[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.15.201' (ECDSA) to the list of known hosts. syzkaller login: [ 35.545713] IPVS: ftp: loaded support on port[0] = 21 executing program [ 35.599786] IPVS: ftp: loaded support on port[0] = 21 executing program [ 35.694148] IPVS: ftp: loaded support on port[0] = 21 [ 35.742209] EXT4-fs (sda1): Unrecognized mount option "fscontext=user_u" or missing value [ 35.776416] EXT4-fs (sda1): Unrecognized mount option "fscontext=user_u" or missing value [ 35.785156] IPVS: ftp: loaded support on port[0] = 21 executing program executing program [ 35.797214] EXT4-fs error (device sda1): ext4_xattr_set_entry:1606: inode #15720: comm syz-executor268: corrupted xattr entries [ 35.815526] EXT4-fs (sda1): Unrecognized mount option "fscontext=user_u" or missing value executing program [ 35.842854] EXT4-fs (sda1): Unrecognized mount option "fscontext=user_u" or missing value [ 35.863300] EXT4-fs error (device sda1): ext4_xattr_set_entry:1606: inode #15734: comm syz-executor268: corrupted xattr entries executing program [ 35.897861] EXT4-fs (sda1): Unrecognized mount option "fscontext=user_u" or missing value [ 35.925376] EXT4-fs (sda1): Unrecognized mount option "fscontext=user_u" or missing value executing program executing program [ 35.925591] EXT4-fs error (device sda1): ext4_xattr_set_entry:1606: inode #15739: comm syz-executor268: corrupted xattr entries [ 35.965343] IPVS: ftp: loaded support on port[0] = 21 [ 35.973736] EXT4-fs error (device sda1): ext4_xattr_set_entry:1606: inode #15732: comm syz-executor268: corrupted xattr entries [ 35.976552] EXT4-fs (sda1): Unrecognized mount option "fscontext=user_u" or missing value executing program executing program executing program [ 36.014156] EXT4-fs (sda1): Unrecognized mount option "fscontext=user_u" or missing value [ 36.044447] EXT4-fs error (device sda1): ext4_xattr_set_entry:1606: inode #15734: comm syz-executor268: corrupted xattr entries executing program executing program [ 36.054252] EXT4-fs (sda1): Unrecognized mount option "fscontext=user_u" or missing value [ 36.082371] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program [ 36.105311] EXT4-fs (sda1): Unrecognized mount option "fscontext=user_u" or missing value [ 36.126316] EXT4-fs error (device sda1): ext4_xattr_set_entry:1606: inode #15738: comm syz-executor268: corrupted xattr entries executing program executing program [ 36.160111] EXT4-fs error (device sda1): ext4_xattr_set_entry:1606: inode #15748: comm syz-executor268: corrupted xattr entries [ 36.187732] EXT4-fs error (device sda1): ext4_xattr_set_entry:1606: inode #15730: comm syz-executor268: corrupted xattr entries executing program executing program executing program executing program executing program [ 36.202215] EXT4-fs error (device sda1): ext4_xattr_set_entry:1606: inode #15738: comm syz-executor268: corrupted xattr entries [ 36.217533] EXT4-fs error (device sda1): ext4_xattr_set_entry:1606: inode #15755: comm syz-executor268: corrupted xattr entries executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.876844] ================================================================== [ 38.887630] BUG: KASAN: use-after-free in ext4_xattr_set_entry+0x30cb/0x30f0 [ 38.897786] Read of size 4 at addr ffff88808ba45004 by task syz-executor268/8668 [ 38.906095] [ 38.908449] CPU: 0 PID: 8668 Comm: syz-executor268 