Warning: Permanently added '10.128.0.168' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.026814][ T5933] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5933 'syz-executor396' executing program executing program executing program [ 35.044993][ T5933] loop0: detected capacity change from 0 to 512 [ 35.046904][ T5934] loop2: detected capacity change from 0 to 512 [ 35.047541][ T5936] loop5: detected capacity change from 0 to 512 [ 35.048586][ T5935] loop3: detected capacity change from 0 to 512 executing program executing program [ 35.071617][ T5939] loop1: detected capacity change from 0 to 512 [ 35.076626][ T5938] loop4: detected capacity change from 0 to 512 [ 35.102183][ T5935] EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback. [ 35.105216][ T5933] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback. [ 35.108660][ T5934] EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback. [ 35.114446][ T5938] EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback. [ 35.122449][ T5939] EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback. [ 35.130985][ T5936] EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback. [ 35.151338][ T5933] EXT4-fs (loop0): re-mounted 00000000-0000-0000-0000-000000000000. Quota mode: writeback. [ 35.154929][ T5933] ======================================================= [ 35.154929][ T5933] WARNING: The mand mount option has been deprecated and [ 35.154929][ T5933] and is ignored by this kernel. Remove the mand [ 35.154929][ T5933] option from the mount to silence this warning. [ 35.154929][ T5933] ======================================================= [ 35.168808][ T5934] EXT4-fs (loop2): re-mounted 00000000-0000-0000-0000-000000000000. Quota mode: writeback. [ 35.169204][ T5938] EXT4-fs (loop4): re-mounted 00000000-0000-0000-0000-000000000000. Quota mode: writeback. [ 35.171353][ T5935] EXT4-fs (loop3): re-mounted 00000000-0000-0000-0000-000000000000. Quota mode: writeback. [ 35.173850][ T5939] EXT4-fs (loop1): re-mounted 00000000-0000-0000-0000-000000000000. Quota mode: writeback. [ 35.178632][ T5936] EXT4-fs (loop5): re-mounted 00000000-0000-0000-0000-000000000000. Quota mode: writeback. [ 35.193575][ T5936] EXT4-fs (loop5): re-mounted 00000000-0000-0000-0000-000000000000. Quota mode: writeback. [ 35.193978][ T5935] EXT4-fs (loop3): re-mounted 00000000-0000-0000-0000-000000000000. Quota mode: writeback. [ 35.199099][ T5934] EXT4-fs (loop2): re-mounted 00000000-0000-0000-0000-000000000000. Quota mode: writeback. [ 35.204011][ T5938] EXT4-fs (loop4): re-mounted 00000000-0000-0000-0000-000000000000. Quota mode: writeback. executing program [ 35.217466][ T5939] EXT4-fs (loop1): re-mounted 00000000-0000-0000-0000-000000000000. Quota mode: writeback. executing program executing program [ 35.233855][ T5933] EXT4-fs (loop0): re-mounted 00000000-0000-0000-0000-000000000000. Quota mode: writeback. [ 35.235214][ T5961] [ 35.236723][ T5961] ====================================================== [ 35.238374][ T5961] WARNING: possible circular locking dependency detected [ 35.240018][ T5961] 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Not tainted [ 35.241504][ T5961] ------------------------------------------------------ [ 35.243127][ T5961] syz-executor396/5961 is trying to acquire lock: [ 35.244569][ T5961] ffff0000d9e5c0e0 (&type->s_umount_key#29){++++}-{3:3}, at: __arm64_sys_quotactl_fd+0x30c/0x4a4 [ 35.246883][ T5961] [ 35.246883][ T5961] but task is already holding lock: [ 35.248594][ T5961] ffff0000d9e5c460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c [ 35.250508][ T5961] [ 35.250508][ T5961] which lock already depends on the new lock. [ 35.250508][ T5961] [ 35.252854][ T5961] [ 35.252854][ T5961] the existing dependency chain (in reverse order) is: [ 35.254808][ T5961] [ 35.254808][ T5961] -> #1 (sb_writers#3){.