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perf_pmu_unregister() useable") https://git.kernel.org/cgit/linux/kernel/git/peterz/queue.git perf/pmu-unregister in testcase: trinity version: trinity-x86_64-ba2360ed-1_20240923 with following parameters: runtime: 600s config: x86_64-kexec compiler: clang-18 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) +-----------------------------------------------------------+------------+------------+ | | d4187ab34e | 4cbf3df69c | +-----------------------------------------------------------+------------+------------+ | BUG:kernel_NULL_pointer_dereference,address | 0 | 15 | | Oops | 0 | 15 | | RIP:__free_event | 0 | 15 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 15 | +-----------------------------------------------------------+------------+------------+ If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202410251048.2505fe51-lkp@intel.com [ 27.301103][ T3733] BUG: kernel NULL pointer dereference, address: 0000000000000008 [ 27.302392][ T3733] #PF: supervisor write access in kernel mode [ 27.303317][ T3733] #PF: error_code(0x0002) - not-present page [ 27.304207][ T3733] PGD 80000001bfbc3067 P4D 80000001bfbc3067 PUD 1ae899067 PMD 0 [ 27.305417][ T3733] Oops: Oops: 0002 [#1] PREEMPT SMP PTI [ 27.306260][ T3733] CPU: 0 UID: 65534 PID: 3733 Comm: trinity-c0 Not tainted 6.12.0-rc2-00028-g4cbf3df69c56 #1 [ 27.307747][ T3733] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 27.309232][ T3733] RIP: 0010:__free_event (include/linux/list.h:195 include/linux/list.h:218 include/linux/list.h:229 kernel/events/core.c:5395) [ 27.310053][ T3733] Code: ff ff 4d 85 f6 74 56 49 8b 7e 28 e8 a7 af ec ff 4d 8d 7e 10 4c 89 ff e8 2b 25 ce 00 48 8b 83 18 05 00 00 48 8b 8b 20 05 00 00 <48> 89 48 08 48 89 01 48 b8 00 01 00 00 00 00 ad de 48 89 83 18 05 All code ======== 0: ff (bad) 1: ff 4d 85 decl -0x7b(%rbp) 4: f6 74 56 49 divb 0x49(%rsi,%rdx,2) 8: 8b 7e 28 mov 0x28(%rsi),%edi b: e8 a7 af ec ff call 0xffffffffffecafb7 10: 4d 8d 7e 10 lea 0x10(%r14),%r15 14: 4c 89 ff mov %r15,%rdi 17: e8 2b 25 ce 00 call 0xce2547 1c: 48 8b 83 18 05 00 00 mov 0x518(%rbx),%rax 23: 48 8b 8b 20 05 00 00 mov 0x520(%rbx),%rcx 2a:* 48 89 48 08 mov %rcx,0x8(%rax) <-- trapping instruction 2e: 48 89 01 mov %rax,(%rcx) 31: 48 b8 00 01 00 00 00 movabs $0xdead000000000100,%rax 38: 00 ad de 3b: 48 rex.W 3c: 89 .byte 0x89 3d: 83 18 05 sbbl $0x5,(%rax) Code starting with the faulting instruction =========================================== 0: 48 89 48 08 mov %rcx,0x8(%rax) 4: 48 89 01 mov %rax,(%rcx) 7: 48 b8 00 01 00 00 00 movabs $0xdead000000000100,%rax e: 00 ad de 11: 48 rex.W 12: 89 .byte 0x89 13: 83 18 05 sbbl $0x5,(%rax) [ 27.312693][ T3733] RSP: 0018:ffffc90000a1bda8 EFLAGS: 00010246 [ 27.313597][ T3733] RAX: 0000000000000000 RBX: ffff8881ae90cf90 RCX: 0000000000000000 [ 27.314773][ T3733] RDX: 0000000000000002 RSI: 0000000000000002 RDI: ffffffff82dfcc30 [ 27.316088][ T3733] RBP: 00000000000000ff R08: 0000000000000002 R09: 0000000000000000 [ 27.317342][ T3733] R10: ffff88842fc30b48 R11: ffffffff810408c0 R12: ffffffff82dfcc20 [ 27.318567][ T3733] R13: 0000000000000000 R14: ffffffff82dfcc20 R15: ffffffff82dfcc30 [ 27.319832][ T3733] FS: 00007f373e201740(0000) GS:ffff88842fc00000(0000) knlGS:0000000000000000 [ 27.321164][ T3733] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.322150][ T3733] CR2: 0000000000000008 CR3: 000000014a5b8000 CR4: 00000000000406f0 [ 27.327720][ T3733] Call Trace: [ 27.328333][ T3733] [ 27.328866][ T3733] ? __die_body (arch/x86/kernel/dumpstack.c:421) [ 27.329570][ T3733] ? page_fault_oops (arch/x86/mm/fault.c:711) [ 27.330359][ T3733] ? do_user_addr_fault (arch/x86/mm/fault.c:?) [ 27.331207][ T3733] ? __pfx_do_sync_core (arch/x86/kernel/alternative.c:2079) [ 27.332004][ T3733] ? exc_page_fault (arch/x86/include/asm/irqflags.h:37 arch/x86/include/asm/irqflags.h:92 arch/x86/mm/fault.c:1489 arch/x86/mm/fault.c:1539) [ 27.332774][ T3733] ? asm_exc_page_fault (arch/x86/include/asm/idtentry.h:623) [ 27.333605][ T3733] ? __pfx_do_sync_core (arch/x86/kernel/alternative.c:2079) [ 27.334428][ T3733] ? __free_event (include/linux/list.h:195 include/linux/list.h:218 include/linux/list.h:229 kernel/events/core.c:5395) [ 27.335253][ T3733] ? __free_event (include/linux/list.h:218 include/linux/list.h:229 kernel/events/core.c:5395) [ 27.336027][ T3733] perf_event_alloc (kernel/events/core.c:12566) [ 27.336836][ T3733] __se_sys_perf_event_open (kernel/events/core.c:12978) [ 27.337703][ T3733] ? enqueue_hrtimer (kernel/time/hrtimer.c:1093) [ 27.338512][ T3733] ? hrtimer_start_range_ns (kernel/time/hrtimer.c:1302) [ 27.339427][ T3733] do_syscall_64 (arch/x86/entry/common.c:?) [ 27.340215][ T3733] ? irqentry_exit_to_user_mode (arch/x86/include/asm/processor.h:701 arch/x86/include/asm/entry-common.h:100 include/linux/entry-common.h:364 kernel/entry/common.c:233) [ 27.341134][ T3733] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 27.342052][ T3733] RIP: 0033:0x7f373e305719 [ 27.342835][ T3733] Code: 08 89 e8 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b7 06 0d 00 f7 d8 64 89 01 48 All code ======== 0: 08 89 e8 5b 5d c3 or %cl,-0x3ca2a418(%rcx) 6: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) d: 00 00 00 10: 90 nop 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall 2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 ret 33: 48 8b 0d b7 06 0d 00 mov 0xd06b7(%rip),%rcx # 0xd06f1 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W Code starting with the faulting instruction =========================================== 0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax 6: 73 01 jae 0x9 8: c3 ret 9: 48 8b 0d b7 06 0d 00 mov 0xd06b7(%rip),%rcx # 0xd06c7 10: f7 d8 neg %eax 12: 64 89 01 mov %eax,%fs:(%rcx) 15: 48 rex.W [ 27.345728][ T3733] RSP: 002b:00007ffce1cad208 EFLAGS: 00000246 ORIG_RAX: 000000000000012a [ 27.347094][ T3733] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f373e305719 [ 27.348378][ T3733] RDX: 0000000000000001 RSI: 0000000000000136 RDI: 000055ca24f7fab0 [ 27.349658][ T3733] RBP: 00007f373cc3b058 R08: 000000000000000d R09: 0000000040000000 [ 27.350991][ T3733] R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000000012a [ 27.352312][ T3733] R13: 00007f373e2016c0 R14: 00007f373cc3b058 R15: 00007f373cc3b000 [ 27.353629][ T3733] [ 27.354206][ T3733] Modules linked in: can_bcm can_raw can cn scsi_transport_iscsi ipmi_msghandler sr_mod cdrom sg ata_generic fuse dm_mod [ 27.356119][ T3733] CR2: 0000000000000008 [ 27.356801][ T3733] ---[ end trace 0000000000000000 ]--- [ 27.357630][ T3733] RIP: 0010:__free_event (include/linux/list.h:195 include/linux/list.h:218 include/linux/list.h:229 kernel/events/core.c:5395) [ 27.358462][ T3733] Code: ff ff 4d 85 f6 74 56 49 8b 7e 28 e8 a7 af ec ff 4d 8d 7e 10 4c 89 ff e8 2b 25 ce 00 48 8b 83 18 05 00 00 48 8b 8b 20 05 00 00 <48> 89 48 08 48 89 01 48 b8 00 01 00 00 00 00 ad de 48 89 83 18 05 All code ======== 0: ff (bad) 1: ff 4d 85 decl -0x7b(%rbp) 4: f6 74 56 49 divb 0x49(%rsi,%rdx,2) 8: 8b 7e 28 mov 0x28(%rsi),%edi b: e8 a7 af ec ff call 0xffffffffffecafb7 10: 4d 8d 7e 10 lea 0x10(%r14),%r15 14: 4c 89 ff mov %r15,%rdi 17: e8 2b 25 ce 00 call 0xce2547 1c: 48 8b 83 18 05 00 00 mov 0x518(%rbx),%rax 23: 48 8b 8b 20 05 00 00 mov 0x520(%rbx),%rcx 2a:* 48 89 48 08 mov %rcx,0x8(%rax) <-- trapping instruction 2e: 48 89 01 mov %rax,(%rcx) 31: 48 b8 00 01 00 00 00 movabs $0xdead000000000100,%rax 38: 00 ad de 3b: 48 rex.W 3c: 89 .byte 0x89 3d: 83 18 05 sbbl $0x5,(%rax) Code starting with the faulting instruction =========================================== 0: 48 89 48 08 mov %rcx,0x8(%rax) 4: 48 89 01 mov %rax,(%rcx) 7: 48 b8 00 01 00 00 00 movabs $0xdead000000000100,%rax e: 00 ad de 11: 48 rex.W 12: 89 .byte 0x89 13: 83 18 05 sbbl $0x5,(%rax) The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20241025/202410251048.2505fe51-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki