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CVE-2024-42253

gpio: pca953x: fix pca953x_irq_bus_sync_unlock race PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: gpio: pca953x: fix pca953x_irq_bus_sync_unlock race Ensure that `i2c_lock' is held when setting interrupt latch and mask in pca953x_irq_bus_sync_unlock() in order to avoid races. The other (non-probe) call site pca953x_gpio_set_multiple() ensures the lock is held before calling pca953x_write_regs(). The problem occurred when a request raced against irq_bus_sync_unlock() approximately once per thousand reboots on an i.MX8MP based system. * Normal case 0-0022: write register AI|3a {03,02,00,00,01} Input latch P0 0-0022: write register AI|49 {fc,fd,ff,ff,fe} Interrupt mask P0 0-0022: write register AI|08 {ff,00,00,00,00} Output P3 0-0022: write register AI|12 {fc,00,00,00,00} Config P3 * Race case 0-0022: write register AI|08 {ff,00,00,00,00} Output P3 0-0022: write register AI|08 {03,02,00,00,01} *** Wrong register *** 0-0022: write register AI|12 {fc,00,00,00,00} Config P3 0-0022: write register AI|49 {fc,fd,ff,ff,fe} Interrupt mask P0

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 44896beae605b93f2232301befccb7ef42953198 before 58a5c93bd1a6e949267400080f07e57ffe05ec34; affected 44896beae605b93f2232301befccb7ef42953198 before e2ecdddca80dd845df42376e4b0197fe97018ba2; affected 44896beae605b93f2232301befccb7ef42953198 before de7cffa53149c7b48bd1bb29b02390c9f05b7f41; affected 44896beae605b93f2232301befccb7ef42953198 before bfc6444b57dc7186b6acc964705d7516cbaf3904
Linux / Linuxaffected 4.7; unaffected 0 before 4.7; unaffected 6.1.101 through 6.1.*; unaffected 6.6.42 through 6.6.*; unaffected 6.9.11 through 6.9.*; unaffected 6.10 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

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CVE

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