rainbutterfly/cve_corpus huggingface dataset:
CVE-2022-50321 wifi: brcmfmac: fix potential memory leak in brcmf_netdev_start_xmit()
In the Linux kernel, the following vulnerability has been resolved:

wifi: brcmfmac: fix potential memory leak in brcmf_netdev_start_xmit()

The brcmf_netdev_start_xmit() returns NETDEV_TX_OK without freeing skb
in case of pskb_expand_head() fails, add dev_kfree_skb() to fix it.
Compile tested only.
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-15T14:48:54.808Z
CVE-2022-50322 rtc: msc313: Fix function prototype mismatch in msc313_rtc_probe()
In the Linux kernel, the following vulnerability has been resolved:

rtc: msc313: Fix function prototype mismatch in msc313_rtc_probe()

With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG),
indirect call targets are validated against the expected function
pointer prototype to make sure the call target is valid to help mitigate
ROP attacks. If they are not identical, there is a failure at run time,
which manifests as either a kernel panic or thread getting killed.

msc313_rtc_probe() was passing clk_disable_unprepare() directly, which
did not have matching prototypes for devm_add_action_or_reset()'s
callback argument. Refactor to use devm_clk_get_enabled() instead.

This was found as a result of Clang's new -Wcast-function-type-strict
flag, which is more sensitive than the simpler -Wcast-function-type,
which only checks for type width mismatches.
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-15T14:48:55.905Z
CVE-2022-50324 mtd: maps: pxa2xx-flash: fix memory leak in probe
In the Linux kernel, the following vulnerability has been resolved:

mtd: maps: pxa2xx-flash: fix memory leak in probe

Free 'info' upon remapping error to avoid a memory leak.

[<miquel.raynal@bootlin.com>: Reword the commit log]
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-15T14:49:18.426Z
CVE-2022-50325 ASoC: Intel: avs: Fix potential RX buffer overflow
In the Linux kernel, the following vulnerability has been resolved:

ASoC: Intel: avs: Fix potential RX buffer overflow

If an event caused firmware to return invalid RX size for
LARGE_CONFIG_GET, memcpy_fromio() could end up copying too many bytes.
Fix by utilizing min_t().
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-15T14:49:19.788Z
CVE-2022-50326 media: airspy: fix memory leak in airspy probe
In the Linux kernel, the following vulnerability has been resolved:

media: airspy: fix memory leak in airspy probe

The commit ca9dc8d06ab6 ("media: airspy: respect the DMA coherency
 rules") moves variable buf from stack to heap, however, it only frees
buf in the error handling code, missing deallocation in the success
path.

Fix this by freeing buf in the success path since this variable does not
have any references in other code.
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-15T14:49:24.523Z
CVE-2022-50327 ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value
In the Linux kernel, the following vulnerability has been resolved:

ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value

The return value of acpi_fetch_acpi_dev() could be NULL, which would
cause a NULL pointer dereference to occur in acpi_device_hid().

[ rjw: Subject and changelog edits, added empty line after if () ]
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-15T14:49:26.711Z
CVE-2022-50328 jbd2: fix potential use-after-free in jbd2_fc_wait_bufs
In the Linux kernel, the following vulnerability has been resolved:

jbd2: fix potential use-after-free in jbd2_fc_wait_bufs

In 'jbd2_fc_wait_bufs' use 'bh' after put buffer head reference count
which may lead to use-after-free.
So judge buffer if uptodate before put buffer head reference count.
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-15T14:49:30.483Z
CVE-2022-50329 block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq
In the Linux kernel, the following vulnerability has been resolved:

block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq

Commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'")
will access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq()
can free bfqq first, and then call bic_set_bfqq(), which will cause uaf.

Fix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq().
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: unaffected
Published: 2025-09-15T14:49:32.123Z
CVE-2022-50330 crypto: cavium - prevent integer overflow loading firmware
In the Linux kernel, the following vulnerability has been resolved:

crypto: cavium - prevent integer overflow loading firmware

The "code_length" value comes from the firmware file.  If your firmware
is untrusted realistically there is probably very little you can do to
protect yourself.  Still we try to limit the damage as much as possible.
Also Smatch marks any data read from the filesystem as untrusted and
prints warnings if it not capped correctly.

