mirror-linux/include
David Howells 2c8f4742bb
netfs: Fix potential for tearing in ->remote_i_size and ->zero_point
Fix potential tearing in using ->remote_i_size and ->zero_point by copying
i_size_read() and i_size_write() and using the same seqcount as for i_size.

We need to make sure that netfslib and the filesystems that use it always
hold i_lock whilst updating any of the sizes to prevent i_size_seqcount
from getting corrupted.

Fixes: 4058f74210 ("netfs: Keep track of the actual remote file size")
Fixes: 100ccd18bb ("netfs: Optimise away reads above the point at which there can be no data")
Closes: https://sashiko.dev/#/patchset/20260414082004.3756080-1-dhowells%40redhat.com
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://patch.msgid.link/20260512123404.719402-6-dhowells@redhat.com
cc: Paulo Alcantara <pc@manguebit.org>
cc: Matthew Wilcox <willy@infradead.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
2026-05-12 14:42:30 +02:00
..
acpi Merge branches 'acpi-apei', 'acpi-bus', 'acpi-cppc' and 'acpi-video' 2026-04-30 21:07:06 +02:00
asm-generic hyperv-next for v7.1 2026-04-22 09:50:46 -07:00
clocksource
crypto This update includes the following changes: 2026-04-15 15:22:26 -07:00
cxl
drm amd-drm-fixes-7.1-2026-04-30: 2026-05-01 12:48:57 +10:00
dt-bindings We've finally gotten rid of the struct clk_ops::round_rate() code after months 2026-04-21 08:33:26 -07:00
hyperv x86/hyperv: Skip LP/VP creation on kexec 2026-04-22 06:23:25 +00:00
keys
kunit
kvm
linux netfs: Fix potential for tearing in ->remote_i_size and ->zero_point 2026-05-12 14:42:30 +02:00
math-emu
media
memory
misc
net Bluetooth: l2cap: defer conn param update to avoid conn->lock/hdev->lock inversion 2026-05-06 16:20:51 -04:00
pcmcia
ras
rdma
rv
scsi
soc
sound ASoC: Fixes for v7.1 2026-04-23 09:34:28 +02:00
target
trace NFS client updates for Linux 7.1 2026-04-24 14:20:03 -07:00
uapi Miscellaneous scheduler fixes: 2026-05-08 19:42:10 -07:00
ufs scsi: ufs: core: Fix bRefClkFreq write failure in HS-LSS mode 2026-04-21 20:58:06 -04:00
vdso
video fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-after-free 2026-05-04 10:35:55 +02:00
xen
Kbuild