Hello, Cc Steven On (01/24/17 19:20), kernel test robot wrote: > of/unittest: fix infinite loop in of_unittest_destroy_tracked_overlays() > > of_overlay_destroy() can return `-ENODEV' error code once it > failed to find the requested overlay in `ov_idr'. However, > of_unittest_destroy_tracked_overlays() does not handle this > error code correctly and continues to call of_overlay_destroy() > on the 'missing' overlay over and over again. This results in > a printk flood > > [..] > [ 33.497583] of_overlay_destroy: Could not find overlay #6 > [ 33.497583] of_overlay_destroy: Could not find overlay #6 > [ 33.497584] ### dt-test ### of_unittest_destroy_tracked_overlays: overlay destroy failed for #6 > [ 33.497584] ### dt-test ### of_unittest_destroy_tracked_overlays: overlay destroy failed for #6 > [ 33.497586] of_overlay_destroy: Could not find overlay #6 > [ 33.497586] of_overlay_destroy: Could not find overlay #6 > [ 33.497587] ### dt-test ### of_unittest_destroy_tracked_overlays: overlay destroy failed for #6 > [ 33.497587] ### dt-test ### of_unittest_destroy_tracked_overlays: overlay destroy failed for #6 > [..] hm, frankly... I see no connection. // I even checked the date of the mail, because the commit is from March 2016. > [ 14.130887] sock: process `trinity-main' is using obsolete setsockopt SO_BSDCOMPAT > [ 18.803451] BUG: unable to handle kernel NULL pointer dereference at 00000012 > [ 18.805819] IP: [<c9aa6893>] perf_prepare_sample+0x82/0x2a7 > [ 18.807694] *pde = 00000000 > [ 18.809017] Oops: 0000 [#1] DEBUG_PAGEALLOC > [ 18.810162] Modules linked in: > [ 18.811069] CPU: 0 PID: 12140 Comm: trinity-main Not tainted 4.5.0-rc1-00010-g815d74b #1 > [ 18.812906] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014 > [ 18.815004] task: d013ca00 ti: d0614000 task.ti: d0614000 > [ 18.816107] EIP: 0060:[<c9aa6893>] EFLAGS: 00010206 CPU: 0 > [ 18.817247] EIP is at perf_prepare_sample+0x82/0x2a7 > [ 18.818305] EAX: 00000012 EBX: d0615d24 ECX: 00000008 EDX: 00000001 > [ 18.819499] ESI: d0615e00 EDI: d06184b0 EBP: d0615d08 ESP: d0615ce4 > [ 18.820713] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 > [ 18.821827] CR0: 80050033 CR2: 00000012 CR3: 1068d000 CR4: 00040610 > [ 18.823044] DR0: c0100220 DR1: 080ce000 DR2: 00000000 DR3: 00000000 > [ 18.824240] DR6: ffff0ff0 DR7: 00010602 > [ 18.825162] Stack: > [ 18.825885] 00000000 00000000 c9aa6ab8 00000000 00000000 000021ea d06184b0 d0615e00 > [ 18.828238] d0615fb4 d0615d50 c9aa6af3 d0615fb4 00000002 00000000 00000000 c9aa6ab8 > [ 18.830578] 00000009 00300002 d013ce78 d0615d3c c9a2888f d013ce78 d0615d48 c9a07cf5 > [ 18.832911] Call Trace: > [ 18.833732] [<c9aa6ab8>] ? perf_prepare_sample+0x2a7/0x2a7 > [ 18.834865] [<c9aa6af3>] perf_event_output+0x3b/0x89 > [ 18.835929] [<c9aa6ab8>] ? perf_prepare_sample+0x2a7/0x2a7 > [ 18.837114] [<c9a2888f>] ? kvm_sched_clock_read+0x9/0x18 > [ 18.838211] [<c9a07cf5>] ? sched_clock+0x9/0xd > [ 18.839217] [<c9aa6ca6>] __perf_event_overflow+0x165/0x1d2 > [ 18.840381] [<c9aa742f>] perf_swevent_overflow+0x46/0x60 > [ 18.841481] [<c9aa750b>] perf_swevent_event+0xc2/0xcc > [ 18.842554] [<c9aa7ab1>] ___perf_sw_event+0x24b/0x25b > [ 18.843678] [<c9a07cf5>] ? sched_clock+0x9/0xd > [ 18.844687] [<c9a28871>] ? kvm_clock_read+0x14/0x1d > [ 18.845744] [<c9a2888f>] ? kvm_sched_clock_read+0x9/0x18 this doesn't look like 'of/unittest' related problem to me. a NULL deref in perf_prepare_sample(). hm. -ss -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
