[ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.192' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 64.307194][ T8500] BUG: unable to handle page fault for address: ffffffffffffff80 [ 64.314952][ T8500] #PF: supervisor read access in kernel mode [ 64.320927][ T8500] #PF: error_code(0x0000) - not-present page [ 64.326895][ T8500] PGD b08f067 P4D b08f067 PUD b091067 PMD 0 [ 64.332894][ T8500] Oops: 0000 [#1] PREEMPT SMP KASAN [ 64.338090][ T8500] CPU: 1 PID: 8500 Comm: syz-executor862 Not tainted 5.10.0-rc3-next-20201116-syzkaller #0 [ 64.348156][ T8500] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.358194][ T8500] RIP: 0010:diFree+0x13d/0x2dc0 [ 64.363020][ T8500] Code: 28 48 8d 78 80 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ef 23 00 00 48 8b 44 24 18 <4c> 8b 60 80 48 8b 44 24 20 49 8d 6c 24 04 48 c1 e8 0c 48 89 ea 48 [ 64.382612][ T8500] RSP: 0018:ffffc90000fff960 EFLAGS: 00010246 [ 64.388656][ T8500] RAX: 0000000000000000 RBX: ffff88802049ce00 RCX: ffffffff82aa4f67 [ 64.396605][ T8500] RDX: 1ffffffffffffff0 RSI: ffffffff82ac7f52 RDI: ffffffffffffff80 [ 64.404569][ T8500] RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88802ffc890f [ 64.412515][ T8500] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88802ffc8db8 [ 64.420462][ T8500] R13: ffff88802ffc8d08 R14: ffffffff8982e3c0 R15: ffff88802ffc8ce0 [ 64.428409][ T8500] FS: 0000000000cd7880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 64.437312][ T8500] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.443872][ T8500] CR2: ffffffffffffff80 CR3: 0000000013b2d000 CR4: 00000000001506e0 [ 64.451820][ T8500] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.459766][ T8500] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.467710][ T8500] Call Trace: [ 64.470980][ T8500] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 64.476937][ T8500] ? __dquot_initialize+0x298/0xc20 [ 64.482111][ T8500] ? find_held_lock+0x2d/0x110 [ 64.486869][ T8500] ? dquot_initialize_needed+0x290/0x290 [ 64.492494][ T8500] ? diWrite+0x1430/0x1430 [ 64.496885][ T8500] ? lock_downgrade+0x6d0/0x6d0 [ 64.501709][ T8500] ? var_wake_function+0x130/0x130 [ 64.506793][ T8500] ? rwlock_bug.part.0+0x90/0x90 [ 64.511704][ T8500] jfs_evict_inode+0x2c9/0x370 [ 64.516527][ T8500] ? jfs_write_inode+0x1e0/0x1e0 [ 64.521439][ T8500] evict+0x2ed/0x750 [ 64.525325][ T8500] iput.part.0+0x3fe/0x820 [ 64.529718][ T8500] iput+0x58/0x70 [ 64.533394][ T8500] diFreeSpecial+0x6f/0x90 [ 64.537784][ T8500] jfs_mount+0x23f/0x3d0 [ 64.542023][ T8500] jfs_fill_super+0x5b1/0xbc0 [ 64.546673][ T8500] ? init_once+0x130/0x130 [ 64.551072][ T8500] ? set_blocksize+0x1c1/0x400 [ 64.555828][ T8500] mount_bdev+0x32e/0x3f0 [ 64.560131][ T8500] ? init_once+0x130/0x130 [ 64.564522][ T8500] ? jfs_get_dquots+0x10/0x10 [ 64.569177][ T8500] legacy_get_tree+0x105/0x220 [ 64.574005][ T8500] vfs_get_tree+0x89/0x2f0 [ 64.578413][ T8500] path_mount+0x12ae/0x1e70 [ 64.582892][ T8500] ? strncpy_from_user+0x29e/0x3a0 [ 64.587976][ T8500] ? finish_automount+0xac0/0xac0 [ 64.592977][ T8500] ? getname_flags.part.0+0x1dd/0x4f0 [ 64.598342][ T8500] __x64_sys_mount+0x27f/0x300 [ 64.603101][ T8500] ? copy_mnt_ns+0xae0/0xae0 [ 64.607665][ T8500] ? syscall_enter_from_user_mode+0x1d/0x50 [ 64.613548][ T8500] do_syscall_64+0x2d/0x70 [ 64.617939][ T8500] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.623804][ T8500] RIP: 0033:0x446d5a [ 64.627677][ T8500] 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 [ 64.647256][ T8500] RSP: 002b:00007ffe73344728 EFLAGS: 00000283 ORIG_RAX: 00000000000000a5 [ 64.655652][ T8500] RAX: ffffffffffffffda RBX: 00007ffe73344780 RCX: 0000000000446d5a [ 64.663613][ T8500] RDX: 0000000020000040 RSI: 00000000200000c0 RDI: 00007ffe73344740 [ 64.671566][ T8500] RBP: 00007ffe73344740 R08: 00007ffe73344780 R09: 00007ffe00000015 [ 64.679514][ T8500] R10: 0000000000000000 R11: 0000000000000283 R12: 0000000000000002 [ 64.687475][ T8500] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 64.695420][ T8500] Modules linked in: [ 64.699290][ T8500] CR2: ffffffffffffff80 [ 64.703446][ T8500] ---[ end trace 041536008788e822 ]--- [ 64.708895][ T8500] RIP: 0010:diFree+0x13d/0x2dc0 [ 64.713731][ T8500] Code: 28 48 8d 78 80 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ef 23 00 00 48 8b 44 24 18 <4c> 8b 60 80 48 8b 44 24 20 49 8d 6c 24 04 48 c1 e8 0c 48 89 ea 48 [ 64.733404][ T8500] RSP: 0018:ffffc90000fff960 EFLAGS: 00010246 [ 64.739532][ T8500] RAX: 0000000000000000 RBX: ffff88802049ce00 RCX: ffffffff82aa4f67 [ 64.747492][ T8500] RDX: 1ffffffffffffff0 RSI: ffffffff82ac7f52 RDI: ffffffffffffff80 [ 64.755439][ T8500] RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88802ffc890f [ 64.763386][ T8500] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88802ffc8db8 [ 64.771459][ T8500] R13: ffff88802ffc8d08 R14: ffffffff8982e3c0 R15: ffff88802ffc8ce0 [ 64.779437][ T8500] FS: 0000000000cd7880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 64.788356][ T8500] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.794921][ T8500] CR2: ffffffffffffff80 CR3: 0000000013b2d000 CR4: 00000000001506e0 [ 64.802873][ T8500] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.810837][ T8500] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.818785][ T8500] Kernel panic - not syncing: Fatal exception [ 64.825588][ T8500] Kernel Offset: disabled [ 64.830083][ T8500] Rebooting in 86400 seconds..