[ 15.726583][ T3892] 8021q: adding VLAN 0 to HW filter on device bond0 [ 15.732308][ T3892] eql: remember to turn off Van-Jacobson compression on your slave devices [ 15.775983][ T83] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 15.782240][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.158' (ECDSA) to the list of known hosts. syzkaller login: [ 36.994302][ T4224] loop4: detected capacity change from 0 to 512 executing program executing program executing program executing program executing program executing program [ 37.021223][ T4223] loop5: detected capacity change from 0 to 512 [ 37.025763][ T4225] loop1: detected capacity change from 0 to 512 [ 37.030414][ T4226] loop0: detected capacity change from 0 to 512 [ 37.044622][ T4227] loop2: detected capacity change from 0 to 512 [ 37.047194][ T4229] loop3: detected capacity change from 0 to 512 [ 37.075662][ T4225] EXT4-fs (loop1): mounted filesystem without journal. Quota mode: writeback. [ 37.076971][ T4229] EXT4-fs (loop3): mounted filesystem without journal. Quota mode: writeback. [ 37.087242][ T4223] EXT4-fs (loop5): mounted filesystem without journal. Quota mode: writeback. [ 37.087944][ T4227] EXT4-fs (loop2): mounted filesystem without journal. Quota mode: writeback. [ 37.090445][ T4224] EXT4-fs (loop4): mounted filesystem without journal. Quota mode: writeback. [ 37.102020][ T4226] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: writeback. [ 37.139666][ T4229] EXT4-fs (loop3): re-mounted. Quota mode: writeback. [ 37.144065][ T4229] ======================================================= [ 37.144065][ T4229] WARNING: The mand mount option has been deprecated and [ 37.144065][ T4229] and is ignored by this kernel. Remove the mand [ 37.144065][ T4229] option from the mount to silence this warning. [ 37.144065][ T4229] ======================================================= [ 37.158505][ T4224] EXT4-fs (loop4): re-mounted. Quota mode: writeback. [ 37.160705][ T4225] EXT4-fs (loop1): re-mounted. Quota mode: writeback. [ 37.162751][ T4226] EXT4-fs (loop0): re-mounted. Quota mode: writeback. [ 37.167037][ T4227] EXT4-fs (loop2): re-mounted. Quota mode: writeback. [ 37.180499][ T4226] EXT4-fs (loop0): re-mounted. Quota mode: writeback. [ 37.180706][ T4227] EXT4-fs (loop2): re-mounted. Quota mode: writeback. [ 37.182490][ T4224] EXT4-fs (loop4): re-mounted. Quota mode: writeback. [ 37.186746][ T4229] EXT4-fs (loop3): re-mounted. Quota mode: writeback. [ 37.189036][ T4225] EXT4-fs (loop1): re-mounted. Quota mode: writeback. [ 37.192242][ T4223] EXT4-fs (loop0): re-mounted. Quota mode: writeback. executing program executing program [ 37.211387][ T4251] executing program [ 37.211992][ T4251] ====================================================== [ 37.213779][ T4251] WARNING: possible circular locking dependency detected [ 37.215438][ T4251] 6.1.26-syzkaller #0 Not tainted [ 37.216586][ T4251] ------------------------------------------------------ [ 37.218307][ T4251] syz-executor343/4251 is trying to acquire lock: [ 37.219902][ T4251] ffff0000d828c0e0 (&type->s_umount_key#30){++++}-{3:3}, at: __arm64_sys_quotactl_fd+0x30c/0x4a4 [ 37.222522][ T4251] [ 37.222522][ T4251] but task is already holding lock: [ 37.224374][ T4251] ffff0000d828c460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c [ 37.226559][ T4251] [ 37.226559][ T4251] which lock already depends on the new lock. [ 37.226559][ T4251] executing program [ 37.229051][ T4251] [ 37.229051][ T4251] the existing dependency chain (in reverse order) is: [ 37.231273][ T4251] [ 37.231273][ T4251] -> #1 (sb_writers#3){.