Chao Yu 73545817c9 f2fs: fix null pointer dereference when issuing flush in ->fsync ... We only allocate flush merge control structure sbi::sm_info::fcc_info when flush_merge option is on, but in f2fs_issue_flush we still try to access member of the control structure without that option, it incurs panic as show below, fix it. Call Trace: __remove_ino_entry+0xa9/0xc0 [f2fs] f2fs_do_sync_file.isra.27+0x214/0x6d0 [f2fs] f2fs_sync_file+0x18/0x20 [f2fs] vfs_fsync_range+0x3d/0xb0 __do_page_fault+0x261/0x4d0 do_fsync+0x3d/0x70 SyS_fsync+0x10/0x20 do_syscall_64+0x6e/0x180 entry_SYSCALL64_slow_path+0x25/0x25 RIP: 0033:0x7f18ce260de0 RSP: 002b:00007ffdd4589258 EFLAGS: 00000246 ORIG_RAX: 000000000000004a RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f18ce260de0 RDX: 0000000000000006 RSI: 00000000016c0360 RDI: 0000000000000003 RBP: 00000000016c0360 R08: 000000000000ffff R09: 000000000000001f R10: 00007ffdd4589020 R11: 0000000000000246 R12: 00000000016c0100 R13: 0000000000000000 R14: 00000000016c1f00 R15: 00000000016c0100 Code: fb 81 e3 00 08 00 00 48 89 45 a0 0f 1f 44 00 00 31 c0 85 db 75 27 41 81 e7 00 04 00 00 74 0c 41 8b 45 20 85 c0 0f 85 81 00 00 00 <f0> 41 ff 45 20 4c 89 e7 e8 f8 e9 ff ff f0 41 ff 4d 20 48 83 c4 RIP: f2fs_issue_flush+0x5b/0x170 [f2fs] RSP: ffffc90003b5fd78 CR2: 0000000000000020 ---[ end trace a09314c24f037648 ]--- Reported-by: Shuoran Liu <liushuoran@huawei.com> Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>		2017-02-22 20:24:52 -08:00
..
acl.c	f2fs: keep dirty inodes selectively for checkpoint	2016-11-23 12:11:08 -08:00
acl.h	f2fs: remove dead code f2fs_check_acl	2016-09-14 16:52:36 -07:00
checkpoint.c	f2fs: clean up with list_{first, last}_entry	2017-02-22 18:48:47 -08:00
data.c	f2fs: fix a dead loop in f2fs_fiemap()	2017-02-22 20:24:49 -08:00
debug.c	f2fs: show # of on-going flush and discard bios	2017-02-22 20:24:47 -08:00
dir.c	f2fs: report error of f2fs_fill_dentries	2016-11-23 12:11:12 -08:00
extent_cache.c	f2fs: use rb_entry_safe	2017-01-29 12:46:01 +09:00
f2fs.h	f2fs: do not preallocate blocks which has wrong buffer	2017-02-22 20:24:48 -08:00
file.c	f2fs: do not preallocate blocks which has wrong buffer	2017-02-22 20:24:48 -08:00
gc.c	f2fs: introduce FI_ATOMIC_COMMIT	2017-02-22 18:48:48 -08:00
gc.h	f2fs: detect idle time depending on user behavior	2016-01-11 15:56:37 -08:00
hash.c	f2fs: introduce dot and dotdot name check	2015-05-28 15:41:34 -07:00
inline.c	for-f2fs-4.10	2016-12-14 09:07:36 -08:00
inode.c	f2fs: record inode updating status correctly	2016-11-23 12:11:25 -08:00
Kconfig	f2fs: add mount option to select fault injection ratio	2016-05-07 10:32:22 -07:00
Makefile	fs crypto: move per-file encryption from f2fs tree to fs/crypto	2016-03-17 21:19:33 -07:00
namei.c	f2fs: don't allow encrypted operations without keys	2017-01-29 12:46:01 +09:00
node.c	f2fs: check in-memory nat version bitmap	2017-02-22 18:48:49 -08:00
node.h	f2fs: check in-memory nat version bitmap	2017-02-22 18:48:49 -08:00
recovery.c	f2fs: fix to avoid overflow when left shifting page offset	2017-02-22 20:24:51 -08:00
segment.c	f2fs: fix null pointer dereference when issuing flush in ->fsync	2017-02-22 20:24:52 -08:00
segment.h	f2fs: check in-memory sit version bitmap	2017-02-22 18:48:50 -08:00
shrinker.c	f2fs: avoid casted negative value as shrink count	2016-11-23 12:11:03 -08:00
super.c	f2fs: factor out discard command info into discard_cmd_control	2017-02-22 18:48:53 -08:00
trace.c	f2fs: use bio op accessors	2016-06-07 13:41:38 -06:00
trace.h	f2fs: add sbi and page pointer in f2fs_io_info	2015-05-28 15:41:32 -07:00
xattr.c	f2fs: enhance lookup xattr	2017-02-22 20:24:51 -08:00
xattr.h	f2fs: enhance lookup xattr	2017-02-22 20:24:51 -08:00