Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 44.577746] can: request_module (can-proto-0) failed. [ 44.580637] can: request_module (can-proto-0) failed. [ 45.313619] IPVS: ftp: loaded support on port[0] = 21 [ 45.570468] 8021q: adding VLAN 0 to HW filter on device bond0 [ 45.601387] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 45.722265] tipc: TX() has been purged, node left! [ 46.371247] bond0 (unregistering): Released all slaves Warning: Permanently added '10.128.0.208' (ECDSA) to the list of known hosts. 2020/08/27 04:40:51 parsed 1 programs 2020/08/27 04:40:51 executed programs: 0 [ 52.316197] IPVS: ftp: loaded support on port[0] = 21 [ 52.369404] IPVS: ftp: loaded support on port[0] = 21 [ 52.372352] IPVS: ftp: loaded support on port[0] = 21 [ 52.416817] IPVS: ftp: loaded support on port[0] = 21 [ 52.437221] gfs2: fsid=loop3: Trying to join cluster "lock_nolock", "loop3" [ 52.442000] IPVS: ftp: loaded support on port[0] = 21 [ 52.444412] gfs2: fsid=loop3: Now mounting FS... [ 52.460435] gfs2: fsid=loop3.0: journal 0 mapped with 1 extents in 0ms [ 52.462421] IPVS: ftp: loaded support on port[0] = 21 [ 52.467421] gfs2: fsid=loop3.0: jid=0, already locked for use [ 52.478382] gfs2: fsid=loop3.0: jid=0: Looking at journal... [ 52.494630] gfs2: fsid=loop5: Trying to join cluster "lock_nolock", "loop5" [ 52.501819] gfs2: fsid=loop5: Now mounting FS... [ 52.502283] gfs2: fsid=loop1: Trying to join cluster "lock_nolock", "loop1" [ 52.513763] gfs2: fsid=loop1: Now mounting FS... [ 52.548277] gfs2: fsid=loop3.0: jid=0: Journal head lookup took 69ms [ 52.552378] gfs2: fsid=loop0: Trying to join cluster "lock_nolock", "loop0" [ 52.557553] gfs2: fsid=loop1.0: journal 0 mapped with 1 extents in 0ms [ 52.561999] gfs2: fsid=loop0: Now mounting FS... [ 52.574839] gfs2: fsid=loop0.0: journal 0 mapped with 1 extents in 0ms [ 52.581991] gfs2: fsid=loop0.0: jid=0, already locked for use [ 52.585661] gfs2: fsid=loop3.0: jid=0: Done [ 52.587918] gfs2: fsid=loop0.0: jid=0: Looking at journal... [ 52.600200] gfs2: fsid=loop3.0: first mount done, others may mount [ 52.608893] gfs2: fsid=loop5.0: journal 0 mapped with 1 extents in 0ms [ 52.614563] gfs2: fsid=loop0.0: jid=0: Journal head lookup took 26ms [ 52.622274] gfs2: fsid=loop0.0: jid=0: Done [ 52.626690] gfs2: fsid=loop0.0: first mount done, others may mount [ 52.638641] gfs2: fsid=loop2: Trying to join cluster "lock_nolock", "loop2" [ 52.645919] gfs2: fsid=loop2: Now mounting FS... [ 52.676314] gfs2: fsid=loop2.0: journal 0 mapped with 1 extents in 0ms [ 52.678951] gfs2: fsid=loop1.0: jid=0, already locked for use [ 52.683091] gfs2: fsid=loop2.0: jid=0, already locked for use [ 52.688963] gfs2: fsid=loop1.0: jid=0: Looking at journal... [ 52.700775] gfs2: fsid=loop2.0: jid=0: Looking at journal... [ 52.736179] gfs2: fsid=loop2.0: jid=0: Journal head lookup took 35ms [ 52.742063] gfs2: fsid=loop4: Trying to join cluster "lock_nolock", "loop4" [ 52.746703] gfs2: fsid=loop2.0: jid=0: Done [ 52.749898] gfs2: fsid=loop4: Now mounting FS... [ 52.759047] gfs2: fsid=loop2.0: first mount done, others may mount [ 52.767290] gfs2: fsid=loop0.0: found 1 quota changes [ 52.777178] gfs2: fsid=loop5.0: jid=0, already locked for use [ 52.783094] gfs2: fsid=loop5.0: jid=0: Looking at journal... [ 52.792670] gfs2: fsid=loop3.0: found 1 quota changes [ 52.807633] gfs2: fsid=loop1.0: jid=0: Journal head lookup took 118ms RESULT: signal 0, coverage 0 errno 0 RESULT: signal 0, coverage 0 errno 0 [ 52.847318] gfs2: fsid=loop1.0: jid=0: Done [ 52.851743] gfs2: fsid=loop1.0: first mount done, others may mount [ 52.893217] gfs2: fsid=loop4.0: