Miklos Szeredi
34468b2e39
fuse: don't truncate cached, mutated symlink ...
[ Upstream commit b4c173dfbb6c78568578ff18f9e8822d7bd0e31b ]
Fuse allows the value of a symlink to change and this property is exploited
by some filesystems (e.g. CVMFS).
It has been observed, that sometimes after changing the symlink contents,
the value is truncated to the old size.
This is caused by fuse_getattr() racing with fuse_reverse_inval_inode().
fuse_reverse_inval_inode() updates the fuse_inode's attr_version, which
results in fuse_change_attributes() exiting before updating the cached
attributes
This is okay, as the cached attributes remain invalid and the next call to
fuse_change_attributes() will likely update the inode with the correct
values.
The reason this causes problems is that cached symlinks will be
returned through page_get_link(), which truncates the symlink to
inode->i_size. This is correct for filesystems that don't mutate
symlinks, but in this case it causes bad behavior.
The solution is to just remove this truncation. This can cause a
regression in a filesystem that relies on supplying a symlink larger than
the file size, but this is unlikely. If that happens we'd need to make
this behavior conditional.
Reported-by: Laura Promberger <laura.promberger@cern.ch>
Tested-by: Sam Lewis <samclewis@google.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Link: https://lore.kernel.org/r/20250220100258.793363-1-mszeredi@redhat.com
Reviewed-by: Bernd Schubert <bschubert@ddn.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-04-10 14:29:36 +02:00
firmware: meson_sm: Rework driver as a proper platform driver
2024-04-13 12:51:26 +02:00
mailbox: zynqmp: Fix typo in IPI documentation
2023-05-17 11:35:55 +02:00
net: xgene: Move shared header file into include/linux
2023-02-06 07:52:47 +01:00
RDMA/mlx5: Enforce same type port association for multiport RoCE
2025-01-09 13:23:34 +01:00
mmc: core: add helpers mmc_regulator_enable/disable_vqmmc
2023-12-13 18:18:15 +01:00
mtd: rawnand: protect access to rawnand devices while in suspend
2024-11-17 14:58:51 +01:00
netfilter: Replace zero-length array with flexible-array member
2025-01-09 13:23:35 +01:00
netfilter: Replace zero-length array with flexible-array member
2025-01-09 13:23:35 +01:00
netfilter: Replace zero-length array with flexible-array member
2025-01-09 13:23:35 +01:00
netfilter: Replace zero-length array with flexible-array member
2025-01-09 13:23:35 +01:00
netfilter: Replace zero-length array with flexible-array member
2025-01-09 13:23:35 +01:00
ASoC: Intel: Move soc_intel_is_foo() helpers to a generic header
2024-08-19 05:33:42 +02:00
power: supply: bq27xxx: Fix poll_interval handling and races on remove
2023-05-30 12:44:10 +01:00
qed: Improve the stack space of filter_config()
2024-08-19 05:33:30 +02:00
kernel/fork: beware of __put_task_struct() calling context
2023-09-23 11:00:03 +02:00
firmware: ti_sci: Replace HTTP links with HTTPS ones
2023-11-20 10:30:12 +01:00
spi: Fix deadlock when adding SPI controllers on SPI buses
2024-11-17 14:58:51 +01:00
SUNRPC: Replace internal use of SOCKWQ_ASYNC_NOSPACE
2024-12-14 19:44:42 +01:00
usb: xhci: Add timeout argument in address_device USB HCD callback
2025-03-13 12:43:05 +01:00
ACPI/IORT: Make iort_msi_map_rid() PCI agnostic
2023-12-13 18:18:10 +01:00
fix bitmap corruption on close_range() with CLOSE_RANGE_UNSHARE
2024-09-04 13:14:50 +02:00
ocfs2/dlm: move BITS_TO_BYTES() to bitops.h for wider use
2023-06-09 10:28:54 +02:00
block: return unsigned int from bdev_io_min
2024-12-14 19:44:41 +01:00
bpf: Add map and need_defer parameters to .map_fd_put_ptr()
2024-02-23 08:24:57 +01:00
cgroup: Move rcu_head up near the top of cgroup_root