The "ntohl(ucode->code_length) * 2" multiplication can have an
integer overflow.
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-15T14:49:33.015Z
CVE-2022-50331 wwan_hwsim: fix possible memory leak in wwan_hwsim_dev_new()
In the Linux kernel, the following vulnerability has been resolved:

wwan_hwsim: fix possible memory leak in wwan_hwsim_dev_new()

Inject fault while probing module, if device_register() fails,
but the refcount of kobject is not decreased to 0, the name
allocated in dev_set_name() is leaked. Fix this by calling
put_device(), so that name can be freed in callback function
kobject_cleanup().

unreferenced object 0xffff88810152ad20 (size 8):
  comm "modprobe", pid 252, jiffies 4294849206 (age 22.713s)
  hex dump (first 8 bytes):
    68 77 73 69 6d 30 00 ff                          hwsim0..
  backtrace:
    [<000000009c3504ed>] __kmalloc_node_track_caller+0x44/0x1b0
    [<00000000c0228a5e>] kvasprintf+0xb5/0x140
    [<00000000cff8c21f>] kvasprintf_const+0x55/0x180
    [<0000000055a1e073>] kobject_set_name_vargs+0x56/0x150
    [<000000000a80b139>] dev_set_name+0xab/0xe0
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-15T14:49:41.415Z
CVE-2022-50332 video/aperture: Call sysfb_disable() before removing PCI devices
In the Linux kernel, the following vulnerability has been resolved:

video/aperture: Call sysfb_disable() before removing PCI devices

Call sysfb_disable() from aperture_remove_conflicting_pci_devices()
before removing PCI devices. Without, simpledrm can still bind to
simple-framebuffer devices after the hardware driver has taken over
the hardware. Both drivers interfere with each other and results are
undefined.

Reported modesetting errors [1] are shown below.

---- snap ----
rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 13-.... } 7 jiffies s: 165 root: 0x2000/.
rcu: blocking rcu_node structures (internal RCU debug):
Task dump for CPU 13:
task:X               state:R  running task     stack:    0 pid: 4242 ppid:  4228 flags:0x00000008
Call Trace:
 <TASK>
 ? commit_tail+0xd7/0x130
 ? drm_atomic_helper_commit+0x126/0x150
 ? drm_atomic_commit+0xa4/0xe0
 ? drm_plane_get_damage_clips.cold+0x1c/0x1c
 ? drm_atomic_helper_dirtyfb+0x19e/0x280
 ? drm_mode_dirtyfb_ioctl+0x10f/0x1e0
 ? drm_mode_getfb2_ioctl+0x2d0/0x2d0
 ? drm_ioctl_kernel+0xc4/0x150
 ? drm_ioctl+0x246/0x3f0
 ? drm_mode_getfb2_ioctl+0x2d0/0x2d0
 ? __x64_sys_ioctl+0x91/0xd0
 ? do_syscall_64+0x60/0xd0
 ? entry_SYSCALL_64_after_hwframe+0x4b/0xb5
 </TASK>
...
rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 13-.... } 30 jiffies s: 169 root: 0x2000/.
rcu: blocking rcu_node structures (internal RCU debug):
Task dump for CPU 13:
task:X               state:R  running task     stack:    0 pid: 4242 ppid:  4228 flags:0x0000400e
Call Trace:
 <TASK>
 ? memcpy_toio+0x76/0xc0
 ? memcpy_toio+0x1b/0xc0
 ? drm_fb_memcpy_toio+0x76/0xb0
 ? drm_fb_blit_toio+0x75/0x2b0
 ? simpledrm_simple_display_pipe_update+0x132/0x150
 ? drm_atomic_helper_commit_planes+0xb6/0x230
 ? drm_atomic_helper_commit_tail+0x44/0x80
 ? commit_tail+0xd7/0x130
 ? drm_atomic_helper_commit+0x126/0x150
 ? drm_atomic_commit+0xa4/0xe0
 ? drm_plane_get_damage_clips.cold+0x1c/0x1c
 ? drm_atomic_helper_dirtyfb+0x19e/0x280
 ? drm_mode_dirtyfb_ioctl+0x10f/0x1e0
 ? drm_mode_getfb2_ioctl+0x2d0/0x2d0
 ? drm_ioctl_kernel+0xc4/0x150
 ? drm_ioctl+0x246/0x3f0
 ? drm_mode_getfb2_ioctl+0x2d0/0x2d0
 ? __x64_sys_ioctl+0x91/0xd0
 ? do_syscall_64+0x60/0xd0
 ? entry_SYSCALL_64_after_hwframe+0x4b/0xb5
 </TASK>

