mirror of
https://github.com/torvalds/linux.git
synced 2026-05-12 16:18:45 +02:00
Linux kernel source tree
04679f3c27
mark_buffer_write_io_error sets sb->s_wb_err to -EIO twice.
Once in mapping_set_error and once in errseq_set.
Only mapping_set_error checks if bh->b_assoc_map->host is NULL.
Discovered during null pointer dereference during writeback
to a failing device:
[<ffffffff9a416dc8>] ? mark_buffer_write_io_error+0x98/0xc0
[<ffffffff9a416dbe>] ? mark_buffer_write_io_error+0x8e/0xc0
[<ffffffff9ad4bda0>] end_buffer_async_write+0x90/0xd0
[<ffffffff9ad4e3eb>] end_bio_bh_io_sync+0x2b/0x40
[<ffffffff9adbafe6>] blk_update_request+0x1b6/0x480
[<ffffffff9adbb3d8>] blk_mq_end_request+0x18/0x30
[<ffffffff9adbc6aa>] blk_mq_dispatch_rq_list+0x4da/0x8e0
[<ffffffff9adc0a68>] __blk_mq_sched_dispatch_requests+0x218/0x6a0
[<ffffffff9adc07fa>] blk_mq_sched_dispatch_requests+0x3a/0x80
[<ffffffff9adbbb98>] blk_mq_run_hw_queue+0x108/0x330
[<ffffffff9adbcf58>] blk_mq_flush_plug_list+0x178/0x5f0
[<ffffffff9adb6741>] __blk_flush_plug+0x41/0x120
[<ffffffff9adb6852>] blk_finish_plug+0x22/0x40
[<ffffffff9ad47cb0>] wb_writeback+0x150/0x280
[<ffffffff9ac5343f>] ? set_worker_desc+0x9f/0xc0
[<ffffffff9ad4676e>] wb_workfn+0x24e/0x4a0
Fixes:
|
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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 reStructuredText 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.