 ENXIO (No such device or address)
[pid  5838] <... clone resumed>, child_tidptr=0x555580c55650) = 5841
[pid  5839] close(3 <unfinished ...>
[pid  5838] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5841] <... set_robust_list resumed>) = 0
[pid  5840] ioctl(3, LOOP_CLR_FD <unfinished ...>
[pid  5839] <... close resumed>)        = 0
./strace-static-x86_64: Process 5842 attached
[pid  5841] openat(AT_FDCWD, "/dev/loop2", O_RDWR <unfinished ...>
[pid  5840] <... ioctl resumed>)        = -1 ENXIO (No such device or address)
[pid  5838] <... clone resumed>, child_tidptr=0x555580c55650) = 5842
[pid  5840] close(3 <unfinished ...>
[pid  5839] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5843 attached
 <unfinished ...>
[pid  5838] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5842] set_robust_list(0x555580c55660, 24 <unfinished ...>
[pid  5840] <... close resumed>)        = 0
[pid  5842] <... set_robust_list resumed>) = 0
[pid  5841] <... openat resumed>)       = 3
[pid  5840] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5844 attached
 <unfinished ...>
[pid  5843] set_robust_list(0x555580c55660, 24) = 0
[pid  5844] set_robust_list(0x555580c55660, 24) = 0
[pid  5843] prctl(PR_SET_PDEATHSIG, SIGKILL <unfinished ...>
[pid  5844] openat(AT_FDCWD, "/dev/loop4", O_RDWR <unfinished ...>
[pid  5842] openat(AT_FDCWD, "/dev/loop3", O_RDWR./strace-static-x86_64: Process 5845 attached
 <unfinished ...>
[pid  5838] <... clone resumed>, child_tidptr=0x555580c55650) = 5844
[pid  5844] <... openat resumed>)       = 3
[pid  5843] <... prctl resumed>)        = 0
[pid  5841] ioctl(3, LOOP_CLR_FD <unfinished ...>
[pid  5839] <... clone resumed>, child_tidptr=0x555580c55650) = 5843
[pid  5841] <... ioctl resumed>)        = -1 ENXIO (No such device or address)
[pid  5845] set_robust_list(0x555580c55660, 24 <unfinished ...>
[pid  5844] ioctl(3, LOOP_CLR_FD <unfinished ...>
[pid  5843] setpgid(0, 0 <unfinished ...>
[pid  5842] <... openat resumed>)       = 3
[pid  5841] close(3 <unfinished ...>
[pid  5840] <... clone resumed>, child_tidptr=0x555580c55650) = 5845
[pid  5845] <... set_robust_list resumed>) = 0
[pid  5844] <... ioctl resumed>)        = -1 ENXIO (No such device or address)
[pid  5843] <... setpgid resumed>)      = 0
[pid  5841] <... close resumed>)        = 0
[pid  5845] prctl(PR_SET_PDEATHSIG, SIGKILL <unfinished ...>
[pid  5843] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC <unfinished ...>
[pid  5841] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5847 attached
 <unfinished ...>
[pid  5844] close(3 <unfinished ...>
[pid  5843] <... openat resumed>)       = 3
[pid  5845] <... prctl resumed>)        = 0
[pid  5844] <... close resumed>)        = 0
[pid  5842] ioctl(3, LOOP_CLR_FD <unfinished ...>
[pid  5847] set_robust_list(0x555580c55660, 24) = 0
[pid  5842] <... ioctl resumed>)        = -1 ENXIO (No such device or address)
[pid  5847] prctl(PR_SET_PDEATHSIG, SIGKILL <unfinished ...>
[pid  5845] setpgid(0, 0 <unfinished ...>
[pid  5844] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5843] write(3, "1000", 4 <unfinished ...>
[pid  5847] <... prctl resumed>)        = 0
./strace-static-x86_64: Process 5848 attached
[pid  5847] setpgid(0, 0 <unfinished ...>
[pid  5845] <... setpgid resumed>)      = 0
[pid  5843] <... write resumed>)        = 4
[pid  5842] close(3 <unfinished ...>
[pid  5848] set_robust_list(0x555580c55660, 24 <unfinished ...>
