Jaegeuk Kim b2ca374f33 f2fs: sanity check on sit entry ... syzbot hit the following crash on upstream commit 87ef12027b (Wed Apr 18 19:48:17 2018 +0000) Merge tag 'ceph-for-4.17-rc2' of git://github.com/ceph/ceph-client syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=83699adeb2d13579c31e C reproducer: https://syzkaller.appspot.com/x/repro.c?id=5805208181407744 syzkaller reproducer: https://syzkaller.appspot.com/x/repro.syz?id=6005073343676416 Raw console output: https://syzkaller.appspot.com/x/log.txt?id=6555047731134464 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+83699adeb2d13579c31e@syzkaller.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 BUG: unable to handle kernel paging request at ffffed006b2a50c0 PGD 21ffee067 P4D 21ffee067 PUD 21fbeb067 PMD 0 Oops: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 4514 Comm: syzkaller989480 Not tainted 4.17.0-rc1+ #8 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:build_sit_entries fs/f2fs/segment.c:3653 [inline] RIP: 0010:build_segment_manager+0x7ef7/0xbf70 fs/f2fs/segment.c:3852 RSP: 0018:ffff8801b102e5b0 EFLAGS: 00010a06 RAX: 1ffff1006b2a50c0 RBX: 0000000000000004 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801ac74243e RBP: ffff8801b102f410 R08: ffff8801acbd46c0 R09: fffffbfff14d9af8 R10: fffffbfff14d9af8 R11: ffff8801acbd46c0 R12: ffff8801ac742a80 R13: ffff8801d9519100 R14: dffffc0000000000 R15: ffff880359528600 FS: 0000000001e04880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed006b2a50c0 CR3: 00000001ac6ac000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: f2fs_fill_super+0x4095/0x7bf0 fs/f2fs/super.c:2803 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: 0033:0x443d6a RSP: 002b:00007ffd312813c8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000c00 RCX: 0000000000443d6a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd312813d0 RBP: 0000000000000003 R08: 0000000020016a00 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000004 R13: 0000000000402c60 R14: 0000000000000000 R15: 0000000000000000 RIP: build_sit_entries fs/f2fs/segment.c:3653 [inline] RSP: ffff8801b102e5b0 RIP: build_segment_manager+0x7ef7/0xbf70 fs/f2fs/segment.c:3852 RSP: ffff8801b102e5b0 CR2: ffffed006b2a50c0 ---[ end trace a2034989e196ff17 ]--- Reported-and-tested-by: syzbot+83699adeb2d13579c31e@syzkaller.appspotmail.com Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>		2018-05-31 11:31:48 -07:00
..
acl.c	posix_acl: convert posix_acl.a_refcount from atomic_t to refcount_t	2018-01-02 19:27:28 -08:00
acl.h	f2fs: remove dead code f2fs_check_acl	2016-09-14 16:52:36 -07:00
checkpoint.c	f2fs: remove duplicated dquot_initialize and fix error handling	2018-05-31 11:31:47 -07:00
data.c	f2fs: avoid fsync() failure caused by EAGAIN in writepage()	2018-05-04 10:51:22 -07:00
debug.c	f2fs: inject fault to kzalloc	2018-01-02 19:27:29 -08:00
dir.c	page cache: use xa_lock	2018-04-11 10:28:39 -07:00
extent_cache.c	f2fs: remove redundant initialization of pointer 'p'	2018-03-13 08:05:45 +09:00
f2fs.h	f2fs: give message and set need_fsck given broken node id	2018-05-31 11:31:48 -07:00
file.c	f2fs: fix to detect failure of dquot_initialize	2018-05-31 11:31:47 -07:00
gc.c	f2fs: clear PageError on writepage	2018-05-02 14:30:58 -07:00
gc.h	f2fs: add an ioctl to disable GC for specific file	2018-01-22 14:56:35 -08:00
hash.c	f2fs: check entire encrypted bigname when finding a dentry	2017-05-04 11:44:35 -04:00
inline.c	f2fs: remove unmatched zero_user_segment when convert inline dentry	2018-05-31 11:31:44 -07:00
inode.c	f2fs: avoid bug_on on corrupted inode	2018-05-31 11:31:48 -07:00
Kconfig	fs/*/Kconfig: drop links to 404-compliant http://acl.bestbits.at	2018-01-01 12:45:37 -07:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
namei.c	f2fs: introduce private inode status mapping	2018-05-31 11:31:44 -07:00
node.c	f2fs: give message and set need_fsck given broken node id	2018-05-31 11:31:48 -07:00
node.h	f2fs: don't track new nat entry in nat set	2018-03-27 20:10:29 -07:00
recovery.c	f2fs: do not check F2FS_INLINE_DOTS in recover	2018-05-31 11:31:47 -07:00
segment.c	f2fs: sanity check on sit entry	2018-05-31 11:31:48 -07:00
segment.h	f2fs: don't use GFP_ZERO for page caches	2018-05-31 11:31:45 -07:00
shrinker.c	f2fs: obsolete ALLOC_NID_LIST list	2017-10-10 12:49:53 -07:00
super.c	f2fs: introduce private inode status mapping	2018-05-31 11:31:44 -07:00
sysfs.c	f2fs: don't split checkpoint in fstrim	2018-05-30 08:58:59 -07:00
trace.c	f2fs: fix potential hangtask in f2fs_trace_pid	2018-01-02 19:27:30 -08:00
trace.h	f2fs: add sbi and page pointer in f2fs_io_info	2015-05-28 15:41:32 -07:00
xattr.c	f2fs: correct removexattr behavior for null valued extended attribute	2018-01-22 14:56:57 -08:00
xattr.h	f2fs: guard macro variables with braces	2017-04-10 19:48:10 -07:00