WARNING in ctx_sched

Title	Replies (including bot)	Last reply
[syzbot] [perf?] WARNING in ctx_sched_in (2)	1 (2)	2024/01/22 11:43

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in ctx_sched_in perf				33	1236d	1299d	0/28	auto-closed as invalid on 2021/10/16 18:41

upstream

WARNING in ctx_sched_in perf

1236d

1299d

0/28

auto-closed as invalid on 2021/10/16 18:41

------------[ cut here ]------------ WARNING: CPU: 1 PID: 11671 at kernel/events/core.c:3923 ctx_sched_in+0xb0/0x14c kernel/events/core.c:3936 Modules linked in: CPU: 1 PID: 11671 Comm: syz-executor.0 Not tainted 6.7.0-syzkaller-10085-g1b1934dbbdcf #0 Hardware name: linux,dummy-virt (DT) pstate: 004000c9 (nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ctx_sched_in+0xb0/0x14c kernel/events/core.c:3923 lr : perf_event_sched_in kernel/events/core.c:2677 [inline] lr : perf_event_context_sched_in kernel/events/core.c:3983 [inline] lr : __perf_event_task_sched_in+0x11c/0x1d0 kernel/events/core.c:4012 sp : ffff8000835e3940 x29: ffff8000835e3940 x28: f2ff00002c4d7570 x27: 000000000000000e x26: 0000000000000001 x25: f5ff00004b7fbc78 x24: f5ff00004b7fb600 x23: f9ff000002eab600 x22: 0000000000000002 x21: 0000000000000007 x20: faff000014d8c900 x19: ffff00007f9d00b8 x18: ffff800083abbba8 x17: ffff7ffffd514000 x16: ffff800080008000 x15: 0000000000000001 x14: 000000000000006e x13: 0000000000000000 x12: ffff8000824dfe70 x11: 0000000000000001 x10: 68221d39881c888f x9 : 9edf92a6ba7012f5 x8 : f5ff00004b7fc7a8 x7 : 0000000000000004 x6 : 0000000000000001 x5 : ffff7ffffd514000 x4 : 0000000000000000 x3 : ffff7ffffd514000 x2 : f5ff00004b7fb600 x1 : 0000000000000002 x0 : 0000000000000000 Call trace: ctx_sched_in+0xb0/0x14c kernel/events/core.c:3936 perf_event_sched_in kernel/events/core.c:2677 [inline] perf_event_context_sched_in kernel/events/core.c:3983 [inline] __perf_event_task_sched_in+0x11c/0x1d0 kernel/events/core.c:4012 perf_event_task_sched_in include/linux/perf_event.h:1484 [inline] finish_task_switch.isra.0+0x104/0x248 kernel/sched/core.c:5269 context_switch kernel/sched/core.c:5403 [inline] __schedule+0x328/0x8a8 kernel/sched/core.c:6727 preempt_schedule_common kernel/sched/core.c:6904 [inline] preempt_schedule+0x48/0x60 kernel/sched/core.c:6928 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0x34/0x44 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] unlock_page_lruvec_irqrestore include/linux/memcontrol.h:1672 [inline] release_pages+0xf4/0x530 mm/swap.c:1039 free_pages_and_swap_cache+0x58/0x68 mm/swap_state.c:316 tlb_batch_pages_flush+0x54/0x8c mm/mmu_gather.c:98 tlb_flush_mmu_free mm/mmu_gather.c:293 [inline] tlb_flush_mmu mm/mmu_gather.c:300 [inline] tlb_finish_mmu+0x74/0x1c0 mm/mmu_gather.c:392 exit_mmap+0x144/0x280 mm/mmap.c:3290 __mmput+0x3c/0x170 kernel/fork.c:1343 mmput+0x50/0x5c kernel/fork.c:1365 exit_mm kernel/exit.c:569 [inline] do_exit+0x288/0x960 kernel/exit.c:858 __do_sys_exit kernel/exit.c:987 [inline] __se_sys_exit kernel/exit.c:985 [inline] do_group_exit+0x0/0x90 kernel/exit.c:985 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:51 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:136 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:155 el0_svc+0x34/0xd8 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:595 ---[ end trace 0000000000000000 ]--- Unable to handle kernel NULL pointer dereference at virtual address 0000000000000028 Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=0000000054ec7000 [0000000000000028] pgd=0800000045bd1003, p4d=0800000045bd1003, pud=0000000000000000 Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 11671 Comm: syz-executor.0 Tainted: G W 6.7.0-syzkaller-10085-g1b1934dbbdcf #0 Hardware name: linux,dummy-virt (DT) pstate: 004000c9 (nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : perf_ctx_sched_task_cb+0x14/0x80 kernel/events/core.c:3484 lr : perf_event_context_sched_in kernel/events/core.c:3985 [inline] lr : __perf_event_task_sched_in+0x140/0x1d0 kernel/events/core.c:4012 sp : ffff8000835e3950 x29: ffff8000835e3950 x28: f2ff00002c4d7570 x27: 000000000000000e x26: 0000000000000001 x25: f5ff00004b7fbc78 x24: f5ff00004b7fb600 x23: f9ff000002eab600 x22: f5ff00004b7fb600 x21: faff000014d8c900 x20: 0000000000000000 x19: ffff8000824bc0b8 x18: ffff800083abbba8 x17: ffff7ffffd514000 x16: ffff800080008000 x15: 0000000000000001 x14: 000000000000006e x13: 0000000000000000 x12: ffff8000824dfe70 x11: 0000000000000001 x10: 68221d39881c888f x9 : 9edf92a6ba7012f5 x8 : f5ff00004b7fc7a8 x7 : 0000000000000004 x6 : 0000000000000001 x5 : ffff7ffffd514000 x4 : 0000000000000000 x3 : ffff7ffffd514000 x2 : f5ff00004b7fb600 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: perf_ctx_sched_task_cb+0x14/0x80 kernel/events/core.c:3484 perf_event_context_sched_in kernel/events/core.c:3985 [inline] __perf_event_task_sched_in+0x140/0x1d0 kernel/events/core.c:4012 perf_event_task_sched_in include/linux/perf_event.h:1484 [inline] finish_task_switch.isra.0+0x104/0x248 kernel/sched/core.c:5269 context_switch kernel/sched/core.c:5403 [inline] __schedule+0x328/0x8a8 kernel/sched/core.c:6727 preempt_schedule_common kernel/sched/core.c:6904 [inline] preempt_schedule+0x48/0x60 kernel/sched/core.c:6928 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0x34/0x44 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] unlock_page_lruvec_irqrestore include/linux/memcontrol.h:1672 [inline] release_pages+0xf4/0x530 mm/swap.c:1039 free_pages_and_swap_cache+0x58/0x68 mm/swap_state.c:316 tlb_batch_pages_flush+0x54/0x8c mm/mmu_gather.c:98 tlb_flush_mmu_free mm/mmu_gather.c:293 [inline] tlb_flush_mmu mm/mmu_gather.c:300 [inline] tlb_finish_mmu+0x74/0x1c0 mm/mmu_gather.c:392 exit_mmap+0x144/0x280 mm/mmap.c:3290 __mmput+0x3c/0x170 kernel/fork.c:1343 mmput+0x50/0x5c kernel/fork.c:1365 exit_mm kernel/exit.c:569 [inline] do_exit+0x288/0x960 kernel/exit.c:858 __do_sys_exit kernel/exit.c:987 [inline] __se_sys_exit kernel/exit.c:985 [inline] do_group_exit+0x0/0x90 kernel/exit.c:985 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:51 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:136 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:155 el0_svc+0x34/0xd8 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:595 Code: a9bd7bfd 910003fd a90153f3 aa0003f4 (f8428e80) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: a9bd7bfd stp x29, x30, [sp, #-48]! 4: 910003fd mov x29, sp 8: a90153f3 stp x19, x20, [sp, #16] c: aa0003f4 mov x20, x0 * 10: f8428e80 ldr x0, [x20, #40]! <-- trapping instruction

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2024/01/18 07:50	upstream	1b1934dbbdcf	915053c7	.config	console log	report			info	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-qemu2-arm64-mte	WARNING in ctx_sched_in

Crashes (1):

Assets (help?)