The problem was added by commit 5e0137612430 ("video/aperture: Disable
and unregister sysfb devices via aperture helpers") to v6.0.3 and does
not exist in the mainline branch.

The mainline commit 5e0137612430 ("video/aperture: Disable and
unregister sysfb devices via aperture helpers") has been backported
from v6.0-rc1 to stable v6.0.3 from a larger patch series [2] that
reworks fbdev framebuffer ownership. The backport misses a change to
aperture_remove_conflicting_pci_devices(). Mainline itself is fine,
because the function does not exist there as a result of the patch
series.

Instead of backporting the whole series, fix the additional function.
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: unaffected
Published: 2025-09-15T14:49:42.733Z
CVE-2022-50333 fs: jfs: fix shift-out-of-bounds in dbDiscardAG
In the Linux kernel, the following vulnerability has been resolved:

fs: jfs: fix shift-out-of-bounds in dbDiscardAG

This should be applied to most URSAN bugs found recently by syzbot,
by guarding the dbMount. As syzbot feeding rubbish into the bmap
descriptor.
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-15T14:49:46.222Z
CVE-2022-50334 hugetlbfs: fix null-ptr-deref in hugetlbfs_parse_param()
In the Linux kernel, the following vulnerability has been resolved:

hugetlbfs: fix null-ptr-deref in hugetlbfs_parse_param()

Syzkaller reports a null-ptr-deref bug as follows:
======================================================
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
RIP: 0010:hugetlbfs_parse_param+0x1dd/0x8e0 fs/hugetlbfs/inode.c:1380
[...]
Call Trace:
 <TASK>
 vfs_parse_fs_param fs/fs_context.c:148 [inline]
 vfs_parse_fs_param+0x1f9/0x3c0 fs/fs_context.c:129
 vfs_parse_fs_string+0xdb/0x170 fs/fs_context.c:191
 generic_parse_monolithic+0x16f/0x1f0 fs/fs_context.c:231
 do_new_mount fs/namespace.c:3036 [inline]
 path_mount+0x12de/0x1e20 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
 [...]
 </TASK>
======================================================

According to commit "vfs: parse: deal with zero length string value",
kernel will set the param->string to null pointer in vfs_parse_fs_string()
if fs string has zero length.

Yet the problem is that, hugetlbfs_parse_param() will dereference the
param->string, without checking whether it is a null pointer.  To be more
specific, if hugetlbfs_parse_param() parses an illegal mount parameter,
such as "size=,", kernel will constructs struct fs_parameter with null
pointer in vfs_parse_fs_string(), then passes this struct fs_parameter to
hugetlbfs_parse_param(), which triggers the above null-ptr-deref bug.

This patch solves it by adding sanity check on param->string
in hugetlbfs_parse_param().
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-15T14:49:48.608Z
CVE-2022-50335 9p: set req refcount to zero to avoid uninitialized usage
In the Linux kernel, the following vulnerability has been resolved:

9p: set req refcount to zero to avoid uninitialized usage

When a new request is allocated, the refcount will be zero if it is
reused, but if the request is newly allocated from slab, it is not fully
initialized before being added to idr.

