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07eb1d6994
sbi->devs would be initialized only if image enables multiple device feature or blkzoned feature, if blkzoned feature flag was set by fuzz in non-blkzoned device, we will suffer below panic: get_zone_idx fs/f2fs/segment.c:4892 [inline] f2fs_usable_zone_blks_in_seg fs/f2fs/segment.c:4943 [inline] f2fs_usable_blks_in_seg+0x39b/0xa00 fs/f2fs/segment.c:4999 Call Trace: check_block_count+0x69/0x4e0 fs/f2fs/segment.h:704 build_sit_entries fs/f2fs/segment.c:4403 [inline] f2fs_build_segment_manager+0x51da/0xa370 fs/f2fs/segment.c:5100 f2fs_fill_super+0x3880/0x6ff0 fs/f2fs/super.c:3684 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:2896 [inline] path_mount+0x12ae/0x1e70 fs/namespace.c:3216 do_mount fs/namespace.c:3229 [inline] __do_sys_mount fs/namespace.c:3437 [inline] __se_sys_mount fs/namespace.c:3414 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3414 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 Add sanity check to inconsistency on factors: blkzoned flag, device path and device character to avoid above panic. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.