Hi Anatoly, Could you please try pending v5.00rc1 or v4.20rc1, since in this round we have fixed this issue with below commit:
edc55aaf0d17 ("f2fs: avoid f2fs_bug_on if f2fs_get_meta_page_nofail got EIO") Thanks, On 2018/10/28 19:50, Anatoly Trosinenko wrote: > Hello, > > When mounting and then unmounting a fuzzed F2FS image, a BUG is > triggered at fs/f2fs/checkpoint.c:127. > > How to reproduce with kvm-xfstests: > 1) Checkout v4.19, copy x86_64-config-4.14 to .config, perform `make > olddefconfig`, then compile > 2) Place the attached image (128M unpacked) to /tmp/kvm-xfstests-$USER > 3) Inside the `kvm-xfstests shell` execute: > > root@kvm-xfstests:~# mount /vtmp > root@kvm-xfstests:~# mount /vtmp/f2fs.img /mnt > [ 11.456857] F2FS-fs (loop0): Found nat_bits in checkpoint > [ 11.460360] F2FS-fs (loop0): Mounted with checkpoint version = 1c8a6001 > root@kvm-xfstests:~# umount /mnt > [ 14.592761] ------------[ cut here ]------------ > [ 14.593218] kernel BUG at fs/f2fs/checkpoint.c:127! > [ 14.593739] invalid opcode: 0000 [#1] SMP PTI > [ 14.594129] CPU: 0 PID: 368 Comm: umount Not tainted 4.19.0-xfstests #1 > [ 14.594710] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), > BIOS 1.11.1-1ubuntu1 04/01/2014 > [ 14.595497] RIP: 0010:f2fs_get_meta_page_nofail+0x41/0x50 > [ 14.596030] Code: 00 00 4c 89 e6 48 89 ef e8 1c f3 ff ff 48 3d 00 > f0 ff ff 76 17 48 83 f8 fb 75 05 83 eb 01 75 dd 31 f6 48 89 ef e8 bf > fe ff ff <0f> 0b 5b 5d 41 5c c3 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 > 31 d2 > [ 14.597784] RSP: 0018:ffffb95ec095fad8 EFLAGS: 00010296 > [ 14.598257] RAX: ffff9982b9d2d280 RBX: 0000000000000009 RCX: > 0000000000000000 > [ 14.598935] RDX: ffffffff00000001 RSI: 0000000000000007 RDI: > 0000000000000246 > [ 14.599608] RBP: ffff9982babe0000 R08: 00000004d0a24803 R09: > 0000000000000001 > [ 14.600286] R10: 0000000000000001 R11: 0000000000000000 R12: > 0000000001201aef > [ 14.600953] R13: ffff9982b9d14c00 R14: 00000000009008ef R15: > 0000000000000001 > [ 14.601625] FS: 0000000000000000(0000) GS:ffff9982bda00000(0063) > knlGS:00000000f7bdab00 > [ 14.602384] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 > [ 14.602899] CR2: 0000000056c95460 CR3: 00000000785ea006 CR4: > 0000000000360ef0 > [ 14.603550] Call Trace: > [ 14.603779] __flush_nat_entry_set+0x118/0x620 > [ 14.604182] f2fs_flush_nat_entries+0x239/0x290 > [ 14.604585] ? __submit_merged_write_cond+0xa7/0x200 > [ 14.605026] ? up_write+0x1c/0x80 > [ 14.605324] ? __submit_merged_write_cond+0xa7/0x200 > [ 14.605764] f2fs_write_checkpoint+0x45c/0x720 > [ 14.606161] f2fs_sync_fs+0xb9/0x1a0 > [ 14.606482] sync_filesystem+0x71/0x90 > [ 14.606818] generic_shutdown_super+0x22/0x100 > [ 14.607214] kill_block_super+0x21/0x50 > [ 14.607558] kill_f2fs_super+0x67/0xc0 > [ 14.607893] deactivate_locked_super+0x2f/0x70 > [ 14.608292] cleanup_mnt+0x3b/0x70 > [ 14.608598] task_work_run+0x9e/0xd0 > [ 14.608919] exit_to_usermode_loop+0xb7/0xc0 > [ 14.609299] do_fast_syscall_32+0x267/0x2f0 > [ 14.609672] entry_SYSENTER_compat+0x84/0x96 > [ 14.610082] ---[ end trace d15a41554e67c0ec ]--- > [ 14.610500] RIP: 0010:f2fs_get_meta_page_nofail+0x41/0x50 > [ 14.610979] Code: 00 00 4c 89 e6 48 89 ef e8 1c f3 ff ff 48 3d 00 > f0 ff ff 76 17 48 83 f8 fb 75 05 83 eb 01 75 dd 31 f6 48 89 ef e8 bf > fe ff ff <0f> 0b 5b 5d 41 5c c3 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 > 31 d2 > [ 14.612632] RSP: 0018:ffffb95ec095fad8 EFLAGS: 00010296 > [ 14.613096] RAX: ffff9982b9d2d280 RBX: 0000000000000009 RCX: > 0000000000000000 > [ 14.613720] RDX: ffffffff00000001 RSI: 0000000000000007 RDI: > 0000000000000246 > [ 14.614347] RBP: ffff9982babe0000 R08: 00000004d0a24803 R09: > 0000000000000001 > [ 14.614974] R10: 0000000000000001 R11: 0000000000000000 R12: > 0000000001201aef > [ 14.615610] R13: ffff9982b9d14c00 R14: 00000000009008ef R15: > 0000000000000001 > [ 14.616240] FS: 0000000000000000(0000) GS:ffff9982bda00000(0063) > knlGS:00000000f7bdab00 > [ 14.616949] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 > [ 14.617457] CR2: 0000000056c95460 CR3: 00000000785ea006 CR4: > 0000000000360ef0 > Segmentation fault > root@kvm-xfstests:~# > > Best regards > Anatoly > _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel