Ye Bin 4a2c5b7994 f2fs: fix null-ptr-deref in f2fs_get_dnode_of_data ... There is issue as follows when test f2fs atomic write: F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop0): invalid crc_offset: 0 F2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=1, run fsck to fix. F2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix. ================================================================== BUG: KASAN: null-ptr-deref in f2fs_get_dnode_of_data+0xac/0x16d0 Read of size 8 at addr 0000000000000028 by task rep/1990 CPU: 4 PID: 1990 Comm: rep Not tainted 5.19.0-rc6-next-20220715 #266 Call Trace: <TASK> dump_stack_lvl+0x6e/0x91 print_report.cold+0x49a/0x6bb kasan_report+0xa8/0x130 f2fs_get_dnode_of_data+0xac/0x16d0 f2fs_do_write_data_page+0x2a5/0x1030 move_data_page+0x3c5/0xdf0 do_garbage_collect+0x2015/0x36c0 f2fs_gc+0x554/0x1d30 f2fs_balance_fs+0x7f5/0xda0 f2fs_write_single_data_page+0xb66/0xdc0 f2fs_write_cache_pages+0x716/0x1420 f2fs_write_data_pages+0x84f/0x9a0 do_writepages+0x130/0x3a0 filemap_fdatawrite_wbc+0x87/0xa0 file_write_and_wait_range+0x157/0x1c0 f2fs_do_sync_file+0x206/0x12d0 f2fs_sync_file+0x99/0xc0 vfs_fsync_range+0x75/0x140 f2fs_file_write_iter+0xd7b/0x1850 vfs_write+0x645/0x780 ksys_write+0xf1/0x1e0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd As 3db1de0e58 commit changed atomic write way which new a cow_inode for atomic write file, and also mark cow_inode as FI_ATOMIC_FILE. When f2fs_do_write_data_page write cow_inode will use cow_inode's cow_inode which is NULL. Then will trigger null-ptr-deref. To solve above issue, introduce FI_COW_FILE flag for COW inode. Fiexes: 3db1de0e582c("f2fs: change the current atomic write way") Signed-off-by: Ye Bin <yebin10@huawei.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>		2022-08-05 04:18:08 -07:00
..
acl.c	f2fs: support idmapped mounts	2022-02-12 06:20:46 -08:00
acl.h	vfs: add rcu argument to ->get_acl() callback	2021-08-18 22:08:24 +02:00
checkpoint.c	f2fs-for-5.19	2022-05-31 16:52:59 -07:00
compress.c	f2fs: initialize page_array_entry slab only if compression feature is on	2022-06-28 09:27:10 -07:00
data.c	f2fs: introduce sysfs atomic write statistics	2022-07-30 20:17:07 -07:00
debug.c	f2fs: adjust zone capacity when considering valid block count	2022-07-30 20:16:20 -07:00
dir.c	f2fs: don't use casefolded comparison for "." and ".."	2022-05-17 11:19:23 -07:00
extent_cache.c	f2fs: support fault injection for f2fs_kmem_cache_alloc()	2021-08-17 11:59:05 -07:00
f2fs.h	f2fs: fix null-ptr-deref in f2fs_get_dnode_of_data	2022-08-05 04:18:08 -07:00
file.c	f2fs: fix null-ptr-deref in f2fs_get_dnode_of_data	2022-08-05 04:18:08 -07:00
gc.c	f2fs: don't bother wait_ms by foreground gc	2022-07-30 20:17:07 -07:00
gc.h	f2fs: remove redundant code for gc condition	2022-07-30 20:16:20 -07:00
hash.c	f2fs: don't use casefolded comparison for "." and ".."	2022-05-17 11:19:23 -07:00
inline.c	f2fs: fix to do sanity check for inline inode	2022-05-18 15:36:11 -07:00
inode.c	f2fs: replace F2FS_I(inode) and sbi by the local variable	2022-05-27 13:58:23 -07:00
iostat.c	f2fs: fix iostat related lock protection	2022-06-19 15:16:12 -07:00
iostat.h	f2fs: introduce periodic iostat io latency traces	2021-08-23 10:25:51 -07:00
Kconfig	f2fs: introduce F2FS_UNFAIR_RWSEM to support unfair rwsem	2022-03-04 09:15:53 -08:00
Makefile	f2fs: separate out iostat feature	2021-08-23 10:25:51 -07:00
namei.c	f2fs: attach inline_data after setting compression	2022-06-19 15:16:10 -07:00
node.c	f2fs: fix to avoid use f2fs_bug_on() in f2fs_new_node_page()	2022-07-30 20:17:57 -07:00
node.h	f2fs: change the current atomic write way	2022-05-12 10:14:03 -07:00
recovery.c	f2fs-for-5.18	2022-03-22 10:00:31 -07:00
segment.c	f2fs: fix null-ptr-deref in f2fs_get_dnode_of_data	2022-08-05 04:18:08 -07:00
segment.h	f2fs: adjust zone capacity when considering valid block count	2022-07-30 20:16:20 -07:00
shrinker.c	f2fs: avoid race condition for shrinker count	2020-12-03 00:59:26 -08:00
super.c	f2fs: introduce sysfs atomic write statistics	2022-07-30 20:17:07 -07:00
sysfs.c	f2fs: introduce sysfs atomic write statistics	2022-07-30 20:17:07 -07:00
verity.c	f2fs-for-5.19	2022-05-31 16:52:59 -07:00
xattr.c	f2fs: move f2fs to use reader-unfair rwsems	2022-01-24 17:40:04 -08:00
xattr.h	f2fs: code cleanup by removing ifdef macro surrounding	2020-05-26 18:56:10 -07:00