On 2019/1/23 7:59, Jaegeuk Kim wrote: > 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;
Actually, IS_VALID_BLK_ADDR() is used in many places, after the check, we may load data from position pointed with @addr, so, we may not return true if addr is equal to NULL_ADDR/NEW_ADDR. Thanks, > + > 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 <aravin...@gmail.com> >> Signed-off-by: Chao Yu <yuch...@huawei.com> >> --- >> 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 > > . > _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel