[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.97' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.876287][ T6867] exFAT-fs (loop0): failed to load upcase table (idx : 0x00000c00, chksum : 0x00000000, utbl_chksum : 0xe619d30d) [ 63.889365][ T6867] exFAT-fs (loop0): error, invalid access to FAT free cluster (entry 0x00000005) [ 63.898819][ T6867] exFAT-fs (loop0): Filesystem has been set read-only [ 63.906246][ T6867] exFAT-fs (loop0): failed to initialize root inode [ 63.912969][ T6867] INFO: trying to register non-static key. [ 63.918760][ T6867] the code is fine but needs lockdep annotation. [ 63.925061][ T6867] turning off the locking correctness validator. [ 63.931377][ T6867] CPU: 0 PID: 6867 Comm: syz-executor878 Not tainted 5.9.0-rc7-syzkaller #0 [ 63.940012][ T6867] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.950037][ T6867] Call Trace: [ 63.953303][ T6867] dump_stack+0x198/0x1fd [ 63.957610][ T6867] register_lock_class+0x157d/0x1630 [ 63.962866][ T6867] ? is_dynamic_key+0x1a0/0x1a0 [ 63.967703][ T6867] ? lock_is_held_type+0xbb/0xf0 [ 63.972623][ T6867] ? find_held_lock+0x2d/0x110 [ 63.977360][ T6867] ? is_dynamic_key+0x1a0/0x1a0 [ 63.982203][ T6867] __lock_acquire+0x101/0x5780 [ 63.986940][ T6867] ? __lock_acquire+0x164a/0x5780 [ 63.991946][ T6867] ? hash_ipmac4_list+0x9f4/0x1070 [ 63.997057][ T6867] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 64.003029][ T6867] lock_acquire+0x1f3/0xaf0 [ 64.007518][ T6867] ? exfat_cache_inval_inode+0x2a/0x310 [ 64.013060][ T6867] ? lock_release+0x8f0/0x8f0 [ 64.017734][ T6867] ? find_held_lock+0x2d/0x110 [ 64.022490][ T6867] ? mark_lock+0x82/0x1660 [ 64.026905][ T6867] _raw_spin_lock+0x2a/0x40 [ 64.031409][ T6867] ? exfat_cache_inval_inode+0x2a/0x310 [ 64.036950][ T6867] exfat_cache_inval_inode+0x2a/0x310 [ 64.042322][ T6867] ? lockdep_hardirqs_on+0x53/0x100 [ 64.047515][ T6867] exfat_evict_inode+0x76/0x33e [ 64.052359][ T6867] ? exfat_build_inode+0x1350/0x1350 [ 64.057639][ T6867] evict+0x2ed/0x750 [ 64.061531][ T6867] iput.part.0+0x424/0x850 [ 64.065941][ T6867] iput+0x58/0x70 [ 64.069593][ T6867] exfat_fill_super.cold+0x32/0x65a [ 64.074790][ T6867] ? exfat_init_fs_context+0x540/0x540 [ 64.080261][ T6867] ? set_blocksize+0x1c1/0x400 [ 64.085000][ T6867] get_tree_bdev+0x421/0x740 [ 64.089563][ T6867] ? exfat_init_fs_context+0x540/0x540 [ 64.094992][ T6867] vfs_get_tree+0x89/0x2f0 [ 64.099380][ T6867] path_mount+0x1387/0x20a0 [ 64.103883][ T6867] ? strncpy_from_user+0x2bf/0x3e0 [ 64.108970][ T6867] ? copy_mount_string+0x40/0x40 [ 64.113888][ T6867] ? getname_flags.part.0+0x1dd/0x4f0 [ 64.119264][ T6867] __x64_sys_mount+0x27f/0x300 [ 64.124004][ T6867] ? copy_mnt_ns+0xa60/0xa60 [ 64.128567][ T6867] ? check_preemption_disabled+0x50/0x130 [ 64.134279][ T6867] ? syscall_enter_from_user_mode+0x1d/0x60 [ 64.140144][ T6867] do_syscall_64+0x2d/0x70 [ 64.144535][ T6867] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.150397][ T6867] RIP: 0033:0x44726a [ 64.154265][ T6867] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 64.173847][ T6867] RSP: 002b:00007fffa372a428 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 64.182257][ T6867] RAX: ffffffffffffffda RBX: 00007fffa372a480 RCX: 000000000044726a [ 64.190210][ T6867] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fffa372a440 [ 64.198172][ T6867] RBP: 00007fffa372a440 R08: 00007fffa372a480 R09: 00007fff00000015 [ 64.206132][ T6867] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000017 [ 64.214083][ T6867] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 64.222181][ T6867] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN [ 64.233910][ T6867] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 64.242304][ T6867] CPU: 0 PID: 6867 Comm: syz-executor878 Not tainted 5.9.0-rc7-syzkaller #0 [ 64.250942][ T6867] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.260987][ T6867] RIP: 0010:__list_del_entry_valid+0x1d/0xef [ 64.266939][ T6867] Code: 48 8b 34 24 eb b4 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 55 41 54 55 48 89 fd 48 83 c7 08 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a0 00 00 00 48 