If the p9_read_work got a response before the refcount initiated. It will
use a uninitialized req, which will result in a bad request data struct.

Here is the logs from syzbot.

Corrupted memory at 0xffff88807eade00b [ 0xff 0x07 0x00 0x00 0x00 0x00
0x00 0x00 . . . . . . . . ] (in kfence-#110):
 p9_fcall_fini net/9p/client.c:248 [inline]
 p9_req_put net/9p/client.c:396 [inline]
 p9_req_put+0x208/0x250 net/9p/client.c:390
 p9_client_walk+0x247/0x540 net/9p/client.c:1165
 clone_fid fs/9p/fid.h:21 [inline]
 v9fs_fid_xattr_set+0xe4/0x2b0 fs/9p/xattr.c:118
 v9fs_xattr_set fs/9p/xattr.c:100 [inline]
 v9fs_xattr_handler_set+0x6f/0x120 fs/9p/xattr.c:159
 __vfs_setxattr+0x119/0x180 fs/xattr.c:182
 __vfs_setxattr_noperm+0x129/0x5f0 fs/xattr.c:216
 __vfs_setxattr_locked+0x1d3/0x260 fs/xattr.c:277
 vfs_setxattr+0x143/0x340 fs/xattr.c:309
 setxattr+0x146/0x160 fs/xattr.c:617
 path_setxattr+0x197/0x1c0 fs/xattr.c:636
 __do_sys_setxattr fs/xattr.c:652 [inline]
 __se_sys_setxattr fs/xattr.c:648 [inline]
 __ia32_sys_setxattr+0xc0/0x160 fs/xattr.c:648
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Below is a similar scenario, the scenario in the syzbot log looks more
complicated than this one, but this patch can fix it.

     T21124                   p9_read_work
======================== second trans =================================
p9_client_walk
  p9_client_rpc
    p9_client_prepare_req
      p9_tag_alloc
        req = kmem_cache_alloc(p9_req_cache, GFP_NOFS);
        tag = idr_alloc
        << preempted >>
        req->tc.tag = tag;
                            /* req->[refcount/tag] == uninitialized */
                            m->rreq = p9_tag_lookup(m->client, m->rc.tag);
                              /* increments uninitalized refcount */

        refcount_set(&req->refcount, 2);
                            /* cb drops one ref */
                            p9_client_cb(req)
                            /* reader thread drops its ref:
                               request is incorrectly freed */
                            p9_req_put(req)
    /* use after free and ref underflow */
    p9_req_put(req)

To fix it, we can initialize the refcount to zero before add to idr.
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-15T14:49:50.150Z
CVE-2022-50337 ocxl: fix pci device refcount leak when calling get_function_0()
In the Linux kernel, the following vulnerability has been resolved:

ocxl: fix pci device refcount leak when calling get_function_0()

get_function_0() calls pci_get_domain_bus_and_slot(), as comment
says, it returns a pci device with refcount increment, so after
using it, pci_dev_put() needs be called.

Get the device reference when get_function_0() is not called, so
pci_dev_put() can be called in the error path and callers
unconditionally. And add comment above get_dvsec_vendor0() to tell
callers to call pci_dev_put().
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-15T14:49:52.919Z
CVE-2022-50339 Bluetooth: avoid hci_dev_test_and_set_flag() in mgmt_init_hdev()
In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: avoid hci_dev_test_and_set_flag() in mgmt_init_hdev()

syzbot is again reporting attempt to cancel uninitialized work
at mgmt_index_removed() [1], for setting of HCI_MGMT flag from
mgmt_init_hdev() from hci_mgmt_cmd() from hci_sock_sendmsg() can
race with testing of HCI_MGMT flag from mgmt_index_removed() from
hci_sock_bind() due to lack of serialization via hci_dev_lock().

