| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| In the Linux kernel, the following vulnerability has been resolved:
cpufreq: CPPC: Fix possible null-ptr-deref for cppc_get_cpu_cost()
cpufreq_cpu_get_raw() may return NULL if the cpu is not in
policy->cpus cpu mask and it will cause null pointer dereference,
so check NULL for cppc_get_cpu_cost(). |
| In the Linux kernel, the following vulnerability has been resolved:
RDMA/rxe: Fix the qp flush warnings in req
When the qp is in error state, the status of WQEs in the queue should be
set to error. Or else the following will appear.
[ 920.617269] WARNING: CPU: 1 PID: 21 at drivers/infiniband/sw/rxe/rxe_comp.c:756 rxe_completer+0x989/0xcc0 [rdma_rxe]
[ 920.617744] Modules linked in: rnbd_client(O) rtrs_client(O) rtrs_core(O) rdma_ucm rdma_cm iw_cm ib_cm crc32_generic rdma_rxe ip6_udp_tunnel udp_tunnel ib_uverbs ib_core loop brd null_blk ipv6
[ 920.618516] CPU: 1 PID: 21 Comm: ksoftirqd/1 Tainted: G O 6.1.113-storage+ #65
[ 920.618986] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
[ 920.619396] RIP: 0010:rxe_completer+0x989/0xcc0 [rdma_rxe]
[ 920.619658] Code: 0f b6 84 24 3a 02 00 00 41 89 84 24 44 04 00 00 e9 2a f7 ff ff 39 ca bb 03 00 00 00 b8 0e 00 00 00 48 0f 45 d8 e9 15 f7 ff ff <0f> 0b e9 cb f8 ff ff 41 bf f5 ff ff ff e9 08 f8 ff ff 49 8d bc 24
[ 920.620482] RSP: 0018:ffff97b7c00bbc38 EFLAGS: 00010246
[ 920.620817] RAX: 0000000000000000 RBX: 000000000000000c RCX: 0000000000000008
[ 920.621183] RDX: ffff960dc396ebc0 RSI: 0000000000005400 RDI: ffff960dc4e2fbac
[ 920.621548] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffffac406450
[ 920.621884] R10: ffffffffac4060c0 R11: 0000000000000001 R12: ffff960dc4e2f800
[ 920.622254] R13: ffff960dc4e2f928 R14: ffff97b7c029c580 R15: 0000000000000000
[ 920.622609] FS: 0000000000000000(0000) GS:ffff960ef7d00000(0000) knlGS:0000000000000000
[ 920.622979] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 920.623245] CR2: 00007fa056965e90 CR3: 00000001107f1000 CR4: 00000000000006e0
[ 920.623680] Call Trace:
[ 920.623815] <TASK>
[ 920.623933] ? __warn+0x79/0xc0
[ 920.624116] ? rxe_completer+0x989/0xcc0 [rdma_rxe]
[ 920.624356] ? report_bug+0xfb/0x150
[ 920.624594] ? handle_bug+0x3c/0x60
[ 920.624796] ? exc_invalid_op+0x14/0x70
[ 920.624976] ? asm_exc_invalid_op+0x16/0x20
[ 920.625203] ? rxe_completer+0x989/0xcc0 [rdma_rxe]
[ 920.625474] ? rxe_completer+0x329/0xcc0 [rdma_rxe]
[ 920.625749] rxe_do_task+0x80/0x110 [rdma_rxe]
[ 920.626037] rxe_requester+0x625/0xde0 [rdma_rxe]
[ 920.626310] ? rxe_cq_post+0xe2/0x180 [rdma_rxe]
[ 920.626583] ? do_complete+0x18d/0x220 [rdma_rxe]
[ 920.626812] ? rxe_completer+0x1a3/0xcc0 [rdma_rxe]
[ 920.627050] rxe_do_task+0x80/0x110 [rdma_rxe]
[ 920.627285] tasklet_action_common.constprop.0+0xa4/0x120
[ 920.627522] handle_softirqs+0xc2/0x250
[ 920.627728] ? sort_range+0x20/0x20
[ 920.627942] run_ksoftirqd+0x1f/0x30
[ 920.628158] smpboot_thread_fn+0xc7/0x1b0
[ 920.628334] kthread+0xd6/0x100
[ 920.628504] ? kthread_complete_and_exit+0x20/0x20
[ 920.628709] ret_from_fork+0x1f/0x30
[ 920.628892] </TASK> |
| In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to account dirty data in __get_secs_required()
It will trigger system panic w/ testcase in [1]:
------------[ cut here ]------------
kernel BUG at fs/f2fs/segment.c:2752!