2024-12-14 19:44:35 +01:00
clk: Fix undefined reference to `clk_rate_exclusive_{get,put}'
2023-08-30 16:27:27 +02:00
ftruncate: pass a signed offset
2024-07-05 09:08:31 +02:00
Fix gcc 4.9 build issue in 5.4.y
2024-08-19 05:33:53 +02:00
init: Provide arch_cpu_finalize_init()
2023-08-08 19:56:33 +02:00
hrtimers: Push pending hrtimers away from outgoing CPU earlier
2023-12-13 18:18:09 +01:00
bitmap: introduce generic optimized bitmap_size()
2024-09-04 13:14:50 +02:00
cred: switch to using atomic_long_t
2023-12-20 15:41:18 +01:00
debugfs: regset32: Add Runtime PM support
2023-05-17 11:35:32 +02:00
dm mpath: pass IO start time to path selector
2024-09-04 13:14:58 +02:00
driver: platform: Add helper for safer setting of driver_override
2023-11-08 11:23:39 +01:00
linux/dim: Do nothing if no time delta between samples
2023-05-30 12:44:01 +01:00
dma-mapping: add generic helpers for mapping sgtable objects
2023-02-25 11:53:25 +01:00
dma-mapping: drop the dev argument to arch_sync_dma_for_*
2023-04-05 11:16:43 +02:00
dmaengine: fix is_slave_direction() return false when DMA_DEV_TO_DEV
2024-02-23 08:25:06 +01:00
misc: eeprom: eeprom_93cx6: Add quirk for extra read clock cycle
2024-12-14 19:44:55 +01:00
ethernet: Add helper for assigning packet type when dest address does not match device address
2024-05-02 16:18:36 +02:00
eventfd: Export eventfd_ctx_do_read()
2023-09-23 10:59:40 +02:00
bpf: Mark bpf_spin_{lock,unlock}() helpers with notrace correctly
2024-03-26 18:22:15 -04:00
objtool: Add support for intra-function calls
2024-04-13 12:51:29 +02:00
fuse: don't truncate cached, mutated symlink
2025-04-10 14:29:36 +02:00
fsnotify: Do not generate events for O_PATH file descriptors
2024-07-18 11:40:51 +02:00
ftrace: Mark get_lock_parent_ip() __always_inline
2023-04-20 12:07:34 +02:00
mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations
2024-04-13 12:51:34 +02:00
HID: fix HID device resource race between HID core and debugging support
2023-12-08 08:44:23 +01:00
gpu: host1x: mipi: Update tegra_mipi_request() to be node based
2024-03-26 18:22:18 -04:00
hrtimers: Handle CPU state correctly on hotplug
2025-02-01 18:18:51 +01:00
hugetlb: check for undefined shift on 32 bit architectures
2023-02-22 12:50:39 +01:00
Drivers: hv: util: Avoid accessing a ringbuffer not initialized yet
2025-01-09 13:23:33 +01:00
i2c: Use IS_REACHABLE() for substituting empty ACPI functions
2024-09-12 11:03:50 +02:00
clockevents/drivers/i8253: Fix stop sequence for timer 0
2025-04-10 14:29:34 +02:00
Fix termination state for idr_for_each_entry_ul()
2023-11-20 10:30:15 +01:00
net: handle ARPHRD_PPP in dev_is_mac_header_xmit()
2023-09-23 10:59:55 +02:00
team: fix null-ptr-deref when team device type is changed
2023-10-10 21:46:37 +02:00
af_packet: fix vlan_get_protocol_dgram() vs MSG_PEEK
2025-01-09 13:23:35 +01:00
ima: Align ima_file_mmap() parameters with mmap_file LSM hook
2023-03-11 16:44:02 +01:00
interconnect: Add helpers for enabling/disabling a path
2023-08-30 16:27:13 +02:00
tasklet: Introduce new initialization API
2025-03-13 12:43:04 +01:00
iommu: Return right value in iommu_sva_bind_device()
2024-07-05 09:08:16 +02:00
resource: Add irqresource_disabled()
2023-10-25 11:53:22 +02:00
genirq: Allow irq_chip registration functions to take a const irq_chip
2024-08-19 05:33:45 +02:00
genirq: Allow the PM device to originate from irq domain
2024-08-19 05:33:43 +02:00
jbd2: introduce/export functions jbd2_journal_submit|finish_inode_data_buffers()
2024-11-08 16:20:30 +01:00
time: Fix references to _msecs_to_jiffies() handling of values
2024-12-14 19:44:23 +01:00
module: Extend the preempt disabled section in dereference_symbol_descriptor().
