Alexandre Ghiti 45a0de41ec drivers: perf: Check find_first_bit() return value ... commit c6e316ac05532febb0c966fa9b55f5258ed037be upstream. We must check the return value of find_first_bit() before using the return value as an index array since it happens to overflow the array and then panic: [ 107.318430] Kernel BUG [#1] [ 107.319434] CPU: 3 PID: 1238 Comm: kill Tainted: G E 6.6.0-rc6ubuntu-defconfig #2 [ 107.319465] Hardware name: riscv-virtio,qemu (DT) [ 107.319551] epc : pmu_sbi_ovf_handler+0x3a4/0x3ae [ 107.319840] ra : pmu_sbi_ovf_handler+0x52/0x3ae [ 107.319868] epc : ffffffff80a0a77c ra : ffffffff80a0a42a sp : ffffaf83fecda350 [ 107.319884] gp : ffffffff823961a8 tp : ffffaf8083db1dc0 t0 : ffffaf83fecda480 [ 107.319899] t1 : ffffffff80cafe62 t2 : 000000000000ff00 s0 : ffffaf83fecda520 [ 107.319921] s1 : ffffaf83fecda380 a0 : 00000018fca29df0 a1 : ffffffffffffffff [ 107.319936] a2 : 0000000001073734 a3 : 0000000000000004 a4 : 0000000000000000 [ 107.319951] a5 : 0000000000000040 a6 : 000000001d1c8774 a7 : 0000000000504d55 [ 107.319965] s2 : ffffffff82451f10 s3 : ffffffff82724e70 s4 : 000000000000003f [ 107.319980] s5 : 0000000000000011 s6 : ffffaf8083db27c0 s7 : 0000000000000000 [ 107.319995] s8 : 0000000000000001 s9 : 00007fffb45d6558 s10: 00007fffb45d81a0 [ 107.320009] s11: ffffaf7ffff60000 t3 : 0000000000000004 t4 : 0000000000000000 [ 107.320023] t5 : ffffaf7f80000000 t6 : ffffaf8000000000 [ 107.320037] status: 0000000200000100 badaddr: 0000000000000000 cause: 0000000000000003 [ 107.320081] [<ffffffff80a0a77c>] pmu_sbi_ovf_handler+0x3a4/0x3ae [ 107.320112] [<ffffffff800b42d0>] handle_percpu_devid_irq+0x9e/0x1a0 [ 107.320131] [<ffffffff800ad92c>] generic_handle_domain_irq+0x28/0x36 [ 107.320148] [<ffffffff8065f9f8>] riscv_intc_irq+0x36/0x4e [ 107.320166] [<ffffffff80caf4a0>] handle_riscv_irq+0x54/0x86 [ 107.320189] [<ffffffff80cb0036>] do_irq+0x64/0x96 [ 107.320271] Code: 85a6 855e b097 ff7f 80e7 9220 b709 9002 4501 bbd9 (9002) 6097 [ 107.320585] ---[ end trace 0000000000000000 ]--- [ 107.320704] Kernel panic - not syncing: Fatal exception in interrupt [ 107.320775] SMP: stopping secondary CPUs [ 107.321219] Kernel Offset: 0x0 from 0xffffffff80000000 [ 107.333051] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]--- Fixes: 4905ec2fb7 ("RISC-V: Add sscofpmf extension support") Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com> Link: https://lore.kernel.org/r/20231109082128.40777-1-alexghiti@rivosinc.com Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-11-28 17:19:54 +00:00
..
amlogic	drivers/perf: Explicitly include correct DT includes	2023-07-27 13:02:23 +01:00
arm_cspmu	perf: arm_cspmu: Reject events meant for other PMUs	2023-11-28 17:19:54 +00:00
hisilicon	perf: hisi: Fix use-after-free when register pmu fails	2023-11-20 11:59:13 +01:00
Kconfig	perf/smmuv3: Remove build dependency on ACPI	2023-07-27 13:00:49 +01:00
Makefile	cxl for v6.5	2023-07-01 08:58:41 -07:00
alibaba_uncore_drw_pmu.c	driver/perf: Add identifier sysfs file for Yitian 710 DDR	2023-07-27 12:57:04 +01:00
apple_m1_cpu_pmu.c	drivers/perf: apple_m1: Force 63bit counters for M2 CPUs	2023-06-05 15:39:59 +01:00
arm-cci.c	drivers/perf: Explicitly include correct DT includes	2023-07-27 13:02:23 +01:00
arm-ccn.c	drivers/perf:Directly use ida_alloc()/free()	2022-06-23 15:44:45 +01:00
arm-cmn.c	perf/arm-cmn: Fix DTC domain detection	2023-11-20 11:59:13 +01:00
arm_dmc620_pmu.c	perf/arm-dmc620: Fix dmc620_pmu_irqs_lock/cpu_hotplug_lock circular lock dependency	2023-08-16 14:16:03 +01:00
arm_dsu_pmu.c	drivers/perf: Explicitly include correct DT includes	2023-07-27 13:02:23 +01:00
arm_pmu.c	arm_pmu: Remove unused PERF_PMU_CAP_HETEROGENEOUS_CPUS capability	2023-07-26 12:28:47 +02:00
arm_pmu_acpi.c	arm_pmu: acpi: Add a representative platform device for TRBE	2023-08-18 18:07:10 +01:00
arm_pmu_platform.c	drivers/perf: Explicitly include correct DT includes	2023-07-27 13:02:23 +01:00
arm_pmuv3.c	arm64/arm: arm_pmuv3: perf: Don't truncate 64-bit registers	2023-11-20 11:59:38 +01:00
arm_smmuv3_pmu.c	perf/smmuv3: Add MODULE_ALIAS for module auto loading	2023-08-15 12:53:04 +01:00
arm_spe_pmu.c	drivers/perf: Explicitly include correct DT includes	2023-07-27 13:02:23 +01:00
cxl_pmu.c	perf: CXL: fix mismatched number of counters mask	2023-09-05 15:51:18 +01:00
fsl_imx8_ddr_perf.c	perf/imx_ddr: don't enable counter0 if none of 4 counters are used	2023-08-16 14:34:51 +01:00
fsl_imx9_ddr_perf.c	drivers/perf: Explicitly include correct DT includes	2023-07-27 13:02:23 +01:00
marvell_cn10k_ddr_pmu.c	drivers/perf: Explicitly include correct DT includes	2023-07-27 13:02:23 +01:00
marvell_cn10k_tad_pmu.c	drivers/perf: Explicitly include correct DT includes	2023-07-27 13:02:23 +01:00
qcom_l2_pmu.c	perf: qcom_l2_pmu: Make l2_cache_pmu_probe_cluster() more robust	2023-06-05 15:01:27 +01:00
qcom_l3_pmu.c	perf: qcom: Use devm_platform_get_and_ioremap_resource()	2023-03-27 15:03:01 +01:00
riscv_pmu.c	drivers: perf: Fix panic in riscv SBI mmap support	2023-10-12 11:46:35 -07:00
riscv_pmu_legacy.c	drivers: perf: Implement perf event mmap support in the legacy backend	2023-08-16 07:28:19 -07:00
riscv_pmu_sbi.c	drivers: perf: Check find_first_bit() return value	2023-11-28 17:19:54 +00:00
thunderx2_pmu.c	perf: Replace acpi_bus_get_device()	2022-02-08 15:14:53 +00:00
xgene_pmu.c	perf: xgene_pmu: Convert to devm_platform_ioremap_resource()	2023-07-27 13:00:10 +01:00