[ OK ] Started OpenBSD Secure Shell server. [ 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 '10.128.10.39' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 49.231306][ T8473] IPVS: ftp: loaded support on port[0] = 21 [ 49.277164][ T8473] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024) [ 49.287950][ T8473] NILFS (loop0): mounting unchecked fs [ 49.311362][ T8473] NILFS (loop0): recovery complete [ 49.339441][ T8497] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 49.352293][ T8497] ------------[ cut here ]------------ [ 49.358035][ T8497] WARNING: CPU: 0 PID: 8497 at include/linux/backing-dev.h:286 account_page_dirtied+0x4f4/0x5b0 [ 49.368432][ T8497] Modules linked in: [ 49.372321][ T8497] CPU: 0 PID: 8497 Comm: segctord Not tainted 5.10.0-rc6-syzkaller #0 [ 49.380450][ T8497] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.390500][ T8497] RIP: 0010:account_page_dirtied+0x4f4/0x5b0 [ 49.396461][ T8497] Code: 41 5f 5d e9 de 22 20 00 e8 e9 4f d9 ff 42 80 7c 35 00 00 74 08 48 89 df e8 f9 4f 1b 00 4c 89 23 e9 a6 fe ff ff e8 cc 4f d9 ff <0f> 0b 43 80 3c 2c 00 0f 85 55 fd ff ff e9 58 fd ff ff 89 d9 80 e1 [ 49.416048][ T8497] RSP: 0018:ffffc9000132f758 EFLAGS: 00010093 [ 49.422099][ T8497] RAX: ffffffff819bcf34 RBX: ffff888032260490 RCX: ffff888028299a40 [ 49.430055][ T8497] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 49.438004][ T8497] RBP: 0000000000000000 R08: ffffffff819bcc82 R09: fffffbfff1a1c446 [ 49.445954][ T8497] R10: fffffbfff1a1c446 R11: 0000000000000000 R12: 1ffff1100644c092 [ 49.453904][ T8497] R13: dffffc0000000000 R14: ffff888032260318 R15: ffffea0000601900 [ 49.461860][ T8497] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 49.470766][ T8497] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.477328][ T8497] CR2: 000056492a76b0f0 CR3: 00000000123b9000 CR4: 00000000001506f0 [ 49.485279][ T8497] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.493227][ T8497] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.501174][ T8497] Call Trace: [ 49.504448][ T8497] ? __set_page_dirty+0x118/0x380 [ 49.509594][ T8497] __set_page_dirty+0x12a/0x380 [ 49.514452][ T8497] mark_buffer_dirty+0x227/0x2d0 [ 49.519393][ T8497] nilfs_btree_propagate+0x4e1/0xd60 [ 49.524674][ T8497] nilfs_bmap_propagate+0x6d/0x120 [ 49.529776][ T8497] nilfs_collect_dat_data+0x49/0xc0 [ 49.534959][ T8497] ? nilfs_segctor_add_file_block+0x11c0/0x11c0 [ 49.541178][ T8497] nilfs_segctor_scan_file+0xa2e/0x1e70 [ 49.546721][ T8497] ? rcu_read_lock_sched_held+0x41/0xb0 [ 49.552245][ T8497] nilfs_segctor_do_construct+0x225b/0x7a00 [ 49.558180][ T8497] nilfs_segctor_construct+0x14b/0x940 [ 49.563620][ T8497] ? trace_nilfs2_transaction_transition+0x11e/0x250 [ 49.570272][ T8497] nilfs_segctor_thread+0x457/0x1040 [ 49.575558][ T8497] ? nilfs_construction_timeout+0x40/0x40 [ 49.581252][ T8497] kthread+0x39a/0x3c0 [ 49.585299][ T8497] ? nilfs_construction_timeout+0x40/0x40 [ 49.590991][ T8497] ? kthread_blkcg+0xd0/0xd0 [ 49.595559][ T8497] ret_from_fork+0x1f/0x30 [ 49.599964][ T8497] Kernel panic - not syncing: panic_on_warn set ... [ 49.606553][ T8497] CPU: 0 PID: 8497 Comm: segctord Not tainted 5.10.0-rc6-syzkaller #0 [ 49.614675][ T8497] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.624720][ T8497] Call Trace: [ 49.627988][ T8497] dump_stack+0x137/0x1be [ 49.632295][ T8497] ? panic+0x1f3/0x800 [ 49.636345][ T8497] panic+0x291/0x800 [ 49.640219][ T8497] ? __warn+0x13e/0x270 [ 49.644358][ T8497] __warn+0x26a/0x270 [ 49.648323][ T8497] ? account_page_dirtied+0x4f4/0x5b0 [ 49.653674][ T8497] ? account_page_dirtied+0x4f4/0x5b0 [ 49.659024][ T8497] report_bug+0x1b1/0x2e0 [ 49.663338][ T8497] handle_bug+0x3d/0x70 [ 49.667484][ T8497] exc_invalid_op+0x16/0x40 [ 49.671973][ T8497] asm_exc_invalid_op+0x12/0x20 [ 49.676811][ T8497] RIP: 0010:account_page_dirtied+0x4f4/0x5b0 [ 49.682768][ T8497] Code: 41 5f 5d e9 de 22 20 00 e8 e9 4f d9 ff 42 80 7c 35 00 00 74 08 48 89 df e8 f9 4f 1b 00 4c 89 23 e9 a6 fe ff ff e8 cc 4f d9 ff <0f> 0b 43 80 3c 2c 00 0f 85 55 fd ff ff e9 58 fd ff ff 89 d9 80 e1 [ 49.702351][ T8497] RSP: 0018:ffffc9000132f758 EFLAGS: 00010093 [ 49.708400][ T8497] RAX: ffffffff819bcf34 RBX: ffff888032260490 RCX: ffff888028299a40 [ 49.716350][ T8497] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 49.724300][ T8497] RBP: 0000000000000000 R08: ffffffff819bcc82 R09: fffffbfff1a1c446 [ 49.732249][ T8497] R10: fffffbfff1a1c446 R11: 0000000000000000 R12: 1ffff1100644c092 [ 49.740211][ T8497] R13: dffffc0000000000 R14: ffff888032260318 R15: ffffea0000601900 [ 49.748182][ T8497] ? account_page_dirtied+0x242/0x5b0 [ 49.753528][ T8497] ? account_page_dirtied+0x4f4/0x5b0 [ 49.758883][ T8497] ? account_page_dirtied+0x4f4/0x5b0 [ 49.764230][ T8497] ? __set_page_dirty+0x118/0x380 [ 49.769233][ T8497] __set_page_dirty+0x12a/0x380 [ 49.774065][ T8497] mark_buffer_dirty+0x227/0x2d0 [ 49.778984][ T8497] nilfs_btree_propagate+0x4e1/0xd60 [ 49.784279][ T8497] nilfs_bmap_propagate+0x6d/0x120 [ 49.789371][ T8497] nilfs_collect_dat_data+0x49/0xc0 [ 49.794551][ T8497] ? nilfs_segctor_add_file_block+0x11c0/0x11c0 [ 49.800770][ T8497] nilfs_segctor_scan_file+0xa2e/0x1e70 [ 49.806310][ T8497] ? rcu_read_lock_sched_held+0x41/0xb0 [ 49.811850][ T8497] nilfs_segctor_do_construct+0x225b/0x7a00 [ 49.817777][ T8497] nilfs_segctor_construct+0x14b/0x940 [ 49.823224][ T8497] ? trace_nilfs2_transaction_transition+0x11e/0x250 [ 49.829875][ T8497] nilfs_segctor_thread+0x457/0x1040 [ 49.835160][ T8497] ? nilfs_construction_timeout+0x40/0x40 [ 49.840865][ T8497] kthread+0x39a/0x3c0 [ 49.844911][ T8497] ? nilfs_construction_timeout+0x40/0x40 [ 49.850602][ T8497] ? kthread_blkcg+0xd0/0xd0 [ 49.855191][ T8497] ret_from_fork+0x1f/0x30 [ 49.860347][ T8497] Kernel Offset: disabled [ 49.864757][ T8497] Rebooting in 86400 seconds..