From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 203213] New: kernel BUG at fs/f2fs/f2fs.h:2012 and
hangs
Date: Tue, 09 Apr 2019 20:27:36 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=203213
Bug ID: 203213
Summary: kernel BUG at fs/f2fs/f2fs.h:2012 and hangs
Product: File System
Version: 2.5
Kernel Version: 5.0.0
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: f2fs
Assignee: filesystem_f2fs@kernel-bugs.kernel.org
Reporter: jungyeon@gatech.edu
Regression: No
Created attachment 282205
--> https://bugzilla.kernel.org/attachment.cgi?id=282205&action=edit
The (compressed) crafted image which causes crash
- Overview
When mounting the attached crafted image and running program, I got this error.
Additionally, it hangs on sync after running the this script.
The image is intentionally fuzzed from a normal f2fs image for testing and I
enabled option CONFIG_F2FS_CHECK_FS on.
- Reproduces
mkdir test
mount -t f2fs tmp.img test
cp a.out test
cd test
sudo ./a.out
sync
- Messages
[ 69.816604] kernel BUG at fs/f2fs/f2fs.h:2012!
[ 69.817282] invalid opcode: 0000 [#1] SMP PTI
[ 69.817882] CPU: 0 PID: 1896 Comm: a.out Not tainted 5.0.0 #4
[ 69.818633] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 69.819904] RIP: 0010:truncate_node+0x2c9/0x2e0
[ 69.820503] Code: ff ff ff ff e8 68 27 0b 00 48 8b 7d 00 e8 df a3 fe ff e9
b7 fe ff ff 0f 0b 0f 0b 49 83 bc 24 90 00 00 00 00 0f 85 e1 fd ff ff <0f> 0b 0f
0b e8 fe 0c d3 ff 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00
[ 69.822970] RSP: 0018:ffff90e380d4fcd0 EFLAGS: 00010246
[ 69.823683] RAX: 000000000000000f RBX: ffff8bc7361c6800 RCX:
0000000000000001
[ 69.824601] RDX: 000000000000000b RSI: 0000000000000000 RDI:
ffff8bc7361c6de8
[ 69.825528] RBP: ffff90e380d4fd18 R08: ffff8bc7363f5a01 R09:
ffff8bc7363f5d00
[ 69.826454] R10: 0000000000000018 R11: ffff8bc72bb87228 R12:
ffff8bc72ebd2200
[ 69.827421] R13: 000000000000000a R14: 0000000000000004 R15:
00007ffcb720f630
[ 69.828355] FS: 00007f5877c00700(0000) GS:ffff8bc737a00000(0000)
knlGS:0000000000000000
[ 69.829406] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 69.830164] CR2: 00007f587771b4c0 CR3: 000000023518a002 CR4:
00000000001606f0
[ 69.831137] Call Trace:
[ 69.831488] f2fs_truncate_xattr_node+0xa1/0x130
[ 69.832117] f2fs_remove_inode_page+0x82/0x2d0
[ 69.832705] f2fs_evict_inode+0x2a3/0x3a0
[ 69.833241] evict+0xba/0x180
[ 69.833641] __dentry_kill+0xbe/0x160
[ 69.834126] dentry_kill+0x46/0x180
[ 69.834590] dput+0xbb/0x100
[ 69.834994] do_renameat2+0x3c9/0x550
[ 69.835504] __x64_sys_rename+0x17/0x20
[ 69.836015] do_syscall_64+0x43/0xf0
[ 69.836493] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 69.837159] RIP: 0033:0x7f587771b4d9
[ 69.837632] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89
f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01
f0 ff ff 73 01 c3 48 8b 0d 8f 29 2c 00 f7 d8 64 89 01 48
[ 69.840157] RSP: 002b:00007ffcb720f578 EFLAGS: 00000217 ORIG_RAX:
0000000000000052
[ 69.841140] RAX: ffffffffffffffda RBX: 0000000000000000 RCX:
00007f587771b4d9
[ 69.842068] RDX: 00007f587771b4d9 RSI: 00007ffcb720f640 RDI:
00007ffcb720f630
[ 69.843029] RBP: 00007ffcb72136b0 R08: 00007ffcb7213798 R09:
00007ffcb7213798
[ 69.843975] R10: 00007ffcb7213798 R11: 0000000000000217 R12:
00000000004004e0
[ 69.844905] R13: 00007ffcb7213790 R14: 0000000000000000 R15:
0000000000000000
[ 69.845833] Modules linked in:
[ 69.846271] ---[ end trace ce77f978d191a0d8 ]---
[ 69.846884] RIP: 0010:truncate_node+0x2c9/0x2e0
[ 69.847496] Code: ff ff ff ff e8 68 27 0b 00 48 8b 7d 00 e8 df a3 fe ff e9
b7 fe ff ff 0f 0b 0f 0b 49 83 bc 24 90 00 00 00 00 0f 85 e1 fd ff ff <0f> 0b 0f
0b e8 fe 0c d3 ff 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00
[ 69.849951] RSP: 0018:ffff90e380d4fcd0 EFLAGS: 00010246
[ 69.850647] RAX: 000000000000000f RBX: ffff8bc7361c6800 RCX:
0000000000000001
[ 69.851626] RDX: 000000000000000b RSI: 0000000000000000 RDI:
ffff8bc7361c6de8
[ 69.852569] RBP: ffff90e380d4fd18 R08: ffff8bc7363f5a01 R09:
ffff8bc7363f5d00
[ 69.853523] R10: 0000000000000018 R11: ffff8bc72bb87228 R12:
ffff8bc72ebd2200
[ 69.854485] R13: 000000000000000a R14: 0000000000000004 R15:
00007ffcb720f630
[ 69.855484] FS: 00007f5877c00700(0000) GS:ffff8bc737a00000(0000)
knlGS:0000000000000000
[ 69.856572] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 69.857337] CR2: 00007f587771b4c0 CR3: 000000023518a002 CR4:
00000000001606f0
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