[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[ 11.346621] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. D[ 12.475601] random: crng init done ebian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.94' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 41.113261] ------------[ cut here ]------------ [ 41.114258] WARNING: CPU: 0 PID: 2062 at fs/attr.c:211 notify_change2+0xae2/0xd90 [ 41.115428] Kernel panic - not syncing: panic_on_warn set ... [ 41.115428] [ 41.116463] CPU: 0 PID: 2062 Comm: syz-executor189 Not tainted 4.9.168+ #39 [ 41.117578] ffff8801ce41f430 ffffffff81b4f5d1 0000000000000000 ffffffff82a39ba0 [ 41.118913] 00000000ffffffff 0000000000000000 0000000000000009 ffff8801ce41f510 [ 41.120264] ffffffff813f945a 0000000041b58ab3 ffffffff82e2ec5a ffffffff813f9281 [ 41.121859] Call Trace: [ 41.122290] [<00000000ba468a73>] dump_stack+0xc1/0x120 [ 41.123215] [<00000000ac682659>] panic+0x1d9/0x3bd [ 41.123992] [<00000000478d5baf>] ? add_taint.cold+0x16/0x16 [ 41.125074] [<000000001f75ded7>] ? shmem_xattr_handler_get+0x3e/0x50 [ 41.126153] [<00000000665054c5>] ? __warn.cold+0x14/0x2f [ 41.127124] [<0000000010c8e414>] ? notify_change2+0xae2/0xd90 [ 41.128016] [<0000000056e31a57>] __warn.cold+0x2f/0x2f [ 41.128913] [<00000000bce12bbe>] warn_slowpath_null+0x2d/0x40 [ 41.129850] [<0000000010c8e414>] notify_change2+0xae2/0xd90 [ 41.130712] [<00000000b18d91ea>] file_remove_privs+0x285/0x4b0 [ 41.131569] [<00000000ce7b274e>] ? dentry_needs_remove_privs.part.0+0x60/0x60 [ 41.132809] [<0000000012a7274e>] ? depot_save_stack+0x13c/0x4a0 [ 41.136466] [<000000000a49a044>] ? kasan_kmalloc.part.0+0xc6/0xf0 [ 41.142765] [<00000000812e9eb1>] ? save_stack_trace+0x16/0x20 [ 41.148737] [<0000000025b0885b>] ? kasan_kmalloc.part.0+0x62/0xf0 [ 41.155057] [<000000004a1d169a>] ? kasan_kmalloc+0xb7/0xd0 [ 41.160763] [<00000000b687fb30>] __generic_file_write_iter+0x157/0x530 [ 41.167517] [<0000000053a6e299>] ? entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 41.174612] [<000000007c489216>] blkdev_write_iter+0x1bb/0x370 [ 41.180663] [<0000000026017d96>] ? current_kernel_time64+0xbc/0x110 [ 41.187142] [<00000000bdc6cdb1>] ? current_time+0x16/0xd0 [ 41.192757] [<00000000d78a9ffe>] ? bd_acquire+0x250/0x250 [ 41.198367] [<00000000efd71aaa>] ? current_time+0x8a/0xd0 [ 41.203976] [<00000000a48d613e>] vfs_iter_write+0x2e2/0x580 [ 41.209762] [<00000000eb45aef2>] ? do_iter_readv_writev+0x4b0/0x4b0 [ 41.216254] [<0000000003786293>] ? kasan_unpoison_shadow+0x35/0x50 [ 41.222668] [<00000000579c69c8>] ? splice_from_pipe_next.part.0+0x1e9/0x290 [ 41.229846] [<000000007e431253>] ? __kmalloc+0x133/0x320 [ 41.235762] [<00000000116be576>] iter_file_splice_write+0x5a9/0xb10 [ 41.242893] [<00000000e933c2f9>] ? __atime_needs_update+0x950/0x950 [ 41.249481] [<000000000871b55b>] ? vmsplice_to_user+0x1e0/0x1e0 [ 41.255618] [<00000000020d884a>] ? selinux_file_permission+0x85/0x470 [ 41.262277] [<0000000098c4b5c1>] ? security_file_permission+0x8f/0x1f0 [ 41.269025] [<000000007cb09113>] ? rw_verify_area+0xea/0x2b0 [ 41.274914] [<000000000871b55b>] ? vmsplice_to_user+0x1e0/0x1e0 [ 41.281041] [<00000000d19489c9>] direct_splice_actor+0x126/0x1a0 [ 41.287256] [<00000000589e8b87>] splice_direct_to_actor+0x2c8/0x820 [ 41.293755] [<00000000609f5c2b>] ? generic_pipe_buf_nosteal+0x10/0x10 [ 41.300684] [<00000000c5782d77>] ? do_splice_to+0x170/0x170 [ 41.306637] [<0000000098c4b5c1>] ? security_file_permission+0x8f/0x1f0 [ 41.313407] [<000000007cb09113>] ? rw_verify_area+0xea/0x2b0 [ 41.319687] [<00000000a3165c12>] do_splice_direct+0x1a5/0x260 [ 41.325652] [<00000000905e68f1>] ? splice_direct_to_actor+0x820/0x820 [ 41.332481] [<00000000020d884a>] ? selinux_file_permission+0x85/0x470 [ 41.339151] [<0000000098c4b5c1>] ? security_file_permission+0x8f/0x1f0 [ 41.345889] [<000000007cb09113>] ? rw_verify_area+0xea/0x2b0 [ 41.351766] [<00000000e466a664>] do_sendfile+0x503/0xc00 [ 41.358015] [<000000000324a162>] ? do_compat_pwritev64+0x180/0x180 [ 41.373784] [<00000000ffb70176>] ? SyS_futex+0x25f/0x360 [ 41.379317] [<000000004dc8e426>] ? __fget+0x22f/0x370 [ 41.384576] [<0000000085455c91>] ? __fget+0x47/0x370 [ 41.389750] [<00000000d51a4bc2>] SyS_sendfile64+0x145/0x160 [ 41.395533] [<0000000084001f41>] ? SyS_sendfile+0x160/0x160 [ 41.401314] [<000000005dc5a33f>] ? do_syscall_64+0x4a/0x570 [ 41.407117] [<0000000084001f41>] ? SyS_sendfile+0x160/0x160 [ 41.412959] [<000000001bcca029>] do_syscall_64+0x1ad/0x570 [ 41.418668] [<0000000053a6e299>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 41.425946] Kernel Offset: disabled [ 41.429592] Rebooting in 86400 seconds..