forked to background, child pid 193 Starting sshd: OK syzkaller syzkaller login: [ 14.028827][ T22] kauditd_printk_skb: 60 callbacks suppressed [ 14.028835][ T22] audit: type=1400 audit(1645780351.239:71): avc: denied { transition } for pid=266 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 [ 14.035192][ T22] audit: type=1400 audit(1645780351.239:72): avc: denied { write } for pid=266 comm="sh" path="pipe:[10083]" dev="pipefs" ino=10083 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 14.037479][ T266] sh (266) used greatest stack depth: 26280 bytes left Warning: Permanently added '10.128.1.79' (ECDSA) to the list of known hosts. executing program [ 20.412222][ T22] audit: type=1400 audit(1645780357.619:73): avc: denied { execmem } for pid=299 comm="syz-executor242" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.413997][ T300] incfs: Backing dir is not set, filesystem can't be mounted. [ 20.431766][ T22] audit: type=1400 audit(1645780357.619:74): avc: denied { mounton } for pid=300 comm="syz-executor242" path="/root/file0" dev="sda1" ino=1137 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 20.439127][ T300] kasan: CONFIG_KASAN_INLINE enabled [ 20.467121][ T300] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 20.475334][ T300] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 20.482381][ T300] CPU: 1 PID: 300 Comm: syz-executor242 Not tainted 5.4.161-syzkaller-00024-g7479ec62adf6 #0 [ 20.492498][ T300] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.502530][ T300] RIP: 0010:incfs_kill_sb+0x4c/0x100 [ 20.507789][ T300] Code: 8d b3 f0 03 00 00 4d 89 f7 49 c1 ef 03 41 80 3c 2f 00 74 08 4c 89 f7 e8 42 34 b2 ff 4d 8b 2e 49 8d 5d 10 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 26 34 b2 ff 48 8b 1b 48 83 c3 30 48 [ 20.527375][ T300] RSP: 0018:ffff8881de50fcb0 EFLAGS: 00010202 [ 20.533412][ T300] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff8881dea10fc0 [ 20.541368][ T300] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881e28a5000 [ 20.549399][ T300] RBP: dffffc0000000000 R08: ffffffff821f61f4 R09: ffffed103bca1f1e [ 20.557340][ T300] R10: ffffed103bca1f1e R11: 0000000000000000 R12: ffff8881e28a5000 [ 20.565296][ T300] R13: 0000000000000000 R14: ffff8881e28a53f0 R15: 1ffff1103c514a7e [ 20.573238][ T300] FS: 0000555557069300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 20.582138][ T300] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.588690][ T300] CR2: 0000000020000100 CR3: 00000001de94b000 CR4: 00000000003406e0 [ 20.596735][ T300] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.604691][ T300] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.612635][ T300] Call Trace: [ 20.616441][ T300] deactivate_locked_super+0xaf/0x100 [ 20.621792][ T300] incfs_mount_fs+0x772/0x840 [ 20.626446][ T300] legacy_get_tree+0xde/0x170 [ 20.631092][ T300] ? incfs_unlink+0x80/0x80 [ 20.635587][ T300] vfs_get_tree+0x83/0x260 [ 20.639972][ T300] do_mount+0x17be/0x2390 [ 20.644269][ T300] ? copy_mount_options+0xc9/0x300 [ 20.649363][ T300] ksys_mount+0xc2/0xf0 [ 20.653487][ T300] __x64_sys_mount+0xb1/0xc0 [ 20.658045][ T300] do_syscall_64+0xcb/0x1e0 [ 20.662579][ T300] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 20.668441][ T300] RIP: 0033:0x7fb3438c0d29 [ 20.672823][ T300] 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 [ 20.692493][ T300] RSP: 002b:00007ffd171e03b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 20.700867][ T300] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fb3438c0d29 [ 20.708805][ T300] RDX: 0000000020000200 RSI: 0000000020000040 RDI: 0000000000000000 [ 20.716756][ T300] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd171e0558 [ 20.724694][ T300] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb3438845b0 [ 20.732979][ T300] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 20.740928][ T300] Modules linked in: [ 20.745120][ T300] ---[ end trace 7be6f7d565ed4542 ]--- [ 20.750886][ T300] RIP: 0010:incfs_kill_sb+0x4c/0x100 [ 20.756165][ T300] Code: 8d b3 f0 03 00 00 4d 89 f7 49 c1 ef 03 41 80 3c 2f 00 74 08 4c 89 f7 e8 42 34 b2 ff 4d 8b 2e 49 8d 5d 10 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 08 48 89 df e8 26 34 b2 ff 48 8b 1b 48 83 c3 30 48 [ 20.775771][ T300] RSP: 0018:ffff8881de50fcb0 EFLAGS: 00010202 [ 20.781816][ T300] RAX: 0000000000000002 RBX: 0000000000000010 RCX: ffff8881dea10fc0 [ 20.789789][ T300] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881e28a5000 [ 20.797854][ T300] RBP: dffffc0000000000 R08: ffffffff821f61f4 R09: ffffed103bca1f1e [ 20.805917][ T300] R10: ffffed103bca1f1e R11: 0000000000000000 R12: ffff8881e28a5000 [ 20.813969][ T300] R13: 0000000000000000 R14: ffff8881e28a53f0 R15: 1ffff1103c514a7e [ 20.821943][ T300] FS: 0000555557069300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 20.830886][ T300] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.837506][ T300] CR2: 0000000020000100 CR3: 00000001de94b000 CR4: 00000000003406e0 [ 20.845681][ T300] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.853630][ T300] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.861607][ T300] Kernel panic - not syncing: Fatal exception [ 20.867825][ T300] Kernel Offset: disabled [ 20.872129][ T300] Rebooting in 86400 seconds..