CVE-2024-56585
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-56585
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-56585.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-56585
- Downstream
- Related
- Published
- 2024-12-27T14:50:53Z
- Modified
- 2025-10-15T20:07:17.444356Z
- Summary
- LoongArch: Fix sleeping in atomic context for PREEMPT_RT
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
LoongArch: Fix sleeping in atomic context for PREEMPT_RT
Commit bab1c299f3945ffe79 ("LoongArch: Fix sleeping in atomic context in setuptlbhandler()") changes the gfp flag from GFPKERNEL to GFPATOMIC for allocpagesnode(). However, for PREEMPT_RT kernels we can still get a "sleeping in atomic context" error:
[ 0.372259] BUG: sleeping function called from invalid context at kernel/locking/spinlockrt.c:48 [ 0.372266] inatomic(): 1, irqsdisabled(): 1, nonblock: 0, pid: 0, name: swapper/1 [ 0.372268] preemptcount: 1, expected: 0 [ 0.372270] RCU nest depth: 1, expected: 1 [ 0.372272] 3 locks held by swapper/1/0: [ 0.372274] #0: 900000000c9f5e60 (&pcp->lock){+.+.}-{3:3}, at: getpagefromfreelist+0x524/0x1c60 [ 0.372294] #1: 90000000087013b8 (rcureadlock){....}-{1:3}, at: rtspintrylock+0x50/0x140 [ 0.372305] #2: 900000047fffd388 (&zone->lock){+.+.}-{3:3}, at: _rmqueuepcplist+0x30c/0xea0 [ 0.372314] irq event stamp: 0 [ 0.372316] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [ 0.372322] hardirqs last disabled at (0): [<9000000005947320>] copyprocess+0x9c0/0x26e0 [ 0.372329] softirqs last enabled at (0): [<9000000005947320>] copyprocess+0x9c0/0x26e0 [ 0.372335] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 0.372341] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.12.0-rc7+ #1891 [ 0.372346] Hardware name: Loongson Loongson-3A5000-7A1000-1w-CRB/Loongson-LS3A5000-7A1000-1w-CRB, BIOS vUDK2018-LoongArch-V2.0.0-prebeta9 10/21/2022 [ 0.372349] Stack : 0000000000000089 9000000005a0db9c 90000000071519c8 9000000100388000 [ 0.372486] 900000010038b890 0000000000000000 900000010038b898 9000000007e53788 [ 0.372492] 900000000815bcc8 900000000815bcc0 900000010038b700 0000000000000001 [ 0.372498] 0000000000000001 4b031894b9d6b725 00000000055ec000 9000000100338fc0 [ 0.372503] 00000000000000c4 0000000000000001 000000000000002d 0000000000000003 [ 0.372509] 0000000000000030 0000000000000003 00000000055ec000 0000000000000003 [ 0.372515] 900000000806d000 9000000007e53788 00000000000000b0 0000000000000004 [ 0.372521] 0000000000000000 0000000000000000 900000000c9f5f10 0000000000000000 [ 0.372526] 90000000076f12d8 9000000007e53788 9000000005924778 0000000000000000 [ 0.372532] 00000000000000b0 0000000000000004 0000000000000000 0000000000070000 [ 0.372537] ... [ 0.372540] Call Trace: [ 0.372542] [<9000000005924778>] showstack+0x38/0x180 [ 0.372548] [<90000000071519c4>] dumpstacklvl+0x94/0xe4 [ 0.372555] [<900000000599b880>] _mightresched+0x1a0/0x260 [ 0.372561] [<90000000071675cc>] rtspinlock+0x4c/0x140 [ 0.372565] [<9000000005cbb768>] _rmqueuepcplist+0x308/0xea0 [ 0.372570] [<9000000005cbed84>] getpagefromfreelist+0x564/0x1c60 [ 0.372575] [<9000000005cc0d98>] _allocpagesnoprof+0x218/0x1820 [ 0.372580] [<900000000593b36c>] tlbinit+0x1ac/0x298 [ 0.372585] [<9000000005924b74>] percputrapinit+0x114/0x140 [ 0.372589] [<9000000005921964>] cpuprobe+0x4e4/0xa60 [ 0.372592] [<9000000005934874>] startsecondary+0x34/0xc0 [ 0.372599] [<900000000715615c>] smpbootentry+0x64/0x6c
This is because in PREEMPTRT kernels normal spinlocks are replaced by rt spinlocks and rtspinlock() will cause sleeping. Fix it by disabling NUMA optimization completely for PREEMPTRT kernels.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/08715b741f9b2a925d6485491e4907f3b29bac70
- https://git.kernel.org/stable/c/6575e0867bd478a5d7ef1783ca1e73160807d238
- https://git.kernel.org/stable/c/88fd2b70120d52c1010257d36776876941375490
- https://git.kernel.org/stable/c/c5f89458a2ea0800866b9fc690d3fa8367dc8f8d
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfa96b57c149061f71a70bd6582d995f6424fbbf4Fixed08715b741f9b2a925d6485491e4907f3b29bac70
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfa96b57c149061f71a70bd6582d995f6424fbbf4Fixedc5f89458a2ea0800866b9fc690d3fa8367dc8f8d
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfa96b57c149061f71a70bd6582d995f6424fbbf4Fixed6575e0867bd478a5d7ef1783ca1e73160807d238
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfa96b57c149061f71a70bd6582d995f6424fbbf4Fixed88fd2b70120d52c1010257d36776876941375490