Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: md: fix resync softlockup when bitmap size is less than array size Is is reported that for dm-raid10, lvextend + lvchange --syncaction will trigger following softlockup: kernel:watchdog: BUG: soft lockup - CPU#3 stuck for 26s! [mdX_resync:6976] CPU: 7 PID: 3588 Comm: mdX_resync Kdump: loaded Not tainted 6.9.0-rc4-next-20240419 #1 RIP: 0010:_raw_spin_unlock_irq+0x13/0x30 Call Trace: <TASK> md_bitmap_start_sync+0x6b/0xf0 raid10_sync_request+0x25c/0x1b40 [raid10] md_do_sync+0x64b/0x1020 md_thread+0xa7/0x170 kthread+0xcf/0x100 ret_from_fork+0x30/0x50 ret_from_fork_asm+0x1a/0x30 And the detailed process is as follows: md_do_sync j = mddev->resync_min while (j < max_sectors) sectors = raid10_sync_request(mddev, j, &skipped) if (!md_bitmap_start_sync(..., &sync_blocks)) // md_bitmap_start_sync set sync_blocks to 0 return sync_blocks + sectors_skippe; // sectors = 0; j += sectors; // j never change Root cause is that commit 301867b1c168 ("md/raid10: check slab-out-of-bounds in md_bitmap_get_counter") return early from md_bitmap_get_counter(), without setting returned blocks. Fix this problem by always set returned blocks from md_bitmap_get_counter"(), as it used to be. Noted that this patch just fix the softlockup problem in kernel, the case that bitmap size doesn't match array size still need to be fixed.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 374fb914304d9b500721007f3837ea8f1f9a2418 before d4b9c764d48fa41caa24cfb4275f3aa9fb4bd798; affected b0b971fe7d61411ede63c3291764dbde1577ef2c before 43771597feba89a839c5f893716df88ae5c237ce; affected 39fa14e824acfd470db4f42c354297456bd82b53 before 3f5b73ef8fd6268cbc968b308d8eafe56fda97f3; affected a134dd582c0d5b6068efa308bd485cf1d00b3f65 before 69296914bfd508c85935bf5f711cad9b0fe78492; affected be1a3ec63a840cc9e59a033acf154f56255699a1 before 71e8e4f288e74a896b6d9cd194f3bab12bd7a10f; affected 301867b1c16805aebbc306aafa6ecdc68b73c7e5 before c9566b812c8f66160466cc1e29df6d3646add0b1; affected 301867b1c16805aebbc306aafa6ecdc68b73c7e5 before 5817f43ae1a118855676f57ef7ab50e37eac7482; affected 301867b1c16805aebbc306aafa6ecdc68b73c7e5 before 8bbc71315e0ae4bb7e37f8d43b915e1cb01a481b; affected 301867b1c16805aebbc306aafa6ecdc68b73c7e5 before f0e729af2eb6bee9eb58c4df1087f14ebaefe26b; affected 152bb26796ff054af50b2ee1b3ca56e364e4f61b; affected bea301c046110bf421a3ce153fb868cb8d618e90; affected 4.19.291 before 4.19.316; affected 5.4.251 before 5.4.278; affected 5.10.188 before 5.10.219; affected 5.15.121 before 5.15.161; affected 6.1.39 before 6.1.93; affected 6.3.13 before 6.4; affected 6.4.4 before 6.5 |
| Linux / Linux | affected 6.5; unaffected 0 before 6.5; unaffected 4.19.316 through 4.19.*; unaffected 5.4.278 through 5.4.*; unaffected 5.10.219 through 5.10.*; unaffected 5.15.161 through 5.15.*; unaffected 6.1.93 through 6.1.*; unaffected 6.6.33 through 6.6.*; unaffected 6.8.12 through 6.8.*; unaffected 6.9.3 through 6.9.*; unaffected 6.10 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d4b9c764d48fa41caa24cfb4275f3aa9fb4bd798
- https://git.kernel.org/stable/c/43771597feba89a839c5f893716df88ae5c237ce
- https://git.kernel.org/stable/c/3f5b73ef8fd6268cbc968b308d8eafe56fda97f3
- https://git.kernel.org/stable/c/69296914bfd508c85935bf5f711cad9b0fe78492
- https://git.kernel.org/stable/c/71e8e4f288e74a896b6d9cd194f3bab12bd7a10f
- https://git.kernel.org/stable/c/c9566b812c8f66160466cc1e29df6d3646add0b1
- https://git.kernel.org/stable/c/5817f43ae1a118855676f57ef7ab50e37eac7482
- https://git.kernel.org/stable/c/8bbc71315e0ae4bb7e37f8d43b915e1cb01a481b
- https://git.kernel.org/stable/c/f0e729af2eb6bee9eb58c4df1087f14ebaefe26b
ADP enrichment
No English description supplied.
- https://git.kernel.org/stable/c/d4b9c764d48fa41caa24cfb4275f3aa9fb4bd798
- https://git.kernel.org/stable/c/43771597feba89a839c5f893716df88ae5c237ce
- https://git.kernel.org/stable/c/3f5b73ef8fd6268cbc968b308d8eafe56fda97f3
- https://git.kernel.org/stable/c/69296914bfd508c85935bf5f711cad9b0fe78492
- https://git.kernel.org/stable/c/71e8e4f288e74a896b6d9cd194f3bab12bd7a10f
- https://git.kernel.org/stable/c/c9566b812c8f66160466cc1e29df6d3646add0b1
- https://git.kernel.org/stable/c/5817f43ae1a118855676f57ef7ab50e37eac7482
- https://git.kernel.org/stable/c/8bbc71315e0ae4bb7e37f8d43b915e1cb01a481b
- https://git.kernel.org/stable/c/f0e729af2eb6bee9eb58c4df1087f14ebaefe26b
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
No English description supplied.
No references supplied.
No English description supplied.