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After we drop i_data sem, we need to reload the ext4_ext_path structure since the extent tree can change once i_data_sem is released. This addresses the BUG: [52117.465187] ------------[ cut here ]------------ [52117.465686] kernel BUG at fs/ext4/extents.c:1756! ... [52117.478306] Call Trace: [52117.478565] ext4_ext_shift_extents+0x3ee/0x710 [52117.479020] ext4_fallocate+0x139c/0x1b40 [52117.479405] ? __do_sys_newfstat+0x6b/0x80 [52117.479805] vfs_fallocate+0x151/0x4b0 [52117.480177] ksys_fallocate+0x4a/0xa0 [52117.480533] __x64_sys_fallocate+0x22/0x30 [52117.480930] do_syscall_64+0x35/0x80 [52117.481277] entry_SYSCALL_64_after_hwframe+0x44/0xae [52117.481769] RIP: 0033:0x7fa062f855ca Cc: stable@kernel.org Link: https://lore.kernel.org/r/20210903062748.4118886-4-yangerkun@huawei.com Signed-off-by: yangerkun <yangerkun@huawei.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> |
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arch | ||
block | ||
certs | ||
crypto | ||
Documentation | ||
drivers | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
LICENSES | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.clang-format | ||
.cocciconfig | ||
.get_maintainer.ignore | ||
.gitattributes | ||
.gitignore | ||
.mailmap | ||
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 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.