Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 4681 Comm: udevd Not tainted 6.11.0-rc4-next-20240822-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:____rb_erase_color lib/rbtree.c:354 [inline] RIP: 0010:__rb_erase_color+0x2d7/0xa30 lib/rbtree.c:413 Code: 73 02 00 00 49 8d 5c 24 10 48 89 dd 48 c1 ed 03 42 80 7c 35 00 00 74 08 48 89 df e8 43 dc 44 f6 4c 8b 2b 4d 89 ef 49 c1 ef 03 <43> 80 3c 37 00 74 08 4c 89 ef e8 2a dc 44 f6 41 f6 45 00 01 48 89 RSP: 0018:ffffc9000344f400 EFLAGS: 00010046 RAX: 000000000016e360 RBX: ffff888029ee5aa0 RCX: dffffc0000000000 RDX: ffffffff81681190 RSI: ffff888064279848 RDI: ffff888029ee5a90 RBP: 1ffff110053dcb54 R08: ffffffff901c12ef R09: 1ffffffff203825d R10: dffffc0000000000 R11: ffffffff81671e10 R12: ffff888029ee5a90 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007fb8f9d14c80(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc6df3f82d4 CR3: 000000006636c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rb_erase_augmented include/linux/rbtree_augmented.h:331 [inline] rb_erase_augmented_cached include/linux/rbtree_augmented.h:340 [inline] __dequeue_entity+0x953/0xd30 kernel/sched/fair.c:863 set_next_entity+0xfe/0x4c0 kernel/sched/fair.c:5559 set_next_task_fair+0x1dd/0x540 kernel/sched/fair.c:13151 set_next_task kernel/sched/sched.h:2434 [inline] pick_next_task kernel/sched/core.c:6085 [inline] __schedule+0x250c/0x4b30 kernel/sched/core.c:6632 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6999 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0010:arch_stack_walk+0x142/0x150 arch/x86/kernel/stacktrace.c:30 Code: 94 8d 09 00 83 bd 70 ff ff ff 00 75 d0 65 48 8b 04 25 28 00 00 00 48 3b 45 d0 75 13 48 83 c4 68 5b 41 5c 41 5d 41 5e 41 5f 5d cc cc cc cc e8 44 a6 87 0a 0f 1f 40 00 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000344f938 EFLAGS: 00000282 RAX: 49ebc948fb6cb000 RBX: ffffc9000344f990 RCX: ffffffff917a1000 RDX: ffffffff91940d00 RSI: ffffffff8c0adfc0 RDI: ffffffff8c609f20 RBP: ffffc9000344fa20 R08: ffffffff901c12ef R09: 1ffffffff203825d R10: dffffc0000000000 R11: fffffbfff203825e R12: ffffc9000344fa30 R13: dffffc0000000000 R14: ffffc9000344f980 R15: 1ffff92000689f2c stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4036 [inline] slab_alloc_node mm/slub.c:4085 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4092 getname_flags+0xb7/0x540 fs/namei.c:139 vfs_fstatat+0x12c/0x190 fs/stat.c:378 __do_sys_newfstatat fs/stat.c:543 [inline] __se_sys_newfstatat fs/stat.c:537 [inline] __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:537 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb8f99165f4 Code: 64 c7 00 09 00 00 00 83 c8 ff c3 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 00 00 00 00 41 89 ca b8 06 01 00 00 0f 05 <45> 31 c0 3d 00 f0 ff ff 76 10 48 8b 15 03 a8 0d 00 f7 d8 41 83 c8 RSP: 002b:00007ffc5cfd00b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 00007ffc5cfd1a58 RCX: 00007fb8f99165f4 RDX: 00007ffc5cfd00c8 RSI: 00007ffc5cfd0558 RDI: 00000000ffffff9c RBP: 00007ffc5cfd0158 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5cfd0558 R13: 00007ffc5cfd00c8 R14: 0000562694175910 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:____rb_erase_color lib/rbtree.c:354 [inline] RIP: 0010:__rb_erase_color+0x2d7/0xa30 lib/rbtree.c:413 Code: 73 02 00 00 49 8d 5c 24 10 48 89 dd 48 c1 ed 03 42 80 7c 35 00 00 74 08 48 89 df e8 43 dc 44 f6 4c 8b 2b 4d 89 ef 49 c1 ef 03 <43> 80 3c 37 00 74 08 4c 89 ef e8 2a dc 44 f6 41 f6 45 00 01 48 89 RSP: 0018:ffffc9000344f400 EFLAGS: 00010046 RAX: 000000000016e360 RBX: ffff888029ee5aa0 RCX: dffffc0000000000 RDX: ffffffff81681190 RSI: ffff888064279848 RDI: ffff888029ee5a90 RBP: 1ffff110053dcb54 R08: ffffffff901c12ef R09: 1ffffffff203825d R10: dffffc0000000000 R11: ffffffff81671e10 R12: ffff888029ee5a90 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007fb8f9d14c80(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc6df3f82d4 CR3: 000000006636c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 73 02 jae 0x4 2: 00 00 add %al,(%rax) 4: 49 8d 5c 24 10 lea 0x10(%r12),%rbx 9: 48 89 dd mov %rbx,%rbp c: 48 c1 ed 03 shr $0x3,%rbp 10: 42 80 7c 35 00 00 cmpb $0x0,0x0(%rbp,%r14,1) 16: 74 08 je 0x20 18: 48 89 df mov %rbx,%rdi 1b: e8 43 dc 44 f6 call 0xf644dc63 20: 4c 8b 2b mov (%rbx),%r13 23: 4d 89 ef mov %r13,%r15 26: 49 c1 ef 03 shr $0x3,%r15 * 2a: 43 80 3c 37 00 cmpb $0x0,(%r15,%r14,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 ef mov %r13,%rdi 34: e8 2a dc 44 f6 call 0xf644dc63 39: 41 f6 45 00 01 testb $0x1,0x0(%r13) 3e: 48 rex.W 3f: 89 .byte 0x89