Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 45.475632] can: request_module (can-proto-0) failed. [ 45.479009] can: request_module (can-proto-0) failed. [ 46.180230] IPVS: ftp: loaded support on port[0] = 21 [ 46.423134] 8021q: adding VLAN 0 to HW filter on device bond0 [ 46.452170] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 46.588638] tipc: TX() has been purged, node left! [ 47.233102] bond0 (unregistering): Released all slaves Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts. 2020/07/26 20:28:16 parsed 1 programs 2020/07/26 20:28:16 executed programs: 0 [ 53.185470] IPVS: ftp: loaded support on port[0] = 21 [ 53.226151] IPVS: ftp: loaded support on port[0] = 21 [ 53.256249] IPVS: ftp: loaded support on port[0] = 21 [ 53.257018] IPVS: ftp: loaded support on port[0] = 21 [ 53.279149] IPVS: ftp: loaded support on port[0] = 21 [ 53.281255] IPVS: ftp: loaded support on port[0] = 21 [ 53.286341] gfs2: fsid=loop4: Trying to join cluster "lock_nolock", "loop4" [ 53.296808] gfs2: fsid=loop4: Now mounting FS... [ 53.296829] gfs2: fsid=loop2: Trying to join cluster "lock_nolock", "loop2" [ 53.308737] gfs2: fsid=loop2: Now mounting FS... [ 53.316265] gfs2: fsid=loop2.0: journal 0 mapped with 1 extents in 0ms [ 53.323120] gfs2: fsid=loop2.0: jid=0, already locked for use [ 53.329093] gfs2: fsid=loop2.0: jid=0: Looking at journal... [ 53.363573] gfs2: fsid=loop2.0: jid=0: Journal head lookup took 34ms [ 53.370443] gfs2: fsid=loop2.0: jid=0: Done [ 53.375383] gfs2: fsid=loop2.0: first mount done, others may mount [ 53.399031] gfs2: fsid=loop3: Trying to join cluster "lock_nolock", "loop3" [ 53.406257] gfs2: fsid=loop3: Now mounting FS... [ 53.418381] gfs2: fsid=loop4.0: journal 0 mapped with 1 extents in 0ms [ 53.419483] gfs2: fsid=loop2.0: found 1 quota changes [ 53.425258] gfs2: fsid=loop4.0: jid=0, already locked for use [ 53.436242] gfs2: fsid=loop4.0: jid=0: Looking at journal... [ 53.450420] gfs2: fsid=loop3.0: journal 0 mapped with 1 extents in 0ms [ 53.452958] gfs2: fsid=loop0: Trying to join cluster "lock_nolock", "loop0" RESULT: signal 0, coverage 0 errno 0 [ 53.457200] gfs2: fsid=loop3.0: jid=0, already locked for use [ 53.464265] gfs2: fsid=loop0: Now mounting FS... [ 53.468808] gfs2: fsid=loop1: Trying to join cluster "lock_nolock", "loop1" [ 53.470182] gfs2: fsid=loop3.0: jid=0: Looking at journal... [ 53.474957] gfs2: fsid=loop1: Now mounting FS... [ 53.475930] gfs2: fsid=loop1.0: journal 0 mapped with 1 extents in 0ms [ 53.505783] ------------[ cut here ]------------ [ 53.510642] WARNING: CPU: 1 PID: 3583 at include/linux/backing-dev.h:345 account_page_dirtied+0x262/0x2f0 [ 53.520329] Kernel panic - not syncing: panic_on_warn set ... [ 53.520386] gfs2: fsid=loop1.0: jid=0, already locked for use [ 53.526191] CPU: 1 PID: 3583 Comm: syz-executor2 Not tainted 5.8.0-rc6-syzkaller #0 [ 53.526210] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.532098] gfs2: fsid=loop1.0: jid=0: Looking at journal... [ 53.539952] Call Trace: [ 53.539963] dump_stack+0xb9/0xf1 [ 53.539968] panic+0x115/0x30c [ 53.539976] ? account_page_dirtied+0x262/0x2f0 [ 53.539979] __warn.cold.13+0x20/0x26 [ 53.539982] ? account_page_dirtied+0x262/0x2f0 [ 53.539985] report_bug+0xc5/0x100 [ 53.539991] handle_bug+0x39/0xa0 [ 53.539993] exc_invalid_op+0x18/0x70 [ 53.539998] asm_exc_invalid_op+0x12/0x20 [ 53.540001] RIP: 0010:account_page_dirtied+0x262/0x2f0 [ 53.540004] Code: e8 e3 67 a1 01 85 c0 0f 85 39 fe ff ff 49 8b 86 a8 01 00 00 be ff ff ff ff 48 8d 78 70 e8 c6 67 a1 01 85 c0 0f 85 1c fe ff ff <0f> 0b e9 15 fe ff ff 4c 89 e6 4c 89 f7 e8 fc 0e 0f 00 e9 f7 fd ff [ 53.555619] gfs2: fsid=loop4.0: jid=0: Journal head lookup took 119ms [ 53.557689] RSP: 0018:ffffc9000019ba98 EFLAGS: 00010046 [ 53.557693] RAX: 0000000000000000 RBX: ffffea0008385940 RCX: 0000000000000000 [ 53.557694] RDX: ffff88820e1ec540 RSI: ffff8882144ba0e0 RDI: 0000000000000086 [ 53.557696] RBP: ffffc9000019bab8 R08: 000000000000022c R09: 0000000000000008 [ 53.557698] R10: 0000000000000001 R11: 975c4c2ac546eb45 R12: ffffea0008385940 [ 53.557699] R13: ffff888209acac28 R14: ffff8882154e73b8 R15: 0000000000000000 [ 53.557714] ? account_page_dirtied+0x25a/0x2f0 [ 53.561359] gfs2: fsid=loop4.0: jid=0: Done [ 53.564439] __set_page_dirty+0x52/0xc0 [ 53.564444] mark_buffer_dirty+0x118/0x170 [ 53.564449] gfs2_unpin+0x63/0x350 [ 53.564454] buf_lo_after_commit+0x58/0x70 [ 53.564458] gfs2_log_flush+0x49f/0xdd0 [ 53.564463] ? kfree+0x131/0x270 [ 53.564467] ? trace_hardirqs_on+0x2b/0x100 [ 53.564473] do_sync+0x21f/0x540 [ 53.594632] gfs2: fsid=loop1.0: jid=0: Journal head lookup took 62ms [ 53.597777] gfs2_quota_sync+0x177/0x220 [ 53.597784] gfs2_sync_fs+0x1b/0x50 [ 53.616759] gfs2: fsid=loop1.0: jid=0: Done [ 53.623229] sync_filesystem+0x3d/0x90 [ 53.623233] generic_shutdown_super+0x22/0x100 [ 53.623236] kill_block_super+0x22/0x50 [ 53.623240] gfs2_kill_sb+0x63/0x70 [ 53.623243] deactivate_locked_super+0x30/0x70 [ 53.623246] deactivate_super+0x4c/0x50 [ 53.623250] cleanup_mnt+0xb8/0x140 [ 53.623253] __cleanup_mnt+0xd/0x10 [ 53.623257] task_work_run+0x6d/0xc0 [ 53.623264] __prepare_exit_to_usermode+0x1da/0x1e0 [ 53.629932] gfs2: fsid=loop1.0: first mount done, others may mount [ 53.635853] __syscall_return_slowpath+0x5a/0x250 [ 53.635859] do_syscall_64+0x7b/0xf0 [ 53.635863] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.635867] RIP: 0033:0x457a57 [ 53.635872] Code: 44 00 00 b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d 8f fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d 8f fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 53.635874] RSP: 002b:00007ffd921606a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 [ 53.635877] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000457a57 [ 53.676308] gfs2: fsid=loop1.0: found 1 quota changes [ 53.677816] RDX: 00000000010cb9bb RSI: 0000000000000002 RDI: 00007ffd92161810 [ 53.677819] RBP: 00007ffd92161810 R08: 0000000000000000 R09: 0000000000000009 [ 53.677820] R10: 0000000000000005 R11: 0000000000000246 R12: 00000000010cb940 [ 53.677822] R13: 0000000000000000 R14: 0000000000000002 R15: 000000000000d047 [ 53.682767] Kernel Offset: disabled [ 53.858725] Rebooting in 86400 seconds..