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Message-ID: <000000000000aa1e22056a5661df@google.com> Date: Sat, 21 Apr 2018 00:02:01 -0700 From: syzbot <syzbot+41a1b341571f0952badb@...kaller.appspotmail.com> To: jaegeuk@...nel.org, linux-f2fs-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, yuchao0@...wei.com Subject: kernel BUG at fs/f2fs/inode.c:LINE! Hello, syzbot hit the following crash on upstream commit 43f70c960180c11d64ee3e9e53075fe1acd43ff1 (Fri Apr 20 16:08:37 2018 +0000) Merge tag 'ecryptfs-4.17-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=41a1b341571f0952badb C reproducer: https://syzkaller.appspot.com/x/repro.c?id=4580931511779328 syzkaller reproducer: https://syzkaller.appspot.com/x/repro.syz?id=5022282351116288 Raw console output: https://syzkaller.appspot.com/x/log.txt?id=6030092669026304 Kernel config: https://syzkaller.appspot.com/x/.config?id=1808800213120130118 compiler: gcc (GCC) 8.0.1 20180413 (experimental) IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+41a1b341571f0952badb@...kaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop0): invalid crc value ------------[ cut here ]------------ kernel BUG at fs/f2fs/inode.c:242! invalid opcode: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 4543 Comm: syzkaller153755 Not tainted 4.17.0-rc1+ #9 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:do_read_inode fs/f2fs/inode.c:242 [inline] RIP: 0010:f2fs_iget+0x3440/0x3d10 fs/f2fs/inode.c:317 RSP: 0018:ffff8801d90370e8 EFLAGS: 00010293 RAX: ffff8801d906c400 RBX: ffff8801b6ec10c0 RCX: ffffffff82eaccd4 RDX: 0000000000000000 RSI: ffffffff82eaee50 RDI: 0000000000000007 RBP: ffff8801d9037410 R08: ffff8801d906c400 R09: ffffed003b2fbab6 R10: ffffed003b2fbab6 R11: ffff8801d97dd5b7 R12: ffff8801ad3c8000 R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000001393880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fafd7c0c000 CR3: 00000001d9b5a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: f2fs_fill_super+0x4377/0x7bf0 fs/f2fs/super.c:2842 mount_bdev+0x30c/0x3e0 fs/super.c:1165 f2fs_mount+0x34/0x40 fs/f2fs/super.c:3020 mount_fs+0xae/0x328 fs/super.c:1268 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:1027 [inline] do_new_mount fs/namespace.c:2517 [inline] do_mount+0x564/0x3070 fs/namespace.c:2847 ksys_mount+0x12d/0x140 fs/namespace.c:3063 __do_sys_mount fs/namespace.c:3077 [inline] __se_sys_mount fs/namespace.c:3074 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3074 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x443cfa RSP: 002b:00007ffca5ac3f88 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000b70 RCX: 0000000000443cfa RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffca5ac3f90 RBP: 0000000000000003 R08: 0000000020016a00 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000004 R13: 0000000000402bf0 R14: 0000000000000000 R15: 0000000000000000 Code: 8e fe 48 c7 c2 e0 08 f2 87 be 1c 01 00 00 48 c7 c7 40 09 f2 87 c6 05 88 e7 8b 06 01 e8 3b 4a 72 fe e9 51 ef ff ff e8 d0 41 8e fe <0f> 0b e8 c9 41 8e fe e8 64 b7 78 fe 31 ff 89 c3 89 c6 e8 c9 42 RIP: do_read_inode fs/f2fs/inode.c:242 [inline] RSP: ffff8801d90370e8 RIP: f2fs_iget+0x3440/0x3d10 fs/f2fs/inode.c:317 RSP: ffff8801d90370e8 ---[ end trace 8004fd56969de769 ]--- --- This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkaller@...glegroups.com. syzbot will keep track of this bug report. If you forgot to add the Reported-by tag, once the fix for this bug is merged into any tree, please reply to this email with: #syz fix: exact-commit-title If you want to test a patch for this bug, please reply with: #syz test: git://repo/address.git branch and provide the patch inline or as an attachment. To mark this as a duplicate of another syzbot report, please reply with: #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, please reply with: #syz invalid Note: if the crash happens again, it will cause creation of a new bug report. Note: all commands must start from beginning of the line in the email body.
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