https://bugzilla.kernel.org/show_bug.cgi?id=212901 --- Comment #1 from jdoe35087@xxxxxxxxx --- Update by original bug reporter This seems like a problem with the MUSB driver in dual role mode. I shouldn't have submitted it here in the FS topic. The full stack trace is printed below. The panic occurs when the following item is set to 'Dual Role Mode'. The kernel does not panic when it is set into 'host only mode' Device Drivers > USB Support > Inventra Highspeed Dual Role Controller > MUSB Mode Selection -------------- [ 1.393586] 8<--- cut here --- [ 1.396657] Unable to handle kernel NULL pointer dereference at virtual address 00000050 [ 1.404922] pgd = e4f2b729 [ 1.407708] [00000050] *pgd=00000000 [ 1.411364] Internal error: Oops: 5 [#1] PREEMPT SMP ARM [ 1.416702] Modules linked in: [ 1.419778] CPU: 0 PID: 52 Comm: kworker/0:1 Not tainted 5.4.115-dirty #3 [ 1.426593] Hardware name: Generic AM33XX (Flattened Device Tree) [ 1.432738] Workqueue: events deferred_probe_work_func [ 1.437914] PC is at kernfs_find_ns+0x18/0x114 [ 1.442378] LR is at kernfs_find_and_get_ns+0x40/0x58 [ 1.447450] pc : [<c032a2bc>] lr : [<c032ab00>] psr: 60000013 [ 1.453742] sp : df2a3960 ip : df2a3990 fp : df2a398c [ 1.458987] r10: 00000002 r9 : 00000000 r8 : df4f1040 [ 1.464232] r7 : 00000000 r6 : c083a5e0 r5 : 00000000 r4 : c0b39024 [ 1.470786] r3 : df276bc0 r2 : 00000000 r1 : c083a5e0 r0 : 00000000 [ 1.477343] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 1.484508] Control: 10c5387d Table: 80004019 DAC: 00000051 [ 1.490278] Process kworker/0:1 (pid: 52, stack limit = 0x3f5c7652) [ 1.496573] Stack: (0xdf2a3960 to 0xdf2a4000) [ 1.500953] 3960: 00000d44 df2a3964 df2a3964 8402c3db c0b39024 00000000 c083a5e0 00000000 [ 1.509168] 3980: df2a39ac df2a3990 c032ab00 c032a2b0 c083a5a4 00000010 df4f11a8 df4f0040 [ 1.517384] 39a0: df2a39c4 df2a39b0 c032f588 c032aacc df4f11a8 00000010 df2a39dc df2a39c8 [ 1.525600] 39c0: c04b9b20 c032f56c df4f11ec 00000010 df2a3a2c df2a39e0 c04a96b4 c04b9b00 [ 1.533817] 39e0: df4f1170 00000000 ffffffea df4f11a8 df2a3a0c df2a3a00 c04a8c90 8402c3db [ 1.542033] 3a00: df2a3a34 df4f11a8 00000010 00000010 df4f0040 df4f1040 00000000 00000002 [ 1.550249] 3a20: df2a3a44 df2a3a30 c04a9a94 c04a963c ffffffea 00000010 df2a3a74 df2a3a48 [ 1.558466] 3a40: c051d7a0 c04a9a84 00000000 df4f0040 df4f0040 df4f0040 df4f1040 c0b8e59c [ 1.566682] 3a60: df48ca00 df48e640 df2a3b34 df2a3a78 c0511348 c051d600 df48e680 df4f0040 [ 1.574897] 3a80: 00000400 c040bbd8 df48ca00 df48e640 c0b8e59c c097f5d4 c0964638 00000036 [ 1.583114] 3aa0: c0991af8 df48ca10 5455baf8 382d494d 7964202c 4946206e 2c734f46 6c756220 [ 1.591331] 3ac0: 6f63206b 6e69626d 62202c65 206b6c75 696c7073 48202c74 53492d42 7852204f [ 1.599547] 3ae0: 4248202c 4f53492d 2c785420 666f5320 6e6f4374 c032006e df2a3b2c df2a3b08 [ 1.607763] 3b00: c032eac4 8402c3db df48ca10 00000000 df48ca10 c0b4a780 c0b8dd28 00000000 [ 1.615980] 3b20: c0b4a780 00000007 df2a3b54 df2a3b38 c04b0ef4 c05109f8 df48ca10 c0b8dd24 [ 