Messages in this thread | | | Date | Mon, 12 Aug 2019 05:29:06 -0700 | Subject | divide error in read_super_block | From | syzbot <> |
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Hello,
syzbot found the following crash on:
HEAD commit: d45331b0 Linux 5.3-rc4 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17f9879a600000 kernel config: https://syzkaller.appspot.com/x/.config?x=3d7eaed8496da4da dashboard link: https://syzkaller.appspot.com/bug?extid=faba5b2419543cc95f0d compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+faba5b2419543cc95f0d@syzkaller.appspotmail.com
divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 21464 Comm: syz-executor.0 Not tainted 5.3.0-rc4 #73 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:read_super_block+0x57/0x7f0 fs/reiserfs/super.c:1611 Code: 89 d8 48 c1 e8 03 48 89 45 c0 42 80 3c 30 00 74 08 48 89 df e8 0a 29 c5 ff 48 89 5d c8 49 8b 5f 18 4c 89 65 b8 4c 89 e0 31 d2 <48> f7 f3 49 89 c6 4d 8d a7 28 01 00 00 4d 89 e5 49 c1 ed 03 48 b8 RSP: 0018:ffff88808e2dfa80 EFLAGS: 00010246 RAX: 0000000000002000 RBX: 0000000000000000 RCX: 0000000000040000 RDX: 0000000000000000 RSI: 0000000000003ab0 RDI: 0000000000003ab1 RBP: ffff88808e2dfad0 R08: ffffffff81e7119b R09: ffffed1011c5bf50 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000002000 R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff88807a5a0a80 FS: 00007f55a9f77700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000758080 CR3: 00000000a4e4a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: reiserfs_fill_super+0x7b0/0x30d0 fs/reiserfs/super.c:1966 mount_bdev+0x27c/0x390 fs/super.c:1283 get_super_block+0x34/0x40 fs/reiserfs/super.c:2599 legacy_get_tree+0xf9/0x1a0 fs/fs_context.c:661 vfs_get_tree+0x8f/0x380 fs/super.c:1413 do_new_mount fs/namespace.c:2791 [inline] do_mount+0x169d/0x2490 fs/namespace.c:3111 ksys_mount+0xcc/0x100 fs/namespace.c:3320 __do_sys_mount fs/namespace.c:3334 [inline] __se_sys_mount fs/namespace.c:3331 [inline] __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3331 do_syscall_64+0xfe/0x140 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f55a9f76c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459829 RDX: 0000000020000080 RSI: 0000000020000100 RDI: 0000000020000040 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f55a9f776d4 R13: 00000000004c5e57 R14: 00000000004da858 R15: 00000000ffffffff Modules linked in: ---[ end trace b618cfac8e6036db ]--- RIP: 0010:read_super_block+0x57/0x7f0 fs/reiserfs/super.c:1611 Code: 89 d8 48 c1 e8 03 48 89 45 c0 42 80 3c 30 00 74 08 48 89 df e8 0a 29 c5 ff 48 89 5d c8 49 8b 5f 18 4c 89 65 b8 4c 89 e0 31 d2 <48> f7 f3 49 89 c6 4d 8d a7 28 01 00 00 4d 89 e5 49 c1 ed 03 48 b8 RSP: 0018:ffff88808e2dfa80 EFLAGS: 00010246 RAX: 0000000000002000 RBX: 0000000000000000 RCX: 0000000000040000 RDX: 0000000000000000 RSI: 0000000000003ab0 RDI: 0000000000003ab1 RBP: ffff88808e2dfad0 R08: ffffffff81e7119b R09: ffffed1011c5bf50 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000002000 R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff88807a5a0a80 FS: 00007f55a9f77700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcdcc16f3c CR3: 00000000a4e4a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
--- This bug 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@googlegroups.com.
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