+.+}-{0:0}: [ 37.233079][ T4251] write_mmp_block+0x100/0xb8c [ 37.234427][ T4251] ext4_multi_mount_protect+0x2e0/0x8a4 [ 37.235980][ T4251] ext4_reconfigure+0x218c/0x2934 [ 37.237288][ T4251] reconfigure_super+0x328/0x738 [ 37.238679][ T4251] path_mount+0xc6c/0xe58 [ 37.239848][ T4251] __arm64_sys_mount+0x45c/0x594 [ 37.241164][ T4251] invoke_syscall+0x98/0x2c0 [ 37.242374][ T4251] el0_svc_common+0x138/0x258 [ 37.243685][ T4251] do_el0_svc+0x64/0x218 [ 37.244852][ T4251] el0_svc+0x58/0x168 [ 37.245946][ T4251] el0t_64_sync_handler+0x84/0xf0 [ 37.247320][ T4251] el0t_64_sync+0x18c/0x190 [ 37.248614][ T4251] [ 37.248614][ T4251] -> #0 (&type->s_umount_key#30){++++}-{3:3}: executing program [ 37.250681][ T4251] __lock_acquire+0x3338/0x764c [ 37.251942][ T4251] lock_acquire+0x26c/0x7cc [ 37.253312][ T4251] down_read+0x5c/0x78 [ 37.254459][ T4251] __arm64_sys_quotactl_fd+0x30c/0x4a4 [ 37.255942][ T4251] invoke_syscall+0x98/0x2c0 [ 37.257129][ T4251] el0_svc_common+0x138/0x258 [ 37.258416][ T4251] do_el0_svc+0x64/0x218 [ 37.259603][ T4251] el0_svc+0x58/0x168 [ 37.260766][ T4251] el0t_64_sync_handler+0x84/0xf0 [ 37.262045][ T4251] el0t_64_sync+0x18c/0x190 [ 37.263297][ T4251] [ 37.263297][ T4251] other info that might help us debug this: [ 37.263297][ T4251] [ 37.265905][ T4251] Possible unsafe locking scenario: [ 37.265905][ T4251] [ 37.267701][ T4251] CPU0 CPU1 [ 37.268970][ T4251] ---- ---- [ 37.270298][ T4251] lock(sb_writers#3); [ 37.271276][ T4251] lock(&type->s_umount_key#30); [ 37.273251][ T4251] lock(sb_writers#3); [ 37.274865][ T4251] lock(&type->s_umount_key#30); [ 37.276201][ T4251] [ 37.276201][ T4251] *** DEADLOCK *** [ 37.276201][ T4251] executing program [ 37.278234][ T4251] 1 lock held by syz-executor343/4251: [ 37.279493][ T4251] #0: ffff0000d828c460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c [ 37.281784][ T4251] [ 37.281784][ T4251] stack backtrace: [ 37.283265][ T4251] CPU: 1 PID: 4251 Comm: syz-executor343 Not tainted 6.1.26-syzkaller #0 [ 37.285309][ T4251] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 [ 37.287863][ T4251] Call trace: [ 37.288640][ T4251] dump_backtrace+0x1c8/0x1f4 [ 37.289739][ T4251] show_stack+0x2c/0x3c [ 37.290766][ T4251] dump_stack_lvl+0x108/0x170 [ 37.291935][ T4251] dump_stack+0x1c/0x5c [ 37.292948][ T4251] print_circular_bug+0x150/0x1b8 [ 37.294217][ T4251] check_noncircular+0x2cc/0x378 [ 37.295440][ T4251] __lock_acquire+0x3338/0x764c [ 37.296649][ T4251] lock_acquire+0x26c/0x7cc [ 37.297787][ T4251] down_read+0x5c/0x78 executing program [ 37.298781][ T4251] __arm64_sys_quotactl_fd+0x30c/0x4a4 [ 37.300165][ T4251] invoke_syscall+0x98/0x2c0 [ 37.301385][ T4251] el0_svc_common+0x138/0x258 [ 37.302517][ T4251] do_el0_svc+0x64/0x218 [ 37.303527][ T4251] el0_svc+0x58/0x168 [ 37.304517][ T4251] el0t_64_sync_handler+0x84/0xf0 [ 37.305709][ T4251] el0t_64_sync+0x18c/0x190 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program