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CVE PROGRAM SOURCE RECORDUnscored

CVE-2022-50434

blk-mq: fix possible memleak when register 'hctx' failed

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix possible memleak when register 'hctx' failed There's issue as follows when do fault injection test: unreferenced object 0xffff888132a9f400 (size 512): comm "insmod", pid 308021, jiffies 4324277909 (age 509.733s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 08 f4 a9 32 81 88 ff ff ...........2.... 08 f4 a9 32 81 88 ff ff 00 00 00 00 00 00 00 00 ...2............ backtrace: [<00000000e8952bb4>] kmalloc_node_trace+0x22/0xa0 [<00000000f9980e0f>] blk_mq_alloc_and_init_hctx+0x3f1/0x7e0 [<000000002e719efa>] blk_mq_realloc_hw_ctxs+0x1e6/0x230 [<000000004f1fda40>] blk_mq_init_allocated_queue+0x27e/0x910 [<00000000287123ec>] __blk_mq_alloc_disk+0x67/0xf0 [<00000000a2a34657>] 0xffffffffa2ad310f [<00000000b173f718>] 0xffffffffa2af824a [<0000000095a1dabb>] do_one_initcall+0x87/0x2a0 [<00000000f32fdf93>] do_init_module+0xdf/0x320 [<00000000cbe8541e>] load_module+0x3006/0x3390 [<0000000069ed1bdb>] __do_sys_finit_module+0x113/0x1b0 [<00000000a1a29ae8>] do_syscall_64+0x35/0x80 [<000000009cd878b0>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 Fault injection context as follows: kobject_add blk_mq_register_hctx blk_mq_sysfs_register blk_register_queue device_add_disk null_add_dev.part.0 [null_blk] As 'blk_mq_register_hctx' may already add some objects when failed halfway, but there isn't do fallback, caller don't know which objects add failed. To solve above issue just do fallback when add objects failed halfway in 'blk_mq_register_hctx'.

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

  • 67aec14ce87fe25bdfff7dbf468556333df11c4e to < 654870789c3c1b9763316ef1c71d7a449127b175affected
  • 67aec14ce87fe25bdfff7dbf468556333df11c4e to < cb186eb47fb9dd327bdefa15f0c5fc55c53a40ddaffected
  • 67aec14ce87fe25bdfff7dbf468556333df11c4e to < 02bc8bc6eab03c84373281b85cb6e98747172ff7affected
  • 67aec14ce87fe25bdfff7dbf468556333df11c4e to < 87fd18016a47ea8ae12641377a390172c4aa97a7affected
  • 67aec14ce87fe25bdfff7dbf468556333df11c4e to < e8022da1fa2fdf2fa204b445dd3354e7a66d085aaffected
  • 67aec14ce87fe25bdfff7dbf468556333df11c4e to < eff45bfbc25a2509a6362dea6e699e14083c693caffected
  • 67aec14ce87fe25bdfff7dbf468556333df11c4e to < 4b7fafa5f39b15c3a6ca3b95e534d05d6904cc95affected
  • 67aec14ce87fe25bdfff7dbf468556333df11c4e to < 33e8a3f61814ea30615d0fafaf50477975d6c1caaffected
  • 67aec14ce87fe25bdfff7dbf468556333df11c4e to < 4b7a21c57b14fbcd0e1729150189e5933f5088e9affected

Linux Linux

Default version status: affected

  • 3.16affected
  • 0 to < 3.16unaffected
  • 4.9.337 to ≤ 4.9.*unaffected
  • 4.14.303 to ≤ 4.14.*unaffected
  • 4.19.270 to ≤ 4.19.*unaffected
  • 5.4.229 to ≤ 5.4.*unaffected
  • 5.10.163 to ≤ 5.10.*unaffected
  • 5.15.86 to ≤ 5.15.*unaffected
  • 6.0.16 to ≤ 6.0.*unaffected
  • 6.1.2 to ≤ 6.1.*unaffected
  • 6.2 to ≤ *unaffected

References