[ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.59' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 1463.939875][ T6841] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 1463.948808][ T6841] gfs2: fsid=syz:syz: Now mounting FS... [ 1463.956650][ T6841] gfs2: fsid=syz:syz.0: fatal: invalid metadata block [ 1463.956650][ T6841] bh = 2075 (magic number) [ 1463.956650][ T6841] function = gfs2_meta_indirect_buffer, file = fs/gfs2/meta_io.c, line = 417 [ 1463.976685][ T6841] gfs2: fsid=syz:syz.0: about to withdraw this file system [ 1463.983869][ T6841] general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN [ 1463.995543][ T6841] KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077] [ 1464.003976][ T6841] CPU: 1 PID: 6841 Comm: syz-executor978 Not tainted 5.9.0-rc8-syzkaller #0 [ 1464.012656][ T6841] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1464.022886][ T6841] RIP: 0010:gfs2_withdraw+0x2b0/0xe20 [ 1464.028231][ T6841] Code: e8 03 48 89 44 24 38 42 80 3c 38 00 74 08 48 89 ef e8 74 e6 69 fe 48 89 6c 24 20 48 8b 6d 00 48 83 c5 70 48 89 e8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 ef e8 51 e6 69 fe 48 8b 45 00 48 89 44 [ 1464.047820][ T6841] RSP: 0018:ffffc900052174f0 EFLAGS: 00010202 [ 1464.053856][ T6841] RAX: 000000000000000e RBX: ffff8880a8620000 RCX: 4180eefff68da500 [ 1464.061796][ T6841] RDX: ffff8880a65b4280 RSI: 0000000000000000 RDI: ffff8880a8620430 [ 1464.069737][ T6841] RBP: 0000000000000070 R08: ffffffff834afddc R09: ffffed1015d241c3 [ 1464.077676][ T6841] R10: ffffed1015d241c3 R11: 0000000000000000 R12: 1ffff110150c404d [ 1464.085614][ T6841] R13: ffff8880a8620050 R14: ffff8880a862026c R15: dffffc0000000000 [ 1464.093555][ T6841] FS: 00000000011fa880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 1464.102450][ T6841] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1464.109006][ T6841] CR2: 00007ffd68a4a000 CR3: 00000000973a4000 CR4: 00000000001506e0 [ 1464.116960][ T6841] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1464.124938][ T6841] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1464.132876][ T6841] Call Trace: [ 1464.136144][ T6841] gfs2_meta_check_ii+0x70/0x80 [ 1464.141011][ T6841] gfs2_meta_indirect_buffer+0x29f/0x380 [ 1464.146615][ T6841] gfs2_inode_refresh+0x65/0xc00 [ 1464.151537][ T6841] inode_go_lock+0x12c/0x480 [ 1464.156097][ T6841] do_promote+0x4db/0xcd0 [ 1464.160419][ T6841] finish_xmote+0x907/0x1350 [ 1464.164976][ T6841] do_xmote+0xadb/0x14c0 [ 1464.169188][ T6841] gfs2_glock_nq+0xac3/0x14d0 [ 1464.173848][ T6841] gfs2_lookupi+0x36f/0x4f0 [ 1464.178323][ T6841] ? gfs2_lookupi+0x367/0x4f0 [ 1464.182988][ T6841] gfs2_lookup_simple+0xa4/0x100 [ 1464.187933][ T6841] init_journal+0x132/0x1970 [ 1464.192567][ T6841] ? vsnprintf+0x1a12/0x1aa0 [ 1464.197158][ T6841] ? snprintf+0x6f/0x90 [ 1464.201353][ T6841] ? _raw_spin_unlock+0x24/0x40 [ 1464.206175][ T6841] gfs2_fill_super+0x2717/0x3fe0 [ 1464.211084][ T6841] ? gfs2_glock_nq_num+0xaa/0x1d0 [ 1464.216075][ T6841] ? snprintf+0x6f/0x90 [ 1464.220282][ T6841] ? set_blocksize+0x1f5/0x3c0 [ 1464.225065][ T6841] get_tree_bdev+0x3e9/0x5f0 [ 1464.229624][ T6841] ? gfs2_reconfigure+0xe10/0xe10 [ 1464.234640][ T6841] gfs2_get_tree+0x4c/0x1f0 [ 1464.239112][ T6841] vfs_get_tree+0x88/0x270 [ 1464.243530][ T6841] path_mount+0x179d/0x29e0 [ 1464.248002][ T6841] __se_sys_mount+0x126/0x180 [ 1464.252662][ T6841] do_syscall_64+0x31/0x70 [ 1464.257051][ T6841] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1464.262914][ T6841] RIP: 0033:0x45b45a [ 1464.266778][ T6841] 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 [ 1464.286367][ T6841] RSP: 002b:00007ffd68a498d8 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 [ 1464.294754][ T6841] RAX: ffffffffffffffda RBX: 00007ffd68a49930 RCX: 000000000045b45a [ 1464.302967][ T6841] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd68a498f0 [ 1464.310930][ T6841] RBP: 00007ffd68a498f0 R08: 00007ffd68a49930 R09: 00007ffd00000015 [ 1464.318883][ T6841] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000919 [ 1464.326838][ T6841] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 1464.334782][ T6841] Modules linked in: [ 1464.338979][ T6841] ---[ end trace 640ffd2f99da41c0 ]--- [ 1464.347275][ T6841] RIP: 0010:gfs2_withdraw+0x2b0/0xe20 [ 1464.352635][ T6841] Code: e8 03 48 89 44 24 38 42 80 3c 38 00 74 08 48 89 ef e8 74 e6 69 fe 48 89 6c 24 20 48 8b 6d 00 48 83 c5 70 48 89 e8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 ef e8 51 e6 69 fe 48 8b 45 00 48 89 44 [ 1464.372290][ T6841] RSP: 0018:ffffc900052174f0 EFLAGS: 00010202 [ 1464.378481][ T6841] RAX: 000000000000000e RBX: ffff8880a8620000 RCX: 4180eefff68da500 [ 1464.386495][ T6841] RDX: ffff8880a65b4280 RSI: 0000000000000000 RDI: ffff8880a8620430 [ 1464.394466][ T6841] RBP: 0000000000000070 R08: ffffffff834afddc R09: ffffed1015d241c3 [ 1464.402443][ T6841] R10: ffffed1015d241c3 R11: 0000000000000000 R12: 1ffff110150c404d [ 1464.410468][ T6841] R13: ffff8880a8620050 R14: ffff8880a862026c R15: dffffc0000000000 [ 1464.418481][ T6841] FS: 00000000011fa880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 1464.427530][ T6841] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1464.434085][ T6841] CR2: 00007ffd68a4a000 CR3: 00000000973a4000 CR4: 00000000001506e0 [ 1464.442065][ T6841] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1464.450078][ T6841] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1464.458055][ T6841] Kernel panic - not syncing: Fatal exception [ 1464.465591][ T6841] Kernel Offset: disabled [ 1464.469902][ T6841] Rebooting in 86400 seconds..