CVE - CVE-2024-38598

CVE-ID
CVE-2024-38598	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/3f5b73ef8fd6268cbc968b308d8eafe56fda97f3 URL:https://git.kernel.org/stable/c/3f5b73ef8fd6268cbc968b308d8eafe56fda97f3 MISC:https://git.kernel.org/stable/c/43771597feba89a839c5f893716df88ae5c237ce URL:https://git.kernel.org/stable/c/43771597feba89a839c5f893716df88ae5c237ce MISC:https://git.kernel.org/stable/c/5817f43ae1a118855676f57ef7ab50e37eac7482 URL:https://git.kernel.org/stable/c/5817f43ae1a118855676f57ef7ab50e37eac7482 MISC:https://git.kernel.org/stable/c/69296914bfd508c85935bf5f711cad9b0fe78492 URL:https://git.kernel.org/stable/c/69296914bfd508c85935bf5f711cad9b0fe78492 MISC:https://git.kernel.org/stable/c/71e8e4f288e74a896b6d9cd194f3bab12bd7a10f URL:https://git.kernel.org/stable/c/71e8e4f288e74a896b6d9cd194f3bab12bd7a10f MISC:https://git.kernel.org/stable/c/8bbc71315e0ae4bb7e37f8d43b915e1cb01a481b URL:https://git.kernel.org/stable/c/8bbc71315e0ae4bb7e37f8d43b915e1cb01a481b MISC:https://git.kernel.org/stable/c/c9566b812c8f66160466cc1e29df6d3646add0b1 URL:https://git.kernel.org/stable/c/c9566b812c8f66160466cc1e29df6d3646add0b1 MISC:https://git.kernel.org/stable/c/d4b9c764d48fa41caa24cfb4275f3aa9fb4bd798 URL:https://git.kernel.org/stable/c/d4b9c764d48fa41caa24cfb4275f3aa9fb4bd798 MISC:https://git.kernel.org/stable/c/f0e729af2eb6bee9eb58c4df1087f14ebaefe26b URL:https://git.kernel.org/stable/c/f0e729af2eb6bee9eb58c4df1087f14ebaefe26b
Assigning CNA
kernel.org
Date Record Created
20240618	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240618)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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