Fork of alistair23 Linux kernel for reMarkable from https://github.com/alistair23/linux
e4589fa545
When there is a failure in f2fs_fill_super() after/during the recovery of fsync'd nodes, it frees the current sbi and retries again. This time the mount is successful, but the files that got recovered before retry, still holds the extent tree, whose extent nodes list is corrupted since sbi and sbi->extent_list is freed up. The list_del corruption issue is observed when the file system is getting unmounted and when those recoverd files extent node is being freed up in the below context. list_del corruption. prev->next should be fffffff1e1ef5480, but was (null) <...> kernel BUG at kernel/msm-4.14/lib/list_debug.c:53! lr : __list_del_entry_valid+0x94/0xb4 pc : __list_del_entry_valid+0x94/0xb4 <...> Call trace: __list_del_entry_valid+0x94/0xb4 __release_extent_node+0xb0/0x114 __free_extent_tree+0x58/0x7c f2fs_shrink_extent_tree+0xdc/0x3b0 f2fs_leave_shrinker+0x28/0x7c f2fs_put_super+0xfc/0x1e0 generic_shutdown_super+0x70/0xf4 kill_block_super+0x2c/0x5c kill_f2fs_super+0x44/0x50 deactivate_locked_super+0x60/0x8c deactivate_super+0x68/0x74 cleanup_mnt+0x40/0x78 __cleanup_mnt+0x1c/0x28 task_work_run+0x48/0xd0 do_notify_resume+0x678/0xe98 work_pending+0x8/0x14 Fix this by not creating extents for those recovered files if shrinker is not registered yet. Once mount is successful and shrinker is registered, those files can have extents again. Signed-off-by: Sahitya Tummala <stummala@codeaurora.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> |
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| README | ||
README
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.