[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.49' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 1345.549197][ T6853] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 1345.558018][ T6853] gfs2: fsid=syz:syz: Now mounting FS... [ 1345.566017][ T6853] gfs2: fsid=syz:syz.0: fatal: invalid metadata block [ 1345.566017][ T6853] bh = 2072 (magic number) [ 1345.566017][ T6853] function = gfs2_meta_indirect_buffer, file = fs/gfs2/meta_io.c, line = 417 [ 1345.586425][ T6853] gfs2: fsid=syz:syz.0: about to withdraw this file system [ 1345.593749][ T6853] general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN [ 1345.605632][ T6853] KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077] [ 1345.614038][ T6853] CPU: 1 PID: 6853 Comm: syz-executor363 Not tainted 5.9.0-rc8-syzkaller #0 [ 1345.622674][ T6853] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1345.632809][ T6853] RIP: 0010:gfs2_withdraw+0x2b0/0xe20 [ 1345.638162][ T6853] Code: e8 03 48 89 44 24 38 42 80 3c 38 00 74 08 48 89 ef e8 f4 e4 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 d1 e4 69 fe 48 8b 45 00 48 89 44 [ 1345.657735][ T6853] RSP: 0018:ffffc90001d0f4f0 EFLAGS: 00010202 [ 1345.663768][ T6853] RAX: 000000000000000e RBX: ffff888097e90000 RCX: a4b18bd6390a5400 [ 1345.671709][ T6853] RDX: ffff8880a7664200 RSI: 0000000000000000 RDI: ffff888097e90430 [ 1345.679648][ T6853] RBP: 0000000000000070 R08: ffffffff834afd9c R09: ffffed1015d262c0 [ 1345.687610][ T6853] R10: ffffed1015d262c0 R11: 0000000000000000 R12: 1ffff11012fd204d [ 1345.695565][ T6853] R13: ffff888097e90050 R14: ffff888097e9026c R15: dffffc0000000000 [ 1345.703507][ T6853] FS: 0000000000a23880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 1345.712401][ T6853] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1345.718950][ T6853] CR2: 00007ff2dfd156c0 CR3: 00000000a9a98000 CR4: 00000000001506e0 [ 1345.726895][ T6853] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1345.734847][ T6853] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1345.742786][ T6853] Call Trace: [ 1345.746068][ T6853] gfs2_meta_check_ii+0x70/0x80 [ 1345.750945][ T6853] gfs2_meta_indirect_buffer+0x29f/0x380 [ 1345.756545][ T6853] gfs2_inode_refresh+0x65/0xc00 [ 1345.761463][ T6853] inode_go_lock+0x12c/0x480 [ 1345.766019][ T6853] do_promote+0x4db/0xcd0 [ 1345.770318][ T6853] finish_xmote+0x907/0x1350 [ 1345.774874][ T6853] do_xmote+0xadb/0x14c0 [ 1345.779084][ T6853] gfs2_glock_nq+0xac3/0x14d0 [ 1345.783730][ T6853] gfs2_lookupi+0x36f/0x4f0 [ 1345.788201][ T6853] ? gfs2_lookupi+0x367/0x4f0 [ 1345.792845][ T6853] gfs2_lookup_simple+0xa4/0x100 [ 1345.797761][ T6853] init_journal+0x132/0x1970 [ 1345.802417][ T6853] ? vsnprintf+0x1a12/0x1aa0 [ 1345.806976][ T6853] ? snprintf+0x6f/0x90 [ 1345.811178][ T6853] ? _raw_spin_unlock+0x24/0x40 [ 1345.815998][ T6853] gfs2_fill_super+0x2717/0x3fe0 [ 1345.820922][ T6853] ? gfs2_glock_nq_num+0xaa/0x1d0 [ 1345.825938][ T6853] ? snprintf+0x6f/0x90 [ 1345.830151][ T6853] ? set_blocksize+0x1f5/0x3c0 [ 1345.834949][ T6853] get_tree_bdev+0x3e9/0x5f0 [ 1345.839508][ T6853] ? gfs2_reconfigure+0xe10/0xe10 [ 1345.844500][ T6853] gfs2_get_tree+0x4c/0x1f0 [ 1345.848973][ T6853] vfs_get_tree+0x88/0x270 [ 1345.853386][ T6853] path_mount+0x179d/0x29e0 [ 1345.857859][ T6853] __se_sys_mount+0x126/0x180 [ 1345.862506][ T6853] do_syscall_64+0x31/0x70 [ 1345.866889][ T6853] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1345.872747][ T6853] RIP: 0033:0x45b45a [ 1345.876618][ T6853] 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 [ 1345.896189][ T6853] RSP: 002b:00007ffd825bc658 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 [ 1345.904675][ T6853] RAX: ffffffffffffffda RBX: 00007ffd825bc6b0 RCX: 000000000045b45a [ 1345.912615][ T6853] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd825bc670 [ 1345.920552][ T6853] RBP: 00007ffd825bc670 R08: 00007ffd825bc6b0 R09: 00007ffd00000015 [ 1345.928491][ T6853] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000919 [ 1345.936430][ T6853] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 1345.944371][ T6853] Modules linked in: [ 1345.948517][ T6853] ---[ end trace af8ff335c9311267 ]--- [ 1345.954035][ T6853] RIP: 0010:gfs2_withdraw+0x2b0/0xe20 [ 1345.959393][ T6853] Code: e8 03 48 89 44 24 38 42 80 3c 38 00 74 08 48 89 ef e8 f4 e4 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 d1 e4 69 fe 48 8b 45 00 48 89 44 [ 1345.979031][ T6853] RSP: 0018:ffffc90001d0f4f0 EFLAGS: 00010202 [ 1345.985114][ T6853] RAX: 000000000000000e RBX: ffff888097e90000 RCX: a4b18bd6390a5400 [ 1345.993108][ T6853] RDX: ffff8880a7664200 RSI: 0000000000000000 RDI: ffff888097e90430 [ 1346.001095][ T6853] RBP: 0000000000000070 R08: ffffffff834afd9c R09: ffffed1015d262c0 [ 1346.009048][ T6853] R10: ffffed1015d262c0 R11: 0000000000000000 R12: 1ffff11012fd204d [ 1346.017036][ T6853] R13: ffff888097e90050 R14: ffff888097e9026c R15: dffffc0000000000 [ 1346.025022][ T6853] FS: 0000000000a23880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 1346.033975][ T6853] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1346.040581][ T6853] CR2: 00007ff2dfd156c0 CR3: 00000000a9a98000 CR4: 00000000001506e0 [ 1346.048531][ T6853] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1346.056509][ T6853] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1346.064505][ T6853] Kernel panic - not syncing: Fatal exception [ 1346.071943][ T6853] Kernel Offset: disabled [ 1346.076251][ T6853] Rebooting in 86400 seconds..