[pid  5847] <... setpgid resumed>)      = 0
[pid  5848] <... set_robust_list resumed>) = 0
[pid  5847] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC <unfinished ...>
[pid  5845] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC <unfinished ...>
[pid  5843] close(3 <unfinished ...>
[pid  5842] <... close resumed>)        = 0
[pid  5848] prctl(PR_SET_PDEATHSIG, SIGKILL <unfinished ...>
[pid  5843] <... close resumed>)        = 0
[pid  5842] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD <unfinished ...>
[pid  5848] <... prctl resumed>)        = 0
[pid  5847] <... openat resumed>)       = 3
[pid  5843] write(1, "executing program\n", 18executing program
 <unfinished ...>
[pid  5848] setpgid(0, 0 <unfinished ...>
[pid  5847] write(3, "1000", 4 <unfinished ...>
[pid  5845] <... openat resumed>)       = 3
[pid  5843] <... write resumed>)        = 18
[pid  5841] <... clone resumed>, child_tidptr=0x555580c55650) = 5847
./strace-static-x86_64: Process 5850 attached
[pid  5848] <... setpgid resumed>)      = 0
[pid  5847] <... write resumed>)        = 4
[pid  5845] write(3, "1000", 4 <unfinished ...>
[pid  5844] <... clone resumed>, child_tidptr=0x555580c55650) = 5848
[pid  5843] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5847] close(3 <unfinished ...>
[pid  5842] <... clone resumed>, child_tidptr=0x555580c55650) = 5850
[pid  5845] <... write resumed>)        = 4
[pid  5845] close(3)                    = 0
[pid  5847] <... close resumed>)        = 0
[pid  5843] <... memfd_create resumed>) = 3
[pid  5845] write(1, "executing program\n", 18 <unfinished ...>
[pid  5843] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 <unfinished ...>
[pid  5848] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC <unfinished ...>
[pid  5847] write(1, "executing program\n", 18executing program
 <unfinished ...>
[pid  5845] <... write resumed>)        = 18
[pid  5843] <... mmap resumed>)         = 0x7fe873e00000
executing program
[pid  5847] <... write resumed>)        = 18
[pid  5845] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5847] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5845] <... memfd_create resumed>) = 3
[pid  5845] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe873e00000
[pid  5848] <... openat resumed>)       = 3
[pid  5850] set_robust_list(0x555580c55660, 24 <unfinished ...>
[pid  5848] write(3, "1000", 4 <unfinished ...>
[pid  5847] <... memfd_create resumed>) = 3
[pid  5850] <... set_robust_list resumed>) = 0
[pid  5848] <... write resumed>)        = 4
[pid  5847] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 <unfinished ...>
[pid  5848] close(3 <unfinished ...>
[pid  5850] prctl(PR_SET_PDEATHSIG, SIGKILL <unfinished ...>
[pid  5848] <... close resumed>)        = 0
[pid  5847] <... mmap resumed>)         = 0x7fe873e00000
[pid  5848] write(1, "executing program\n", 18 <unfinished ...>
[pid  5850] <... prctl resumed>)        = 0
executing program
[pid  5850] setpgid(0, 0 <unfinished ...>
[pid  5848] <... write resumed>)        = 18
[pid  5848] memfd_create("syzkaller", 0 <unfinished ...>
[pid  5850] <... setpgid resumed>)      = 0
[pid  5850] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC <unfinished ...>
[pid  5848] <... memfd_create resumed>) = 3
[pid  5850] <... openat resumed>)       = 3
[pid  5848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe873e00000
[pid  5850] write(3, "1000", 4)         = 4
