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CVE PROGRAM SOURCE RECORDUnscored

CVE-2023-53847

usb-storage: alauda: Fix uninit-value in alauda_check_media()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: usb-storage: alauda: Fix uninit-value in alauda_check_media() Syzbot got KMSAN to complain about access to an uninitialized value in the alauda subdriver of usb-storage: BUG: KMSAN: uninit-value in alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1137 CPU: 0 PID: 12279 Comm: usb-storage Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250 alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:460 The problem is that alauda_check_media() doesn't verify that its USB transfer succeeded before trying to use the received data. What should happen if the transfer fails isn't entirely clear, but a reasonably conservative approach is to pretend that no media is present. A similar problem exists in a usb_stor_dbg() call in alauda_get_media_status(). In this case, when an error occurs the call is redundant, because usb_stor_ctrl_transfer() already will print a debugging message. Finally, unrelated to the uninitialized memory access, is the fact that alauda_check_media() performs DMA to a buffer on the stack. Fortunately usb-storage provides a general purpose DMA-able buffer for uses like this. We'll use it instead.

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

  • e80b0fade09ef1ee67b0898d480d4c588f124d5f to < 153c3e85873cc3e2f387169783c3a227bad9a95aaffected
  • e80b0fade09ef1ee67b0898d480d4c588f124d5f to < 49d380bcd6cba987c6085fae6464c9c087e8d9a0affected
  • e80b0fade09ef1ee67b0898d480d4c588f124d5f to < 044f4446e06bb03c52216697b14867ebc555ad3baffected
  • e80b0fade09ef1ee67b0898d480d4c588f124d5f to < fe7c3a445d22783d27fe8bd0521a8aab1eb9da65affected
  • e80b0fade09ef1ee67b0898d480d4c588f124d5f to < 7a11d1e2625bdb2346f6586773b20b20977278acaffected
  • e80b0fade09ef1ee67b0898d480d4c588f124d5f to < 0d2d5282d39aed6f27dfe1ed60a5f3934ebd21cdaffected
  • e80b0fade09ef1ee67b0898d480d4c588f124d5f to < 373e0ab8c4c516561493f1acf367c7ee7dc053c2affected
  • e80b0fade09ef1ee67b0898d480d4c588f124d5f to < a6ff6e7a9dd69364547751db0f626a10a6d628d2affected

Linux Linux

Default version status: affected

  • 2.6.16affected
  • 0 to < 2.6.16unaffected
  • 4.14.323 to ≤ 4.14.*unaffected
  • 4.19.292 to ≤ 4.19.*unaffected
  • 5.4.254 to ≤ 5.4.*unaffected
  • 5.10.191 to ≤ 5.10.*unaffected
  • 5.15.127 to ≤ 5.15.*unaffected
  • 6.1.46 to ≤ 6.1.*unaffected
  • 6.4.11 to ≤ 6.4.*unaffected
  • 6.5 to ≤ *unaffected

References