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linux/drivers/ata
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Anders Roxell d95d140e83 ata: libahci_platform: ahci_platform_find_clk: oops, NULL pointer 
When booting a arm 32-bit kernel with config CONFIG_AHCI_DWC enabled on
a am57xx-evm board. This happens when the clock references are unnamed
in DT, the strcmp() produces a NULL pointer dereference, see the
following oops, NULL pointer dereference:

[    4.673950] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[    4.682098] [00000000] *pgd=00000000
[    4.685699] Internal error: Oops: 5 [#1] SMP ARM
[    4.690338] Modules linked in:
[    4.693420] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.1.0-rc7 #1
[    4.699615] Hardware name: Generic DRA74X (Flattened Device Tree)
[    4.705749] PC is at strcmp+0x0/0x34
[    4.709350] LR is at ahci_platform_find_clk+0x3c/0x5c
[    4.714416] pc : [<c130c494>]    lr : [<c0c230e0>]    psr: 20000013
[    4.720703] sp : f000dda8  ip : 00000001  fp : c29b1840
[    4.725952] r10: 00000020  r9 : c1b23380  r8 : c1b23368
[    4.731201] r7 : c1ab4cc4  r6 : 00000001  r5 : c3c66040  r4 : 00000000
[    4.737762] r3 : 00000080  r2 : 00000080  r1 : c1ab4cc4  r0 : 00000000
[...]
[    4.998870]  strcmp from ahci_platform_find_clk+0x3c/0x5c
[    5.004302]  ahci_platform_find_clk from ahci_dwc_probe+0x1f0/0x54c
[    5.010589]  ahci_dwc_probe from platform_probe+0x64/0xc0
[    5.016021]  platform_probe from really_probe+0xe8/0x41c
[    5.021362]  really_probe from __driver_probe_device+0xa4/0x204
[    5.027313]  __driver_probe_device from driver_probe_device+0x38/0xc8
[    5.033782]  driver_probe_device from __driver_attach+0xb4/0x1ec
[    5.039825]  __driver_attach from bus_for_each_dev+0x78/0xb8
[    5.045532]  bus_for_each_dev from bus_add_driver+0x17c/0x220
[    5.051300]  bus_add_driver from driver_register+0x90/0x124
[    5.056915]  driver_register from do_one_initcall+0x48/0x1e8
[    5.062591]  do_one_initcall from kernel_init_freeable+0x1cc/0x234
[    5.068817]  kernel_init_freeable from kernel_init+0x20/0x13c
[    5.074584]  kernel_init from ret_from_fork+0x14/0x2c
[    5.079681] Exception stack(0xf000dfb0 to 0xf000dff8)
[    5.084747] dfa0:                                     00000000 00000000 00000000 00000000
[    5.092956] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    5.101165] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    5.107818] Code: e5e32001 e3520000 1afffffb e12fff1e (e4d03001)
[    5.114013] ---[ end trace 0000000000000000 ]---

Add an extra check in the if-statement if hpriv-clks[i].id.

Fixes: 6ce73f3a6f ("ata: libahci_platform: Add function returning a clock-handle by id")
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
2022-12-07 08:36:37 +09:00
..