[pid  5850] close(3)                    = 0
executing program
[pid  5850] write(1, "executing program\n", 18) = 18
[pid  5850] memfd_create("syzkaller", 0) = 3
[pid  5850] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe873e00000
[pid  5843] 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  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  5847] 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  5843] <... write resumed>)        = 16777216
[pid  5843] munmap(0x7fe873e00000, 138412032 <unfinished ...>
[pid  5845] <... write resumed>)        = 16777216
[pid  5845] munmap(0x7fe873e00000, 138412032 <unfinished ...>
[pid  5848] <... write resumed>)        = 16777216
[pid  5848] munmap(0x7fe873e00000, 138412032 <unfinished ...>
[pid  5847] <... write resumed>)        = 16777216
[pid  5850] <... write resumed>)        = 16777216
[pid  5843] <... munmap resumed>)       = 0
[pid  5850] munmap(0x7fe873e00000, 138412032 <unfinished ...>
[pid  5847] munmap(0x7fe873e00000, 138412032 <unfinished ...>
[pid  5843] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5843] ioctl(4, LOOP_SET_FD, 3 <unfinished ...>
[pid  5845] <... munmap resumed>)       = 0
[pid  5845] openat(AT_FDCWD, "/dev/loop1", O_RDWR <unfinished ...>
[pid  5843] <... ioctl resumed>)        = 0
[pid  5845] <... openat resumed>)       = 4
[pid  5843] close(3 <unfinished ...>
[pid  5845] ioctl(4, LOOP_SET_FD, 3 <unfinished ...>
[pid  5843] <... close resumed>)        = 0
[pid  5843] close(4)                    = 0
[pid  5843] mkdir("./file1", 0777)      = 0
[pid  5843] mount("/dev/loop0", "./file1", "gfs2", MS_NODIRATIME|MS_STRICTATIME, "quota_quantum=0x0000000000000004,suiddir,quota,barrier,acl,quota=off,discard,noloccookie,quota=on,lo"... <unfinished ...>
[pid  5845] <... ioctl resumed>)        = 0
[pid  5845] close(3)                    = 0
[pid  5845] close(4)                    = 0
[pid  5845] mkdir("./file1", 0777)      = -1 EEXIST (File exists)
[   90.259019][ T5843] loop0: detected capacity change from 0 to 32768
[   90.288622][ T5845] loop1: detected capacity change from 0 to 32768
[pid  5845] mount("/dev/loop1", "./file1", "gfs2", MS_NODIRATIME|MS_STRICTATIME, "quota_quantum=0x0000000000000004,suiddir,quota,barrier,acl,quota=off,discard,noloccookie,quota=on,lo"... <unfinished ...>
[pid  5848] <... munmap resumed>)       = 0
[pid  5848] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4
[   90.372911][ T5845] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[   90.389596][ T5843] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[   90.391687][ T5848] loop4: detected capacity change from 0 to 32768
[   90.406393][ T5845] CPU: 0 UID: 0 PID: 5845 Comm: syz-executor115 Not tainted 6.15.0-next-20250528-syzkaller #0 PREEMPT(full) 
[pid  5848] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5848] close(3)                    = 0
[pid  5848] close(4)                    = 0
[pid  5847] <... munmap resumed>)       = 0
[   90.406424][ T5845] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[   90.406444][ T5845] Call Trace:
[   90.406453][ T5845]  <TASK>
[   90.406462][ T5845]  dump_stack_lvl+0x189/0x250
[   90.406508][ T5845]  ? kernfs_path_from_node+0x2c/0x260
[   90.406543][ T5845]  ? __pfx_dump_stack_lvl+0x10/0x10
[   90.406564][ T5845]  ? __pfx__printk+0x10/0x10
[   90.406589][ T5845]  ? kernfs_path_from_node+0x2c/0x260
[   90.406615][ T5845]  ? kernfs_path_from_node+0x2c/0x260
