syzkaller syzkaller login: [ 11.748433][ T23] kauditd_printk_skb: 60 callbacks suppressed [ 11.749518][ T23] audit: type=1400 audit(1645789385.199:71): avc: denied { transition } for pid=290 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 [ 11.754226][ T23] audit: type=1400 audit(1645789385.209:72): avc: denied { write } for pid=290 comm="sh" path="pipe:[10872]" dev="pipefs" ino=10872 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 11.898676][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #288!!! [ 11.900997][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08!!! [ 11.909213][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #88!!! [ 12.368564][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #80!!! Warning: Permanently added '10.128.0.165' (ECDSA) to the list of known hosts. executing program [ 20.772679][ T23] audit: type=1400 audit(1645789394.229:73): avc: denied { execmem } for pid=365 comm="syz-executor500" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.774590][ T366] incfs: Backing dir is not set, filesystem can't be mounted. [ 20.777394][ T23] audit: type=1400 audit(1645789394.229:74): avc: denied { mounton } for pid=366 comm="syz-executor500" path="/root/file0" dev="sda1" ino=1137 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 20.779137][ T366] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 20.785461][ T366] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 20.786867][ T366] CPU: 0 PID: 366 Comm: syz-executor500 Not tainted 5.10.102-syzkaller-00166-gcbfab5c59cf6 #0 [ 20.788588][ T366] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.790300][ T366] RIP: 0010:incfs_kill_sb+0x59/0x130 [ 20.791164][ T366] Code: c1 ef 03 43 80 3c 27 00 74 08 4c 89 f7 e8 4f 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 29 7e 9c ff 48 8b 1b 48 83 c3 30 48 [ 20.802078][ T366] RSP: 0018:ffffc90000bb7ab0 EFLAGS: 00010202 [ 20.808121][ T366] RAX: 0000000000000002 RBX: 0000000000000010 RCX: dffffc0000000000 [ 20.816070][ T366] RDX: 0000000000000000 RSI: ffffc90000bb7a58 RDI: ffff88811a012000 [ 20.824012][ T366] RBP: ffffc90000bb7ae0 R08: dffffc0000000000 R09: 0000000000000003 [ 20.831965][ T366] R10: fffff52000176ec5 R11: 0000000000000004 R12: dffffc0000000000 [ 20.839914][ T366] R13: 0000000000000000 R14: ffff88811a0123c8 R15: 1ffff11023402479 [ 20.847880][ T366] FS: 00005555567a6300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 20.856783][ T366] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.863340][ T366] CR2: 00005599c92800a8 CR3: 000000011c9b7000 CR4: 00000000003506b0 [ 20.871289][ T366] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.879231][ T366] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.887171][ T366] Call Trace: [ 20.890436][ T366] deactivate_locked_super+0xb0/0x100 [ 20.895790][ T366] incfs_mount_fs+0x859/0x950 [ 20.900557][ T366] ? incfs_unlink+0x80/0x80 [ 20.905030][ T366] ? selinux_capable+0x39/0x50 [ 20.909787][ T366] legacy_get_tree+0xf0/0x190 [ 20.914435][ T366] ? incfs_unlink+0x80/0x80 [ 20.918908][ T366] vfs_get_tree+0x89/0x270 [ 20.923294][ T366] path_mount+0x1975/0x2ab0 [ 20.927765][ T366] ? mark_mounts_for_expiry+0x4b0/0x4b0 [ 20.933288][ T366] ? getname_flags+0x207/0x650 [ 20.938019][ T366] ? user_path_at_empty+0x40/0x50 [ 20.943024][ T366] __se_sys_mount+0x2f7/0x3b0 [ 20.947672][ T366] ? __x64_sys_mount+0xd0/0xd0 [ 20.952417][ T366] __x64_sys_mount+0xbf/0xd0 [ 20.956981][ T366] do_syscall_64+0x31/0x70 [ 20.961387][ T366] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 20.967249][ T366] RIP: 0033:0x7f752344fd29 [ 20.971636][ T366] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 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 [ 20.991209][ T366] RSP: 002b:00007ffe8b50c928 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 20.999591][ T366] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f752344fd29 [ 21.007531][ T366] RDX: 0000000020000200 RSI: 0000000020000040 RDI: 0000000000000000 [ 21.015473][ T366] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe8b50cac8 [ 21.023413][ T366] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f75234135b0 [ 21.031354][ T366] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 21.039294][ T366] Modules linked in: [ 21.043286][ T366] ---[ end trace 519bf011b1e9a12a ]--- [ 21.048841][ T366] RIP: 0010:incfs_kill_sb+0x59/0x130 [ 21.054171][ T366] Code: c1 ef 03 43 80 3c 27 00 74 08 4c 89 f7 e8 4f 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 29 7e 9c ff 48 8b 1b 48 83 c3 30 48 [ 21.073978][ T366] RSP: 0018:ffffc90000bb7ab0 EFLAGS: 00010202 [ 21.080056][ T366] RAX: 0000000000000002 RBX: 0000000000000010 RCX: dffffc0000000000 [ 21.088015][ T366] RDX: 0000000000000000 RSI: ffffc90000bb7a58 RDI: ffff88811a012000 [ 21.095987][ T366] RBP: ffffc90000bb7ae0 R08: dffffc0000000000 R09: 0000000000000003 [ 21.103973][ T366] R10: fffff52000176ec5 R11: 0000000000000004 R12: dffffc0000000000 [ 21.111946][ T366] R13: 0000000000000000 R14: ffff88811a0123c8 R15: 1ffff11023402479 [ 21.119915][ T366] FS: 00005555567a6300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 21.128842][ T366] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.135426][ T366] CR2: 00005599c92800a8 CR3: 000000011c9b7000 CR4: 00000000003506b0 [ 21.143417][ T366] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.151403][ T366] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.159379][ T366] Kernel panic - not syncing: Fatal exception [ 21.165661][ T366] Kernel Offset: disabled [ 21.169968][ T366] Rebooting in 86400 seconds..