On 01/14, Chao Yu wrote:
> As reported by Aravind:
>
> I built f2fs tools from source (at tag v1.12.0) and was able to get this
> backtrace in gdb:
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff7f8eb54 in f2fs_set_bit (nr=1041170432,
> addr=0x7fffff621010 <error: Cannot access memory at address
> 0x7fffff621010>) at libf2fs.c:312
> 312 mask = 1 << (7 - (nr & 0x07));
> (gdb) where
> addr=0x7fffff621010 <error: Cannot access memory at address
> 0x7fffff621010>) at libf2fs.c:312
>
> > [ 5338.040024] nats:8781, sits:6
> > [ 5338.040027] F2FS-fs (sda2): Failed to initialize F2FS segment manager
> > [ 5338.128893] nats:8781, sits:6
> > [ 5338.128895] F2FS-fs (sda2): Failed to initialize F2FS segment manager
>
> nat_count/nid/blkaddr recorded in journal may be corrupted, let's do
> sanity check on them, skip loading invalid ones during build_node_manager().
This requires the below diff.
--- a/fsck/f2fs.h
+++ b/fsck/f2fs.h
@@ -376,6 +376,9 @@ static inline bool IS_VALID_NID(struct f2fs_sb_info *sbi,
u32 nid)
static inline bool IS_VALID_BLK_ADDR(struct f2fs_sb_info *sbi, u32 addr)
{
+ if (addr == NULL_ADDR || addr == NEW_ADDR)
+ return 1;
+
if (addr >= le64_to_cpu(F2FS_RAW_SUPER(sbi)->block_count) ||
addr < SM_I(sbi)->main_blkaddr) {
DBG(1, "block addr [0x%x]\n", addr);
>
> Reported-by: Aravind R S <[email protected]>
> Signed-off-by: Chao Yu <[email protected]>
> ---
> v3:
> - truncate nat journal table once any journalled nat entry is corrupted
> fsck/mount.c | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/fsck/mount.c b/fsck/mount.c
> index 3966525104a7..51d0a09695eb 100644
> --- a/fsck/mount.c
> +++ b/fsck/mount.c
> @@ -1066,11 +1066,29 @@ static int f2fs_init_nid_bitmap(struct f2fs_sb_info
> *sbi)
> f2fs_set_bit(nid, nm_i->nid_bitmap);
> }
>
> + if (nats_in_cursum(journal) > NAT_JOURNAL_ENTRIES) {
> + MSG(0, "\tError: f2fs_init_nid_bitmap truncate n_nats(%u) to "
> + "NAT_JOURNAL_ENTRIES(%lu)\n",
> + nats_in_cursum(journal), NAT_JOURNAL_ENTRIES);
> + journal->n_nats = cpu_to_le16(NAT_JOURNAL_ENTRIES);
> + }
> +
> for (i = 0; i < nats_in_cursum(journal); i++) {
> block_t addr;
>
> addr = le32_to_cpu(nat_in_journal(journal, i).block_addr);
> + if (!IS_VALID_BLK_ADDR(sbi, addr)) {
> + MSG(0, "\tError: f2fs_init_nid_bitmap: addr(%u) is
> invalid!!!\n", addr);
> + journal->n_nats = cpu_to_le16(i);
> + continue;
> + }
> +
> nid = le32_to_cpu(nid_in_journal(journal, i));
> + if (!IS_VALID_NID(sbi, nid)) {
> + MSG(0, "\tError: f2fs_init_nid_bitmap: nid(%u) is
> invalid!!!\n", nid);
> + journal->n_nats = cpu_to_le16(i);
> + continue;
> + }
> if (addr != NULL_ADDR)
> f2fs_set_bit(nid, nm_i->nid_bitmap);
> }
> --
> 2.18.0.rc1
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