================================================================== BUG: KASAN: stack-out-of-bounds in profile_pc+0x186/0x1a0 arch/x86/kernel/time.c:44 Read of size 8 at addr ffffc90004507ba0 by task syz-executor/29896 CPU: 0 PID: 29896 Comm: syz-executor Not tainted 6.10.0-rc5-syzkaller-00021-g24ca36a562d6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 profile_pc+0x186/0x1a0 arch/x86/kernel/time.c:44 profile_tick+0xd3/0x140 kernel/profile.c:339 tick_sched_handle kernel/time/tick-sched.c:277 [inline] tick_nohz_handler+0x380/0x530 kernel/time/tick-sched.c:297 __run_hrtimer kernel/time/hrtimer.c:1687 [inline] __hrtimer_run_queues+0x65a/0xcc0 kernel/time/hrtimer.c:1751 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1813 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x112/0x450 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:queued_read_lock_slowpath+0x135/0x2b1 kernel/locking/qrwlock.c:51 Code: 00 8b 03 84 c0 74 36 48 b8 00 00 00 00 00 fc ff df 49 89 de 48 89 dd 49 c1 ee 03 83 e5 07 49 01 c6 83 c5 03 f3 90 41 0f b6 06 <40> 38 c5 7c 08 84 c0 0f 85 1f 01 00 00 8b 03 84 c0 75 e7 48 c7 c0 RSP: 0018:ffffc90004507b98 EFLAGS: 00000286 RAX: 0000000000000000 RBX: ffffffff8d80a080 RCX: ffffffff8aec0e9b RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8d80a080 RBP: 0000000000000003 R08: 0000000000000001 R09: fffffbfff1b01410 R10: ffffffff8d80a083 R11: 0000000000000000 R12: 1ffff920008a0f74 R13: ffffffff8d80a084 R14: fffffbfff1b01410 R15: ffffffff8152e4d9 __do_wait+0x105/0x890 kernel/exit.c:1583 do_wait+0x219/0x570 kernel/exit.c:1627 kernel_wait4+0x16c/0x280 kernel/exit.c:1786 __do_sys_wait4+0x15f/0x170 kernel/exit.c:1814 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7a8d76be17 Code: 89 7c 24 10 48 89 4c 24 18 e8 85 14 03 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 d5 14 03 00 8b 44 RSP: 002b:00007fffeae60700 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 000000000000009b RCX: 00007f7a8d76be17 RDX: 0000000040000001 RSI: 00007fffeae6077c RDI: 00000000ffffffff RBP: 00007fffeae6077c R08: 0000000000000000 R09: 00007f7a8e585080 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 0000000000371d93 R14: 0000000000371cf7 R15: 00007fffeae607e0 The buggy address belongs to stack of task syz-executor/29896 and is located at offset 0 in frame: queued_read_lock_slowpath+0x0/0x2b1 This frame has 1 object: [32, 36) 'val' The buggy address belongs to the virtual mapping at [ffffc90004500000, ffffc90004509000) created by: kernel_clone+0xfd/0x980 kernel/fork.c:2797 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802d7f0ba0 pfn:0x2d7f0 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: ffff88802d7f0ba0 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 29857, tgid 29857 (syz.1.7049), ts 3519148734044, free_ts 3509164542276 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x136a/0x2e50 mm/page_alloc.c:3420 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4678 alloc_pages_mpol_noprof+0x275/0x610 mm/mempolicy.c:2265 vm_area_alloc_pages mm/vmalloc.c:3566 [inline] __vmalloc_area_node mm/vmalloc.c:3642 [inline] __vmalloc_node_range_noprof+0xa6a/0x1520 mm/vmalloc.c:3823 alloc_thread_stack_node kernel/fork.c:309 [inline] dup_task_struct kernel/fork.c:1115 [inline] copy_process+0x2f38/0x8f10 kernel/fork.c:2220 kernel_clone+0xfd/0x980 kernel/fork.c:2797 __do_sys_clone3+0x1f5/0x270 kernel/fork.c:3098 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 29725 tgid 29722 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_folios+0x991/0x1310 mm/page_alloc.c:2632 folios_put_refs+0x487/0x6d0 