[   90.406652][ T5845]  ? kernfs_path_from_node+0x22c/0x260
[   90.406679][ T5845]  ? kernfs_path_from_node+0x2c/0x260
[   90.406710][ T5845]  sysfs_create_dir_ns+0x259/0x280
[   90.406741][ T5845]  ? __pfx_sysfs_create_dir_ns+0x10/0x10
[   90.406771][ T5845]  ? do_raw_spin_unlock+0x122/0x240
[   90.406802][ T5845]  kobject_add_internal+0x59f/0xb40
[   90.406852][ T5845]  kobject_init_and_add+0x125/0x190
[   90.406892][ T5845]  ? __pfx_kobject_init_and_add+0x10/0x10
[   90.406926][ T5845]  ? __raw_spin_lock_init+0x45/0x100
[   90.406952][ T5845]  ? __init_swait_queue_head+0xa9/0x150
[pid  5848] mkdir("./file1", 0777 <unfinished ...>
[pid  5850] <... munmap resumed>)       = 0
[pid  5848] <... mkdir resumed>)        = -1 EEXIST (File exists)
[pid  5847] openat(AT_FDCWD, "/dev/loop2", O_RDWR <unfinished ...>
[pid  5850] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4
[pid  5850] ioctl(4, LOOP_SET_FD, 3 <unfinished ...>
[pid  5848] mount("/dev/loop4", "./file1", "gfs2", MS_NODIRATIME|MS_STRICTATIME, "quota_quantum=0x0000000000000004,suiddir,quota,barrier,acl,quota=off,discard,noloccookie,quota=on,lo"... <unfinished ...>
[pid  5847] <... openat resumed>)       = 4
[   90.406982][ T5845]  gfs2_sys_fs_add+0x237/0x470
[   90.407020][ T5845]  ? __pfx_gfs2_sys_fs_add+0x10/0x10
[   90.407061][ T5845]  ? is_dynamic_key+0xd6/0x1c0
[   90.407089][ T5845]  ? __pfx_alloc_workqueue+0x10/0x10
[   90.407131][ T5845]  gfs2_fill_super+0x1348/0x2010
[   90.407176][ T5845]  ? __pfx_gfs2_fill_super+0x10/0x10
[   90.407208][ T5845]  ? sb_set_blocksize+0x104/0x180
[   90.407239][ T5845]  ? setup_bdev_super+0x4c1/0x5b0
[   90.407265][ T5845]  get_tree_bdev_flags+0x40e/0x4d0
[   90.407288][ T5845]  ? __pfx_gfs2_fill_super+0x10/0x10
[   90.407314][ T5845]  ? __pfx_get_tree_bdev_flags+0x10/0x10
[   90.407338][ T5845]  ? rcu_is_watching+0x15/0xb0
[   90.407366][ T5845]  gfs2_get_tree+0x51/0x1e0
[   90.407396][ T5845]  vfs_get_tree+0x92/0x2b0
[   90.407422][ T5845]  do_new_mount+0x24a/0xa40
[   90.407457][ T5845]  __se_sys_mount+0x317/0x410
[   90.407490][ T5845]  ? __pfx___se_sys_mount+0x10/0x10
[   90.407513][ T5845]  ? rcu_is_watching+0x15/0xb0
[   90.407540][ T5845]  ? __x64_sys_mount+0x20/0xc0
[   90.407568][ T5845]  do_syscall_64+0xfa/0x3b0
[   90.407597][ T5845]  ? lockdep_hardirqs_on+0x9c/0x150
[   90.407633][ T5845]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   90.407654][ T5845]  ? clear_bhb_loop+0x60/0xb0
[   90.407679][ T5845]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   90.407700][ T5845] RIP: 0033:0x7fe87c3b2f1a
[   90.407723][ T5845] 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
[   90.407745][ T5845] RSP: 002b:00007ffc9a7719b8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
[   90.407767][ T5845] RAX: ffffffffffffffda RBX: 00007ffc9a7719d0 RCX: 00007fe87c3b2f1a
[   90.407783][ T5845] RDX: 0000200000000240 RSI: 0000200000001c00 RDI: 00007ffc9a7719d0
[   90.407797][ T5845] RBP: 0000200000001c00 R08: 00007ffc9a771a10 R09: 00000000000125dc
[   90.407811][ T5845] R10: 0000000001000800 R11: 0000000000000282 R12: 0000200000000240
[   90.407825][ T5845] R13: 00007ffc9a771a10 R14: 0000000000000003 R15: 0000000001000800
[   90.407858][ T5845]  </TASK>
[   90.407888][ T5845] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[   90.477667][ T5843] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[   90.516993][ T5850] loop3: detected capacity change from 0 to 32768