Not tainted 4.14.202-syzkaller #0 [ 38.922089] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.932428] Call Trace: [ 38.935925] dump_stack+0x1b2/0x283 [ 38.941530] print_address_description.cold+0x54/0x1d3 [ 38.947539] kasan_report_error.cold+0x8a/0x194 [ 38.954241] ? ext4_xattr_set_entry+0x30cb/0x30f0 [ 38.962933] __asan_report_load4_noabort+0x68/0x70 [ 38.969178] ? ext4_xattr_set_entry+0x30cb/0x30f0 [ 38.974052] ext4_xattr_set_entry+0x30cb/0x30f0 [ 38.979424] ? mark_page_accessed+0x20c/0x530 [ 38.984178] ? ext4_xattr_inode_get+0x5d0/0x5d0 [ 38.989591] ? __getblk_gfp+0x48/0x70 [ 38.993602] ext4_xattr_ibody_set+0x73/0x280 [ 38.998656] ext4_xattr_set_handle+0x4d0/0xd20 [ 39.003840] ? ext4_xattr_ibody_inline_set+0x280/0x280 [ 39.010048] ? is_bpf_text_address+0x91/0x150 [ 39.014695] ? __dquot_initialize+0x228/0xa70 [ 39.019708] ? lock_acquire+0x170/0x3f0 [ 39.023741] ? __ext4_journal_start_sb+0x105/0x3b0 [ 39.029490] ? ext4_xattr_set+0x19b/0x230 [ 39.034129] ext4_xattr_set+0x118/0x230 [ 39.038481] ? ext4_xattr_set_credits+0x1f0/0x1f0 [ 39.044491] ? kmem_cache_free+0x7c/0x2b0 [ 39.050958] ? xattr_resolve_name+0x22c/0x370 [ 39.056250] ? ext4_xattr_inode_update_ref.cold+0x119/0x119 [ 39.063184] __vfs_setxattr+0xdc/0x130 [ 39.068185] ? xattr_resolve_name+0x370/0x370 [ 39.072792] ? evm_protect_xattr.constprop.0+0x6c/0x350 [ 39.078534] __vfs_setxattr_noperm+0xfd/0x3d0 [ 39.083986] __vfs_setxattr_locked+0x14d/0x250 [ 39.091133] vfs_setxattr+0xcf/0x230 [ 39.094970] ? __check_object_size+0x119/0x22c [ 39.099810] ? __vfs_setxattr_locked+0x250/0x250 [ 39.104675] ? strncpy_from_user+0x210/0x2c0 [ 39.109565] setxattr+0x1a9/0x300 [ 39.113564] ? vfs_setxattr+0x230/0x230 [ 39.118143] ? filename_lookup+0x380/0x510 [ 39.126206] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 39.132894] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 39.138839] ? preempt_count_add+0xaf/0x170 [ 39.143177] ? __mnt_want_write+0x1da/0x270 [ 39.149886] path_setxattr+0x118/0x130 [ 39.154677] ? setxattr+0x300/0x300 [ 39.159284] SyS_setxattr+0x36/0x50 [ 39.163263] ? vfs_getxattr_alloc+0x2d0/0x2d0 [ 39.168268] do_syscall_64+0x1d5/0x640 [ 39.175491] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 39.183992] RIP: 0033:0x445ba9 [ 39.189500] RSP: 002b:00007ffeb05e9d18 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc [ 39.200899] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000445ba9 [ 39.208588] RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000100 [ 39.216977] RBP: 0000000001a18c30 R08: 0000000000000001 R09: 0000006e0000005b [ 39.227053] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffeb05e9d90 [ 39.237300] R13: 0000000000000044 R14: 0000000000000000 R15: 0000000000000000 [ 39.247367] [ 39.249087] The buggy address belongs to the page: [ 39.254232] page:ffffea00022e9140 count:0 mapcount:0 mapping: (null) index:0x1 [ 39.263374] flags: 0xfff00000000000() [ 39.267177] raw: 00fff00000000000 0000000000000000 0000000000000001 00000000ffffffff [ 39.275518] raw: ffffea00022ed960 ffffea00022ea8e0 0000000000000000 0000000000000000 [ 39.284117] page dumped because: kasan: bad access detected [ 39.291800] [ 39.294440] Memory state around the buggy address: [ 39.301698] ffff88808ba44f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.313590] ffff88808ba44f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.321295] >ffff88808ba45000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 