------------[ cut here ]------------ kernel BUG at mm/slub.c:4064! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 1166 Comm: syz.1.220 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:kfree+0x255/0x260 mm/slub.c:308 Code: ff d0 49 8b 07 49 83 c7 18 48 85 c0 75 e8 65 ff 0d 7c 9d 75 7e 48 89 df 0f 85 dc fd ff ff e8 92 57 73 ff e9 d2 fd ff ff 0f 0b <0f> 0b 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 RSP: 0018:ffff8881f6e09ca0 EFLAGS: 00010046 RAX: ffffea0007db8248 RBX: 0000000000000000 RCX: ffffea0007db8240 RDX: 0000000000000103 RSI: 0000000000000103 RDI: ffff8881f6e09e00 RBP: ffff8881f6e09ce0 R08: 0000000000000004 R09: 0000000000000003 R10: ffffed103edc134c R11: 1ffff1103edc134c R12: 00000000ffff99b0 R13: dffffc0000000000 R14: ffffffff84224a2b R15: ffffea0007db8240 FS: 00007f54343d86c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555593eb14a8 CR3: 00000001e5d8f000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: kobject_uevent_env+0x34b/0x6e0 lib/kobject_uevent.c:641 expire_timers kernel/time/timer.c:1488 [inline] __run_timers+0x84b/0xb60 kernel/time/timer.c:1817 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1830 __do_softirq+0x236/0x660 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x197/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:539 [inline] smp_apic_timer_interrupt+0x11d/0x490 arch/x86/kernel/apic/apic.c:1161 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:834 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x50 kernel/kcov.c:186 Code: 00 00 55 48 89 e5 be 0c 00 00 00 48 c7 c7 00 96 d1 85 e8 6b f2 2d 00 5d c3 00 00 90 90 00 00 90 90 00 55 48 89 e5 48 8b 45 08 <65> 48 8b 0d 90 0e a3 7e 65 8b 15 95 0e a3 7e f7 c2 00 01 1f 00 74 RSP: 0018:ffff8881e222f830 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffffffff81848888 RBX: dead000000000100 RCX: 0000000000000002 RDX: ffff8881e44e1f80 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8881e222f830 R08: dffffc0000000000 R09: fffff94000ec347f R10: fffff94000ec347f R11: 1ffffd4000ec347e R12: 1ffffd4000ec3479 R13: dffffc0000000000 R14: ffffea000761a3c0 R15: 80000001d868f007 compound_head include/linux/page-flags.h:176 [inline] PageSwapBacked include/linux/page-flags.h:340 [inline] mm_counter_file include/linux/mm.h:1794 [inline] mm_counter include/linux/mm.h:1803 [inline] copy_one_pte mm/memory.c:806 [inline] copy_pte_range mm/memory.c:855 [inline] copy_pmd_range mm/memory.c:906 [inline] copy_pud_range mm/memory.c:940 [inline] copy_p4d_range mm/memory.c:962 [inline] copy_page_range+0xf28/0x1730 mm/memory.c:1024 dup_mmap kernel/fork.c:608 [inline] dup_mm kernel/fork.c:1379 [inline] copy_mm+0xb65/0x1150 kernel/fork.c:1435 copy_process+0x1163/0x2cf0 kernel/fork.c:2052 _do_fork+0x190/0x860 kernel/fork.c:2399 __do_sys_clone kernel/fork.c:2557 [inline] __se_sys_clone kernel/fork.c:2538 [inline] __x64_sys_clone+0x12e/0x160 kernel/fork.c:2538 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x5c/0xc1 RIP: 0033:0x7f5435d6f969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f54343d7fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f5435f96fa0 RCX: 00007f5435d6f969 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00007f5435df1ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5435f96fa0 R15: 00007ffdba92b378 Modules linked in: ---[ end trace 2b4f545c445e55d6 ]--- RIP: 0010:kfree+0x255/0x260 mm/slub.c:308 Code: ff d0 49 8b 07 49 83 c7 18 48 85 c0 75 e8 65 ff 0d 7c 9d 75 7e 48 89 df 0f 85 dc fd ff ff e8 92 57 73 ff e9 d2 fd ff ff 0f 0b <0f> 0b 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 RSP: 0018:ffff8881f6e09ca0 EFLAGS: 00010046 RAX: ffffea0007db8248 RBX: 0000000000000000 RCX: ffffea0007db8240 RDX: 0000000000000103 RSI: 0000000000000103 RDI: ffff8881f6e09e00 RBP: ffff8881f6e09ce0 R08: 0000000000000004 R09: 0000000000000003 R10: ffffed103edc134c R11: 1ffff1103edc134c R12: 00000000ffff99b0 R13: dffffc0000000000 R14: ffffffff84224a2b R15: ffffea0007db8240 FS: 00007f54343d86c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555593eb14a8 CR3: 00000001e5d8f000 CR4: 00000000003406b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 55 push %rbp 3: 48 89 e5 mov %rsp,%rbp 6: be 0c 00 00 00 mov $0xc,%esi b: 48 c7 c7 00 96 d1 85 mov $0xffffffff85d19600,%rdi 12: e8 6b f2 2d 00 call 0x2df282 17: 5d pop %rbp 18: c3 ret 19: 00 00 add %al,(%rax) 1b: 90 nop 1c: 90 nop 1d: 00 00 add %al,(%rax) 1f: 90 nop 20: 90 nop 21: 00 55 48 add %dl,0x48(%rbp) 24: 89 e5 mov %esp,%ebp 26: 48 8b 45 08 mov 0x8(%rbp),%rax * 2a: 65 48 8b 0d 90 0e a3 mov %gs:0x7ea30e90(%rip),%rcx # 0x7ea30ec2 <-- trapping instruction 31: 7e 32: 65 8b 15 95 0e a3 7e mov %gs:0x7ea30e95(%rip),%edx # 0x7ea30ece 39: f7 c2 00 01 1f 00 test $0x1f0100,%edx 3f: 74 .byte 0x74