CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 0CVE-2024-40998 – ext4: fix uninitialized ratelimit_state->lock access in __ext4_fill_super()
https://notcve.org/view.php?id=CVE-2024-40998
In the Linux kernel, the following vulnerability has been resolved: ext4: fix uninitialized ratelimit_state->lock access in __ext4_fill_super() In the following concurrency we will access the uninitialized rs->lock: ext4_fill_super ext4_register_sysfs // sysfs registered msg_ratelimit_interval_ms // Other processes modify rs->interval to // non-zero via msg_ratelimit_interval_ms ext4_orphan_cleanup ext4_msg(sb, KERN_INFO, "Errors on filesystem, " __ext4_msg ___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state) if (!rs->interval) // do nothing if interval is 0 return 1; raw_spin_trylock_irqsave(&rs->lock, flags) raw_spin_trylock(lock) _raw_spin_trylock __raw_spin_trylock spin_acquire(&lock->dep_map, 0, 1, _RET_IP_) lock_acquire __lock_acquire register_lock_class assign_lock_key dump_stack(); ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); raw_spin_lock_init(&rs->lock); // init rs->lock here and get the following dump_stack: ========================================================= INFO: trying to register non-static key. The code is fine but needs lockdep annotation, or maybe you didn't initialize this object before use? turning off the locking correctness validator. CPU: 12 PID: 753 Comm: mount Tainted: G E 6.7.0-rc6-next-20231222 #504 [...] Call Trace: dump_stack_lvl+0xc5/0x170 dump_stack+0x18/0x30 register_lock_class+0x740/0x7c0 __lock_acquire+0x69/0x13a0 lock_acquire+0x120/0x450 _raw_spin_trylock+0x98/0xd0 ___ratelimit+0xf6/0x220 __ext4_msg+0x7f/0x160 [ext4] ext4_orphan_cleanup+0x665/0x740 [ext4] __ext4_fill_super+0x21ea/0x2b10 [ext4] ext4_fill_super+0x14d/0x360 [ext4] [...] ========================================================= Normally interval is 0 until s_msg_ratelimit_state is initialized, so ___ratelimit() does nothing. But registering sysfs precedes initializing rs->lock, so it is possible to change rs->interval to a non-zero value via the msg_ratelimit_interval_ms interface of sysfs while rs->lock is uninitialized, and then a call to ext4_msg triggers the problem by accessing an uninitialized rs->lock. Therefore register sysfs after all initializations are complete to avoid such problems. • https://git.kernel.org/stable/c/23afcd52af06880c6c913a0ad99022b8937b575c https://git.kernel.org/stable/c/645267906944a9aeec9d5c56ee24a9096a288798 https://git.kernel.org/stable/c/b4b4fda34e535756f9e774fb2d09c4537b7dfd1c https://access.redhat.com/security/cve/CVE-2024-40998 https://bugzilla.redhat.com/show_bug.cgi?id=2297582 •
CVSS: 5.1EPSS: 0%CPEs: 3EXPL: 0CVE-2024-40997 – cpufreq: amd-pstate: fix memory leak on CPU EPP exit
https://notcve.org/view.php?id=CVE-2024-40997
In the Linux kernel, the following vulnerability has been resolved: cpufreq: amd-pstate: fix memory leak on CPU EPP exit The cpudata memory from kzalloc() in amd_pstate_epp_cpu_init() is not freed in the analogous exit function, so fix that. [ rjw: Subject and changelog edits ] • https://git.kernel.org/stable/c/448efb7ea0bfa2c4e27c5a2eb5684fd225cd12cd https://git.kernel.org/stable/c/8015c17fe11a8608cc3eb83d0ab831e1845a9582 https://git.kernel.org/stable/c/cea04f3d9aeebda9d9c063c0dfa71e739c322c81 https://access.redhat.com/security/cve/CVE-2024-40997 https://bugzilla.redhat.com/show_bug.cgi?id=2297581 • CWE-402: Transmission of Private Resources into a New Sphere ('Resource Leak') •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-40996 – bpf: Avoid splat in pskb_pull_reason
https://notcve.org/view.php?id=CVE-2024-40996
