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8b6810f8ac
As Jungyeon reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=203219 - Overview When mounting the attached crafted image and running program, I got this error. Additionally, it hangs on sync after running the program. The image is intentionally fuzzed from a normal f2fs image for testing and I enabled option CONFIG_F2FS_CHECK_FS on. - Reproduces cc poc_06.c mkdir test mount -t f2fs tmp.img test cp a.out test cd test sudo ./a.out sync - Messages kernel BUG at fs/f2fs/node.c:1183! RIP: 0010:f2fs_remove_inode_page+0x294/0x2d0 Call Trace: f2fs_evict_inode+0x2a3/0x3a0 evict+0xba/0x180 __dentry_kill+0xbe/0x160 dentry_kill+0x46/0x180 dput+0xbb/0x100 do_renameat2+0x3c9/0x550 __x64_sys_rename+0x17/0x20 do_syscall_64+0x43/0xf0 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The reason is f2fs_remove_inode_page() will trigger kernel panic due to inconsistent i_blocks value of inode. To avoid panic, let's just print debug message and set SBI_NEED_FSCK to give a hint to fsck for latter repairing of potential image corruption. Signed-off-by: Chao Yu <yuchao0@huawei.com> [Jaegeuk Kim: fix build warning and add unlikely] 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.