RIP: 0010:new_curseg+0xc81/0x2110
Call Trace:
f2fs_allocate_data_block+0x1c91/0x4540
do_write_page+0x163/0xdf0
f2fs_outplace_write_data+0x1aa/0x340
f2fs_do_write_data_page+0x797/0x2280
f2fs_write_single_data_page+0x16cd/0x2190
f2fs_write_cache_pages+0x994/0x1c80
f2fs_write_data_pages+0x9cc/0xea0
do_writepages+0x194/0x7a0
filemap_fdatawrite_wbc+0x12b/0x1a0
__filemap_fdatawrite_range+0xbb/0xf0
file_write_and_wait_range+0xa1/0x110
f2fs_do_sync_file+0x26f/0x1c50
f2fs_sync_file+0x12b/0x1d0
vfs_fsync_range+0xfa/0x230
do_fsync+0x3d/0x80
__x64_sys_fsync+0x37/0x50
x64_sys_call+0x1e88/0x20d0
do_syscall_64+0x4b/0x110
entry_SYSCALL_64_after_hwframe+0x76/0x7e
The root cause is if checkpoint_disabling and lfs_mode are both on,
it will trigger OPU for all overwritten data, it may cost more free
segment than expected, so f2fs must account those data correctly to
calculate cosumed free segments later, and return ENOSPC earlier to
avoid run out of free segment during block allocation.
[1] https://lore.kernel.org/fstests/20241015025106.3203676-1-chao@kernel.org/ |
| In the Linux kernel, the following vulnerability has been resolved:
NFSD: Prevent NULL dereference in nfsd4_process_cb_update()
@ses is initialized to NULL. If __nfsd4_find_backchannel() finds no
available backchannel session, setup_callback_client() will try to
dereference @ses and segfault. |
| In the Linux kernel, the following vulnerability has been resolved:
block: fix uaf for flush rq while iterating tags
blk_mq_clear_flush_rq_mapping() is not called during scsi probe, by
checking blk_queue_init_done(). However, QUEUE_FLAG_INIT_DONE is cleared
in del_gendisk by commit aec89dc5d421 ("block: keep q_usage_counter in
atomic mode after del_gendisk"), hence for disk like scsi, following
blk_mq_destroy_queue() will not clear flush rq from tags->rqs[] as well,
cause following uaf that is found by our syzkaller for v6.6:
==================================================================
BUG: KASAN: slab-use-after-free in blk_mq_find_and_get_req+0x16e/0x1a0 block/blk-mq-tag.c:261
Read of size 4 at addr ffff88811c969c20 by task kworker/1:2H/224909
CPU: 1 PID: 224909 Comm: kworker/1:2H Not tainted 6.6.0-ga836a5060850 #32
Workqueue: kblockd blk_mq_timeout_work
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x91/0xf0 lib/dump_stack.c:106
print_address_description.constprop.0+0x66/0x300 mm/kasan/report.c:364
print_report+0x3e/0x70 mm/kasan/report.c:475
kasan_report+0xb8/0xf0 mm/kasan/report.c:588
blk_mq_find_and_get_req+0x16e/0x1a0 block/blk-mq-tag.c:261
bt_iter block/blk-mq-tag.c:288 [inline]
__sbitmap_for_each_set include/linux/sbitmap.h:295 [inline]
sbitmap_for_each_set include/linux/sbitmap.h:316 [inline]
bt_for_each+0x455/0x790 block/blk-mq-tag.c:325
blk_mq_queue_tag_busy_iter+0x320/0x740 block/blk-mq-tag.c:534
blk_mq_timeout_work+0x1a3/0x7b0 block/blk-mq.c:1673
process_one_work+0x7c4/0x1450 kernel/workqueue.c:2631
process_scheduled_works kernel/workqueue.c:2704 [inline]
worker_thread+0x804/0xe40 kernel/workqueue.c:2785
kthread+0x346/0x450 kernel/kthread.c:388
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:293
Allocated by task 942:
kasan_save_stack+0x22/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc mm/kasan/common.c:383 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:380