2025-03-13 12:42:59 +01:00
panic: Consolidate open-coded panic_on_warn checks
2023-02-06 07:52:50 +01:00
genirq: Fix the return type of kstat_cpu_irqs_sum()
2023-03-11 16:43:38 +01:00
x86/kprobes: Fix arch_check_optimized_kprobe check within optimized_kprobe range
2023-03-11 16:44:02 +01:00
KVM: Explicitly verify target vCPU is online in kvm_get_vcpu()
2025-03-13 12:43:07 +01:00
leds: class: Protect brightness_show() with led_cdev->led_access mutex
2024-12-14 19:44:53 +01:00
ata: libata-sata: increase PMP SRST timeout to 10s
2023-10-10 21:46:42 +02:00
list: add "list_del_init_careful()" to go with "list_empty_careful()"
2023-06-28 10:18:35 +02:00
drm/syncobj: make lockdep complain on WAIT_FOR_SUBMIT v3
2024-03-01 13:13:38 +01:00
lsm: new security_file_ioctl_compat() hook
2024-02-23 08:25:15 +01:00
ext4: fix deadlock due to mbcache entry corruption
2023-01-18 11:41:56 +01:00
mcb: remove is_added flag from mcb_device struct
2023-10-25 11:53:19 +02:00
net: phy: mchp: Add support for LAN8814 QUAD PHY
2024-07-05 09:08:27 +02:00
mm: add remap_pfn_range_notrack
2024-11-17 14:58:53 +01:00
mm: fix ambiguous comments for better code readability
2024-11-17 14:58:53 +01:00
params: lift param_set_uint_minmax to common code
2024-06-16 13:28:45 +02:00
new helper: lookup_positive_unlocked()
2023-09-23 10:59:40 +02:00
net: add dev_net_rcu() helper
2025-03-13 12:43:17 +01:00
Remove DECnet support from kernel
2023-06-21 15:44:10 +02:00
Remove DECnet support from kernel
2023-06-21 15:44:10 +02:00
netpoll: netpoll_send_skb() returns transmit status
2025-04-10 14:29:35 +02:00
fs/nls: make load_nls() take a const parameter
2023-09-23 10:59:38 +02:00
watchdog/perf: define dummy watchdog_update_hrtimer_threshold() on correct config
2023-07-27 08:37:10 +02:00
uaccess: Add speculation barrier to copy_from_user()
2023-02-25 11:53:26 +01:00
nvme-tcp: fix nvme_tcp_term_pdu to match spec
2023-04-05 11:16:38 +02:00
nvme: fixup comment for nvme RDMA Provider Type
2024-07-05 09:08:28 +02:00
mlxsw: spectrum_acl_erp: Fix object nesting warning
2024-08-19 05:33:28 +02:00
of: Add missing 'Return' section in kerneldoc comments
2023-12-13 18:18:11 +01:00
of/irq: Make of_msi_map_rid() PCI bus agnostic
2023-12-13 18:18:11 +01:00
overflow: Allow mixed type arguments
2025-03-13 12:42:52 +01:00
PCI: Add PCI_ERROR_RESPONSE and related definitions
2024-07-05 09:08:25 +02:00
can: ems_pci: move ASIX AX99100 ids to pci_ids.h
2025-03-13 12:43:18 +01:00
perf/core: Add a new read format to get a number of lost samples
2023-12-13 18:18:15 +01:00
driver: platform: Add helper for safer setting of driver_override
2023-11-08 11:23:39 +01:00
PM: domains: Restore comment indentation for generic_pm_domain.child_links
2023-05-17 11:36:04 +02:00
PM: runtime: Have devm_pm_runtime_enable() handle pm_runtime_dont_use_autosuspend()
2024-02-23 08:25:14 +01:00
PM / wakeirq: support enabling wake-up irq after runtime_suspend called
2023-08-11 11:54:00 +02:00
poll_wait: add mb() to fix theoretical race between waitqueue_active() and .poll()
2025-02-01 18:18:51 +01:00
power: supply: core: Refactor power_supply_set_input_current_limit_from_supplier()
2023-06-05 08:17:31 +02:00
