* [f2fs-dev] [PATCH AUTOSEL 4.19 04/60] f2fs: add trace exit in exception path
[not found] <20201027000415.1026364-1-sashal@kernel.org>
@ 2020-10-27 0:03 ` Sasha Levin
2020-10-27 0:03 ` [f2fs-dev] [PATCH AUTOSEL 4.19 05/60] f2fs: fix uninit-value in f2fs_lookup Sasha Levin
2020-10-27 0:03 ` [f2fs-dev] [PATCH AUTOSEL 4.19 06/60] f2fs: fix to check segment boundary during SIT page readahead Sasha Levin
2 siblings, 0 replies; 3+ messages in thread
From: Sasha Levin @ 2020-10-27 0:03 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, Jaegeuk Kim, Zhang Qilong, linux-f2fs-devel
From: Zhang Qilong <zhangqilong3@huawei.com>
[ Upstream commit 9b66482282888d02832b7d90239e1cdb18e4b431 ]
Missing the trace exit in f2fs_sync_dirty_inodes
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/f2fs/checkpoint.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 388500eec7291..d412fc150988c 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -1003,8 +1003,12 @@ int f2fs_sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
get_pages(sbi, is_dir ?
F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
retry:
- if (unlikely(f2fs_cp_error(sbi)))
+ if (unlikely(f2fs_cp_error(sbi))) {
+ trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
+ get_pages(sbi, is_dir ?
+ F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
return -EIO;
+ }
spin_lock(&sbi->inode_lock[type]);
--
2.25.1
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^ permalink raw reply related [flat|nested] 3+ messages in thread* [f2fs-dev] [PATCH AUTOSEL 4.19 05/60] f2fs: fix uninit-value in f2fs_lookup
[not found] <20201027000415.1026364-1-sashal@kernel.org>
2020-10-27 0:03 ` [f2fs-dev] [PATCH AUTOSEL 4.19 04/60] f2fs: add trace exit in exception path Sasha Levin
@ 2020-10-27 0:03 ` Sasha Levin
2020-10-27 0:03 ` [f2fs-dev] [PATCH AUTOSEL 4.19 06/60] f2fs: fix to check segment boundary during SIT page readahead Sasha Levin
2 siblings, 0 replies; 3+ messages in thread
From: Sasha Levin @ 2020-10-27 0:03 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, syzbot+0eac6f0bbd558fd866d7, linux-f2fs-devel,
Jaegeuk Kim
From: Chao Yu <yuchao0@huawei.com>
[ Upstream commit 6d7ab88a98c1b7a47c228f8ffb4f44d631eaf284 ]
As syzbot reported:
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x21c/0x280 lib/dump_stack.c:118
kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:122
__msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:219
f2fs_lookup+0xe05/0x1a80 fs/f2fs/namei.c:503
lookup_open fs/namei.c:3082 [inline]
open_last_lookups fs/namei.c:3177 [inline]
path_openat+0x2729/0x6a90 fs/namei.c:3365
do_filp_open+0x2b8/0x710 fs/namei.c:3395
do_sys_openat2+0xa88/0x1140 fs/open.c:1168
do_sys_open fs/open.c:1184 [inline]
__do_compat_sys_openat fs/open.c:1242 [inline]
__se_compat_sys_openat+0x2a4/0x310 fs/open.c:1240
__ia32_compat_sys_openat+0x56/0x70 fs/open.c:1240
do_syscall_32_irqs_on arch/x86/entry/common.c:80 [inline]
__do_fast_syscall_32+0x129/0x180 arch/x86/entry/common.c:139
do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:162
do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:205
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
In f2fs_lookup(), @res_page could be used before being initialized,
because in __f2fs_find_entry(), once F2FS_I(dir)->i_current_depth was
been fuzzed to zero, then @res_page will never be initialized, causing
this kmsan warning, relocating @res_page initialization place to fix
this bug.
Reported-by: syzbot+0eac6f0bbd558fd866d7@syzkaller.appspotmail.com
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/f2fs/dir.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index ebe19894884be..2cd85ce3e4502 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -208,16 +208,15 @@ struct f2fs_dir_entry *__f2fs_find_entry(struct inode *dir,
unsigned int max_depth;
unsigned int level;
+ *res_page = NULL;
+
if (f2fs_has_inline_dentry(dir)) {
- *res_page = NULL;
de = f2fs_find_in_inline_dir(dir, fname, res_page);
goto out;
}
- if (npages == 0) {
- *res_page = NULL;
+ if (npages == 0)
goto out;
- }
max_depth = F2FS_I(dir)->i_current_depth;
if (unlikely(max_depth > MAX_DIR_HASH_DEPTH)) {
@@ -229,7 +228,6 @@ struct f2fs_dir_entry *__f2fs_find_entry(struct inode *dir,
}
for (level = 0; level < max_depth; level++) {
- *res_page = NULL;
de = find_in_level(dir, level, fname, res_page);
if (de || IS_ERR(*res_page))
break;
--
2.25.1
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^ permalink raw reply related [flat|nested] 3+ messages in thread* [f2fs-dev] [PATCH AUTOSEL 4.19 06/60] f2fs: fix to check segment boundary during SIT page readahead
[not found] <20201027000415.1026364-1-sashal@kernel.org>
2020-10-27 0:03 ` [f2fs-dev] [PATCH AUTOSEL 4.19 04/60] f2fs: add trace exit in exception path Sasha Levin
2020-10-27 0:03 ` [f2fs-dev] [PATCH AUTOSEL 4.19 05/60] f2fs: fix uninit-value in f2fs_lookup Sasha Levin
@ 2020-10-27 0:03 ` Sasha Levin
2 siblings, 0 replies; 3+ messages in thread
From: Sasha Levin @ 2020-10-27 0:03 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, Jaegeuk Kim, syzbot+3698081bcf0bb2d12174,
linux-f2fs-devel
From: Chao Yu <yuchao0@huawei.com>
[ Upstream commit 6a257471fa42c8c9c04a875cd3a2a22db148e0f0 ]
As syzbot reported:
kernel BUG at fs/f2fs/segment.h:657!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 16220 Comm: syz-executor.0 Not tainted 5.9.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:f2fs_ra_meta_pages+0xa51/0xdc0 fs/f2fs/segment.h:657
Call Trace:
build_sit_entries fs/f2fs/segment.c:4195 [inline]
f2fs_build_segment_manager+0x4b8a/0xa3c0 fs/f2fs/segment.c:4779
f2fs_fill_super+0x377d/0x6b80 fs/f2fs/super.c:3633
mount_bdev+0x32e/0x3f0 fs/super.c:1417
legacy_get_tree+0x105/0x220 fs/fs_context.c:592
vfs_get_tree+0x89/0x2f0 fs/super.c:1547
do_new_mount fs/namespace.c:2875 [inline]
path_mount+0x1387/0x2070 fs/namespace.c:3192
do_mount fs/namespace.c:3205 [inline]
__do_sys_mount fs/namespace.c:3413 [inline]
__se_sys_mount fs/namespace.c:3390 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3390
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
@blkno in f2fs_ra_meta_pages could exceed max segment count, causing panic
in following sanity check in current_sit_addr(), add check condition to
avoid this issue.
Reported-by: syzbot+3698081bcf0bb2d12174@syzkaller.appspotmail.com
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/f2fs/checkpoint.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index d412fc150988c..a563de5ccd217 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -218,6 +218,8 @@ int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
blkno * NAT_ENTRY_PER_BLOCK);
break;
case META_SIT:
+ if (unlikely(blkno >= TOTAL_SEGS(sbi)))
+ goto out;
/* get sit block addr */
fio.new_blkaddr = current_sit_addr(sbi,
blkno * SIT_ENTRY_PER_BLOCK);
--
2.25.1
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Linux-f2fs-devel@lists.sourceforge.net
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^ permalink raw reply related [flat|nested] 3+ messages in thread