1a932ef4e4
I got these from running generic/475,
WARNING: CPU: 0 PID: 26384 at fs/btrfs/inode.c:3326 btrfs_orphan_commit_root+0x1ac/0x2b0 [btrfs]
BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
IP: btrfs_block_rsv_release+0x1c/0x70 [btrfs]
Call Trace:
btrfs_orphan_release_metadata+0x9f/0x200 [btrfs]
btrfs_orphan_del+0x10d/0x170 [btrfs]
btrfs_setattr+0x500/0x640 [btrfs]
notify_change+0x7ae/0x870
do_truncate+0xca/0x130
vfs_truncate+0x2ee/0x3d0
do_sys_truncate+0xaf/0xf0
SyS_truncate+0xe/0x10
entry_SYSCALL_64_fastpath+0x1f/0x96
The race is between btrfs_orphan_commit_root and btrfs_orphan_del,
t1 t2
btrfs_orphan_commit_root btrfs_orphan_del
spin_lock
check (&root->orphan_inodes)
root->orphan_block_rsv = NULL;
spin_unlock
atomic_dec(&root->orphan_inodes);
access root->orphan_block_rsv
Accessing root->orphan_block_rsv must be done before decreasing
root->orphan_inodes.
cc: <stable@vger.kernel.org> v3.12+
Fixes:
|
||
|---|---|---|
| Documentation | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.