In the Linux kernel, the following vulnerability has been resolved: bpf: Avoid splat in pskb_pull_reason syzkaller builds (CONFIG_DEBUG_NET=y) frequently trigger a debug hint in pskb_may_pull. We'd like to retain this debug check because it might hint at integer overflows and other issues (kernel code should pull headers, not huge value). In bpf case, this splat isn't interesting at all: such (nonsensical) bpf programs are typically generated by a fuzzer anyway. Do what Eric suggested and suppress such warning. For CONFIG_DEBUG_NET=n we don't need the extra check because pskb_may_pull will do the right thing: return an error without the WARN() backtrace. • https://git.kernel.org/stable/c/8af60bb2b215f478b886f1d6d302fefa7f0b917d https://git.kernel.org/stable/c/1b2b26595bb09febf14c5444c873ac4ec90a5a77 https://git.kernel.org/stable/c/219eee9c0d16f1b754a8b85275854ab17df0850a https://git.kernel.org/stable/c/fff05b2b004d9a8a2416d08647f3dc9068e357c8 https://git.kernel.org/stable/c/dacc15e9cb248d19e5fc63c54bef0b9b55007761 https://git.kernel.org/stable/c/7f9644782c559635bd676c12c59389a34ed7c866 https://git.kernel.org/stable/c/5e90258303a358e88737afb5048bee9113beea3a https://git.kernel.org/stable/c/2bbe3e5a2f4ef69d13be54f1cf895b465 •
CVSS: 5.5EPSS: 0%CPEs: 7EXPL: 0CVE-2024-40995 – net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc()
https://notcve.org/view.php?id=CVE-2024-40995
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc() syzbot found hanging tasks waiting on rtnl_lock [1] A reproducer is available in the syzbot bug. When a request to add multiple actions with the same index is sent, the second request will block forever on the first request. This holds rtnl_lock, and causes tasks to hang. Return -EAGAIN to prevent infinite looping, while keeping documented behavior. [1] INFO: task kworker/1:0:5088 blocked for more than 143 seconds. Not tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:23744 pid:5088 tgid:5088 ppid:2 flags:0x00004000 Workqueue: events_power_efficient reg_check_chans_work Call Trace: <TASK> context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6838 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 wiphy_lock include/net/cfg80211.h:5953 [inline] reg_leave_invalid_chans net/wireless/reg.c:2466 [inline] reg_check_chans_work+0x10a/0x10e0 net/wireless/reg.c:2481 • https://git.kernel.org/stable/c/0190c1d452a91c38a3462abdd81752be1b9006a8 https://git.kernel.org/stable/c/0d8a2d287c8a394c0d4653f0c6c7be4c688e5a74 https://git.kernel.org/stable/c/c6a7da65a296745535a964be1019ec7691b0cb90 https://git.kernel.org/stable/c/25987a97eec4d5f897cd04ee1b45170829c610da https://git.kernel.org/stable/c/6fc78d67f51aeb9a542d39a8714e16bc411582d4 https://git.kernel.org/stable/c/5f926aa96b08b6c47178fe1171e7ae331c695fc2 https://git.kernel.org/stable/c/7a0e497b597df7c4cf2b63fc6e9188b6cabe5335 https://git.kernel.org/stable/c/d864319871b05fadd153e0aede4811ca7 • CWE-833: Deadlock •
CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-40994 – ptp: fix integer overflow in max_vclocks_store
https://notcve.org/view.php?id=CVE-2024-40994
In the Linux kernel, the following vulnerability has been resolved: ptp: fix integer overflow in max_vclocks_store On 32bit systems, the "4 * max" multiply can overflow. Use kcalloc() to do the allocation to prevent this. • https://git.kernel.org/stable/c/44c494c8e30e35713c7d11ca3c5ab332cbfabacf https://git.kernel.org/stable/c/4b03da87d0b7074c93d9662c6e1a8939f9b8b86e https://git.kernel.org/stable/c/d50d62d5e6ee6aa03c00bddb91745d0b632d3b0f https://git.kernel.org/stable/c/666e934d749e50a37f3796caaf843a605f115b6f https://git.kernel.org/stable/c/e1fccfb4638ee6188377867f6015d0ce35764a8e https://git.kernel.org/stable/c/81d23d2a24012e448f651e007fac2cfd20a45ce0 •