Linux: >> Linux Kernel >> 2.6.33.12 Security Vulnerabilities
In the Linux kernel, the following vulnerability has been resolved:
x86/i8259: Mark legacy PIC interrupts with IRQ_LEVEL
Baoquan reported that after triggering a crash the subsequent crash-kernel
fails to boot about half of the time. It triggers a NULL pointer
dereference in the periodic tick code.
This happens because the legacy timer interrupt (IRQ0) is resent in
software which happens in soft interrupt (tasklet) context. In this context
get_irq_regs() returns NULL which leads to the NULL pointer dereference.
The reason for the resend is a spurious APIC interrupt on the IRQ0 vector
which is captured and leads to a resend when the legacy timer interrupt is
enabled. This is wrong because the legacy PIC interrupts are level
triggered and therefore should never be resent in software, but nothing
ever sets the IRQ_LEVEL flag on those interrupts, so the core code does not
know about their trigger type.
Ensure that IRQ_LEVEL is set when the legacy PCI interrupts are set up.
CVSS Score
5.5
EPSS Score
0.0
Published
2025-03-27
In the Linux kernel, the following vulnerability has been resolved:
scsi: iscsi_tcp: Fix UAF during login when accessing the shost ipaddress
If during iscsi_sw_tcp_session_create() iscsi_tcp_r2tpool_alloc() fails,
userspace could be accessing the host's ipaddress attr. If we then free the
session via iscsi_session_teardown() while userspace is still accessing the
session we will hit a use after free bug.
Set the tcp_sw_host->session after we have completed session creation and
can no longer fail.
CVSS Score
7.8
EPSS Score
0.0
Published
2025-03-27
In the Linux kernel, the following vulnerability has been resolved:
scsi: iscsi_tcp: Fix UAF during logout when accessing the shost ipaddress
Bug report and analysis from Ding Hui.
During iSCSI session logout, if another task accesses the shost ipaddress
attr, we can get a KASAN UAF report like this:
[ 276.942144] BUG: KASAN: use-after-free in _raw_spin_lock_bh+0x78/0xe0
[ 276.942535] Write of size 4 at addr ffff8881053b45b8 by task cat/4088
[ 276.943511] CPU: 2 PID: 4088 Comm: cat Tainted: G E 6.1.0-rc8+ #3
[ 276.943997] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020
[ 276.944470] Call Trace:
[ 276.944943] <TASK>
[ 276.945397] dump_stack_lvl+0x34/0x48
[ 276.945887] print_address_description.constprop.0+0x86/0x1e7
[ 276.946421] print_report+0x36/0x4f
[ 276.947358] kasan_report+0xad/0x130
[ 276.948234] kasan_check_range+0x35/0x1c0
[ 276.948674] _raw_spin_lock_bh+0x78/0xe0
[ 276.949989] iscsi_sw_tcp_host_get_param+0xad/0x2e0 [iscsi_tcp]
[ 276.951765] show_host_param_ISCSI_HOST_PARAM_IPADDRESS+0xe9/0x130 [scsi_transport_iscsi]
[ 276.952185] dev_attr_show+0x3f/0x80
[ 276.953005] sysfs_kf_seq_show+0x1fb/0x3e0
[ 276.953401] seq_read_iter+0x402/0x1020
[ 276.954260] vfs_read+0x532/0x7b0
[ 276.955113] ksys_read+0xed/0x1c0
[ 276.955952] do_syscall_64+0x38/0x90
[ 276.956347] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 276.956769] RIP: 0033:0x7f5d3a679222
[ 276.957161] Code: c0 e9 b2 fe ff ff 50 48 8d 3d 32 c0 0b 00 e8 a5 fe 01 00 0f 1f 44 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48 83 ec 28 48 89 54 24
[ 276.958009] RSP: 002b:00007ffc864d16a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
[ 276.958431] RAX: ffffffffffffffda RBX: 0000000000020000 RCX: 00007f5d3a679222
[ 276.958857] RDX: 0000000000020000 RSI: 00007f5d3a4fe000 RDI: 0000000000000003
[ 276.959281] RBP: 00007f5d3a4fe000 R08: 00000000ffffffff R09: 0000000000000000
[ 276.959682] R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000020000
[ 276.960126] R13: 0000000000000003 R14: 0000000000000000 R15: 0000557a26dada58
[ 276.960536] </TASK>
[ 276.961357] Allocated by task 2209:
