Package: src:linux Version: 6.1.162-1 Severity: normal Dear Maintainer,
after upgrading from Linux 6.1.158 to 6.1.162, NFS client writes fail with input/output errors (EIO). Environment: - Debian Bookworm - Kernel: 6.1.0-43-amd64 (6.1.162-1) - NFSv4.2 (also reproducible with 4.1) - Default mount options include rsize=1048576,wsize=1048576 Reproducer: dd if=/dev/zero of=~/testfile bs=1M count=500 or dd if=/dev/zero of=~/testfile bs=4k count=100000 On different computers and VMs! Result: dd: closing output file: Input/output error Workaround: Mount with: rsize=65536,wsize=65536 With reduced I/O size, the issue disappears completely. Impact: - File writes fail (file >1M) - KDE Plasma crashes due to corrupted cache/config writes The issue does NOT occur on kernel 6.1.0-42 (6.1.158). -- Package-specific info: ** Version: Linux version 6.1.0-43-amd64 ([email protected]) (gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT_DYNAMIC Debian 6.1.162-1 (2026-02-08) ** Command line: BOOT_IMAGE=/boot/vmlinuz-6.1.0-43-amd64 root=UUID=416111a9-ddfd-4f65-b3a0-e77a3c548017 ro elevator=noop ** Not tainted ** Loaded modules: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs snd_seq_dummy snd_hrtimer snd_seq snd_seq_device tls qrtr rfkill sunrpc binfmt_misc snd_hda_intel sha512_ssse3 sha512_generic sha256_ssse3 nls_ascii snd_intel_dspcfg sha1_ssse3 snd_intel_sdw_acpi nls_cp437 snd_hda_codec snd_hda_core snd_hwdep snd_pcm bochs vfat fat aesni_intel snd_timer iTCO_wdt drm_vram_helper intel_pmc_bxt crypto_simd drm_ttm_helper iTCO_vendor_support ttm snd cryptd pcspkr watchdog virtio_rng virtio_balloon virtio_console drm_kms_helper soundcore button sg joydev evdev serio_raw msr parport_pc ppdev lp parport loop fuse drm dm_mod efi_pstore configfs efivarfs qemu_fw_cfg ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic hid_generic usbhid hid sd_mod t10_pi crc64_rocksoft crc64 crc_t10dif crct10dif_generic ahci crct10dif_common libahci virtio_net libata net_failover virtio_scsi failover scsi_mod psmouse crc32c_intel scsi_common virtio_pci i2c_i801 uhci_hcd ehci_pci virtio_pci_legacy_dev i2c_smbus virtio_pci_modern_dev ehci_hcd virtio virtio_ring lpc_ich usbcore usb_common -- System Information: Debian Release: 12.13 APT prefers oldstable-updates APT policy: (500, 'oldstable-updates'), (500, 'oldstable-security'), (500, 'oldstable') Architecture: amd64 (x86_64) Kernel: Linux 6.1.0-43-amd64 (SMP w/8 CPU threads; PREEMPT) Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages linux-image-6.1.0-43-amd64 depends on: ii initramfs-tools [linux-initramfs-tool] 0.142+deb12u3 ii kmod 30+20221128-1 ii linux-base 4.9 Versions of packages linux-image-6.1.0-43-amd64 recommends: ii apparmor 3.0.8-3 ii firmware-linux-free 20200122-1 Versions of packages linux-image-6.1.0-43-amd64 suggests: pn debian-kernel-handbook <none> ii grub-efi-amd64 2.06-13+deb12u1 pn linux-doc-6.1 <none> Versions of packages linux-image-6.1.0-43-amd64 is related to: ii firmware-amd-graphics 20230210-5 pn firmware-atheros <none> ii firmware-bnx2 20230210-5 ii firmware-bnx2x 20230210-5 pn firmware-brcm80211 <none> pn firmware-cavium <none> pn firmware-intel-sound <none> pn firmware-intelwimax <none> pn firmware-ipw2x00 <none> pn firmware-ivtv <none> pn firmware-iwlwifi <none> pn firmware-libertas <none> ii firmware-linux-nonfree 20230210-5 ii firmware-misc-nonfree 20230210-5 pn firmware-myricom <none> pn firmware-netxen <none> pn firmware-qlogic <none> pn firmware-realtek <none> pn firmware-samsung <none> pn firmware-siano <none> pn firmware-ti-connectivity <none> pn xen-hypervisor <none> -- no debconf information