mm/swap.c:1024 free_pages_and_swap_cache+0x36d/0x510 mm/swap_state.c:329 __tlb_batch_free_encoded_pages+0xf9/0x290 mm/mmu_gather.c:136 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu mm/mmu_gather.c:373 [inline] tlb_finish_mmu+0x168/0x7b0 mm/mmu_gather.c:465 exit_mmap+0x3d1/0xb20 mm/mmap.c:3354 __mmput+0x12a/0x4d0 kernel/fork.c:1346 mmput+0x62/0x70 kernel/fork.c:1368 exit_mm kernel/exit.c:565 [inline] do_exit+0x9b7/0x2ba0 kernel/exit.c:861 do_group_exit+0xd3/0x2a0 kernel/exit.c:1023 get_signal+0x2616/0x2710 kernel/signal.c:2909 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffffc90004507a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004507b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90004507b80: 00 00 00 00 f1 f1 f1 f1 04 f3 f3 f3 00 00 00 00 ^ ffffc90004507c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004507c80: 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 ================================================================== ================================================================== BUG: KASAN: stack-out-of-bounds in profile_pc+0x186/0x1a0 arch/x86/kernel/time.c:44 Read of size 8 at addr ffffc90004507ba0 by task syz-executor/29896 CPU: 0 PID: 29896 Comm: syz-executor Tainted: G B 6.10.0-rc5-syzkaller-00021-g24ca36a562d6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 profile_pc+0x186/0x1a0 arch/x86/kernel/time.c:44 profile_tick+0xd3/0x140 kernel/profile.c:339 tick_sched_handle kernel/time/tick-sched.c:277 [inline] tick_nohz_handler+0x380/0x530 kernel/time/tick-sched.c:297 __run_hrtimer kernel/time/hrtimer.c:1687 [inline] __hrtimer_run_queues+0x65a/0xcc0 kernel/time/hrtimer.c:1751 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1813 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x112/0x450 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:queued_read_lock_slowpath+0x135/0x2b1 kernel/locking/qrwlock.c:51 Code: 00 8b 03 84 c0 74 36 48 b8 00 00 00 00 00 fc ff df 49 89 de 48 89 dd 49 c1 ee 03 83 e5 07 49 01 c6 83 c5 03 f3 90 41 0f b6 06 <40> 38 c5 7c 08 84 c0 0f 85 1f 01 00 00 8b 03 84 c0 75 e7 48 c7 c0 RSP: 0018:ffffc90004507b98 EFLAGS: 00000286 RAX: 0000000000000000 RBX: ffffffff8d80a080 RCX: ffffffff8aec0e9b RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8d80a080 RBP: 0000000000000003 R08: 0000000000000001 R09: fffffbfff1b01410 R10: ffffffff8d80a083 R11: 0000000000000000 R12: 1ffff920008a0f74 R13: ffffffff8d80a084 R14: fffffbfff1b01410 R15: ffffffff8152e4d9 __do_wait+0x105/0x890 kernel/exit.c:1583 do_wait+0x219/0x570 kernel/exit.c:1627 kernel_wait4+0x16c/0x280 kernel/exit.c:1786 __do_sys_wait4+0x15f/0x170 kernel/exit.c:1814 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7a8d76be17 Code: 89 7c 24 10 48 89 4c 24 18 e8 85 14 03 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 d5 14 03 00 8b 44 RSP: 002b:00007fffeae60700 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 000000000000009b RCX: 00007f7a8d76be17 RDX: 0000000040000001 RSI: 00007fffeae6077c RDI: 00000000ffffffff RBP: 00007fffeae6077c R08: 0000000000000000 R09: 00007f7a8e585080 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 0000000000371d93 R14: 0000000000371cf7 R15: 00007fffeae607e0 The buggy address belongs to stack of task syz-executor/29896 and is located at offset 0 in frame: queued_read_lock_slowpath+0x0/0x2b1 This frame has 1 object: [32, 36) 'val' The buggy address belongs to the virtual mapping at [ffffc90004500000, ffffc90004509000) created by: kernel_clone+0xfd/0x980 kernel/fork.c:2797 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802d7f0ba0 