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CVE PROGRAM SOURCE RECORDUnscored

CVE-2023-53151

md/raid10: prevent soft lockup while flush writes

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: md/raid10: prevent soft lockup while flush writes Currently, there is no limit for raid1/raid10 plugged bio. While flushing writes, raid1 has cond_resched() while raid10 doesn't, and too many writes can cause soft lockup. Follow up soft lockup can be triggered easily with writeback test for raid10 with ramdisks: watchdog: BUG: soft lockup - CPU#10 stuck for 27s! [md0_raid10:1293] Call Trace: <TASK> call_rcu+0x16/0x20 put_object+0x41/0x80 __delete_object+0x50/0x90 delete_object_full+0x2b/0x40 kmemleak_free+0x46/0xa0 slab_free_freelist_hook.constprop.0+0xed/0x1a0 kmem_cache_free+0xfd/0x300 mempool_free_slab+0x1f/0x30 mempool_free+0x3a/0x100 bio_free+0x59/0x80 bio_put+0xcf/0x2c0 free_r10bio+0xbf/0xf0 raid_end_bio_io+0x78/0xb0 one_write_done+0x8a/0xa0 raid10_end_write_request+0x1b4/0x430 bio_endio+0x175/0x320 brd_submit_bio+0x3b9/0x9b7 [brd] __submit_bio+0x69/0xe0 submit_bio_noacct_nocheck+0x1e6/0x5a0 submit_bio_noacct+0x38c/0x7e0 flush_pending_writes+0xf0/0x240 raid10d+0xac/0x1ed0 Fix the problem by adding cond_resched() to raid10 like what raid1 did. Note that unlimited plugged bio still need to be optimized, for example, in the case of lots of dirty pages writeback, this will take lots of memory and io will spend a long time in plug, hence io latency is bad.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 6cce3b23f6f8e974c00af7a9b88f1d413ba368a8 to < f45b2fa7678ab385299de345f7e85d05caea386baffected
  • 6cce3b23f6f8e974c00af7a9b88f1d413ba368a8 to < 00ecb6fa67c0f772290c5ea5ae8b46eefd503b83affected
  • 6cce3b23f6f8e974c00af7a9b88f1d413ba368a8 to < d0345f7c7dbc5d42e4e6f1db99c1c1879d7b0eb5affected
  • 6cce3b23f6f8e974c00af7a9b88f1d413ba368a8 to < 634daf6b2c81015cc5e28bf694a6a94a50c641cdaffected
  • 6cce3b23f6f8e974c00af7a9b88f1d413ba368a8 to < 84a578961b2566e475bfa8740beaf0abcc781a6faffected
  • 6cce3b23f6f8e974c00af7a9b88f1d413ba368a8 to < 1d467e10507167eb6dc2c281a87675b731955d86affected
  • 6cce3b23f6f8e974c00af7a9b88f1d413ba368a8 to < fbf50184190d55f8717bd29aa9530c399be96f30affected
  • 6cce3b23f6f8e974c00af7a9b88f1d413ba368a8 to < 010444623e7f4da6b4a4dd603a7da7469981e293affected

Linux Linux

Default version status: affected

  • 2.6.16affected
  • 0 to < 2.6.16unaffected
  • 4.14.322 to ≤ 4.14.*unaffected
  • 4.19.291 to ≤ 4.19.*unaffected
  • 5.4.251 to ≤ 5.4.*unaffected
  • 5.10.188 to ≤ 5.10.*unaffected
  • 5.15.150 to ≤ 5.15.*unaffected
  • 6.1.83 to ≤ 6.1.*unaffected
  • 6.4.7 to ≤ 6.4.*unaffected
  • 6.5 to ≤ *unaffected

References