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1007 [inline]
__kmalloc_node+0x69/0x170 mm/slab_common.c:1014
kmalloc_node include/linux/slab.h:620 [inline]
kzalloc_node include/linux/slab.h:732 [inline]
blk_alloc_flush_queue+0x144/0x2f0 block/blk-flush.c:499
blk_mq_alloc_hctx+0x601/0x940 block/blk-mq.c:3788
blk_mq_alloc_and_init_hctx+0x27f/0x330 block/blk-mq.c:4261
blk_mq_realloc_hw_ctxs+0x488/0x5e0 block/blk-mq.c:4294
blk_mq_init_allocated_queue+0x188/0x860 block/blk-mq.c:4350
blk_mq_init_queue_data block/blk-mq.c:4166 [inline]
blk_mq_init_queue+0x8d/0x100 block/blk-mq.c:4176
scsi_alloc_sdev+0x843/0xd50 drivers/scsi/scsi_scan.c:335
scsi_probe_and_add_lun+0x77c/0xde0 drivers/scsi/scsi_scan.c:1189
__scsi_scan_target+0x1fc/0x5a0 drivers/scsi/scsi_scan.c:1727
scsi_scan_channel drivers/scsi/scsi_scan.c:1815 [inline]
scsi_scan_channel+0x14b/0x1e0 drivers/scsi/scsi_scan.c:1791
scsi_scan_host_selected+0x2fe/0x400 drivers/scsi/scsi_scan.c:1844
scsi_scan+0x3a0/0x3f0 drivers/scsi/scsi_sysfs.c:151
store_scan+0x2a/0x60 drivers/scsi/scsi_sysfs.c:191
dev_attr_store+0x5c/0x90 drivers/base/core.c:2388
sysfs_kf_write+0x11c/0x170 fs/sysfs/file.c:136
kernfs_fop_write_iter+0x3fc/0x610 fs/kernfs/file.c:338
call_write_iter include/linux/fs.h:2083 [inline]
new_sync_write+0x1b4/0x2d0 fs/read_write.c:493
vfs_write+0x76c/0xb00 fs/read_write.c:586
ksys_write+0x127/0x250 fs/read_write.c:639
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x70/0x120 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x78/0xe2
Freed by task 244687:
kasan_save_stack+0x22/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x50 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
__kasan_slab_free+0x12a/0x1b0 mm/kasan/common.c:244
kasan_slab_free include/linux/kasan.h:164 [in
---truncated--- |
| In the Linux kernel, the following vulnerability has been resolved:
sh: intc: Fix use-after-free bug in register_intc_controller()
In the error handling for this function, d is freed without ever
removing it from intc_list which would lead to a use after free.
To fix this, let's only add it to the list after everything has
succeeded. |
| In the Linux kernel, the following vulnerability has been resolved:
netfilter: ipset: add missing range check in bitmap_ip_uadt
When tb[IPSET_ATTR_IP_TO] is not present but tb[IPSET_ATTR_CIDR] exists,
the values of ip and ip_to are slightly swapped. Therefore, the range check
for ip should be done later, but this part is missing and it seems that the
vulnerability occurs.
So we should add missing range checks and remove unnecessary range checks. |
| In the Linux kernel, the following vulnerability has been resolved:
igb: Fix potential invalid memory access in igb_init_module()
The pci_register_driver() can fail and when this happened, the dca_notifier
needs to be unregistered, otherwise the dca_notifier can be called when
igb fails to install, resulting to invalid memory access. |
| In the Linux kernel, the following vulnerability has been resolved:
spi: mpc52xx: Add cancel_work_sync before module remove
If we remove the module which will call mpc52xx_spi_remove
it will free 'ms' through spi_unregister_controller.
while the work ms->work will be used. The sequence of operations
that may lead to a UAF bug.
