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 pointer.
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(-) -- 1.9.1 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