journal 0 mapped with 1 extents in 0ms [ 52.900982] gfs2: fsid=loop5.0: jid=0: Journal head lookup took 117ms [ 52.942657] gfs2: fsid=loop5.0: jid=0: Done [ 52.947232] gfs2: fsid=loop5.0: first mount done, others may mount [ 52.952429] gfs2: fsid=loop4.0: jid=0, already locked for use [ 52.959518] gfs2: fsid=loop4.0: jid=0: Looking at journal... [ 52.964145] gfs2: fsid=loop2.0: found 1 quota changes [ 52.979822] ------------[ cut here ]------------ [ 52.984679] WARNING: CPU: 1 PID: 3664 at include/linux/backing-dev.h:338 account_page_dirtied+0x265/0x300 [ 52.994368] Kernel panic - not syncing: panic_on_warn set ... [ 53.000234] CPU: 1 PID: 3664 Comm: syz-executor Not tainted 5.9.0-rc2-syzkaller #0 [ 53.007922] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.011682] gfs2: fsid=loop5.0: found 1 quota changes [ 53.017265] Call Trace: [ 53.017299] dump_stack+0xb9/0xf1 [ 53.028487] panic+0x115/0x30c [ 53.031665] ? account_page_dirtied+0x265/0x300 [ 53.036319] __warn.cold.13+0x20/0x26 [ 53.040113] ? account_page_dirtied+0x265/0x300 [ 53.044800] report_bug+0xc5/0x100 [ 53.048337] handle_bug+0x39/0xa0 [ 53.051779] exc_invalid_op+0x18/0x70 [ 53.055563] asm_exc_invalid_op+0x12/0x20 [ 53.059698] RIP: 0010:account_page_dirtied+0x265/0x300 [ 53.063103] gfs2: fsid=loop1.0: found 1 quota changes [ 53.064972] Code: e8 40 6f a4 01 85 c0 0f 85 36 fe ff ff 49 8b 86 a8 01 00 00 be ff ff ff ff 48 8d 78 70 e8 23 6f a4 01 85 c0 0f 85 19 fe ff ff <0f> 0b e9 12 fe ff ff 4c 89 e6 4c 89 f7 e8 a9 2d 0f 00 e9 f4 fd ff [ 53.064975] RSP: 0018:ffffc9000036baa8 EFLAGS: 00010046 [ 53.064978] RAX: 0000000000000000 RBX: ffffea0008085bc0 RCX: 0000000000000000 [ 53.064980] RDX: ffff88820f3b8500 RSI: ffff888216ff70d0 RDI: 0000000000000082 [ 53.064982] RBP: ffffc9000036bac8 R08: 0000000000000231 R09: 0000000000000001 [ 53.064984] R10: 0000000000000001 R11: ec728b3263e4ab96 R12: ffffea0008085bc0 [ 53.064986] R13: ffff888205da8c28 R14: ffff8882150d4258 R15: 0000000000000000 [ 53.064999] ? account_page_dirtied+0x25d/0x300 [ 53.135494] __set_page_dirty+0x52/0xc0 [ 53.139439] mark_buffer_dirty+0x118/0x170 [ 53.143644] gfs2_unpin+0x63/0x350 [ 53.147166] buf_lo_after_commit+0x58/0x70 [ 53.151403] gfs2_log_flush+0x49f/0xdd0 [ 53.155362] ? kfree+0x131/0x270 [ 53.158699] ? trace_hardirqs_on+0x2b/0x100 [ 53.163172] do_sync+0x21f/0x540 [ 53.166513] gfs2_quota_sync+0x177/0x220 [ 53.170544] gfs2_sync_fs+0x1b/0x50 [ 53.174144] sync_filesystem+0x3d/0x90 [ 53.178019] generic_shutdown_super+0x22/0x100 [ 53.182658] kill_block_super+0x22/0x50 [ 53.186606] gfs2_kill_sb+0x63/0x70 [ 53.190205] deactivate_locked_super+0x30/0x70 [ 53.194763] deactivate_super+0x4c/0x50 [ 53.198707] cleanup_mnt+0xb8/0x140 [ 53.202320] __cleanup_mnt+0xd/0x10 [ 53.205928] task_work_run+0x6d/0xc0 [ 53.209638] exit_to_user_mode_prepare+0x1b0/0x1c0 [ 53.214562] syscall_exit_to_user_mode+0x63/0x290 [ 53.219386] do_syscall_64+0x43/0x80 [ 53.223080] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.228257] RIP: 0033:0x457a57 [ 53.231421] 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 [ 53.250311] RSP: 002b:00007fffb1078ff8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 [ 53.258002] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000457a57 [ 53.265244] RDX: 0000000001b6f9db RSI: 0000000000000002 RDI: 00007fffb107a160 [ 53.272502] RBP: 00007fffb107a160 R08: 0000000000000000 R09: 0000000000000009 [ 53.279760] R10: 0000000000000005 R11: 0000000000000246 R12: 0000000001b6f940 [ 53.287004] R13: 0000000000000000 R14: 0000000000000002 R15: 000000000000cd1c [ 53.294771] Kernel Offset: disabled [ 53.298437] Rebooting in 86400 seconds..