[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 11.720894] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 11.941805] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.28' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 60.975661] ------------[ cut here ]------------ [ 60.976930] WARNING: CPU: 1 PID: 2069 at fs/attr.c:211 notify_change2+0xae2/0xd90 [ 60.978042] Kernel panic - not syncing: panic_on_warn set ... [ 60.978042] [ 60.979090] CPU: 1 PID: 2069 Comm: syz-executor636 Not tainted 4.9.167+ #38 [ 60.980091] ffff8801cdd77430 ffffffff81b4f011 0000000000000000 ffffffff82a39ba0 [ 60.981588] 00000000ffffffff 0000000000000001 0000000000000009 ffff8801cdd77510 [ 60.982901] ffffffff813f91aa 0000000041b58ab3 ffffffff82e2ec1a ffffffff813f8fd1 [ 60.984369] Call Trace: [ 60.984776] [<000000005021a87c>] dump_stack+0xc1/0x120 [ 60.985619] [<0000000098ead4ad>] panic+0x1d9/0x3bd [ 60.986296] [<000000009cc8804b>] ? add_taint.cold+0x16/0x16 [ 60.987220] [<0000000023a2f5d0>] ? shmem_xattr_handler_get+0x3e/0x50 [ 60.988452] [<000000006a9d6c32>] ? __warn.cold+0x14/0x2f [ 60.989247] [<00000000d721277f>] ? notify_change2+0xae2/0xd90 [ 60.990133] [<00000000530fb5f5>] __warn.cold+0x2f/0x2f [ 60.990897] [<0000000036438f63>] warn_slowpath_null+0x2d/0x40 [ 60.991785] [<00000000d721277f>] notify_change2+0xae2/0xd90 [ 60.992609] [<0000000091dfa7ec>] file_remove_privs+0x285/0x4b0 [ 60.993459] [<0000000042c27e9f>] ? dentry_needs_remove_privs.part.0+0x60/0x60 [ 60.994693] [<00000000d9102ad7>] ? depot_save_stack+0x13c/0x4a0 [ 60.997134] [<000000008aa744af>] ? kasan_kmalloc.part.0+0xc6/0xf0 [ 61.004111] [<000000006f45f10c>] ? save_stack_trace+0x16/0x20 [ 61.010066] [<0000000027d2cb15>] ? kasan_kmalloc.part.0+0x62/0xf0 [ 61.016373] [<0000000042c6f4e9>] ? kasan_kmalloc+0xb7/0xd0 [ 61.022263] [<0000000072c3551d>] __generic_file_write_iter+0x157/0x530 [ 61.029016] [<000000001007864d>] ? entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 61.036219] [<00000000aad6f971>] blkdev_write_iter+0x1bb/0x370 [ 61.042421] [<000000004f9a5f21>] ? bd_acquire+0x250/0x250 [ 61.048141] [<00000000a29f567c>] vfs_iter_write+0x2e2/0x580 [ 61.053951] [<00000000c6cbcb57>] ? do_iter_readv_writev+0x4b0/0x4b0 [ 61.060546] [<00000000721f2688>] ? kasan_unpoison_shadow+0x35/0x50 [ 61.067003] [<00000000e941791a>] ? splice_from_pipe_next.part.0+0x1e9/0x290 [ 61.074559] [<00000000e8e1a929>] ? __kmalloc+0x133/0x320 [ 61.080250] [<000000000ac21453>] iter_file_splice_write+0x5a9/0xb10 [ 61.087031] [<00000000f2c74681>] ? __atime_needs_update+0x950/0x950 [ 61.093605] [<00000000b4d48f97>] ? vmsplice_to_user+0x1e0/0x1e0 [ 61.099744] [<000000008199e341>] ? avc_policy_seqno+0x9/0x20 [ 61.105978] [<00000000ced53164>] ? selinux_file_permission+0x85/0x470 [ 61.112652] [<000000001f1709a0>] ? security_file_permission+0x8f/0x1f0 [ 61.119541] [<00000000344f6227>] ? rw_verify_area+0xea/0x2b0 [ 61.125676] [<00000000b4d48f97>] ? vmsplice_to_user+0x1e0/0x1e0 [ 61.132200] [<00000000e5bb2079>] direct_splice_actor+0x126/0x1a0 [ 61.138580] [<000000004ae92d54>] splice_direct_to_actor+0x2c8/0x820 [ 61.152188] [<0000000008712a45>] ? generic_pipe_buf_nosteal+0x10/0x10 [ 61.158964] [<00000000628108ae>] ? do_splice_to+0x170/0x170 [ 61.164859] [<000000001f1709a0>] ? security_file_permission+0x8f/0x1f0 [ 61.171618] [<00000000344f6227>] ? rw_verify_area+0xea/0x2b0 [ 61.177976] [<00000000dd67942c>] do_splice_direct+0x1a5/0x260 [ 61.184080] [<0000000015c80022>] ? splice_direct_to_actor+0x820/0x820 [ 61.190742] [<00000000ced53164>] ? selinux_file_permission+0x85/0x470 [ 61.197567] [<000000001f1709a0>] ? security_file_permission+0x8f/0x1f0 [ 61.204327] [<00000000344f6227>] ? rw_verify_area+0xea/0x2b0 [ 61.210301] [<00000000953bac30>] do_sendfile+0x503/0xc00 [ 61.219420] [<00000000fc73fb06>] ? do_compat_pwritev64+0x180/0x180 [ 61.226187] [<000000000c1fc71c>] ? vfs_writev+0x91/0xc0 [ 61.231870] [<00000000f0ece28a>] ? do_pwritev+0x142/0x240 [ 61.237505] [<00000000ea0a274f>] SyS_sendfile64+0x145/0x160 [ 61.249576] [<00000000ae89591e>] ? SyS_sendfile+0x160/0x160 [ 61.257307] [<0000000003091d9a>] ? do_syscall_64+0x4a/0x570 [ 61.263216] [<00000000ae89591e>] ? SyS_sendfile+0x160/0x160 [ 61.269143] [<00000000f77accac>] do_syscall_64+0x1ad/0x570 [ 61.274850] [<000000001007864d>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 61.282644] Kernel Offset: disabled [ 61.286299] Rebooting in 86400 seconds..