Fix it by ensuring that the work is canceled before proceeding with
the cleanup in mpc52xx_spi_remove. |
| In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: MGMT: Fix possible crash on mgmt_index_removed
If mgmt_index_removed is called while there are commands queued on
cmd_sync it could lead to crashes like the bellow trace:
0x0000053D: __list_del_entry_valid_or_report+0x98/0xdc
0x0000053D: mgmt_pending_remove+0x18/0x58 [bluetooth]
0x0000053E: mgmt_remove_adv_monitor_complete+0x80/0x108 [bluetooth]
0x0000053E: hci_cmd_sync_work+0xbc/0x164 [bluetooth]
So while handling mgmt_index_removed this attempts to dequeue
commands passed as user_data to cmd_sync. |
| In the Linux kernel, the following vulnerability has been resolved:
net/smc: check iparea_offset and ipv6_prefixes_cnt when receiving proposal msg
When receiving proposal msg in server, the field iparea_offset
and the field ipv6_prefixes_cnt in proposal msg are from the
remote client and can not be fully trusted. Especially the
field iparea_offset, once exceed the max value, there has the
chance to access wrong address, and crash may happen.
This patch checks iparea_offset and ipv6_prefixes_cnt before using them. |
| In the Linux kernel, the following vulnerability has been resolved:
bcache: revert replacing IS_ERR_OR_NULL with IS_ERR again
Commit 028ddcac477b ("bcache: Remove unnecessary NULL point check in
node allocations") leads a NULL pointer deference in cache_set_flush().
1721 if (!IS_ERR_OR_NULL(c->root))
1722 list_add(&c->root->list, &c->btree_cache);
>From the above code in cache_set_flush(), if previous registration code
fails before allocating c->root, it is possible c->root is NULL as what
it is initialized. __bch_btree_node_alloc() never returns NULL but
c->root is possible to be NULL at above line 1721.
This patch replaces IS_ERR() by IS_ERR_OR_NULL() to fix this. |
| In the Linux kernel, the following vulnerability has been resolved:
net/smc: check smcd_v2_ext_offset when receiving proposal msg
When receiving proposal msg in server, the field smcd_v2_ext_offset in
proposal msg is from the remote client and can not be fully trusted.
Once the value of smcd_v2_ext_offset exceed the max value, there has
the chance to access wrong address, and crash may happen.
This patch checks the value of smcd_v2_ext_offset before using it. |
| In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: don't access invalid sched
Since 2320c9e6a768 ("drm/sched: memset() 'job' in drm_sched_job_init()")
accessing job->base.sched can produce unexpected results as the initialisation
of (*job)->base.sched done in amdgpu_job_alloc is overwritten by the
memset.
This commit fixes an issue when a CS would fail validation and would
be rejected after job->num_ibs is incremented. In this case,
amdgpu_ib_free(ring->adev, ...) will be called, which would crash the
machine because the ring value is bogus.
To fix this, pass a NULL pointer to amdgpu_ib_free(): we can do this
because the device is actually not used in this function.
The next commit will remove the ring argument completely.
(cherry picked from commit 2ae520cb12831d264ceb97c61f72c59d33c0dbd7) |
| In the Linux kernel, the following vulnerability has been resolved:
i3c: mipi-i3c-hci: Mask ring interrupts before ring stop request
Bus cleanup path in DMA mode may trigger a RING_OP_STAT interrupt when
the ring is being stopped. Depending on timing between ring stop request
completion, interrupt handler removal and code execution this may lead
to a NULL pointer dereference in hci_dma_irq_handler() if it gets to run
after the io_data pointer is set to NULL in hci_dma_cleanup().
Prevent this my masking the ring interrupts before ring stop request. |
| In the Linux kernel, the following vulnerability has been resolved:
i3c: Use i3cdev->desc->info instead of calling i3c_device_get_info() to avoid deadlock
A deadlock may happen since the i3c_master_register() acquires
&i3cbus->lock twice. See the log below.