[ 276.961756] kasan_save_stack+0x1e/0x40
[ 276.962170] kasan_set_track+0x21/0x30
[ 276.962557] __kasan_kmalloc+0x7e/0x90
[ 276.962923] __kmalloc+0x5b/0x140
[ 276.963308] iscsi_alloc_session+0x28/0x840 [scsi_transport_iscsi]
[ 276.963712] iscsi_session_setup+0xda/0xba0 [libiscsi]
[ 276.964078] iscsi_sw_tcp_session_create+0x1fd/0x330 [iscsi_tcp]
[ 276.964431] iscsi_if_create_session.isra.0+0x50/0x260 [scsi_transport_iscsi]
[ 276.964793] iscsi_if_recv_msg+0xc5a/0x2660 [scsi_transport_iscsi]
[ 276.965153] iscsi_if_rx+0x198/0x4b0 [scsi_transport_iscsi]
[ 276.965546] netlink_unicast+0x4d5/0x7b0
[ 276.965905] netlink_sendmsg+0x78d/0xc30
[ 276.966236] sock_sendmsg+0xe5/0x120
[ 276.966576] ____sys_sendmsg+0x5fe/0x860
[ 276.966923] ___sys_sendmsg+0xe0/0x170
[ 276.967300] __sys_sendmsg+0xc8/0x170
[ 276.967666] do_syscall_64+0x38/0x90
[ 276.968028] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 276.968773] Freed by task 2209:
[ 276.969111] kasan_save_stack+0x1e/0x40
[ 276.969449] kasan_set_track+0x21/0x30
[ 276.969789] kasan_save_free_info+0x2a/0x50
[ 276.970146] __kasan_slab_free+0x106/0x190
[ 276.970470] __kmem_cache_free+0x133/0x270
[ 276.970816] device_release+0x98/0x210
[ 276.971145] kobject_cleanup+0x101/0x360
[ 276.971462] iscsi_session_teardown+0x3fb/0x530 [libiscsi]
[ 276.971775] iscsi_sw_tcp_session_destroy+0xd8/0x130 [iscsi_tcp]
[ 276.972143] iscsi_if_recv_msg+0x1bf1/0x2660 [scsi_transport_iscsi]
[ 276.972485] iscsi_if_rx+0x198/0x4b0 [scsi_transport_iscsi]
[ 276.972808] netlink_unicast+0x4d5/0x7b0
[ 276.973201] netlink_sendmsg+0x78d/0xc30
[ 276.973544] sock_sendmsg+0xe5/0x120
[ 276.973864] ____sys_sendmsg+0x5fe/0x860
[ 276.974248] ___sys_
---truncated---
CVSS Score
7.8
EPSS Score
0.0
Published
2025-03-27
In the Linux kernel, the following vulnerability has been resolved:
kernel/irq/irqdomain.c: fix memory leak with using debugfs_lookup()
When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time. To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic
at once.
CVSS Score
5.5
EPSS Score
0.0
Published
2025-03-27
In the Linux kernel, the following vulnerability has been resolved:
mm/swapfile: add cond_resched() in get_swap_pages()
The softlockup still occurs in get_swap_pages() under memory pressure. 64
CPU cores, 64GB memory, and 28 zram devices, the disksize of each zram
device is 50MB with same priority as si. Use the stress-ng tool to
increase memory pressure, causing the system to oom frequently.
The plist_for_each_entry_safe() loops in get_swap_pages() could reach tens
of thousands of times to find available space (extreme case:
cond_resched() is not called in scan_swap_map_slots()). Let's add
cond_resched() into get_swap_pages() when failed to find available space
to avoid softlockup.
CVSS Score
5.5
EPSS Score
0.0
Published
2025-03-27
In the Linux kernel, the following vulnerability has been resolved:
btrfs: always report error in run_one_delayed_ref()
Currently we have a btrfs_debug() for run_one_delayed_ref() failure, but
if end users hit such problem, there will be no chance that
btrfs_debug() is enabled. This can lead to very little useful info for
debugging.
This patch will:
- Add extra info for error reporting
Including:
* logical bytenr
* num_bytes
* type
* action
* ref_mod
- Replace the btrfs_debug() with btrfs_err()
- Move the error reporting into run_one_delayed_ref()
This is to avoid use-after-free, the @node can be freed in the caller.
This error should only be triggered at most once.
As if run_one_delayed_ref() failed, we trigger the error message, then
causing the call chain to error out:
btrfs_run_delayed_refs()
`- btrfs_run_delayed_refs()
`- btrfs_run_delayed_refs_for_head()
`- run_one_delayed_ref()
And we will abort the current transaction in btrfs_run_delayed_refs().