39.329341] ^ [ 39.333050] ffff88808ba45080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 39.342135] ffff88808ba45100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 39.351078] ================================================================== [ 39.359246] Disabling lock debugging due to kernel taint [ 39.366098] Kernel panic - not syncing: panic_on_warn set ... [ 39.366098] [ 39.374595] CPU: 0 PID: 8668 Comm: syz-executor268 Tainted: G B 4.14.202-syzkaller #0 [ 39.385237] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.398473] Call Trace: [ 39.401241] dump_stack+0x1b2/0x283 [ 39.405874] panic+0x1f9/0x42d [ 39.409507] ? add_taint.cold+0x16/0x16 [ 39.413757] ? ___preempt_schedule+0x16/0x18 [ 39.418823] kasan_end_report+0x43/0x49 [ 39.423045] kasan_report_error.cold+0xa7/0x194 [ 39.428091] ? ext4_xattr_set_entry+0x30cb/0x30f0 [ 39.434094] __asan_report_load4_noabort+0x68/0x70 [ 39.440759] ? ext4_xattr_set_entry+0x30cb/0x30f0 [ 39.447462] ext4_xattr_set_entry+0x30cb/0x30f0 [ 39.453160] ? mark_page_accessed+0x20c/0x530 [ 39.459201] ? ext4_xattr_inode_get+0x5d0/0x5d0 [ 39.464138] ? __getblk_gfp+0x48/0x70 [ 39.468822] ext4_xattr_ibody_set+0x73/0x280 [ 39.475066] ext4_xattr_set_handle+0x4d0/0xd20 [ 39.483437] ? ext4_xattr_ibody_inline_set+0x280/0x280 [ 39.491766] ? is_bpf_text_address+0x91/0x150 [ 39.497412] ? __dquot_initialize+0x228/0xa70 [ 39.504921] ? lock_acquire+0x170/0x3f0 [ 39.509240] ? __ext4_journal_start_sb+0x105/0x3b0 [ 39.514686] ? ext4_xattr_set+0x19b/0x230 [ 39.518899] ext4_xattr_set+0x118/0x230 [ 39.522879] ? ext4_xattr_set_credits+0x1f0/0x1f0 [ 39.529230] ? kmem_cache_free+0x7c/0x2b0 [ 39.533691] ? xattr_resolve_name+0x22c/0x370 [ 39.539542] ? ext4_xattr_inode_update_ref.cold+0x119/0x119 [ 39.548214] __vfs_setxattr+0xdc/0x130 [ 39.552317] ? xattr_resolve_name+0x370/0x370 [ 39.557026] ? evm_protect_xattr.constprop.0+0x6c/0x350 [ 39.562939] __vfs_setxattr_noperm+0xfd/0x3d0 [ 39.568007] __vfs_setxattr_locked+0x14d/0x250 [ 39.572678] vfs_setxattr+0xcf/0x230 [ 39.576875] ? __check_object_size+0x119/0x22c [ 39.581845] ? __vfs_setxattr_locked+0x250/0x250 [ 39.587210] ? strncpy_from_user+0x210/0x2c0 [ 39.592185] setxattr+0x1a9/0x300 [ 39.595825] ? vfs_setxattr+0x230/0x230 [ 39.600576] ? filename_lookup+0x380/0x510 [ 39.606604] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 39.614431] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 39.620043] ? preempt_count_add+0xaf/0x170 [ 39.625974] ? __mnt_want_write+0x1da/0x270 [ 39.631692] path_setxattr+0x118/0x130 [ 39.636028] ? setxattr+0x300/0x300 [ 39.639820] SyS_setxattr+0x36/0x50 [ 39.644369] ? vfs_getxattr_alloc+0x2d0/0x2d0 [ 39.650435] do_syscall_64+0x1d5/0x640 [ 39.657707] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 39.665045] RIP: 0033:0x445ba9 [ 39.668950] RSP: 002b:00007ffeb05e9d18 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc [ 39.677915] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000445ba9 [ 39.686756] RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000100 [ 39.696594] RBP: 0000000001a18c30 R08: 0000000000000001 R09: 0000006e0000005b [ 39.706458] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffeb05e9d90 [ 39.715864] R13: 0000000000000044 R14: 0000000000000000 R15: 0000000000000000 [ 39.725001] Kernel Offset: disabled [ 39.729088] Rebooting in 86400 seconds..