Use i3cdev->desc->info instead of calling i3c_device_info() to
avoid acquiring the lock twice.
v2:
- Modified the title and commit message
============================================
WARNING: possible recursive locking detected
6.11.0-mainline
--------------------------------------------
init/1 is trying to acquire lock:
f1ffff80a6a40dc0 (&i3cbus->lock){++++}-{3:3}, at: i3c_bus_normaluse_lock
but task is already holding lock:
f1ffff80a6a40dc0 (&i3cbus->lock){++++}-{3:3}, at: i3c_master_register
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&i3cbus->lock);
lock(&i3cbus->lock);
*** DEADLOCK ***
May be due to missing lock nesting notation
2 locks held by init/1:
#0: fcffff809b6798f8 (&dev->mutex){....}-{3:3}, at: __driver_attach
#1: f1ffff80a6a40dc0 (&i3cbus->lock){++++}-{3:3}, at: i3c_master_register
stack backtrace:
CPU: 6 UID: 0 PID: 1 Comm: init
Call trace:
dump_backtrace+0xfc/0x17c
show_stack+0x18/0x28
dump_stack_lvl+0x40/0xc0
dump_stack+0x18/0x24
print_deadlock_bug+0x388/0x390
__lock_acquire+0x18bc/0x32ec
lock_acquire+0x134/0x2b0
down_read+0x50/0x19c
i3c_bus_normaluse_lock+0x14/0x24
i3c_device_get_info+0x24/0x58
i3c_device_uevent+0x34/0xa4
dev_uevent+0x310/0x384
kobject_uevent_env+0x244/0x414
kobject_uevent+0x14/0x20
device_add+0x278/0x460
device_register+0x20/0x34
i3c_master_register_new_i3c_devs+0x78/0x154
i3c_master_register+0x6a0/0x6d4
mtk_i3c_master_probe+0x3b8/0x4d8
platform_probe+0xa0/0xe0
really_probe+0x114/0x454
__driver_probe_device+0xa0/0x15c
driver_probe_device+0x3c/0x1ac
__driver_attach+0xc4/0x1f0
bus_for_each_dev+0x104/0x160
driver_attach+0x24/0x34
bus_add_driver+0x14c/0x294
driver_register+0x68/0x104
__platform_driver_register+0x20/0x30
init_module+0x20/0xfe4
do_one_initcall+0x184/0x464
do_init_module+0x58/0x1ec
load_module+0xefc/0x10c8
__arm64_sys_finit_module+0x238/0x33c
invoke_syscall+0x58/0x10c
el0_svc_common+0xa8/0xdc
do_el0_svc+0x1c/0x28
el0_svc+0x50/0xac
el0t_64_sync_handler+0x70/0xbc
el0t_64_sync+0x1a8/0x1ac |
| In the Linux kernel, the following vulnerability has been resolved:
net: wwan: t7xx: Fix FSM command timeout issue
When driver processes the internal state change command, it use an
asynchronous thread to process the command operation. If the main
thread detects that the task has timed out, the asynchronous thread
will panic when executing the completion notification because the
main thread completion object has been released.
BUG: unable to handle page fault for address: fffffffffffffff8
PGD 1f283a067 P4D 1f283a067 PUD 1f283c067 PMD 0
Oops: 0000 [#1] PREEMPT SMP NOPTI
RIP: 0010:complete_all+0x3e/0xa0
[...]
Call Trace:
<TASK>
? __die_body+0x68/0xb0
? page_fault_oops+0x379/0x3e0
? exc_page_fault+0x69/0xa0
? asm_exc_page_fault+0x22/0x30
? complete_all+0x3e/0xa0
fsm_main_thread+0xa3/0x9c0 [mtk_t7xx (HASH:1400 5)]
? __pfx_autoremove_wake_function+0x10/0x10
kthread+0xd8/0x110
? __pfx_fsm_main_thread+0x10/0x10 [mtk_t7xx (HASH:1400 5)]
? __pfx_kthread+0x10/0x10
ret_from_fork+0x38/0x50
? __pfx_kthread+0x10/0x10
ret_from_fork_asm+0x1b/0x30
</TASK>
[...]
CR2: fffffffffffffff8
---[ end trace 0000000000000000 ]---
Use the reference counter to ensure safe release as Sergey suggests:
https://lore.kernel.org/all/da90f64c-260a-4329-87bf-1f9ff20a5951@gmail.com/ |
| In the Linux kernel, the following vulnerability has been resolved:
net: bridge: xmit: make sure we have at least eth header len bytes
syzbot triggered an uninit value[1] error in bridge device's xmit path
by sending a short (less than ETH_HLEN bytes) skb. To fix it check if
we can actually pull that amount instead of assuming.
