syzkaller syzkaller login: [ 13.784016][ T23] kauditd_printk_skb: 60 callbacks suppressed [ 13.784022][ T23] audit: type=1400 audit(1645635187.190:71): avc: denied { transition } for pid=289 comm="sshd" path="/bin/sh" dev="sda1" ino=73 scontext=system_u:system_r:initrc_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 13.789928][ T23] audit: type=1400 audit(1645635187.190:72): avc: denied { write } for pid=289 comm="sh" path="pipe:[11315]" dev="pipefs" ino=11315 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 14.762658][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #280!!! [ 19.102718][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #280!!! [ 19.182663][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #82!!! [ 19.192031][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #82!!! Warning: Permanently added '10.128.0.186' (ECDSA) to the list of known hosts. executing program [ 24.586845][ T23] audit: type=1400 audit(1645635197.990:73): avc: denied { execmem } for pid=364 comm="syz-executor982" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.595996][ T364] incfs: Backing dir is not set, filesystem can't be mounted. [ 24.609776][ T23] audit: type=1400 audit(1645635197.990:74): avc: denied { mounton } for pid=364 comm="syz-executor982" path="/root/file0" dev="sda1" ino=1137 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 24.614026][ T364] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 24.636368][ T23] audit: type=1400 audit(1645635197.990:75): avc: denied { mount } for pid=364 comm="syz-executor982" name="/" dev="9p" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [ 24.648004][ T364] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 24.648014][ T364] CPU: 0 PID: 364 Comm: syz-executor982 Not tainted 5.10.101-syzkaller-00043-gadd227a8d80c #0 [ 24.648019][ T364] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.648045][ T364] RIP: 0010:incfs_kill_sb+0x59/0x130 [ 24.648061][ T364] Code: c1 ef 03 43 80 3c 27 00 74 08 4c 89 f7 e8 bf 7e 9c ff 4d 8b 2e 49 8d 5d 10 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 99 7e 9c ff 48 8b 1b 48 83 c3 30 48 [ 24.670404][ T23] audit: type=1400 audit(1645635197.990:76): avc: denied { mounton } for pid=364 comm="syz-executor982" path="/root/file0" dev="9p" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 24.678529][ T364] RSP: 0018:ffffc9000022fab0 EFLAGS: 00010202 [ 24.678540][ T364] RAX: 0000000000000002 RBX: 0000000000000010 RCX: dffffc0000000000 [ 24.678547][ T364] RDX: 0000000000000000 RSI: ffffc9000022fa58 RDI: ffff8881075b2000 [ 24.678552][ T364] RBP: ffffc9000022fae0 R08: dffffc0000000000 R09: 0000000000000003 [ 24.678564][ T364] R10: fffff52000045ec5 R11: 0000000000000004 R12: dffffc0000000000 [ 24.783967][ T364] R13: 0000000000000000 R14: ffff8881075b23c8 R15: 1ffff11020eb6479 [ 24.791913][ T364] FS: 0000555556ade300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 24.800809][ T364] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.807367][ T364] CR2: 00005630b6567088 CR3: 000000011d10c000 CR4: 00000000003506b0 [ 24.815313][ T364] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.823256][ T364] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.831215][ T364] Call Trace: [ 24.834477][ T364] deactivate_locked_super+0xb0/0x100 [ 24.839824][ T364] incfs_mount_fs+0x859/0x950 [ 24.844471][ T364] ? incfs_unlink+0x80/0x80 [ 24.848959][ T364] ? selinux_capable+0x39/0x50 [ 24.853694][ T364] legacy_get_tree+0xf0/0x190 [ 24.858338][ T364] ? incfs_unlink+0x80/0x80 [ 24.862809][ T364] vfs_get_tree+0x89/0x270 [ 24.867195][ T364] path_mount+0x1975/0x2ab0 [ 24.871668][ T364] ? mark_mounts_for_expiry+0x4b0/0x4b0 [ 24.877192][ T364] ? getname_flags+0x207/0x650 [ 24.882015][ T364] ? user_path_at_empty+0x40/0x50 [ 24.887113][ T364] __se_sys_mount+0x2f7/0x3b0 [ 24.891760][ T364] ? __x64_sys_mount+0xd0/0xd0 [ 24.896493][ T364] __x64_sys_mount+0xbf/0xd0 [ 24.901052][ T364] do_syscall_64+0x31/0x70 [ 24.905439][ T364] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 24.911297][ T364] RIP: 0033:0x7f89379374b9 [ 24.915682][ T364] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 24.935257][ T364] RSP: 002b:00007fff62ab5928 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 24.943873][ T364] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f89379374b9 [ 24.951992][ T364] RDX: 0000000020000200 RSI: 0000000020000040 RDI: 0000000000000000 [ 24.959934][ T364] RBP: 00007f89378fb210 R08: 0000000000000000 R09: 0000000000000000 [ 24.967877][ T364] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f89378fb2a0 [ 24.975823][ T364] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 24.983766][ T364] Modules linked in: [ 24.987789][ T364] ---[ end trace 7b38775908979bfd ]--- [ 24.993299][ T364] RIP: 0010:incfs_kill_sb+0x59/0x130 [ 24.998556][ T364] Code: c1 ef 03 43 80 3c 27 00 74 08 4c 89 f7 e8 bf 7e 9c ff 4d 8b 2e 49 8d 5d 10 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 99 7e 9c ff 48 8b 1b 48 83 c3 30 48 [ 25.018303][ T364] RSP: 0018:ffffc9000022fab0 EFLAGS: 00010202 [ 25.024392][ T364] RAX: 0000000000000002 RBX: 0000000000000010 RCX: dffffc0000000000 [ 25.032347][ T364] RDX: 0000000000000000 RSI: ffffc9000022fa58 RDI: ffff8881075b2000 [ 25.040325][ T364] RBP: ffffc9000022fae0 R08: dffffc0000000000 R09: 0000000000000003 [ 25.048305][ T364] R10: fffff52000045ec5 R11: 0000000000000004 R12: dffffc0000000000 [ 25.056273][ T364] R13: 0000000000000000 R14: ffff8881075b23c8 R15: 1ffff11020eb6479 [ 25.064246][ T364] FS: 0000555556ade300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 25.073171][ T364] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.079733][ T364] CR2: 00005630b6567088 CR3: 000000011d10c000 CR4: 00000000003506b0 [ 25.087711][ T364] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.095680][ T364] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.103660][ T364] Kernel panic - not syncing: Fatal exception [ 25.109866][ T364] Kernel Offset: disabled [ 25.114172][ T364] Rebooting in 86400 seconds..