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c6e316ac05
linux/drivers/perf
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Alexandre Ghiti c6e316ac05
drivers: perf: Check find_first_bit() return value 
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>
2023-11-09 06:37:49 -08:00
..
amlogic drivers/perf: Explicitly include correct DT includes 2023-07-27 13:02:23 +01:00
arm_cspmu perf: arm_cspmu: Add missing MODULE_DEVICE_TABLE 2023-06-16 10:32:32 +01:00
hisilicon drivers/perf: hisi: Schedule perf session according to locality 2023-08-16 14:27:43 +01:00
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_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_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_pmu.c arm_pmu: Remove unused PERF_PMU_CAP_HETEROGENEOUS_CPUS capability 2023-07-26 12:28:47 +02:00
arm_pmuv3.c ARM: 2023-09-07 13:52:20 -07:00
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
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: Add CMN-700 r3 support 2023-07-28 14:31:06 +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
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
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_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 2023-11-09 06:37:49 -08:00
riscv_pmu.c RISC-V Patches for the 6.6 Merge Window, Part 1 2023-09-01 08:09:48 -07:00
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