Since mgmt_init_hdev() is called with mgmt_chan_list_lock held, we can
safely split hci_dev_test_and_set_flag() into hci_dev_test_flag() and
hci_dev_set_flag(). Thus, in order to close this race, set HCI_MGMT flag
after INIT_DELAYED_WORK() completed.

This is a local fix based on mgmt_chan_list_lock. Lack of serialization
via hci_dev_lock() might be causing different race conditions somewhere
else. But a global fix based on hci_dev_lock() should deserve a future
patch.
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-16T16:11:19.138Z
CVE-2022-50340 media: vimc: Fix wrong function called when vimc_init() fails
In the Linux kernel, the following vulnerability has been resolved:

media: vimc: Fix wrong function called when vimc_init() fails

In vimc_init(), when platform_driver_register(&vimc_pdrv) fails,
platform_driver_unregister(&vimc_pdrv) is wrongly called rather than
platform_device_unregister(&vimc_pdev), which causes kernel warning:

 Unexpected driver unregister!
 WARNING: CPU: 1 PID: 14517 at drivers/base/driver.c:270 driver_unregister+0x8f/0xb0
 RIP: 0010:driver_unregister+0x8f/0xb0
 Call Trace:
  <TASK>
  vimc_init+0x7d/0x1000 [vimc]
  do_one_initcall+0xd0/0x4e0
  do_init_module+0x1cf/0x6b0
  load_module+0x65c2/0x7820
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-16T16:11:19.986Z
CVE-2022-50341 cifs: fix oops during encryption
In the Linux kernel, the following vulnerability has been resolved:

cifs: fix oops during encryption

When running xfstests against Azure the following oops occurred on an
arm64 system

  Unable to handle kernel write to read-only memory at virtual address
  ffff0001221cf000
  Mem abort info:
    ESR = 0x9600004f
    EC = 0x25: DABT (current EL), IL = 32 bits
    SET = 0, FnV = 0
    EA = 0, S1PTW = 0
    FSC = 0x0f: level 3 permission fault
  Data abort info:
    ISV = 0, ISS = 0x0000004f
    CM = 0, WnR = 1
  swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000294f3000
  [ffff0001221cf000] pgd=18000001ffff8003, p4d=18000001ffff8003,
  pud=18000001ff82e003, pmd=18000001ff71d003, pte=00600001221cf787
  Internal error: Oops: 9600004f [#1] PREEMPT SMP
  ...
  pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--)
  pc : __memcpy+0x40/0x230
  lr : scatterwalk_copychunks+0xe0/0x200
  sp : ffff800014e92de0
  x29: ffff800014e92de0 x28: ffff000114f9de80 x27: 0000000000000008
  x26: 0000000000000008 x25: ffff800014e92e78 x24: 0000000000000008
  x23: 0000000000000001 x22: 0000040000000000 x21: ffff000000000000
  x20: 0000000000000001 x19: ffff0001037c4488 x18: 0000000000000014
  x17: 235e1c0d6efa9661 x16: a435f9576b6edd6c x15: 0000000000000058
  x14: 0000000000000001 x13: 0000000000000008 x12: ffff000114f2e590
  x11: ffffffffffffffff x10: 0000040000000000 x9 : ffff8000105c3580
  x8 : 2e9413b10000001a x7 : 534b4410fb86b005 x6 : 534b4410fb86b005
  x5 : ffff0001221cf008 x4 : ffff0001037c4490 x3 : 0000000000000001
  x2 : 0000000000000008 x1 : ffff0001037c4488 x0 : ffff0001221cf000
  Call trace:
   __memcpy+0x40/0x230
   scatterwalk_map_and_copy+0x98/0x100
   crypto_ccm_encrypt+0x150/0x180
   crypto_aead_encrypt+0x2c/0x40
   crypt_message+0x750/0x880
   smb3_init_transform_rq+0x298/0x340
   smb_send_rqst.part.11+0xd8/0x180
   smb_send_rqst+0x3c/0x100
   compound_send_recv+0x534/0xbc0
   smb2_query_info_compound+0x32c/0x440
   smb2_set_ea+0x438/0x4c0
   cifs_xattr_set+0x5d4/0x7c0

This is because in scatterwalk_copychunks(), we attempted to write to
a buffer (@sign) that was allocated in the stack (vmalloc area) by
crypt_message() and thus accessing its remaining 8 (x2) bytes ended up
crossing a page boundary.

