[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.43' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.647832] audit: type=1400 audit(1601535228.342:8): avc: denied { execmem } for pid=6357 comm="syz-executor591" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 33.686480] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 33.696761] ------------[ cut here ]------------ [ 33.701698] WARNING: CPU: 1 PID: 6357 at fs/ext4/xattr.c:1660 ext4_xattr_set_entry+0x24c1/0x30f0 [ 33.710752] Kernel panic - not syncing: panic_on_warn set ... [ 33.710752] [ 33.718117] CPU: 1 PID: 6357 Comm: syz-executor591 Not tainted 4.14.198-syzkaller #0 [ 33.725992] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.735371] Call Trace: [ 33.737963] dump_stack+0x1b2/0x283 [ 33.741593] panic+0x1f9/0x42d [ 33.744796] ? add_taint.cold+0x16/0x16 [ 33.748749] ? ext4_xattr_set_entry+0x24c1/0x30f0 [ 33.753586] ? ext4_xattr_set_entry+0x24c1/0x30f0 [ 33.758937] __warn.cold+0x20/0x4b [ 33.762462] ? ist_end_non_atomic+0x10/0x10 [ 33.766776] ? ext4_xattr_set_entry+0x24c1/0x30f0 [ 33.771609] report_bug+0x208/0x249 [ 33.775220] do_error_trap+0x195/0x2d0 [ 33.779175] ? math_error+0x2d0/0x2d0 [ 33.782967] ? unwind_get_return_address+0x51/0x90 [ 33.787878] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 33.793222] ? __save_stack_trace+0xa0/0x160 [ 33.797615] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.802441] invalid_op+0x1b/0x40 [ 33.805874] RIP: 0010:ext4_xattr_set_entry+0x24c1/0x30f0 [ 33.811316] RSP: 0018:ffff8880895574b0 EFLAGS: 00010297 [ 33.816662] RAX: ffff8880a5492180 RBX: ffff88808f8ef6e0 RCX: 0000000000000005 [ 33.823907] RDX: 0000000000000000 RSI: ffff8880895577a8 RDI: ffff8880a35e2460 [ 33.831151] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003 [ 33.838407] R10: 0000000000000000 R11: ffff8880a5492180 R12: 00000000000003dc [ 33.846194] R13: ffffffff86b354c0 R14: 0000000000000000 R15: ffff8880895577a8 [ 33.853476] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 33.858571] ? debug_check_no_obj_freed+0x2c0/0x674 [ 33.863580] ? ext4_xattr_inode_get+0x5d0/0x5d0 [ 33.868229] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 33.874093] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.879100] ? __kmalloc+0x3a4/0x400 [ 33.882790] ? ext4_xattr_block_set+0x1209/0x2af0 [ 33.887608] ext4_xattr_block_set+0x1334/0x2af0 [ 33.892694] ? ext4_xattr_ibody_set+0x280/0x280 [ 33.897347] ? __getblk_gfp+0x48/0x70 [ 33.901233] ? ext4_xattr_ibody_find+0x223/0x5c0 [ 33.905985] ? ext4_xattr_block_find+0x52/0x5a0 [ 33.910682] ? ext4_xattr_ibody_set+0x1bb/0x280 [ 33.915372] ext4_xattr_set_handle+0x839/0xd20 [ 33.919952] ? ext4_xattr_ibody_inline_set+0x280/0x280 [ 33.925209] ? avc_has_perm+0x1a4/0x330 [ 33.929162] ? __dquot_initialize+0x228/0xa70 [ 33.933633] ? avc_has_perm_noaudit+0x2a0/0x2a0 [ 33.938285] ? __ext4_journal_start_sb+0x105/0x3b0 [ 33.943204] ? ext4_xattr_set+0x19b/0x230 [ 33.947341] ext4_xattr_set+0x118/0x230 [ 33.951297] ? ext4_xattr_set_credits+0x1f0/0x1f0 [ 33.956129] ? xattr_resolve_name+0x22c/0x370 [ 33.960601] ? ext4_xattr_inode_update_ref.cold+0x119/0x119 [ 33.966301] __vfs_setxattr+0xdc/0x130 [ 33.970169] ? xattr_resolve_name+0x370/0x370 [ 33.974655] ? evm_protect_xattr.constprop.0+0x6c/0x350 [ 33.980002] __vfs_setxattr_noperm+0xfd/0x3d0 [ 33.984493] __vfs_setxattr_locked+0x14d/0x250 [ 33.989074] vfs_setxattr+0xcf/0x230 [ 33.992873] ? __check_object_size+0x119/0x22c [ 33.997457] ? __vfs_setxattr_locked+0x250/0x250 [ 34.002208] ? strncpy_from_user+0x210/0x2c0 [ 34.006610] setxattr+0x1a9/0x300 [ 34.010040] ? vfs_setxattr+0x230/0x230 [ 34.014006] ? filename_lookup+0x380/0x510 [ 34.018236] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 34.023675] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 34.029515] ? preempt_count_add+0xaf/0x170 [ 34.033826] ? __mnt_want_write+0x1da/0x270 [ 34.038155] path_setxattr+0x118/0x130 [ 34.042457] ? setxattr+0x300/0x300 [ 34.046062] SyS_lsetxattr+0x33/0x40 [ 34.049750] ? SyS_setxattr+0x50/0x50 [ 34.053530] do_syscall_64+0x1d5/0x640 [ 34.057396] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 34.062561] RIP: 0033:0x4445a9 [ 34.065741] RSP: 002b:00007ffcd2725f78 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd [ 34.073425] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00000000004445a9 [ 34.080773] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000020000140 [ 34.088030] RBP: 00000000006cf018 R08: 0000000000000000 R09: 0000000000000000 [ 34.095283] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402190 [ 34.102527] R13: 0000000000402220 R14: 0000000000000000 R15: 0000000000000000 [ 34.110952] Kernel Offset: disabled [ 34.114625] Rebooting in 86400 seconds..