acard-ahci.c ata: add/use ata_taskfile::{error|status} fields 2022-02-20 09:06:05 +09:00
ahci_brcm.c ata: ahci_brcm: Fix compilation warning 2022-10-18 08:01:57 +09:00
ahci_ceva.c ata: Drop commas after OF match table sentinels 2022-03-07 11:49:10 +09:00
ahci_da850.c ata: libahci_platform: Convert to using devm bulk clocks API 2022-09-17 01:39:22 +09:00
ahci_dm816.c ata: libahci_platform: Convert to using devm bulk clocks API 2022-09-17 01:39:22 +09:00
ahci_dwc.c ata: ahci-dwc: Add Baikal-T1 AHCI SATA interface support 2022-09-17 01:40:31 +09:00
ahci_imx.c ata: ahci_imx: Fix compilation warning 2022-10-18 08:02:14 +09:00
ahci_mtk.c ata: libahci_platform: Parse ports-implemented property in resources getter 2022-09-17 01:39:30 +09:00
ahci_mvebu.c Char/Misc and other driver updates for 5.18-rc1 2022-03-28 12:27:35 -07:00
ahci_octeon.c ata: Drop commas after OF match table sentinels 2022-03-07 11:49:10 +09:00
ahci_platform.c ata: ahci: Add DWC AHCI SATA controller support 2022-09-17 01:40:15 +09:00
ahci_qoriq.c ata: ahci_qoriq: Fix compilation warning 2022-10-18 08:02:14 +09:00
ahci_seattle.c
ahci_st.c ata: ahci_st: Fix compilation warning 2022-10-17 22:01:57 +09:00
ahci_sunxi.c ata: Drop commas after OF match table sentinels 2022-03-07 11:49:10 +09:00
ahci_tegra.c ata: ahci_tegra: call tegra_powergate_power_off only when PM domain is not present 2021-04-11 20:35:08 -06:00
ahci_xgene.c ata: ahci_xgene: Fix compilation warning 2022-10-18 08:02:14 +09:00
ahci.c ata: ahci: Convert __ahci_port_base to accepting hpriv as arguments 2022-09-17 01:39:54 +09:00
ahci.h ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS 2022-10-17 12:02:59 +09:00
ata_generic.c ata: ata_generic: Fix misspelling of 'ata_generic_init_one()' 2021-03-30 20:21:26 -06:00
ata_piix.c ata: libata: make ata_host_suspend() *void* 2022-02-19 11:18:35 +09:00
Kconfig ata: ahci_st: Enable compile test 2022-09-20 08:52:02 +09:00
libahci_platform.c ata: libahci_platform: ahci_platform_find_clk: oops, NULL pointer 2022-12-07 08:36:37 +09:00
libahci.c ata: ahci: Introduce firmware-specific caps initialization 2022-09-17 01:40:02 +09:00
libata-acpi.c ata: make transfer mode masks *unsigned int* 2022-06-17 16:35:02 +09:00
libata-core.c ata changes for 6.1-rc1 2022-10-07 10:48:49 -07:00
libata-eh.c ata changes for 6.1-rc1 2022-10-07 10:48:49 -07:00
libata-pata-timings.c ata: separate PATA timings code from libata-core.c 2020-03-26 10:28:19 -06:00
libata-pmp.c ata: libata: add tracepoints for ATA error handling 2022-01-05 19:33:01 +09:00
libata-sata.c ata changes for 6.1-rc1 2022-10-07 10:48:49 -07:00
libata-scsi.c ata: libata-core: do not issue non-internal commands once EH is pending 2022-11-12 07:51:06 +09:00
libata-sff.c ata: libata-sff: Fix double word in comments 2022-09-16 23:24:06 +09:00
libata-trace.c ata: libata-sff: tracepoints for HSM state machine 2022-01-05 19:33:01 +09:00
libata-transport.c ata: libata-transport: fix error handling in ata_tdev_add() 2022-11-11 17:26:05 +09:00
libata-transport.h
libata-zpodd.c
libata.h ata: libata-core: Simplify ata_build_rw_tf() 2022-08-26 07:46:08 +09:00
Makefile ata: ahci: Add DWC AHCI SATA controller support 2022-09-17 01:40:15 +09:00
pata_acpi.c ata: make transfer mode masks *unsigned int* 2022-06-17 16:35:02 +09:00
pata_ali.c ata: make transfer mode masks *unsigned int* 2022-06-17 16:35:02 +09:00
