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commitf6db43076dupstream. As report by Wenqing Liu in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215231 If we enable CONFIG_F2FS_CHECK_FS config, and with fuzzed image attached in above link, we will encounter panic when executing below script: 1. mkdir mnt 2. mount -t f2fs tmp1.img mnt 3. touch tmp F2FS-fs (loop11): mismatched blkaddr 5765 (source_blkaddr 1) in seg 3 kernel BUG at fs/f2fs/gc.c:1042! do_garbage_collect+0x90f/0xa80 [f2fs] f2fs_gc+0x294/0x12a0 [f2fs] f2fs_balance_fs+0x2c5/0x7d0 [f2fs] f2fs_create+0x239/0xd90 [f2fs] lookup_open+0x45e/0xa90 open_last_lookups+0x203/0x670 path_openat+0xae/0x490 do_filp_open+0xbc/0x160 do_sys_openat2+0x2f1/0x500 do_sys_open+0x5e/0xa0 __x64_sys_openat+0x28/0x40 Previously, f2fs tries to catch data inconcistency exception in between SSA and SIT table during GC, however once the exception is caught, it will call f2fs_bug_on to hang kernel, it's not needed, instead, let's set SBI_NEED_FSCK flag and skip migrating current block. Fixes:bbf9f7d90f("f2fs: Fix indefinite loop in f2fs_gc()") Signed-off-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.