[   90.519752][ T5845] gfs2: fsid=syz:syz: error -17 adding sysfs files
[   90.558063][ T5847] loop2: detected capacity change from 0 to 32768
[   90.603307][ T5845] ==================================================================
[   90.767498][ T5845] BUG: KASAN: null-ptr-deref in gfs2_drop_inode+0x20c/0x3a0
[   90.774812][ T5845] Read of size 8 at addr 00000000000000a8 by task syz-executor115/5845
[   90.783054][ T5845] 
[   90.785384][ T5845] CPU: 1 UID: 0 PID: 5845 Comm: syz-executor115 Not tainted 6.15.0-next-20250528-syzkaller #0 PREEMPT(full) 
[   90.785405][ T5845] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[   90.785416][ T5845] Call Trace:
[   90.785424][ T5845]  <TASK>
[   90.785433][ T5845]  dump_stack_lvl+0x189/0x250
[   90.785452][ T5845]  ? __pfx_dump_stack_lvl+0x10/0x10
[   90.785468][ T5845]  ? _raw_spin_lock_irqsave+0xb3/0xf0
[   90.785493][ T5845]  ? gfs2_drop_inode+0x20c/0x3a0
[   90.785519][ T5845]  ? gfs2_drop_inode+0x20c/0x3a0
[   90.785544][ T5845]  kasan_report+0x118/0x150
[   90.785565][ T5845]  ? gfs2_drop_inode+0x20c/0x3a0
[   90.785593][ T5845]  kasan_check_range+0x2b0/0x2c0
[   90.785614][ T5845]  gfs2_drop_inode+0x20c/0x3a0
[   90.785640][ T5845]  iput+0x45a/0x9d0
[   90.785665][ T5845]  gfs2_fill_super+0x1418/0x2010
[   90.785698][ T5845]  ? __pfx_gfs2_fill_super+0x10/0x10
[   90.785725][ T5845]  ? sb_set_blocksize+0x104/0x180
[   90.785752][ T5845]  ? setup_bdev_super+0x4c1/0x5b0
[   90.785771][ T5845]  get_tree_bdev_flags+0x40e/0x4d0
[   90.785795][ T5845]  ? __pfx_gfs2_fill_super+0x10/0x10
[   90.785816][ T5845]  ? __pfx_get_tree_bdev_flags+0x10/0x10
[   90.785833][ T5845]  ? rcu_is_watching+0x15/0xb0
[   90.785851][ T5845]  gfs2_get_tree+0x51/0x1e0
[   90.785873][ T5845]  vfs_get_tree+0x92/0x2b0
[   90.785891][ T5845]  do_new_mount+0x24a/0xa40
[   90.785914][ T5845]  __se_sys_mount+0x317/0x410
[   90.785937][ T5845]  ? __pfx___se_sys_mount+0x10/0x10
[   90.785956][ T5845]  ? rcu_is_watching+0x15/0xb0
[   90.785974][ T5845]  ? __x64_sys_mount+0x20/0xc0
[   90.785994][ T5845]  do_syscall_64+0xfa/0x3b0
[   90.786020][ T5845]  ? lockdep_hardirqs_on+0x9c/0x150
[   90.786043][ T5845]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   90.786059][ T5845]  ? clear_bhb_loop+0x60/0xb0
[   90.786078][ T5845]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   90.786095][ T5845] RIP: 0033:0x7fe87c3b2f1a
[   90.786111][ T5845] 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
[   90.786126][ T5845] RSP: 002b:00007ffc9a7719b8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
[   90.786143][ T5845] RAX: ffffffffffffffda RBX: 00007ffc9a7719d0 RCX: 00007fe87c3b2f1a
[   90.786156][ T5845] RDX: 0000200000000240 RSI: 0000200000001c00 RDI: 00007ffc9a7719d0
[   90.786169][ T5845] RBP: 0000200000001c00 R08: 00007ffc9a771a10 R09: 00000000000125dc
[pid  5847] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5847] close(3)                    = 0
[pid  5847] close(4)                    = 0
[pid  5847] mkdir("./file1", 0777)      = -1 EEXIST (File exists)
[   90.786180][ T5845] R10: 0000000001000800 R11: 0000000000000282 R12: 0000200000000240
[   90.786192][ T5845] R13: 00007ffc9a771a10 R14: 0000000000000003 R15: 0000000001000800
[   90.786210][ T5845]  </TASK>
[   90.786216][ T5845] ==================================================================
[   91.045847][ T5845] Kernel panic - not syncing: KASAN: panic_on_warn set ...
[   91.053076][ T5845] CPU: 1 UID: 0 PID: 5845 Comm: syz-executor115 Not tainted 6.15.0-next-20250528-syzkaller #0 PREEMPT(full) 
[   91.064652][ T5845] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[   91.074748][ T5845] Call Trace:
[   91.078062][ T5845]  <TASK>
[   91.081023][ T5845]  dump_stack_lvl+0x99/0x250
[   91.085651][ T5845]  ? __asan_memcpy+0x40/0x70
[   91.090289][ T5845]  ? __pfx_dump_stack_lvl+0x10/0x10
[   91.095535][ T5845]  ? __pfx__printk+0x10/0x10
[   91.100169][ T5845]  panic+0x2db/0x790
[   91.104120][ T5845]  ? lockdep_hardirqs_on+0x9c/0x150
[   91.109364][ T5845]  ? __pfx_panic+0x10/0x10
[   91.113830][ T5845]  ? _raw_spin_unlock_irqrestore+0xa8/0x110
[   91.119772][ T5845]  ? _raw_spin_unlock_irqrestore+0xad/0x110
[   91.125701][ T5845]  ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10
[   91.132070][ T5845]  ? gfs2_drop_inode+0x20c/0x3a0
[   91.137053][ T5845]  check_panic_on_warn+0x89/0xb0
[   91.142038][ T5845]  ? gfs2_drop_inode+0x20c/0x3a0
[   91.147028][ T5845]  end_report+0x78/0x160
[   91.151309][ T5845]  kasan_report+0x129/0x150
[   91.155848][ T5845]  ? gfs2_drop_inode+0x20c/0x3a0
[   91.160831][ T5845]  kasan_check_range+0x2b0/0x2c0
[   91.165874][ T5845]  gfs2_drop_inode+0x20c/0x3a0
[   91.170657][ T5845]  iput+0x45a/0x9d0
[   91.174480][ T5845]  gfs2_fill_super+0x1418/0x2010
[   91.179444][ T5845]  ? __pfx_gfs2_fill_super+0x10/0x10
[   91.184760][ T5845]  ? sb_set_blocksize+0x104/0x180
[   91.189822][ T5845]  ? setup_bdev_super+0x4c1/0x5b0
[   91.194864][ T5845]  get_tree_bdev_flags+0x40e/0x4d0
[   91.199986][ T5845]  ? __pfx_gfs2_fill_super+0x10/0x10
[   91.205314][ T5845]  ? __pfx_get_tree_bdev_flags+0x10/0x10
[   91.210955][ T5845]  ? rcu_is_watching+0x15/0xb0
[   91.215731][ T5845]  gfs2_get_tree+0x51/0x1e0
[   91.220249][ T5845]  vfs_get_tree+0x92/0x2b0
[   91.224699][ T5845]  do_new_mount+0x24a/0xa40
[   91.229232][ T5845]  __se_sys_mount+0x317/0x410
[   91.233934][ T5845]  ? __pfx___se_sys_mount+0x10/0x10
[   91.239150][ T5845]  ? rcu_is_watching+0x15/0xb0
[   91.243926][ T5845]  ? __x64_sys_mount+0x20/0xc0
[   91.248703][ T5845]  do_syscall_64+0xfa/0x3b0
[   91.253223][ T5845]  ? lockdep_hardirqs_on+0x9c/0x150
[   91.258436][ T5845]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   91.264510][ T5845]  ? clear_bhb_loop+0x60/0xb0
[   91.269196][ T5845]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   91.275097][ T5845] RIP: 0033:0x7fe87c3b2f1a
[   91.279523][ T5845] 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
[   91.299144][ T5845] RSP: 002b:00007ffc9a7719b8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
[   91.307568][ T5845] RAX: ffffffffffffffda RBX: 00007ffc9a7719d0 RCX: 00007fe87c3b2f1a
[   91.315553][ T5845] RDX: 0000200000000240 RSI: 0000200000001c00 RDI: 00007ffc9a7719d0
[   91.323534][ T5845] RBP: 0000200000001c00 R08: 00007ffc9a771a10 R09: 00000000000125dc
[   91.331517][ T5845] R10: 0000000001000800 R11: 0000000000000282 R12: 0000200000000240
[   91.339496][ T5845] R13: 00007ffc9a771a10 R14: 0000000000000003 R15: 0000000001000800
[   91.347480][ T5845]  </TASK>
[   91.350838][ T5845] Kernel Offset: disabled
[   91.355165][ T5845] Rebooting in 86400 seconds..