CVE-2025-37928
dm-bufio: don't schedule in atomic context
Reported by linux · Published May 20, 2025
In the Linux kernel, the following vulnerability has been resolved: dm-bufio: don't schedule in atomic context A BUG was reported as below when CONFIG_DEBUG_ATOMIC_SLEEP and try_verify_in_tasklet are enabled. [ 129.444685][ T934] BUG: sleeping function called from invalid context at drivers/md/dm-bufio.c:2421 [ 129.444723][ T934] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 934, name: kworker/1:4 [ 129.444740][ T934] preempt_count: 201, expected: 0 [ 129.444756][ T934] RCU nest depth: 0, expected: 0 [ 129.444781][ T934] Preemption disabled at: [ 129.444789][ T934] [<ffffffd816231900>] shrink_work+0x21c/0x248 [ 129.445167][ T934] kernel BUG at kernel/sched/walt/walt_debug.c:16! [ 129.445183][ T934] Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP [ 129.445204][ T934] Skip md ftrace buffer dump for: 0x1609e0 [ 129.447348][ T934] CPU: 1 PID: 934 Comm: kworker/1:4 Tainted: G W OE 6.6.56-android15-8-o-g6f82312b30b9-debug #1 1400000003000000474e5500b3187743670464e8 [ 129.447362][ T934] Hardware name: Qualcomm Technologies, Inc. Parrot QRD, Alpha-M (DT) [ 129.447373][ T934] Workqueue: dm_bufio_cache shrink_work [ 129.447394][ T934] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 129.447406][ T934] pc : android_rvh_schedule_bug+0x0/0x8 [sched_walt_debug] [ 129.447435][ T934] lr : __traceiter_android_rvh_schedule_bug+0x44/0x6c [ 129.447451][ T934] sp : ffffffc0843dbc90 [ 129.447459][ T934] x29: ffffffc0843dbc90 x28: ffffffffffffffff x27: 0000000000000c8b [ 129.447479][ T934] x26: 0000000000000040 x25: ffffff804b3d6260 x24: ffffffd816232b68 [ 129.447497][ T934] x23: ffffff805171c5b4 x22: 0000000000000000 x21: ffffffd816231900 [ 129.447517][ T934] x20: ffffff80306ba898 x19: 0000000000000000 x18: ffffffc084159030 [ 129.447535][ T934] x17: 00000000d2b5dd1f x16: 00000000d2b5dd1f x15: ffffffd816720358 [ 129.447554][ T934] x14: 0000000000000004 x13: ffffff89ef978000 x12: 0000000000000003 [ 129.447572][ T934] x11: ffffffd817a823c4 x10: 0000000000000202 x9 : 7e779c5735de9400 [ 129.447591][ T934] x8 : ffffffd81560d004 x7 : 205b5d3938373434 x6 : ffffffd8167397c8 [ 129.447610][ T934] x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffffffc0843db9e0 [ 129.447629][ T934] x2 : 0000000000002f15 x1 : 0000000000000000 x0 : 0000000000000000 [ 129.447647][ T934] Call trace: [ 129.447655][ T934] android_rvh_schedule_bug+0x0/0x8 [sched_walt_debug 1400000003000000474e550080cce8a8a78606b6] [ 129.447681][ T934] __might_resched+0x190/0x1a8 [ 129.447694][ T934] shrink_work+0x180/0x248 [ 129.447706][ T934] process_one_work+0x260/0x624 [ 129.447718][ T934] worker_thread+0x28c/0x454 [ 129.447729][ T934] kthread+0x118/0x158 [ 129.447742][ T934] ret_from_fork+0x10/0x20 [ 129.447761][ T934] Code: ???????? ???????? ???????? d2b5dd1f (d4210000) [ 129.447772][ T934] ---[ end trace 0000000000000000 ]--- dm_bufio_lock will call spin_lock_bh when try_verify_in_tasklet is enabled, and __scan will be called in atomic context.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| bpftool | Amazon Linux | 6.1.140-154.222.amzn2023 |
| kernel-libbpf-static | Amazon Linux | 6.1.140-154.222.amzn2023 |
| kernel-livepatch-6.1.140-154.222 | Amazon Linux | 1.0-0.amzn2023 |
| python3-perf6.12 | Amazon Linux | 6.12.29-33.102.amzn2023 |
| kernel-tools-devel | Amazon Linux | 6.1.140-154.222.amzn2023 |
| kernel | Amazon Linux | 6.1.140-154.222.amzn2023 |
| kernel-tools | Amazon Linux | 6.1.140-154.222.amzn2023 |
| kernel-livepatch-6.12.29-33.102 | Amazon Linux | 1.0-0.amzn2023 |
| kernel-modules-extra-common | Amazon Linux | 6.1.140-154.222.amzn2023 |
| perf | Amazon Linux | 6.1.140-154.222.amzn2023 |
| linux_kernel | linux | 6.14.6, 6.12.28, 6.6.90, 6.1.138 |
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 7cd326747f46ffe1c7bff5682e97dfbcb98990ec, 7cd326747f46ffe1c7bff5682e97dfbcb98990ec, 7cd326747f46ffe1c7bff5682e97dfbcb98990ec |
| Linux | Linux | 4.9, 0, 6.1.138 |
| amazon:2023 | bpftool | 0 |
| amazon:2023 | kernel-libbpf-static | 0 |
| amazon:2023 | kernel-livepatch-6.1.140-154.222 | 0 |
| amazon:2023 | python3-perf6.12 | 0 |
| amazon:2023 | kernel-tools-devel | 0 |
| amazon:2023 | kernel | 0 |
| amazon:2023 | kernel-tools | 0 |
| amazon:2023 | kernel-livepatch-6.12.29-33.102 | 0 |
| amazon:2023 | kernel-modules-extra-common | 0 |
| amazon:2023 | perf | 0 |
| linux | linux_kernel | 4.9, 4.9, 4.9 |
| amazon:2023 | kernel-libbpf | 0 |
| amazon:2023 | perf6.12 | 0 |
| amazon:2023 | kernel-modules-extra | 0 |
| amazon:2023 | kernel6.12 | 0 |
| amazon:2023 | kernel-headers | 0 |
| Linux | Linux | 7cd326747f46ffe1c7bff5682e97dfbcb98990ec, 6.6.90, 6.12.28 |
| amazon:2023 | python3-perf | 0 |
…and 3 more
Timeline
- May 20, 2025 CVE Published
- May 21, 2025 EPSS Score (30 in total, the first dated here)
- Jun 26, 2025 PoC Published (7 in total, the first dated here)
- Mar 29, 2026 Distribution Patch (217 in total, the first dated here)
- Mar 29, 2026 Security Advisory (225 in total, the first dated here)
- May 11, 2026 CVE Updated
- Jun 9, 2026 Coalition ESS Score
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