pfn:0x2d7f0 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: ffff88802d7f0ba0 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 29857, tgid 29857 (syz.1.7049), ts 3519148734044, free_ts 3509164542276 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x136a/0x2e50 mm/page_alloc.c:3420 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4678 alloc_pages_mpol_noprof+0x275/0x610 mm/mempolicy.c:2265 vm_area_alloc_pages mm/vmalloc.c:3566 [inline] __vmalloc_area_node mm/vmalloc.c:3642 [inline] __vmalloc_node_range_noprof+0xa6a/0x1520 mm/vmalloc.c:3823 alloc_thread_stack_node kernel/fork.c:309 [inline] dup_task_struct kernel/fork.c:1115 [inline] copy_process+0x2f38/0x8f10 kernel/fork.c:2220 kernel_clone+0xfd/0x980 kernel/fork.c:2797 __do_sys_clone3+0x1f5/0x270 kernel/fork.c:3098 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 29725 tgid 29722 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_folios+0x991/0x1310 mm/page_alloc.c:2632 folios_put_refs+0x487/0x6d0 mm/swap.c:1024 free_pages_and_swap_cache+0x36d/0x510 mm/swap_state.c:329 __tlb_batch_free_encoded_pages+0xf9/0x290 mm/mmu_gather.c:136 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu mm/mmu_gather.c:373 [inline] tlb_finish_mmu+0x168/0x7b0 mm/mmu_gather.c:465 exit_mmap+0x3d1/0xb20 mm/mmap.c:3354 __mmput+0x12a/0x4d0 kernel/fork.c:1346 mmput+0x62/0x70 kernel/fork.c:1368 exit_mm kernel/exit.c:565 [inline] do_exit+0x9b7/0x2ba0 kernel/exit.c:861 do_group_exit+0xd3/0x2a0 kernel/exit.c:1023 get_signal+0x2616/0x2710 kernel/signal.c:2909 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffffc90004507a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004507b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90004507b80: 00 00 00 00 f1 f1 f1 f1 04 f3 f3 f3 00 00 00 00 ^ ffffc90004507c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004507c80: 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 ================================================================== ================================================================== BUG: KASAN: stack-out-of-bounds in profile_pc+0x186/0x1a0 arch/x86/kernel/time.c:44 Read of size 8 at addr ffffc90004507ba0 by task syz-executor/29896 CPU: 0 PID: 29896 Comm: syz-executor Tainted: G B 6.10.0-rc5-syzkaller-00021-g24ca36a562d6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 profile_pc+0x186/0x1a0 arch/x86/kernel/time.c:44 profile_tick+0xd3/0x140 kernel/profile.c:339 tick_sched_handle kernel/time/tick-sched.c:277 [inline] tick_nohz_handler+0x380/0x530 kernel/time/tick-sched.c:297 __run_hrtimer kernel/time/hrtimer.c:1687 [inline] __hrtimer_run_queues+0x65a/0xcc0 kernel/time/hrtimer.c:1751 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1813 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x112/0x450 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:queued_read_lock_slowpath+0x135/0x2b1 kernel/locking/qrwlock.c:51 Code: 00 8b 03 84 c0 74 36 48 b8 00 00 00 00 00 fc ff df 49 89 de 48 89 dd 49 c1 ee 03 83 e5 07 49 01 c6 83 c5 03 f3 90 41 0f b6 06 <40> 38 c5 7c 08 84 c0 0f 85 1f 01 00 00 8b 03 84 c0 75 e7 48 c7 c0 RSP: 0018:ffffc90004507b98 EFLAGS: 00000286 RAX: 0000000000000000 RBX: ffffffff8d80a080 RCX: ffffffff8aec0e9b RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8d80a080 RBP: 0000000000000003 R08: 0000000000000001 R09: fffffbfff1b01410 R10: ffffffff8d80a083 R11: 0000000000000000 R12: 1ffff920008a0f74 R13: ffffffff8d80a084 R14: fffffbfff1b01410 R15: ffffffff8152e4d9 __do_wait+0x105/0x890 kernel/exit.c:1583 do_wait+0x219/0x570 kernel/exit.c:1627 kernel_wait4+0x16c/0x280 kernel/exit.c:1786 __do_sys_wait4+0x15f/0x170 kernel/exit.c:1814 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7a8d76be17 Code: 89 7c 24 10 48 89 4c 24 18 e8 85 14 03 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 d5 14 03 00 8b 44 RSP: 002b:00007fffeae60700 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 000000000000009b RCX: 00007f7a8d76be17 RDX: 0000000040000001 RSI: 00007fffeae6077c RDI: 00000000ffffffff RBP: 00007fffeae6077c R08: 0000000000000000 R09: 00007f7a8e585080 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 0000000000371d93 R14: 0000000000371cf7 R15: 00007fffeae607e0 The buggy address belongs to stack of task syz-executor/29896 and is located at offset 0 in frame: queued_read_lock_slowpath+0x0/0x2b1 This frame has 1 object: [32, 36) 'val' The buggy address belongs to the virtual mapping at [ffffc90004500000, ffffc90004509000) created by: kernel_clone+0xfd/0x980 kernel/fork.c:2797 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802d7f0ba0 pfn:0x2d7f0 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: ffff88802d7f0ba0 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 29857, tgid 29857 (syz.1.7049), ts 3519148734044, free_ts 3509164542276 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x136a/0x2e50 mm/page_alloc.c:3420 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4678 alloc_pages_mpol_noprof+0x275/0x610 mm/mempolicy.c:2265 vm_area_alloc_pages mm/vmalloc.c:3566 [inline] __vmalloc_area_node mm/vmalloc.c:3642 [inline] __vmalloc_node_range_noprof+0xa6a/0x1520 mm/vmalloc.c:3823 alloc_thread_stack_node kernel/fork.c:309 [inline] dup_task_struct kernel/fork.c:1115 [inline] copy_process+0x2f38/0x8f10 kernel/fork.c:2220 kernel_clone+0xfd/0x980 kernel/fork.c:2797 __do_sys_clone3+0x1f5/0x270 kernel/fork.c:3098 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 29725 tgid 29722 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_folios+0x991/0x1310 mm/page_alloc.c:2632 folios_put_refs+0x487/0x6d0 mm/swap.c:1024 free_pages_and_swap_cache+0x36d/0x510 mm/swap_state.c:329 __tlb_batch_free_encoded_pages+0xf9/0x290 mm/mmu_gather.c:136 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu mm/mmu_gather.c:373 [inline] tlb_finish_mmu+0x168/0x7b0 mm/mmu_gather.c:465 exit_mmap+0x3d1/0xb20 mm/mmap.c:3354 __mmput+0x12a/0x4d0 kernel/fork.c:1346 mmput+0x62/0x70 kernel/fork.c:1368 exit_mm kernel/exit.c:565 [inline] do_exit+0x9b7/0x2ba0 kernel/exit.c:861 do_group_exit+0xd3/0x2a0 kernel/exit.c:1023 get_signal+0x2616/0x2710 kernel/signal.c:2909 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffffc90004507a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004507b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90004507b80: 00 00 00 00 f1 f1 f1 f1 04 f3 f3 f3 00 00 00 00 ^ ffffc90004507c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004507c80: 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 ================================================================== ---------------- Code disassembly (best guess): 0: 00 8b 03 84 c0 74 add %cl,0x74c08403(%rbx) 6: 36 48 b8 00 00 00 00 ss movabs $0xdffffc0000000000,%rax d: 00 fc ff df 11: 49 89 de mov %rbx,%r14 14: 48 89 dd mov %rbx,%rbp 17: 49 c1 ee 03 shr $0x3,%r14 1b: 83 e5 07 and $0x7,%ebp 1e: 49 01 c6 add %rax,%r14 21: 83 c5 03 add $0x3,%ebp 24: f3 90 pause 26: 41 0f b6 06 movzbl (%r14),%eax * 2a: 40 38 c5 cmp %al,%bpl <-- trapping instruction 2d: 7c 08 jl 0x37 2f: 84 c0 test %al,%al 31: 0f 85 1f 01 00 00 jne 0x156 37: 8b 03 mov (%rbx),%eax 39: 84 c0 test %al,%al 3b: 75 e7 jne 0x24 3d: 48 rex.W 3e: c7 .byte 0xc7 3f: c0 .byte 0xc0