pps: Fix a use-after-free
2025-03-13 12:43:19 +01:00
sched/rt: Provide migrate_disable/enable() inlines
2023-11-20 10:30:12 +01:00
printk: declare printk_deferred_{enter,safe}() in include/linux/printk.h
2023-05-17 11:36:04 +02:00
pwm: Fix double shift bug
2023-11-28 16:50:16 +00:00
quota: Fix slow quotaoff
2023-10-25 11:53:18 +02:00
quota: Fix slow quotaoff
2023-10-25 11:53:18 +02:00
scsi: core: raid_class: Remove raid_component_add()
2023-08-30 16:27:27 +02:00
random: always mix cycle counter in add_latent_entropy()
2023-02-25 11:53:25 +01:00
rcu: add a helper to report consolidated flavor QS
2024-03-26 18:22:25 -04:00
regmap: Add bulk read/write callbacks into regmap_config
2024-03-15 10:48:20 -04:00
ring-buffer: Rename ring_buffer_read() to read_buffer_iter_advance()
2024-09-12 11:03:56 +02:00
rpmsg: Fix calling device_lock() on non-initialized device
2023-11-08 11:23:39 +01:00
scatterlist: add generic wrappers for iterating over sgtable objects
2023-02-25 11:53:25 +01:00
lsm: new security_file_ioctl_compat() hook
2024-02-23 08:25:15 +01:00
Revert "8250: add support for ASIX devices with a FIFO bug"
2023-07-27 08:37:38 +02:00
serial: core: fix kernel-doc for uart_port_unlock_irqrestore()
2024-05-02 16:18:37 +02:00
sh: intc: Avoid spurious sizeof-pointer-div warning
2023-03-22 13:28:08 +01:00
skbuff: introduce skb_expand_head()
2025-01-09 13:23:32 +01:00
net: stmmac: do not stop RX_CLK in Rx LPI state for qcs404 SoC
2023-02-22 12:50:34 +01:00
lib/string_helpers: Introduce string_upper() and string_lower() helpers
2023-05-30 12:44:08 +01:00
ftruncate: pass a signed offset
2024-07-05 09:08:31 +02:00
sysctl: add a new register_sysctl_init() interface
2023-02-06 07:52:48 +01:00
tcp: add TCP_INFO status for failed client TFO
2024-07-18 11:40:53 +02:00
tick/nohz: Fix cpu_is_hotpluggable() by checking with nohz subsystem
2023-05-17 11:35:57 +02:00
timers: Rename del_timer_sync() to timer_delete_sync()
2024-04-13 12:51:21 +02:00
efi: tpm: Avoid READ_ONCE() for accessing the event log
2023-01-18 11:42:00 +01:00
tracing: Constify string literal data member in struct trace_event_call
2025-01-09 13:23:33 +01:00
tracing: Make tracepoint lockdep check actually test something
2023-03-22 13:28:08 +01:00
tty: Prevent writing chars during tcsetattr TCSADRAIN/FLUSH
2023-05-17 11:36:04 +02:00
u64_stats: fix u64_stats_init() for lockdep when used repeatedly in one file
2024-05-02 16:18:28 +02:00
uaccess: Add minimum bounds check on kernel buffer size
2023-03-11 16:43:56 +01:00
units: add the HZ macros
2024-02-23 08:24:47 +01:00
xhci: use pm_ptr() instead of #ifdef for CONFIG_PM conditionals
2025-02-01 18:18:54 +01:00
util_macros.h: fix/rework find_closest() macros
2024-12-14 19:44:43 +01:00
vfio: Introduce interface to flush virqfd inject workqueue
2024-04-13 12:51:34 +02:00
net: do not allow gso_size to be set to GSO_BY_FRAGS
2023-08-30 16:27:17 +02:00
linux/vt_buffer.h: allow either builtin or modular for macros
2023-05-17 11:35:46 +02:00
epoll: Add synchronous wakeup support for ep_poll_callback
2025-01-09 13:23:32 +01:00
workqueue: clean up WORK_* constant types, clarify masking
2023-07-27 08:37:29 +02:00