Tested with dropwatch:
drop at: br_dev_xmit+0xb93/0x12d0 [bridge] (0xffffffffc06739b3)
origin: software
timestamp: Mon May 13 11:31:53 2024 778214037 nsec
protocol: 0x88a8
length: 2
original length: 2
drop reason: PKT_TOO_SMALL
[1]
BUG: KMSAN: uninit-value in br_dev_xmit+0x61d/0x1cb0 net/bridge/br_device.c:65
br_dev_xmit+0x61d/0x1cb0 net/bridge/br_device.c:65
__netdev_start_xmit include/linux/netdevice.h:4903 [inline]
netdev_start_xmit include/linux/netdevice.h:4917 [inline]
xmit_one net/core/dev.c:3531 [inline]
dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3547
__dev_queue_xmit+0x34db/0x5350 net/core/dev.c:4341
dev_queue_xmit include/linux/netdevice.h:3091 [inline]
__bpf_tx_skb net/core/filter.c:2136 [inline]
__bpf_redirect_common net/core/filter.c:2180 [inline]
__bpf_redirect+0x14a6/0x1620 net/core/filter.c:2187
____bpf_clone_redirect net/core/filter.c:2460 [inline]
bpf_clone_redirect+0x328/0x470 net/core/filter.c:2432
___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:1997
__bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2238
bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline]
__bpf_prog_run include/linux/filter.h:657 [inline]
bpf_prog_run include/linux/filter.h:664 [inline]
bpf_test_run+0x499/0xc30 net/bpf/test_run.c:425
bpf_prog_test_run_skb+0x14ea/0x1f20 net/bpf/test_run.c:1058
bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4269
__sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5678
__do_sys_bpf kernel/bpf/syscall.c:5767 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5765 [inline]
__x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5765
x64_sys_call+0x96b/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:322
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f |
| In the Linux kernel, the following vulnerability has been resolved:
fpga: manager: add owner module and take its refcount
The current implementation of the fpga manager assumes that the low-level
module registers a driver for the parent device and uses its owner pointer
to take the module's refcount. This approach is problematic since it can
lead to a null pointer dereference while attempting to get the manager if
the parent device does not have a driver.
To address this problem, add a module owner pointer to the fpga_manager
struct and use it to take the module's refcount. Modify the functions for
registering the manager to take an additional owner module parameter and
rename them to avoid conflicts. Use the old function names for helper
macros that automatically set the module that registers the manager as the
owner. This ensures compatibility with existing low-level control modules
and reduces the chances of registering a manager without setting the owner.
Also, update the documentation to keep it consistent with the new interface
for registering an fpga manager.
Other changes: opportunistically move put_device() from __fpga_mgr_get() to
fpga_mgr_get() and of_fpga_mgr_get() to improve code clarity since the
manager device is taken in these functions. |
| In the Linux kernel, the following vulnerability has been resolved:
RDMA/rtrs: Ensure 'ib_sge list' is accessible
Move the declaration of the 'ib_sge list' variable outside the
'always_invalidate' block to ensure it remains accessible for use
throughout the function.
Previously, 'ib_sge list' was declared within the 'always_invalidate'
block, limiting its accessibility, then caused a
'BUG: kernel NULL pointer dereference'[1].
? __die_body.cold+0x19/0x27
? page_fault_oops+0x15a/0x2d0
? search_module_extables+0x19/0x60
? search_bpf_extables+0x5f/0x80
? exc_page_fault+0x7e/0x180
? asm_exc_page_fault+0x26/0x30
? memcpy_orig+0xd5/0x140
rxe_mr_copy+0x1c3/0x200 [rdma_rxe]
? rxe_pool_get_index+0x4b/0x80 [rdma_rxe]
copy_data+0xa5/0x230 [rdma_rxe]
rxe_requester+0xd9b/0xf70 [rdma_rxe]
? finish_task_switch.isra.0+0x99/0x2e0
rxe_sender+0x13/0x40 [rdma_rxe]
do_task+0x68/0x1e0 [rdma_rxe]
process_one_work+0x177/0x330
worker_thread+0x252/0x390
? __pfx_worker_thread+0x10/0x10
This change ensures the variable is available for subsequent operations
that require it.
[1] https://lore.kernel.org/linux-rdma/6a1f3e8f-deb0-49f9-bc69-a9b03ecfcda7@fujitsu.com/ |