+.+}-{0:0}: [ 35.256434][ T5961] write_mmp_block+0xe4/0xb70 [ 35.257587][ T5961] ext4_multi_mount_protect+0x2f8/0x8c8 [ 35.258936][ T5961] ext4_reconfigure+0x2180/0x2928 [ 35.260217][ T5961] reconfigure_super+0x328/0x738 [ 35.261496][ T5961] path_mount+0xc0c/0xe04 [ 35.262651][ T5961] __arm64_sys_mount+0x45c/0x594 [ 35.263915][ T5961] invoke_syscall+0x98/0x2c0 [ 35.265153][ T5961] el0_svc_common+0x138/0x258 [ 35.266354][ T5961] do_el0_svc+0x64/0x198 [ 35.267462][ T5961] el0_svc+0x4c/0x15c [ 35.268500][ T5961] el0t_64_sync_handler+0x84/0xf0 [ 35.269763][ T5961] el0t_64_sync+0x190/0x194 [ 35.270883][ T5961] [ 35.270883][ T5961] -> #0 (&type->s_umount_key#29){++++}-{3:3}: [ 35.272795][ T5961] __lock_acquire+0x3338/0x764c [ 35.274030][ T5961] lock_acquire+0x238/0x718 [ 35.275152][ T5961] down_read+0x50/0x6c [ 35.276197][ T5961] __arm64_sys_quotactl_fd+0x30c/0x4a4 [ 35.277578][ T5961] invoke_syscall+0x98/0x2c0 executing program executing program executing program executing program executing program [ 35.278737][ T5961] el0_svc_common+0x138/0x258 [ 35.279966][ T5961] do_el0_svc+0x64/0x198 [ 35.281141][ T5961] el0_svc+0x4c/0x15c [ 35.282313][ T5961] el0t_64_sync_handler+0x84/0xf0 [ 35.283561][ T5961] el0t_64_sync+0x190/0x194 [ 35.284742][ T5961] [ 35.284742][ T5961] other info that might help us debug this: [ 35.284742][ T5961] [ 35.287135][ T5961] Possible unsafe locking scenario: [ 35.287135][ T5961] [ 35.288935][ T5961] CPU0 CPU1 [ 35.290164][ T5961] ---- ---- [ 35.291358][ T5961] lock(sb_writers#3); [ 35.292478][ T5961] lock(&type->s_umount_key#29); [ 35.294282][ T5961] lock(sb_writers#3); [ 35.295596][ T5961] lock(&type->s_umount_key#29); [ 35.296558][ T5961] [ 35.296558][ T5961] *** DEADLOCK *** [ 35.296558][ T5961] [ 35.298095][ T5961] 1 lock held by syz-executor396/5961: [ 35.299131][ T5961] #0: ffff0000d9e5c460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c [ 35.301347][ T5961] [ 35.301347][ T5961] stack backtrace: [ 35.302749][ T5961] CPU: 0 PID: 5961 Comm: syz-executor396 Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 [ 35.304992][ T5961] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 [ 35.307319][ T5961] Call trace: [ 35.308130][ T5961] dump_backtrace+0x1b8/0x1e4 [ 35.309259][ T5961] show_stack+0x2c/0x44 [ 35.310248][ T5961] dump_stack_lvl+0xd0/0x124 [ 35.311340][ T5961] dump_stack+0x1c/0x28 [ 35.312270][ T5961] print_circular_bug+0x150/0x1b8 [ 35.313579][ T5961] check_noncircular+0x2cc/0x378 [ 35.314722][ T5961] __lock_acquire+0x3338/0x764c [ 35.315808][ T5961] lock_acquire+0x238/0x718 [ 35.316827][ T5961] down_read+0x50/0x6c [ 35.317806][ T5961] __arm64_sys_quotactl_fd+0x30c/0x4a4 [ 35.319072][ T5961] invoke_syscall+0x98/0x2c0 [ 35.320100][ T5961] el0_svc_common+0x138/0x258 [ 35.321228][ T5961] do_el0_svc+0x64/0x198 [ 35.322208][ T5961] el0_svc+0x4c/0x15c [ 35.323144][ T5961] el0t_64_sync_handler+0x84/0xf0 [ 35.324289][ T5961] el0t_64_sync+0x190/0x194 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program