[ 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 '10.128.0.174' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 1583.544558][ T6855] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 1583.552864][ T6855] gfs2: fsid=syz:syz: Now mounting FS... [ 1583.561114][ T6855] gfs2: fsid=syz:syz.0: fatal: invalid metadata block [ 1583.561114][ T6855] bh = 2072 (magic number) [ 1583.561114][ T6855] function = gfs2_meta_indirect_buffer, file = fs/gfs2/meta_io.c, line = 417 [ 1583.581182][ T6855] gfs2: fsid=syz:syz.0: about to withdraw this file system [ 1583.588478][ T6855] general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN [ 1583.600161][ T6855] KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077] [ 1583.608569][ T6855] CPU: 1 PID: 6855 Comm: syz-executor067 Not tainted 5.9.0-rc8-syzkaller #0 [ 1583.617204][ T6855] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1583.627435][ T6855] RIP: 0010:gfs2_withdraw+0x2b0/0xe20 [ 1583.632793][ T6855] 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 [ 1583.652372][ T6855] RSP: 0018:ffffc900010074f0 EFLAGS: 00010202 [ 1583.658408][ T6855] RAX: 000000000000000e RBX: ffff8880a752c000 RCX: ef191457fea43200 [ 1583.666352][ T6855] RDX: ffff888091ba8100 RSI: 0000000000000000 RDI: ffff8880a752c430 [ 1583.674292][ T6855] RBP: 0000000000000070 R08: ffffffff834afd9c R09: ffffed1015d262c0 [ 1583.682244][ T6855] R10: ffffed1015d262c0 R11: 0000000000000000 R12: 1ffff11014ea584d [ 1583.690291][ T6855] R13: ffff8880a752c050 R14: ffff8880a752c26c R15: dffffc0000000000 [ 1583.698250][ T6855] FS: 00000000012e2940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 1583.707579][ T6855] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1583.714334][ T6855] CR2: 00007fe834c366c0 CR3: 00000000a131d000 CR4: 00000000001506e0 [ 1583.722291][ T6855] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1583.730255][ T6855] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1583.738200][ T6855] Call Trace: [ 1583.741497][ T6855] gfs2_meta_check_ii+0x70/0x80 [ 1583.746524][ T6855] gfs2_meta_indirect_buffer+0x29f/0x380 [ 1583.752255][ T6855] gfs2_inode_refresh+0x65/0xc00 [ 1583.757182][ T6855] inode_go_lock+0x12c/0x480 [ 1583.761746][ T6855] do_promote+0x4db/0xcd0 [ 1583.766164][ T6855] finish_xmote+0x907/0x1350 [ 1583.770792][ T6855] do_xmote+0xadb/0x14c0 [ 1583.775114][ T6855] gfs2_glock_nq+0xac3/0x14d0 [ 1583.779870][ T6855] gfs2_lookupi+0x36f/0x4f0 [ 1583.784884][ T6855] ? gfs2_lookupi+0x367/0x4f0 [ 1583.789997][ T6855] gfs2_lookup_simple+0xa4/0x100 [ 1583.794916][ T6855] init_journal+0x132/0x1970 [ 1583.804441][ T6855] ? vsnprintf+0x1a12/0x1aa0 [ 1583.809077][ T6855] ? snprintf+0x6f/0x90 [ 1583.813465][ T6855] ? _raw_spin_unlock+0x24/0x40 [ 1583.818307][ T6855] gfs2_fill_super+0x2717/0x3fe0 [ 1583.823508][ T6855] ? gfs2_glock_nq_num+0xaa/0x1d0 [ 1583.828505][ T6855] ? snprintf+0x6f/0x90 [ 1583.832732][ T6855] ? set_blocksize+0x1f5/0x3c0 [ 1583.838251][ T6855] get_tree_bdev+0x3e9/0x5f0 [ 1583.842836][ T6855] ? gfs2_reconfigure+0xe10/0xe10 [ 1583.847845][ T6855] gfs2_get_tree+0x4c/0x1f0 [ 1583.852321][ T6855] vfs_get_tree+0x88/0x270 [ 1583.856776][ T6855] path_mount+0x179d/0x29e0 [ 1583.861282][ T6855] __se_sys_mount+0x126/0x180 [ 1583.866025][ T6855] do_syscall_64+0x31/0x70 [ 1583.870683][ T6855] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1583.876544][ T6855] RIP: 0033:0x4abeca [ 1583.880409][ T6855] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 9d 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 7a ad fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 1583.899990][ T6855] RSP: 002b:00007ffde9610678 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 [ 1583.908408][ T6855] RAX: ffffffffffffffda RBX: 00007ffde96106d0 RCX: 00000000004abeca [ 1583.916444][ T6855] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffde9610690 [ 1583.924384][ T6855] RBP: 00007ffde9610690 R08: 00007ffde96106d0 R09: 0000000000000000 [ 1583.932323][ T6855] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c [ 1583.940264][ T6855] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 1583.948212][ T6855] Modules linked in: [ 1583.952473][ T6855] ---[ end trace 311ec650d1df2322 ]--- [ 1583.957980][ T6855] RIP: 0010:gfs2_withdraw+0x2b0/0xe20 [ 1583.963341][ T6855] 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 [ 1583.982996][ T6855] RSP: 0018:ffffc900010074f0 EFLAGS: 00010202 [ 1583.989106][ T6855] RAX: 000000000000000e RBX: ffff8880a752c000 RCX: ef191457fea43200 [ 1583.997202][ T6855] RDX: ffff888091ba8100 RSI: 0000000000000000 RDI: ffff8880a752c430 [ 1584.005237][ T6855] RBP: 0000000000000070 R08: ffffffff834afd9c R09: ffffed1015d262c0 [ 1584.013209][ T6855] R10: ffffed1015d262c0 R11: 0000000000000000 R12: 1ffff11014ea584d [ 1584.021246][ T6855] R13: ffff8880a752c050 R14: ffff8880a752c26c R15: dffffc0000000000 [ 1584.029292][ T6855] FS: 00000000012e2940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 1584.038281][ T6855] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1584.044901][ T6855] CR2: 00007fe834c366c0 CR3: 00000000a131d000 CR4: 00000000001506e0 [ 1584.052859][ T6855] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1584.060869][ T6855] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1584.068868][ T6855] Kernel panic - not syncing: Fatal exception [ 1584.076184][ T6855] Kernel Offset: disabled [ 1584.080499][ T6855] Rebooting in 86400 seconds..