[ 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... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.112' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 1348.673342][ T6859] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 1348.681848][ T6859] gfs2: fsid=syz:syz: Now mounting FS... [ 1348.690221][ T6859] gfs2: fsid=syz:syz.0: fatal: invalid metadata block [ 1348.690221][ T6859] bh = 2072 (magic number) [ 1348.690221][ T6859] function = gfs2_meta_indirect_buffer, file = fs/gfs2/meta_io.c, line = 417 [ 1348.710873][ T6859] gfs2: fsid=syz:syz.0: about to withdraw this file system [ 1348.718571][ T6859] general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN [ 1348.730259][ T6859] KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077] [ 1348.738638][ T6859] CPU: 1 PID: 6859 Comm: syz-executor450 Not tainted 5.9.0-rc8-syzkaller #0 [ 1348.747273][ T6859] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1348.757311][ T6859] RIP: 0010:gfs2_withdraw+0x2b0/0xe20 [ 1348.762657][ T6859] 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 [ 1348.782247][ T6859] RSP: 0018:ffffc90000e274f0 EFLAGS: 00010202 [ 1348.788283][ T6859] RAX: 000000000000000e RBX: ffff888088408000 RCX: de9a90c3866e3e00 [ 1348.796235][ T6859] RDX: ffff88809679e400 RSI: 0000000000000000 RDI: ffff888088408430 [ 1348.804197][ T6859] RBP: 0000000000000070 R08: ffffffff834afd9c R09: ffffed1015d262c0 [ 1348.812139][ T6859] R10: ffffed1015d262c0 R11: 0000000000000000 R12: 1ffff1101108104d [ 1348.820080][ T6859] R13: ffff888088408050 R14: ffff88808840826c R15: dffffc0000000000 [ 1348.828031][ T6859] FS: 00000000025c2880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 1348.836929][ T6859] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1348.843481][ T6859] CR2: 00007f1a49011000 CR3: 0000000094e9a000 CR4: 00000000001506e0 [ 1348.851472][ T6859] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1348.859446][ T6859] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1348.867402][ T6859] Call Trace: [ 1348.870667][ T6859] gfs2_meta_check_ii+0x70/0x80 [ 1348.875485][ T6859] gfs2_meta_indirect_buffer+0x29f/0x380 [ 1348.881086][ T6859] gfs2_inode_refresh+0x65/0xc00 [ 1348.885991][ T6859] inode_go_lock+0x12c/0x480 [ 1348.890548][ T6859] do_promote+0x4db/0xcd0 [ 1348.894847][ T6859] finish_xmote+0x907/0x1350 [ 1348.899406][ T6859] do_xmote+0xadb/0x14c0 [ 1348.903617][ T6859] gfs2_glock_nq+0xac3/0x14d0 [ 1348.908274][ T6859] gfs2_lookupi+0x36f/0x4f0 [ 1348.912747][ T6859] ? gfs2_lookupi+0x367/0x4f0 [ 1348.917392][ T6859] gfs2_lookup_simple+0xa4/0x100 [ 1348.922296][ T6859] init_journal+0x132/0x1970 [ 1348.926867][ T6859] ? vsnprintf+0x1a12/0x1aa0 [ 1348.931426][ T6859] ? snprintf+0x6f/0x90 [ 1348.935548][ T6859] ? _raw_spin_unlock+0x24/0x40 [ 1348.940462][ T6859] gfs2_fill_super+0x2717/0x3fe0 [ 1348.945371][ T6859] ? gfs2_glock_nq_num+0xaa/0x1d0 [ 1348.950362][ T6859] ? snprintf+0x6f/0x90 [ 1348.954499][ T6859] ? set_blocksize+0x1f5/0x3c0 [ 1348.959233][ T6859] get_tree_bdev+0x3e9/0x5f0 [ 1348.963789][ T6859] ? gfs2_reconfigure+0xe10/0xe10 [ 1348.968779][ T6859] gfs2_get_tree+0x4c/0x1f0 [ 1348.973251][ T6859] vfs_get_tree+0x88/0x270 [ 1348.977634][ T6859] path_mount+0x179d/0x29e0 [ 1348.982106][ T6859] __se_sys_mount+0x126/0x180 [ 1348.986749][ T6859] do_syscall_64+0x31/0x70 [ 1348.991132][ T6859] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1348.996989][ T6859] RIP: 0033:0x45b4ca [ 1349.000863][ T6859] 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 [ 1349.020445][ T6859] RSP: 002b:00007ffeb4cffe98 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 [ 1349.028835][ T6859] RAX: ffffffffffffffda RBX: 00007ffeb4cffef0 RCX: 000000000045b4ca [ 1349.036775][ T6859] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffeb4cffeb0 [ 1349.044716][ T6859] RBP: 00007ffeb4cffeb0 R08: 00007ffeb4cffef0 R09: 00007ffe00000015 [ 1349.052657][ T6859] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c [ 1349.060608][ T6859] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 1349.068550][ T6859] Modules linked in: [ 1349.072809][ T6859] ---[ end trace d7b27398da2406a5 ]--- [ 1349.078353][ T6859] RIP: 0010:gfs2_withdraw+0x2b0/0xe20 [ 1349.083710][ T6859] 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 [ 1349.103374][ T6859] RSP: 0018:ffffc90000e274f0 EFLAGS: 00010202 [ 1349.109486][ T6859] RAX: 000000000000000e RBX: ffff888088408000 RCX: de9a90c3866e3e00 [ 1349.117492][ T6859] RDX: ffff88809679e400 RSI: 0000000000000000 RDI: ffff888088408430 [ 1349.125537][ T6859] RBP: 0000000000000070 R08: ffffffff834afd9c R09: ffffed1015d262c0 [ 1349.133523][ T6859] R10: ffffed1015d262c0 R11: 0000000000000000 R12: 1ffff1101108104d [ 1349.141533][ T6859] R13: ffff888088408050 R14: ffff88808840826c R15: dffffc0000000000 [ 1349.149570][ T6859] FS: 00000000025c2880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 1349.158541][ T6859] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1349.165109][ T6859] CR2: 00007f1a49011000 CR3: 0000000094e9a000 CR4: 00000000001506e0 [ 1349.174101][ T6859] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1349.182144][ T6859] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1349.190143][ T6859] Kernel panic - not syncing: Fatal exception [ 1349.197450][ T6859] Kernel Offset: disabled [ 1349.201758][ T6859] Rebooting in 86400 seconds..