89 ea 4c 8b 65 08 48 b8 00 00 00 [ 64.286535][ T6867] RSP: 0018:ffffc90005497a98 EFLAGS: 00010202 [ 64.292587][ T6867] RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffffff815cf800 [ 64.300531][ T6867] RDX: 0000000000000001 RSI: ffffffff82246855 RDI: 0000000000000008 [ 64.308491][ T6867] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003 [ 64.316444][ T6867] R10: fffff52000a92f49 R11: 0000000036383654 R12: ffffed1010b11adb [ 64.324390][ T6867] R13: ffff88808588d7d8 R14: 0000000000000008 R15: 0000000000000000 [ 64.332341][ T6867] FS: 0000000002043880(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 [ 64.341276][ T6867] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.347833][ T6867] CR2: 00007fffa372b000 CR3: 00000000971a2000 CR4: 00000000001506f0 [ 64.355803][ T6867] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.363747][ T6867] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.371703][ T6867] Call Trace: [ 64.374985][ T6867] exfat_cache_inval_inode+0xb3/0x310 [ 64.380338][ T6867] exfat_evict_inode+0x76/0x33e [ 64.385161][ T6867] ? exfat_build_inode+0x1350/0x1350 [ 64.390416][ T6867] evict+0x2ed/0x750 [ 64.394287][ T6867] iput.part.0+0x424/0x850 [ 64.398675][ T6867] iput+0x58/0x70 [ 64.402283][ T6867] exfat_fill_super.cold+0x32/0x65a [ 64.407457][ T6867] ? exfat_init_fs_context+0x540/0x540 [ 64.412895][ T6867] ? set_blocksize+0x1c1/0x400 [ 64.417644][ T6867] get_tree_bdev+0x421/0x740 [ 64.422205][ T6867] ? exfat_init_fs_context+0x540/0x540 [ 64.427645][ T6867] vfs_get_tree+0x89/0x2f0 [ 64.432033][ T6867] path_mount+0x1387/0x20a0 [ 64.436511][ T6867] ? strncpy_from_user+0x2bf/0x3e0 [ 64.441601][ T6867] ? copy_mount_string+0x40/0x40 [ 64.446511][ T6867] ? getname_flags.part.0+0x1dd/0x4f0 [ 64.455242][ T6867] __x64_sys_mount+0x27f/0x300 [ 64.459978][ T6867] ? copy_mnt_ns+0xa60/0xa60 [ 64.464542][ T6867] ? check_preemption_disabled+0x50/0x130 [ 64.470244][ T6867] ? syscall_enter_from_user_mode+0x1d/0x60 [ 64.476111][ T6867] do_syscall_64+0x2d/0x70 [ 64.480522][ T6867] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.486395][ T6867] RIP: 0033:0x44726a [ 64.490266][ T6867] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 64.509840][ T6867] RSP: 002b:00007fffa372a428 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 64.518222][ T6867] RAX: ffffffffffffffda RBX: 00007fffa372a480 RCX: 000000000044726a [ 64.526167][ T6867] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fffa372a440 [ 64.534111][ T6867] RBP: 00007fffa372a440 R08: 00007fffa372a480 R09: 00007fff00000015 [ 64.542064][ T6867] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000017 [ 64.550022][ T6867] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 64.557968][ T6867] Modules linked in: [ 64.561931][ T6867] ---[ end trace a36d9f15549196ea ]--- [ 64.567422][ T6867] RIP: 0010:__list_del_entry_valid+0x1d/0xef [ 64.573406][ T6867] Code: 48 8b 34 24 eb b4 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 55 41 54 55 48 89 fd 48 83 c7 08 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a0 00 00 00 48 89 ea 4c 8b 65 08 48 b8 00 00 00 [ 64.593043][ T6867] RSP: 0018:ffffc90005497a98 EFLAGS: 00010202 [ 64.599135][ T6867] RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffffff815cf800 [ 64.607168][ T6867] RDX: 0000000000000001 RSI: ffffffff82246855 RDI: 0000000000000008 [ 64.615281][ T6867] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003 [ 64.623252][ T6867] R10: fffff52000a92f49 R11: 0000000036383654 R12: ffffed1010b11adb [ 64.631237][ T6867] R13: ffff88808588d7d8 R14: 0000000000000008 R15: 0000000000000000 [ 64.639249][ T6867] FS: 0000000002043880(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 [ 64.648198][ T6867] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.654813][ T6867] CR2: 00007fffa372b000 CR3: 00000000971a2000 CR4: 00000000001506f0 [ 64.663476][ T6867] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.671559][ T6867] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.679552][ T6867] Kernel panic - not syncing: Fatal exception [ 64.686639][ T6867] Kernel Offset: disabled [ 64.690952][ T6867] Rebooting in 86400 seconds..