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Anthony Iliopoulos c9c9458fbd NFSv4.1: fix backchannel max_resp_sz verification check
[ Upstream commit 191512355e520dfc45c8bc3b56d4de59c3ade33e ]

When the client max_resp_sz is larger than what the server encodes in
its reply, the nfs4_verify_back_channel_attrs() check fails and this
causes nfs4_proc_create_session() to fail, in cases where the client
page size is larger than that of the server and the server does not want
to negotiate upwards.

While this is not a problem with the linux nfs server that will reflect
the proposed value in its reply irrespective of the local page size,
other nfs server implementations may insist on their own max_resp_sz
value, which could be smaller.

Fix this by accepting smaller max_resp_sz values from the server, as
this does not violate the protocol. The server is allowed to decrease
but not increase proposed the size, and as such values smaller than the
client-proposed ones are valid.

Fixes: 43c2e885be ("nfs4: fix channel attribute sanity-checks")
Signed-off-by: Anthony Iliopoulos <ailiop@suse.com>
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-10-15 11:56:36 +02:00
arch sparc: fix accurate exception reporting in copy_{from,to}_user for M7 2025-10-15 11:56:36 +02:00
block block: use int to store blk_stack_limits() return value 2025-10-15 11:56:27 +02:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2025-04-25 10:44:04 +02:00
crypto crypto: rng - Ensure set_ent is always present 2025-10-15 11:56:24 +02:00
Documentation Documentation: trace: historgram-design: Separate sched_waking histogram section heading and the following diagram 2025-10-15 11:56:35 +02:00
drivers coresight: trbe: Return NULL pointer for allocation failures 2025-10-15 11:56:36 +02:00
fs NFSv4.1: fix backchannel max_resp_sz verification check 2025-10-15 11:56:36 +02:00
include bpf: Enforce expected_attach_type for tailcall compatibility 2025-10-15 11:56:29 +02:00
init init: INITRAMFS_PRESERVE_MTIME should depend on BLK_DEV_INITRD 2025-10-15 11:56:25 +02:00
io_uring io_uring: include dying ring in task_work "should cancel" state 2025-09-25 10:58:53 +02:00
ipc ipc: fix to protect IPCS lookups using RCU 2025-06-27 11:07:30 +01:00
kernel bpf: Enforce expected_attach_type for tailcall compatibility 2025-10-15 11:56:29 +02:00
lib minmax: don't use max() in situations that want a C constant expression 2025-10-15 11:56:21 +02:00
LICENSES
mm minmax: make generic MIN() and MAX() macros available everywhere 2025-10-02 13:40:43 +02:00
net wifi: mac80211: fix Rx packet handling when pubsta information is not available 2025-10-15 11:56:35 +02:00
rust rust: module: place cleanup_module() in .exit.text section 2025-07-06 10:57:54 +02:00
samples ftrace/samples: Fix function size computation 2025-09-19 16:29:56 +02:00
scripts gcc-plugins: Remove TODO_verify_il for GCC >= 16 2025-10-15 11:56:20 +02:00
security apparmor: use the condition in AA_BUG_FMT even with debug disabled 2025-08-28 16:26:01 +02:00
sound ASoC: Intel: bytcr_rt5651: Fix invalid quirk input mapping 2025-10-15 11:56:33 +02:00
tools tools/nolibc: make time_t robust if __kernel_old_time_t is missing in host headers 2025-10-15 11:56:29 +02:00
usr kbuild: hdrcheck: fix cross build with clang 2025-06-27 11:07:25 +01:00
virt KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin() 2024-06-27 13:46:21 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore Remove *.orig pattern from .gitignore 2024-10-17 15:21:15 +02:00
.mailmap
.rustfmt.toml
COPYING
CREDITS
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Kconfig
MAINTAINERS sign-file,extract-cert: move common SSL helper functions to a header 2025-04-25 10:44:04 +02:00
Makefile Linux 6.1.155 2025-10-02 13:40:43 +02:00
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