pata_amd.c ata: make transfer mode masks *unsigned int* 2022-06-17 16:35:02 +09:00
pata_arasan_cf.c ata: libata: make ata_host_suspend() *void* 2022-02-19 11:18:35 +09:00
pata_artop.c ata: pata_artop: use *switch* in atp8xx_fixup() 2022-02-19 11:18:42 +09:00
pata_atiixp.c ata: pata_atiixp: make static read-only arrays const 2022-01-31 09:58:32 +09:00
pata_atp867x.c ata: pata_atp867x: convert printk() calls 2022-01-05 19:33:02 +09:00
pata_bk3710.c
pata_buddha.c ata/pata_buddha: Probe via modalias instead of initcall 2019-08-23 06:58:50 -06:00
pata_cmd64x.c ata: pata_cmd64x: convert printk() calls 2022-01-05 19:33:03 +09:00
pata_cmd640.c ata: pata_cmd640: convert printk() calls 2022-01-05 19:33:02 +09:00
pata_cs5520.c ata: libata: make ata_host_suspend() *void* 2022-02-19 11:18:35 +09:00
pata_cs5530.c ata: pata_cs5530: Avoid overwriting initialised field in 'cs5530_sht' 2021-06-16 06:50:25 -06:00
pata_cs5535.c ata: pata_cs5535: Fix W=1 warnings 2022-06-30 08:21:43 +09:00
pata_cs5536.c ata: pata_cs5536: convert printk() calls 2022-01-05 19:33:03 +09:00
pata_cypress.c ata: pata_cypress: convert printk() calls 2022-01-05 19:33:03 +09:00
pata_efar.c
pata_ep93xx.c ata: add/use ata_taskfile::{error|status} fields 2022-02-20 09:06:05 +09:00
pata_falcon.c pata_falcon: Avoid type warnings from sparse 2021-11-29 20:28:13 +09:00
pata_ftide010.c ata: pata_ftide010: Remove unneeded ERROR check before clk_disable_unprepare 2022-05-16 20:22:37 +09:00
pata_gayle.c
pata_hpt3x2n.c ata: make transfer mode masks *unsigned int* 2022-06-17 16:35:02 +09:00
pata_hpt3x3.c libata: switch remaining drivers to use dma_set_mask_and_coherent 2019-08-26 13:58:59 -06:00
pata_hpt37x.c ata: make transfer mode masks *unsigned int* 2022-06-17 16:35:02 +09:00
pata_hpt366.c ata: make transfer mode masks *unsigned int* 2022-06-17 16:35:02 +09:00
pata_icside.c ata: Avoid comma separated statements 2021-01-31 08:05:46 -07:00
pata_imx.c ata: libata: make ata_host_suspend() *void* 2022-02-19 11:18:35 +09:00
pata_isapnp.c
pata_it821x.c ata: fix read_id() ata port operation interface 2022-01-14 15:17:16 +09:00
pata_it8213.c
pata_ixp4xx_cf.c ata: Drop commas after OF match table sentinels 2022-03-07 11:49:10 +09:00
pata_jmicron.c ata: pata_jmicron: Fix incorrectly documented function parameter 2021-03-12 07:28:31 -07:00
pata_legacy.c ata: pata_legacy: fix pdc20230_set_piomode() 2022-10-31 20:27:27 +09:00
pata_macio.c ata: pata_macio: Remove unneeded word in comments 2022-09-16 23:24:06 +09:00
pata_marvell.c ata: pata_marvell: Check the 'bmdma_addr' beforing reading 2022-04-22 08:45:06 +09:00
pata_mpc52xx.c powerpc/mpc5xxx: Switch mpc5xxx_get_bus_frequency() to use fwnode 2022-06-22 12:51:49 +10:00
pata_mpiix.c
pata_netcell.c ata: fix read_id() ata port operation interface 2022-01-14 15:17:16 +09:00
pata_ninja32.c libata: switch remaining drivers to use dma_set_mask_and_coherent 2019-08-26 13:58:59 -06:00
pata_ns87410.c
pata_ns87415.c ata: add/use ata_taskfile::{error|status} fields 2022-02-20 09:06:05 +09:00
pata_octeon_cf.c ata: pata_octeon_cf: Fix refcount leak in octeon_cf_probe 2022-06-06 09:52:17 +09:00
pata_of_platform.c ata: Drop commas after OF match table sentinels 2022-03-07 11:49:10 +09:00
pata_oldpiix.c
pata_opti.c ata: pata_opti: Fix spelling issue of 'val' in 'opti_write_reg()' 2021-03-30 20:21:26 -06:00
pata_optidma.c pata_optidma: fix checking of DMA state 2021-10-12 17:46:59 +09:00