To simply fix it, we could just pass @sign kmalloc'd from
crypt_message() and then we're done.  Luckily, we don't seem to pass
any other vmalloc'd buffers in smb_rqst::rq_iov...

Instead, let's map the correct pages and offsets from vmalloc buffers
as well in cifs_sg_set_buf() and then avoiding such oopses.
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-16T16:11:20.838Z
CVE-2022-50342 floppy: Fix memory leak in do_floppy_init()
In the Linux kernel, the following vulnerability has been resolved:

floppy: Fix memory leak in do_floppy_init()

A memory leak was reported when floppy_alloc_disk() failed in
do_floppy_init().

unreferenced object 0xffff888115ed25a0 (size 8):
  comm "modprobe", pid 727, jiffies 4295051278 (age 25.529s)
  hex dump (first 8 bytes):
    00 ac 67 5b 81 88 ff ff                          ..g[....
  backtrace:
    [<000000007f457abb>] __kmalloc_node+0x4c/0xc0
    [<00000000a87bfa9e>] blk_mq_realloc_tag_set_tags.part.0+0x6f/0x180
    [<000000006f02e8b1>] blk_mq_alloc_tag_set+0x573/0x1130
    [<0000000066007fd7>] 0xffffffffc06b8b08
    [<0000000081f5ac40>] do_one_initcall+0xd0/0x4f0
    [<00000000e26d04ee>] do_init_module+0x1a4/0x680
    [<000000001bb22407>] load_module+0x6249/0x7110
    [<00000000ad31ac4d>] __do_sys_finit_module+0x140/0x200
    [<000000007bddca46>] do_syscall_64+0x35/0x80
    [<00000000b5afec39>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
unreferenced object 0xffff88810fc30540 (size 32):
  comm "modprobe", pid 727, jiffies 4295051278 (age 25.529s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000007f457abb>] __kmalloc_node+0x4c/0xc0
    [<000000006b91eab4>] blk_mq_alloc_tag_set+0x393/0x1130
    [<0000000066007fd7>] 0xffffffffc06b8b08
    [<0000000081f5ac40>] do_one_initcall+0xd0/0x4f0
    [<00000000e26d04ee>] do_init_module+0x1a4/0x680
    [<000000001bb22407>] load_module+0x6249/0x7110
    [<00000000ad31ac4d>] __do_sys_finit_module+0x140/0x200
    [<000000007bddca46>] do_syscall_64+0x35/0x80
    [<00000000b5afec39>] entry_SYSCALL_64_after_hwframe+0x46/0xb0

If the floppy_alloc_disk() failed, disks of current drive will not be set,
thus the lastest allocated set->tag cannot be freed in the error handling
path. A simple call graph shown as below:

 floppy_module_init()
   floppy_init()
     do_floppy_init()
       for (drive = 0; drive < N_DRIVE; drive++)
         blk_mq_alloc_tag_set()
           blk_mq_alloc_tag_set_tags()
             blk_mq_realloc_tag_set_tags() # set->tag allocated
         floppy_alloc_disk()
           blk_mq_alloc_disk() # error occurred, disks failed to allocated

       ->out_put_disk:
       for (drive = 0; drive < N_DRIVE; drive++)
         if (!disks[drive][0]) # the last disks is not set and loop break
           break;
         blk_mq_free_tag_set() # the latest allocated set->tag leaked

Fix this problem by free the set->tag of current drive before jump to
error handling path.

[efremov: added stable list, changed title]
Affected products: vendor: Linux
product: Linux
default_status: unaffected
vendor: Linux
product: Linux
default_status: affected
Published: 2025-09-16T16:11:21.665Z