Hello, syzbot found the following issue on: HEAD commit: d1d2220c Add linux-next specific files for 20200924 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=166cb7d9900000 kernel config: https://syzkaller.appspot.com/x/.config?x=254e028a642027c dashboard link: https://syzkaller.appspot.com/bug?extid=8afc256dce324523609d compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=127762c3900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=124ccf3b900000 The issue was bisected to: commit 382329a9d8553a98418a6f6e3425f0c288837897 Author: Gao Xiang <gaoxiang25@xxxxxxxxxx> Date: Wed Aug 14 10:37:04 2019 +0000 staging: erofs: differentiate unsupported on-disk format bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=149889e3900000 final oops: https://syzkaller.appspot.com/x/report.txt?x=169889e3900000 console output: https://syzkaller.appspot.com/x/log.txt?x=129889e3900000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8afc256dce324523609d@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 382329a9d855 ("staging: erofs: differentiate unsupported on-disk format") erofs: (device loop0): erofs_read_inode: bogus i_mode (0) @ nid 36 ------------[ cut here ]------------ kernel BUG at fs/erofs/inode.c:182! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 6895 Comm: syz-executor894 Not tainted 5.9.0-rc6-next-20200924-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:erofs_read_inode fs/erofs/inode.c:182 [inline] RIP: 0010:erofs_fill_inode fs/erofs/inode.c:235 [inline] RIP: 0010:erofs_iget+0xfd8/0x2390 fs/erofs/inode.c:322 Code: 00 0f 85 aa 10 00 00 49 8b 7c 24 28 49 89 d8 44 89 e9 48 c7 c2 a0 9c ef 88 48 c7 c6 40 9f ef 88 e8 b5 df b0 04 e8 88 5a 07 fe <0f> 0b e8 81 5a 07 fe 4c 89 e7 4c 63 e3 e8 b6 61 5b fe e9 ed f0 ff RSP: 0018:ffffc90001017c10 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000024 RCX: 0000000000000000 RDX: ffff8880a172e480 RSI: ffffffff836dd6e8 RDI: fffff52000202f72 RBP: ffff8880a8ca4480 R08: 0000000000000042 R09: ffff8880ae5319a7 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880854fd9b8 R13: 0000000000000000 R14: ffffea0002a32900 R15: 0000000000000000 FS: 000000000108e880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000043eb80 CR3: 00000000a7edb000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: erofs_fc_fill_super+0xaa3/0x1010 fs/erofs/super.c:382 get_tree_bdev+0x421/0x740 fs/super.c:1342 vfs_get_tree+0x89/0x2f0 fs/super.c:1547 do_new_mount fs/namespace.c:2896 [inline] path_mount+0x12ae/0x1e70 fs/namespace.c:3227 __do_sys_mount fs/namespace.c:3438 [inline] __se_sys_mount fs/namespace.c:3411 [inline] __x64_sys_mount+0x278/0x2f0 fs/namespace.c:3411 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x446d6a Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007fffa8ef9ef8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fffa8ef9f50 RCX: 0000000000446d6a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fffa8ef9f10 RBP: 00007fffa8ef9f10 R08: 00007fffa8ef9f50 R09: 00007fff00000015 R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000001 R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 Modules linked in: ---[ end trace 66a5371a9bd8a3b2 ]--- RIP: 0010:erofs_read_inode fs/erofs/inode.c:182 [inline] RIP: 0010:erofs_fill_inode fs/erofs/inode.c:235 [inline] RIP: 0010:erofs_iget+0xfd8/0x2390 fs/erofs/inode.c:322 Code: 00 0f 85 aa 10 00 00 49 8b 7c 24 28 49 89 d8 44 89 e9 48 c7 c2 a0 9c ef 88 48 c7 c6 40 9f ef 88 e8 b5 df b0 04 e8 88 5a 07 fe <0f> 0b e8 81 5a 07 fe 4c 89 e7 4c 63 e3 e8 b6 61 5b fe e9 ed f0 ff RSP: 0018:ffffc90001017c10 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000024 RCX: 0000000000000000 RDX: ffff8880a172e480 RSI: ffffffff836dd6e8 RDI: fffff52000202f72 RBP: ffff8880a8ca4480 R08: 0000000000000042 R09: ffff8880ae5319a7 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880854fd9b8 R13: 0000000000000000 R14: ffffea0002a32900 R15: 0000000000000000 FS: 000000000108e880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000043eb80 CR3: 00000000a7edb000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