1.624196] 3b40: 00000000 c0b8dd28 df2a3b8c df2a3b58 c04aeb48 c04b0ea8 c07541bc c016593c [ 1.632412] 3b60: df2a3b8c df48ca10 c0b4a780 df48ca10 c0b8dd00 00000000 00000000 c0b12db4 [ 1.640628] 3b80: df2a3bbc df2a3b90 c04af1b0 c04aea50 df48ca10 c0b8dd00 df2a3bbc c0b4a780 [ 1.648845] 3ba0: df2a3c14 df48ca10 c0b8dd00 00000000 df2a3bdc df2a3bc0 c04af490 c04af14c [ 1.657061] 3bc0: 00000000 df2a3c14 c04af3d8 c0b8dd00 df2a3c0c df2a3be0 c04ac84c c04af3e4 [ 1.665277] 3be0: df2a3c0c df09fe6c df395c38 8402c3db df48ca10 df48ca10 00000001 df48ca54 [ 1.673493] 3c00: df2a3c3c df2a3c10 c04ae720 c04ac7c8 c0732864 df48ca10 00000001 8402c3db [ 1.681709] 3c20: 00000000 df48ca10 c0b47368 df48ca10 df2a3c4c df2a3c40 c04af4e0 c04ae64c [ 1.689925] 3c40: df2a3c6c df2a3c50 c04adaf8 c04af4d0 df48ca10 00000000 df3a8810 c0b8dd00 [ 1.698141] 3c60: df2a3cac df2a3c70 c04aa1f0 c04ada70 df2a3c94 df2a3c80 df2a3c94 df2a3c88 [ 1.706357] 3c80: c0754218 8402c3db df48e620 df48ca00 00000002 00000000 df48ca10 c0b12d94 [ 1.714573] 3ca0: df2a3cdc df2a3cb0 c04b0c94 c04a9f0c c0165f02 00000000 df3a8810 dfbf8080 [ 1.722789] 3cc0: df48ca00 c0b4b738 df47cdc0 00000007 df2a3d74 df2a3ce0 c05209b8 c04b0b80 [ 1.731006] 3ce0: 00000000 df2a3d74 00000001 c0165f02 c04bb468 8402c3db df2a3dfa c01b16d4 [ 1.739222] 3d00: df47cdc0 df2a3d10 c0b4b738 47401400 474017ff cfffb984 00000200 00000000 [ 1.747438] 3d20: 00000000 00000000 00000000 00000036 00000036 cfffb9ac 00000400 00000000 [ 1.755654] 3d40: 00000000 00000000 00000000 8402c3db df3a8800 df43fd00 00000000 df3a8810 [ 1.763870] 3d60: c099205c c0b4b6dc df2a3dac df2a3d78 c0520b78 c052076c 00002000 c099205c [ 1.772086] 3d80: df43fd00 df3a8810 df3a8810 00000000 df3a8810 c0b4b6dc c0b8dd28 00000000 [ 1.780301] 3da0: df2a3dcc df2a3db0 c04b0ef4 c0520aa8 df3a8810 c0b8dd24 00000000 c0b8dd28 [ 1.788517] 3dc0: df2a3e04 df2a3dd0 c04aeb48 c04b0ea8 c07541bc c016593c df2a3e04 df3a8810 [ 1.796734] 3de0: c0b4b6dc df3a8810 dfbcfd00 00000000 00000000 00000000 df2a3e34 df2a3e08 [ 1.804950] 3e00: c04af1b0 c04aea50 df3a8810 dfbcfd00 df2a3e34 c0b4b6dc df2a3e8c df3a8810 [ 1.813166] 3e20: dfbcfd00 00000000 df2a3e54 df2a3e38 c04af490 c04af14c 00000000 df2a3e8c [ 1.821383] 3e40: c04af3d8 dfbcfd00 df2a3e84 df2a3e58 c04ac84c c04af3e4 df2a3e84 df09fe6c [ 1.829599] 3e60: df395cb8 8402c3db df3a8810 df3a8810 00000001 df3a8854 df2a3eb4 df2a3e88 [ 1.837816] 3e80: c04ae720 c04ac7c8 c0b47120 df3a8810 00000001 8402c3db df2a3ecc df3a8810 [ 1.846032] 3ea0: c0b47368 df3a8810 df2a3ec4 df2a3eb8 c04af4e0 c04ae64c df2a3ee4 df2a3ec8 [ 1.854248] 3ec0: c04adaf8 c04af4d0 df3a8810 c0b4710c c0b47120 dfbcfd00 df2a3f04 df2a3ee8 [ 1.862463] 3ee0: c04adf60 c04ada70 c0b47144 df285580 dfbccb40 dfbcfd00 df2a3f3c df2a3f08 [ 1.870679] 3f00: c0157f54 c04adefc df2a3f24 dfbccb40 dfbccb40 df285580 dfbccb40 df285594 [ 1.878896] 3f20: dfbccb58 c0b03d00 00000008 dfbccb40 df2a3f74 df2a3f40 c0158528 c0157d5c [ 1.887112] 3f40: df2a3f74 df2a2000 c015dffc df273700 df273600 df2a2000 00000000 df285580 [ 1.895328] 3f60: c01582f0 df101e84 df2a3fac df2a3f78 c015e318 c01582fc 00000000 df27371c [ 1.903543] 3f80: df2a3fac df273600 c015e1ac 00000000 00000000 00000000 00000000 00000000 [ 1.911758] 3fa0: 00000000 df2a3fb0 c01010e8 c015e1b8 00000000 00000000 00000000 00000000 [ 1.919975] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 1.928190] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000 [ 1.936399] Backtrace: [ 1.938865] [<c032a2a4>] (kernfs_find_ns) from [<c032ab00>] (kernfs_find_and_get_ns+0x40/0x58) [ 1.947518] r7:00000000 r6:c083a5e0 r5:00000000 r4:c0b39024 [ 1.953211] [<c032aac0>] (kernfs_find_and_get_ns) from [<c032f588>] (sysfs_unmerge_group+0x28/0x68) [ 1.962298] r7:df4f0040 r6:df4f11a8 r5:00000010 r4:c083a5a4 [ 1.967986] [<c032f560>] (sysfs_unmerge_group) from [<c04b9b20>] (dpm_sysfs_remove+0x2c/0x6c) [ 1.976547] r5:00000010 r4:df4f11a8 [ 1.980140] [<c04b9af4>] (dpm_sysfs_remove) from [<c04a96b4>] (device_del+0x84/0x448) [ 1.988003] r5:00000010 r4:df4f11ec [ 1.991595] [<c04a9630>] (device_del) from [<c04a9a94>] (device_unregister+0x1c/0x30) [ 1.999460] r10:00000002 r9:00000000 r8:df4f1040 r7:df4f0040 r6:00000010 r5:00000010 [ 2.007323] r4:df4f11a8 [ 2.009875] [<c04a9a78>] (device_unregister) from [<c051d7a0>] (musb_gadget_setup+0x1ac/0x1bc) [ 2.018522] r5:00000010 r4:ffffffea [ 2.022116] [<c051d5f4>] (musb_gadget_setup) from [<c0511348>] (musb_probe+0x95c/0xc30) [ 2.030156] r8:df48e640 r7:df48ca00 r6:c0b8e59c r5:df4f1040 r4:df4f0040 [ 2.036894] [<c05109ec>] (musb_probe) from [<c04b0ef4>] (platform_drv_probe+0x58/0xa8) [ 2.044848] r10:00000007 r9:c0b4a780 r8:00000000 r7:c0b8dd28 r6:c0b4a780 r5:df48ca10 [ 2.052709] r4:00000000 [ 2.055257] [<c04b0e9c>] (platform_drv_probe) from [<c04aeb48>] (really_probe+0x104/0x45c) [ 2.063557] r7:c0b8dd28 r6:00000000 r5:c0b8dd24 r4:df48ca10 [ 2.069244] [<c04aea44>] (really_probe) from [<c04af1b0>] (driver_probe_device+0x70/0x180) [ 2.077548] r10:c0b12db4 r9:00000000 r8:00000000 r7:c0b8dd00 r6:df48ca10 r5:c0b4a780 [ 2.085409] r4:df48ca10 [ 2.087957] [<c04af140>] (driver_probe_device) from [<c04af490>] (__device_attach_driver+0xb8/0xec) [ 2.097044] r8:00000000 r7:c0b8dd00 r6:df48ca10 r5:df2a3c14 r4:c0b4a780 [ 2.103777] [<c04af3d8>] (__device_attach_driver) from [<c04ac84c>] (bus_for_each_drv+0x90/0xe0) [ 2.112602] r7:c0b8dd00 r6:c04af3d8 r5:df2a3c14 r4:00000000 [ 2.118289] [<c04ac7bc>] (bus_for_each_drv) from [<c04ae720>] (__device_attach+0xe0/0x19c) [ 2.126588] r6:df48ca54 r5:00000001 r4:df48ca10 [ 2.131229] [<c04ae640>] (__device_attach) from [<c04af4e0>] (device_initial_probe+0x1c/0x20) [ 2.139790] r6:df48ca10 r5:c0b47368 r4:df48ca10 [ 2.144430] [<c04af4c4>] (device_initial_probe) from [<c04adaf8>] (bus_probe_device+0x94/0x9c) [ 2.153082] [<c04ada64>] (bus_probe_device) from [<c04aa1f0>] (device_add+0x2f0/0x64c) [ 2.161034] r7:c0b8dd00 r6:df3a8810 r5:00000000 r4:df48ca10 [ 2.166722] [<c04a9f00>] (device_add) from [<c04b0c94>] (platform_device_add+0x120/0x218) [ 2.174937] r9:c0b12d94 r8:df48ca10 r7:00000000 