Messages in this thread | | | Date | Sat, 23 Oct 2021 19:25:20 -0700 | Subject | [syzbot] WARNING in z_erofs_lz4_decompress | From | syzbot <> |
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Hello,
syzbot found the following issue on:
HEAD commit: 60e8840126bd Add linux-next specific files for 20211018 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=125932af300000 kernel config: https://syzkaller.appspot.com/x/.config?x=4bd44cafcda7632e dashboard link: https://syzkaller.appspot.com/bug?extid=d8aaffc3719597e8cfb4 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d8aaffc3719597e8cfb4@syzkaller.appspotmail.com
erofs: (device loop4): z_erofs_lz4_decompress_mem: failed to decompress -4100 in[4096, 0] out[9000] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 9895 at fs/erofs/decompressor.c:230 z_erofs_lz4_decompress_mem fs/erofs/decompressor.c:227 [inline] WARNING: CPU: 1 PID: 9895 at fs/erofs/decompressor.c:230 z_erofs_lz4_decompress+0x841/0x1400 fs/erofs/decompressor.c:289 Modules linked in: CPU: 1 PID: 9895 Comm: kworker/u5:3 Not tainted 5.15.0-rc5-next-20211018-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: erofs_unzipd z_erofs_decompressqueue_work RIP: 0010:z_erofs_lz4_decompress_mem fs/erofs/decompressor.c:230 [inline] RIP: 0010:z_erofs_lz4_decompress+0x841/0x1400 fs/erofs/decompressor.c:289 Code: e9 03 80 3c 11 00 0f 85 8c 0a 00 00 41 56 48 8b 7d 00 45 89 e9 89 d9 48 c7 c2 20 eb fb 89 48 c7 c6 40 ed fb 89 e8 ee 5d 85 05 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 08 5f 48 89 ca 48 RSP: 0018:ffffc90001b3f718 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffffffffffeffc RCX: 0000000000000000 RDX: ffff8880795b3a00 RSI: ffffffff815ef308 RDI: fffff52000367ed3 RBP: ffffc90001b3f858 R08: 0000000000000063 R09: 0000000000000000 R10: ffffffff815e90de R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000002328 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ef25000 CR3: 000000002b3f7000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> z_erofs_decompress_pcluster.isra.0+0x1389/0x2450 fs/erofs/zdata.c:977 z_erofs_decompress_queue fs/erofs/zdata.c:1055 [inline] z_erofs_decompressqueue_work+0xe0/0x170 fs/erofs/zdata.c:1066 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK>
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