pata_palmld.c ata: palmld: fix return value check in palmld_pata_probe() 2022-10-31 20:28:05 +09:00
pata_pcmcia.c pata_pcmia: add SanDisk High (>8G) CF card to supported list 2020-01-29 20:54:51 -07:00
pata_pdc202xx_old.c ata: pata_pdc202xx_old: make static read-only array pio_timing const 2022-01-31 09:58:32 +09:00
pata_pdc2027x.c ata: make transfer mode masks *unsigned int* 2022-06-17 16:35:02 +09:00
pata_piccolo.c ata: pata_piccolo: 'ata_tosh_init()' is misnamed in its header 2021-03-30 20:21:25 -06:00
pata_platform.c ata: pata_platform: Make use of platform_get_mem_or_io() 2022-01-31 09:58:31 +09:00
pata_pxa.c ata: pata_pxa: Use platform_get_irq() to get the interrupt 2022-03-10 11:17:59 +09:00
pata_radisys.c pata_radisys: fix checking of DMA state 2021-10-12 17:47:02 +09:00
pata_rb532_cf.c ata: rb532_cf: remove redundant codes 2021-06-24 18:49:01 -06:00
pata_rdc.c
pata_rz1000.c ata: pata_rz1000: convert printk() calls 2022-01-05 19:33:03 +09:00
pata_samsung_cf.c ata: add/use ata_taskfile::{error|status} fields 2022-02-20 09:06:05 +09:00
pata_sc1200.c ata: pata_sc1200: sc1200_sht'Avoid overwriting initialised field in ' 2021-06-16 06:50:25 -06:00
pata_sch.c
pata_serverworks.c ata: make transfer mode masks *unsigned int* 2022-06-17 16:35:02 +09:00
pata_sil680.c ata: pata_sil680: fix result type of sil680_sel{dev|reg}() 2022-04-13 12:42:51 +09:00
pata_sis.c ata: make transfer mode masks *unsigned int* 2022-06-17 16:35:02 +09:00
pata_sl82c105.c ata: pata_sl82c105: Fix potential doc-rot 2021-03-30 20:21:25 -06:00
pata_triflex.c ata: libata: make ata_host_suspend() *void* 2022-02-19 11:18:35 +09:00
pata_via.c ata: make transfer mode masks *unsigned int* 2022-06-17 16:35:02 +09:00
pdc_adma.c ata: pdc_adma: Drop pointless VPRINTK() calls and remove disabled NCQ debugging 2022-01-05 19:33:01 +09:00
sata_dwc_460ex.c ata: sata_dwc_460ex: Fix crash due to OOB write 2022-04-04 09:56:34 +09:00
sata_fsl.c ata changes for 5.18-rc1 2022-03-23 14:35:59 -07:00
sata_gemini.c ata: Make use of the helper function devm_platform_ioremap_resource() 2022-04-22 08:38:18 +09:00
sata_gemini.h
sata_highbank.c ata: Drop commas after OF match table sentinels 2022-03-07 11:49:10 +09:00
sata_inic162x.c ata: add/use ata_taskfile::{error|status} fields 2022-02-20 09:06:05 +09:00
sata_mv.c ata: sata_mv: Fixes expected number of resources now IRQs are gone 2022-08-03 07:59:12 +09:00
sata_nv.c ata: sata_nv: drop pointless VPRINTK() calls and convert remaining ones 2022-01-05 19:33:02 +09:00
sata_promise.c ata: sata_promise: Drop pointless VPRINTK() calls and convert the remaining ones 2022-01-05 19:33:01 +09:00
sata_promise.h
sata_qstor.c ata: sata_qstor: Drop pointless VPRINTK() calls 2022-01-05 19:33:02 +09:00
sata_rcar.c ata: sata_rcar: Fix compilation warning 2022-10-18 08:01:45 +09:00
sata_sil24.c ata: libata: add reset tracepoints 2022-01-04 20:00:57 +09:00
sata_sil.c ata: sata_sil: Drop pointless VPRINTK() calls 2022-01-05 19:33:02 +09:00
sata_sis.c
sata_svw.c ata: add/use ata_taskfile::{error|status} fields 2022-02-20 09:06:05 +09:00
sata_sx4.c ata: sata_sx4: convert printk() calls 2022-01-05 19:33:03 +09:00
sata_uli.c
sata_via.c libata: switch remaining drivers to use dma_set_mask_and_coherent 2019-08-26 13:58:59 -06:00
sata_vsc.c ata: add/use ata_taskfile::{error|status} fields 2022-02-20 09:06:05 +09:00
sis.h