If we have to run delayed refs for the abort transaction,
run_one_delayed_ref() will just cleanup the refs and do nothing, thus no
new error messages would be output.
CVSS Score
7.8
EPSS Score
0.0
Published
2025-03-27
In the Linux kernel, the following vulnerability has been resolved:
dmaengine: imx-sdma: Fix a possible memory leak in sdma_transfer_init
If the function sdma_load_context() fails, the sdma_desc will be
freed, but the allocated desc->bd is forgot to be freed.
We already met the sdma_load_context() failure case and the log as
below:
[ 450.699064] imx-sdma 30bd0000.dma-controller: Timeout waiting for CH0 ready
...
In this case, the desc->bd will not be freed without this change.
CVSS Score
5.5
EPSS Score
0.0
Published
2025-03-27
In the Linux kernel, the following vulnerability has been resolved:
cpufreq: CPPC: Add u64 casts to avoid overflowing
The fields of the _CPC object are unsigned 32-bits values.
To avoid overflows while using _CPC's values, add 'u64' casts.
CVSS Score
5.5
EPSS Score
0.0
Published
2025-03-27
In the Linux kernel, the following vulnerability has been resolved:
w1: fix WARNING after calling w1_process()
I got the following WARNING message while removing driver(ds2482):
------------[ cut here ]------------
do not call blocking ops when !TASK_RUNNING; state=1 set at [<000000002d50bfb6>] w1_process+0x9e/0x1d0 [wire]
WARNING: CPU: 0 PID: 262 at kernel/sched/core.c:9817 __might_sleep+0x98/0xa0
CPU: 0 PID: 262 Comm: w1_bus_master1 Tainted: G N 6.1.0-rc3+ #307
RIP: 0010:__might_sleep+0x98/0xa0
Call Trace:
exit_signals+0x6c/0x550
do_exit+0x2b4/0x17e0
kthread_exit+0x52/0x60
kthread+0x16d/0x1e0
ret_from_fork+0x1f/0x30
The state of task is set to TASK_INTERRUPTIBLE in loop in w1_process(),
set it to TASK_RUNNING when it breaks out of the loop to avoid the
warning.
CVSS Score
5.5
EPSS Score
0.0
Published
2025-03-27
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to do sanity check on i_extra_isize in is_alive()
syzbot found a f2fs bug:
BUG: KASAN: slab-out-of-bounds in data_blkaddr fs/f2fs/f2fs.h:2891 [inline]
BUG: KASAN: slab-out-of-bounds in is_alive fs/f2fs/gc.c:1117 [inline]
BUG: KASAN: slab-out-of-bounds in gc_data_segment fs/f2fs/gc.c:1520 [inline]
BUG: KASAN: slab-out-of-bounds in do_garbage_collect+0x386a/0x3df0 fs/f2fs/gc.c:1734
Read of size 4 at addr ffff888076557568 by task kworker/u4:3/52
CPU: 1 PID: 52 Comm: kworker/u4:3 Not tainted 6.1.0-rc4-syzkaller-00362-gfef7fd48922d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x15e/0x45d mm/kasan/report.c:395
kasan_report+0xbb/0x1f0 mm/kasan/report.c:495
data_blkaddr fs/f2fs/f2fs.h:2891 [inline]
is_alive fs/f2fs/gc.c:1117 [inline]
gc_data_segment fs/f2fs/gc.c:1520 [inline]
do_garbage_collect+0x386a/0x3df0 fs/f2fs/gc.c:1734
f2fs_gc+0x88c/0x20a0 fs/f2fs/gc.c:1831
f2fs_balance_fs+0x544/0x6b0 fs/f2fs/segment.c:410
f2fs_write_inode+0x57e/0xe20 fs/f2fs/inode.c:753
write_inode fs/fs-writeback.c:1440 [inline]
__writeback_single_inode+0xcfc/0x1440 fs/fs-writeback.c:1652
writeback_sb_inodes+0x54d/0xf90 fs/fs-writeback.c:1870
wb_writeback+0x2c5/0xd70 fs/fs-writeback.c:2044
wb_do_writeback fs/fs-writeback.c:2187 [inline]
wb_workfn+0x2dc/0x12f0 fs/fs-writeback.c:2227
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
The root cause is that we forgot to do sanity check on .i_extra_isize
in below path, result in accessing invalid address later, fix it.
- gc_data_segment
- is_alive
- data_blkaddr
- offset_in_addr
CVSS Score
7.1
EPSS Score
0.0
Published
2025-03-27