On 2024/2/7 10:01, Zhiguo Niu wrote:
A panic issue happened in a reboot test in small capacity device
as following:
1.The device size is 64MB, and main area has 24 segments, and
CONFIG_F2FS_CHECK_FS is not enabled.
2.There is no any free segments left shown in free_segmap_info,
then another write request cause get_new_segment get a out-of-bound
segment with segno 24.
3.panic happen in update_sit_entry because access invalid bitmap


Can you please try below patch to see whether it can fix your problem?



More detail shown in following patch sets.
The three patches are splited here because the modifications are
relatively independent and more readable.

Changes of v2: stop checkpoint when get a out-of-bound segment

Zhiguo Niu (4):
   f2fs: correct counting methods of free_segments in __set_inuse
   f2fs: fix panic issue in update_sit_entry
   f2fs: enhance judgment conditions of GET_SEGNO
   f2fs: stop checkpoint when get a out-of-bounds segment

  fs/f2fs/file.c          |  7 ++++++-
  fs/f2fs/segment.c       | 21 ++++++++++++++++-----
  fs/f2fs/segment.h       |  7 ++++---
  include/linux/f2fs_fs.h |  1 +
  4 files changed, 27 insertions(+), 9 deletions(-)

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