r6:00000002 r5:df48ca00 r4:df48e620 [ 2.182721] [<c04b0b74>] (platform_device_add) from [<c05209b8>] (dsps_create_musb_pdev+0x258/0x33c) [ 2.191897] r10:00000007 r9:df47cdc0 r8:c0b4b738 r7:df48ca00 r6:dfbf8080 r5:df3a8810 [ 2.199759] r4:00000000 r3:c0165f02 [ 2.203353] [<c0520760>] (dsps_create_musb_pdev) from [<c0520b78>] (dsps_probe+0xdc/0x1c0) [ 2.211656] r9:c0b4b6dc r8:c099205c r7:df3a8810 r6:00000000 r5:df43fd00 r4:df3a8800 [ 2.219437] [<c0520a9c>] (dsps_probe) from [<c04b0ef4>] (platform_drv_probe+0x58/0xa8) [ 2.227389] r8:00000000 r7:c0b8dd28 r6:c0b4b6dc r5:df3a8810 r4:00000000 [ 2.234123] [<c04b0e9c>] (platform_drv_probe) from [<c04aeb48>] (really_probe+0x104/0x45c) [ 2.242423] r7:c0b8dd28 r6:00000000 r5:c0b8dd24 r4:df3a8810 [ 2.248111] [<c04aea44>] (really_probe) from [<c04af1b0>] (driver_probe_device+0x70/0x180) [ 2.256413] r10:00000000 r9:00000000 r8:00000000 r7:dfbcfd00 r6:df3a8810 r5:c0b4b6dc [ 2.264274] r4:df3a8810 [ 2.266822] [<c04af140>] (driver_probe_device) from [<c04af490>] (__device_attach_driver+0xb8/0xec) [ 2.275909] r8:00000000 r7:dfbcfd00 r6:df3a8810 r5:df2a3e8c r4:c0b4b6dc [ 2.282642] [<c04af3d8>] (__device_attach_driver) from [<c04ac84c>] (bus_for_each_drv+0x90/0xe0) [ 2.291465] r7:dfbcfd00 r6:c04af3d8 r5:df2a3e8c r4:00000000 [ 2.297152] [<c04ac7bc>] (bus_for_each_drv) from [<c04ae720>] (__device_attach+0xe0/0x19c) [ 2.305452] r6:df3a8854 r5:00000001 r4:df3a8810 [ 2.310092] [<c04ae640>] (__device_attach) from [<c04af4e0>] (device_initial_probe+0x1c/0x20) [ 2.318654] r6:df3a8810 r5:c0b47368 r4:df3a8810 [ 2.323294] [<c04af4c4>] (device_initial_probe) from [<c04adaf8>] (bus_probe_device+0x94/0x9c) [ 2.331946] [<c04ada64>] (bus_probe_device) from [<c04adf60>] (deferred_probe_work_func+0x70/0x9c) [ 2.340945] r7:dfbcfd00 r6:c0b47120 r5:c0b4710c r4:df3a8810 [ 2.346638] [<c04adef0>] (deferred_probe_work_func) from [<c0157f54>] (process_one_work+0x204/0x5a0) [ 2.355810] r7:dfbcfd00 r6:dfbccb40 r5:df285580 r4:c0b47144 [ 2.361496] [<c0157d50>] (process_one_work) from [<c0158528>] (worker_thread+0x238/0x584) [ 2.369711] r10:dfbccb40 r9:00000008 r8:c0b03d00 r7:dfbccb58 r6:df285594 r5:dfbccb40 [ 2.377573] r4:df285580 [ 2.380126] [<c01582f0>] (worker_thread) from [<c015e318>] (kthread+0x16c/0x184) [ 2.387556] r10:df101e84 r9:c01582f0 r8:df285580 r7:00000000 r6:df2a2000 r5:df273600 [ 2.395418] r4:df273700 [ 2.397966] [<c015e1ac>] (kthread) from [<c01010e8>] (ret_from_fork+0x14/0x2c) [ 2.405218] Exception stack(0xdf2a3fb0 to 0xdf2a3ff8) [ 2.410292] 3fa0: 00000000 00000000 00000000 00000000 [ 2.418508] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 2.426722] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 2.433367] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c015e1ac [ 2.441229] r4:df273600 [ 2.443776] Code: e24cb004 e24dd010 e52de004 e8bd4000 (e1d035b0) [ 2.450053] ---[ end trace 715d8f953e5915b6 ]--- -- You may reply to this email to add a comment. 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