Bug 203213
Summary: | kernel BUG at fs/f2fs/f2fs.h:2012 and hangs | ||
---|---|---|---|
Product: | File System | Reporter: | Jungyeon (jungyeon) |
Component: | f2fs | Assignee: | Default virtual assignee for f2fs (filesystem_f2fs) |
Status: | RESOLVED CODE_FIX | ||
Severity: | normal | ||
Priority: | P1 | ||
Hardware: | All | ||
OS: | Linux | ||
Kernel Version: | 5.0.0 | Subsystem: | |
Regression: | No | Bisected commit-id: | |
Attachments: |
The (compressed) crafted image which causes crash
poc_03.c |
Created attachment 282207 [details]
poc_03.c
I missed the program.
Please compile this before starting to reproduce, like below.
- Reproduces
cc poc_03.c
mkdir test
mount -t f2fs tmp.img test
cp a.out test
cd test
sudo ./a.out
sync
|
Created attachment 282205 [details] 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