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CVE PROGRAM SOURCE RECORDUnscored

CVE-2024-40904

USB: class: cdc-wdm: Fix CPU lockup caused by excessive log messages

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: USB: class: cdc-wdm: Fix CPU lockup caused by excessive log messages The syzbot fuzzer found that the interrupt-URB completion callback in the cdc-wdm driver was taking too long, and the driver's immediate resubmission of interrupt URBs with -EPROTO status combined with the dummy-hcd emulation to cause a CPU lockup: cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor782:6625] CPU#0 Utilization every 4s during lockup: #1: 98% system, 0% softirq, 3% hardirq, 0% idle #2: 98% system, 0% softirq, 3% hardirq, 0% idle #3: 98% system, 0% softirq, 3% hardirq, 0% idle #4: 98% system, 0% softirq, 3% hardirq, 0% idle #5: 98% system, 1% softirq, 3% hardirq, 0% idle Modules linked in: irq event stamp: 73096 hardirqs last enabled at (73095): [<ffff80008037bc00>] console_emit_next_record kernel/printk/printk.c:2935 [inline] hardirqs last enabled at (73095): [<ffff80008037bc00>] console_flush_all+0x650/0xb74 kernel/printk/printk.c:2994 hardirqs last disabled at (73096): [<ffff80008af10b00>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] hardirqs last disabled at (73096): [<ffff80008af10b00>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 softirqs last enabled at (73048): [<ffff8000801ea530>] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (73048): [<ffff8000801ea530>] handle_softirqs+0xa60/0xc34 kernel/softirq.c:582 softirqs last disabled at (73043): [<ffff800080020de8>] __do_softirq+0x14/0x20 kernel/softirq.c:588 CPU: 0 PID: 6625 Comm: syz-executor782 Tainted: G W 6.10.0-rc2-syzkaller-g8867bbd4a056 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Testing showed that the problem did not occur if the two error messages -- the first two lines above -- were removed; apparently adding material to the kernel log takes a surprisingly large amount of time. In any case, the best approach for preventing these lockups and to avoid spamming the log with thousands of error messages per second is to ratelimit the two dev_err() calls. Therefore we replace them with dev_err_ratelimited().

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

  • 9908a32e94de2141463e104c9924279ed3509447 to < 217d1f44fff560b3995a685a60aa66e55a7f0f56affected
  • 9908a32e94de2141463e104c9924279ed3509447 to < 05b2cd6d33f700597e6f081b53c668a226a96d28affected
  • 9908a32e94de2141463e104c9924279ed3509447 to < c0747d76eb05542b5d49f67069b64ef5ff732c6caffected
  • 9908a32e94de2141463e104c9924279ed3509447 to < 53250b54c92fe087fd4b0c48f85529efe1ebd879affected
  • 9908a32e94de2141463e104c9924279ed3509447 to < 02a4c0499fc3a02e992b4c69a9809912af372d94affected
  • 9908a32e94de2141463e104c9924279ed3509447 to < 72a3fe36cf9f0d030865e571f45a40f9c1e07e8aaffected
  • 9908a32e94de2141463e104c9924279ed3509447 to < 82075aff7ffccb1e72b0ac8aa349e473624d857caffected
  • 9908a32e94de2141463e104c9924279ed3509447 to < 22f00812862564b314784167a89f27b444f82a46affected

Linux Linux

Default version status: affected

  • 2.6.28affected
  • 0 to < 2.6.28unaffected
  • 4.19.317 to ≤ 4.19.*unaffected
  • 5.4.279 to ≤ 5.4.*unaffected
  • 5.10.221 to ≤ 5.10.*unaffected
  • 5.15.162 to ≤ 5.15.*unaffected
  • 6.1.95 to ≤ 6.1.*unaffected
  • 6.6.35 to ≤ 6.6.*unaffected
  • 6.9.6 to ≤ 6.9.*unaffected
  • 6.10 to ≤ *unaffected

References