On 21-06-01 12:02:34, Alexandru Elisei wrote: > I've been seeing the following panic when shutting down my rockpro64: > > [ 21.459064] xhci-hcd xhci-hcd.0.auto: USB bus 5 deregistered > [ 21.683077] Unable to handle kernel NULL pointer dereference at virtual address > 00000000000000a0 > [ 21.683858] Mem abort info: > [ 21.684104] ESR = 0x96000004 > [ 21.684375] EC = 0x25: DABT (current EL), IL = 32 bits > [ 21.684841] SET = 0, FnV = 0 > [ 21.685111] EA = 0, S1PTW = 0 > [ 21.685389] Data abort info: > [ 21.685644] ISV = 0, ISS = 0x00000004 > [ 21.686024] CM = 0, WnR = 0 > [ 21.686288] user pgtable: 4k pages, 48-bit VAs, pgdp=000000000757a000 > [ 21.686853] [00000000000000a0] pgd=0000000000000000, p4d=0000000000000000 > [ 21.687452] Internal error: Oops: 96000004EEMPT SMP > [ 21.687941] Modules linked in: > [ 21.688214] CPU: 4 PID: 1 Comm: shutdown Not tainted > 5.12.0-rc7-00262-g568262bf5492 #33 > [ 21.688915] Hardware name: Pine64 RockPro64 v2.0 (DT) > [ 21.689357] pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--) > [ 21.689884] pc : down_read_interruptible+0xec/0x200 > [ 21.690321] lr : simple_recursive_removal+0x48/0x280 > [ 21.690761] sp : ffff800011f4b940 > [ 21.691053] x29: ffff800011f4b940 x28: ffff000000809b40 > [ 21.691522] x27: ffff000000809b98 x26: ffff8000114f5170 > [ 21.691990] x25: 00000000000000a0 x24: ffff800011e84030 > [ 21.692459] x23: 0000000000000080 x22: 0000000000000000 > [ 21.692927] x21: ffff800011ecaa5c x20: ffff800011ecaa60 > [ 21.693395] x19: ffff000000809b40 x18: ffffffffffffffff > [ 21.693863] x17: 0000000000000000 x16: 0000000000000000 > [ 21.694331] x15: ffff800091f4ba6d x14: 0000000000000004 > [ 21.694799] x13: 0000000000000000 x12: 0000000000000020 > [ 21.695267] x11: 0101010101010101 x10: 7f7f7f7f7f7f7f7f > [ 21.695735] x9 : 6f6c746364716e62 x8 : 7f7f7f7f7f7f7f7f > [ 21.696203] x7 : fefefeff6364626d x6 : 0000000000001bd8 > [ 21.696671] x5 : 0000000000000000 x4 : 0000000000000000 > [ 21.697138] x3 : 00000000000000a0 x2 : 0000000000000001 > [ 21.697606] x1 : 0000000000000000 x0 : 00000000000000a0 > [ 21.698075] Call trace: > [ 21.698291] down_read_interruptible+0xec/0x200 > [ 21.698690] debugfs_remove+0x60/0x84 > [ 21.699016] dwc3_debugfs_exit+0x1c/0x6c > [ 21.699363] dwc3_remove+0x34/0x1a0 > [ 21.699672] platform_remove+0x28/0x60 > [ 21.700005] __device_release_driver+0x188/0x230 > [ 21.700414] device_release_driver+0x2c/0x44 > [ 21.700791] bus_remove_device+0x124/0x130 > [ 21.701154] device_del+0x168/0x420 > [ 21.701462] platform_device_del.part.0+0x1c/0x90 > [ 21.701877] platform_device_unregister+0x28/0x44 > [ 21.702291] of_platform_device_destroy+0xe8/0x100 > [ 21.702716] device_for_each_child_reverse+0x64/0xb4 > [ 21.703153] of_platform_depopulate+0x40/0x84 > [ 21.703538] __dwc3_of_simple_teardown+0x20/0xd4 > [ 21.703945] dwc3_of_simple_shutdown+0x14/0x20 > [ 21.704337] platform_shutdown+0x28/0x40 > [ 21.704683] device_shutdown+0x158/0x330 > [ 21.705029] kernel_power_off+0x38/0x7c > [ 21.705372] __do_sys_reboot+0x16c/0x2a0 > [ 21.705719] __arm64_sys_reboot+0x28/0x34 > [ 21.706074] el0_svc_common.constprop.0+0x60/0x120 > [ 21.706499] do_el0_svc+0x28/0x94 > [ 21.706794] el0_svc+0x2c/0x54 > [ 21.707067] el0_sync_handler+0xa4/0x130 > [ 21.707414] el0_sync+0x170/0x180 > [ 21.707711] Code: c8047c62 35ffff84 17fffe5f f9800071 (c85ffc60) > [ 21.708250] ---[ end trace 5ae08147542eb468 ]--- > [ 21.708667] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b > [ 21.709456] Kernel Offset: disabled > [ 21.709762] CPU features: 0x00240022,2100600c > [ 21.710146] Memory Limit: 2048 MB > [ 21.710443] ---[ end Kernel panic - not syncing: Attempted to kill init! > exitcode=0x0000000b ]--- > I find down_read_interruptible is called at sys_perf_event_open, could you find the relationship between remove debugfs and perf event functions? -- Thanks, Peter Chen
