[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.192' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.986305] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 34.999009] EXT4-fs error (device loop0): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 16384 vs 96 free clusters [ 35.014691] WARNING: CPU: 0 PID: 8117 at fs/ext4/xattr.c:1661 ext4_xattr_set_entry+0x2910/0x3690 [ 35.023726] Kernel panic - not syncing: panic_on_warn set ... [ 35.023726] [ 35.031109] CPU: 0 PID: 8117 Comm: syz-executor923 Not tainted 4.19.171-syzkaller #0 [ 35.039010] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.048348] Call Trace: [ 35.050922] dump_stack+0x1fc/0x2ef [ 35.054559] panic+0x26a/0x50e [ 35.057925] ? __warn_printk+0xf3/0xf3 [ 35.061797] ? ext4_xattr_set_entry+0x2910/0x3690 [ 35.066649] ? __probe_kernel_read+0x130/0x1b0 [ 35.071229] ? __warn.cold+0x5/0x5a [ 35.074861] ? __warn+0xe4/0x200 [ 35.078212] ? ext4_xattr_set_entry+0x2910/0x3690 [ 35.083042] __warn.cold+0x20/0x5a [ 35.086583] ? ext4_xattr_set_entry+0x2910/0x3690 [ 35.091429] report_bug+0x262/0x2b0 [ 35.095050] do_error_trap+0x1d7/0x310 [ 35.098921] ? math_error+0x310/0x310 [ 35.102707] ? is_bpf_text_address+0xfc/0x1b0 [ 35.107202] ? kernel_text_address+0xbd/0xf0 [ 35.111593] ? __kernel_text_address+0x9/0x30 [ 35.116072] ? error_entry+0x72/0xd0 [ 35.119785] ? trace_hardirqs_off_caller+0x6e/0x210 [ 35.124787] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.129616] invalid_op+0x14/0x20 [ 35.133071] RIP: 0010:ext4_xattr_set_entry+0x2910/0x3690 [ 35.138503] Code: e8 05 d2 73 ff 48 8b 7c 24 20 e8 3b ef cf ff 4c 8b b4 24 20 01 00 00 48 c7 44 24 18 00 00 00 00 e9 b2 db ff ff e8 e0 d1 73 ff <0f> 0b e9 fb e7 ff ff e8 d4 d1 73 ff 48 8b 7c 24 18 e8 fa a1 f0 ff [ 35.157419] RSP: 0018:ffff888091a2f3a8 EFLAGS: 00010293 [ 35.162805] RAX: ffff8880956aa300 RBX: ffff888092098560 RCX: ffffffff81ee7069 [ 35.170057] RDX: 0000000000000000 RSI: ffffffff81ee8870 RDI: 0000000000000007 [ 35.177309] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 35.184576] R10: 0000000000000007 R11: 0000000016ee1318 R12: 00000000000007dc [ 35.191841] R13: 0000000000000000 R14: 00000000ffffffc3 R15: 0000000000000001 [ 35.199119] ? ext4_xattr_set_entry+0x1109/0x3690 [ 35.203944] ? ext4_xattr_set_entry+0x2910/0x3690 [ 35.208772] ? ext4_xattr_set_entry+0x2910/0x3690 [ 35.213609] ? lock_downgrade+0x720/0x720 [ 35.217743] ? debug_check_no_obj_freed+0xb5/0x490 [ 35.222658] ? ext4_xattr_inode_get+0x680/0x680 [ 35.227310] ? check_preemption_disabled+0x41/0x280 [ 35.232314] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 35.237328] ? __kmalloc+0x38e/0x3c0 [ 35.241022] ? ext4_xattr_block_set+0xe19/0x2eb0 [ 35.245787] ext4_xattr_block_set+0xf44/0x2eb0 [ 35.250359] ? ext4_xattr_ibody_set+0x2a0/0x2a0 [ 35.255028] ? __getblk_gfp+0x48/0x70 [ 35.258840] ? ext4_xattr_ibody_find+0x253/0x540 [ 35.263578] ? ext4_xattr_block_find+0x5c/0x6c0 [ 35.268231] ext4_xattr_set_handle+0x9c1/0xfa0 [ 35.272800] ? ext4_xattr_ibody_inline_set+0x2a0/0x2a0 [ 35.278064] ? __save_stack_trace+0x72/0x190 [ 35.282483] ? ext4_journal_check_start+0x185/0x220 [ 35.287495] ? ext4_get_nojournal+0x53/0xb0 [ 35.291816] ? __ext4_journal_start_sb+0x12d/0x3f0 [ 35.296730] ext4_xattr_set+0x135/0x2a0 [ 35.300731] ? ext4_xattr_set_credits+0x200/0x200 [ 35.305555] ? check_preemption_disabled+0x41/0x280 [ 35.310555] ? mark_held_locks+0xf0/0xf0 [ 35.314614] ? xattr_resolve_name+0x26e/0x3d0 [ 35.319094] ? ext4_xattr_destroy_cache+0x30/0x30 [ 35.323918] __vfs_setxattr+0x10e/0x170 [ 35.327879] ? xattr_resolve_name+0x3d0/0x3d0 [ 35.332377] ? evm_protect_xattr.constprop.0+0x99/0x3d0 [ 35.337724] __vfs_setxattr_noperm+0x11a/0x420 [ 35.342309] __vfs_setxattr_locked+0x176/0x250 [ 35.346874] vfs_setxattr+0xe5/0x270 [ 35.350570] ? __vfs_setxattr_locked+0x250/0x250 [ 35.355330] ? strncpy_from_user+0x2a2/0x350 [ 35.359721] setxattr+0x23d/0x330 [ 35.363172] ? vfs_setxattr+0x270/0x270 [ 35.367148] ? filename_lookup+0x3d5/0x5a0 [ 35.371383] ? __phys_addr_symbol+0x2c/0x70 [ 35.375690] ? __check_object_size+0x17b/0x3e0 [ 35.380256] ? check_preemption_disabled+0x41/0x280 [ 35.385262] ? preempt_count_add+0xaf/0x190 [ 35.389584] ? __mnt_want_write+0x22c/0x2c0 [ 35.393906] path_setxattr+0x170/0x190 [ 35.397777] ? __se_sys_fsetxattr+0x1b0/0x1b0 [ 35.402258] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 35.407618] __x64_sys_setxattr+0xc0/0x160 [ 35.411850] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 35.416429] do_syscall_64+0xf9/0x620 [ 35.420228] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.425403] RIP: 0033:0x444709 [ 35.428576] Code: 8d d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 5b d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 35.447473] RSP: 002b:00007ffe28253fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc [ 35.455597] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000444709 [ 35.462866] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000020000040 [ 35.470131] RBP: 00000000006cf018 R08: 0000000000000000 R09: 0000000000000000 [ 35.477385] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004022f0 [ 35.484653] R13: 0000000000402380 R14: 0000000000000000 R15: 0000000000000000 [ 35.492492] Kernel Offset: disabled [ 35.496172] Rebooting in 86400 seconds..