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: 0 UID: 0 PID: 8899 Comm: syz-executor Not tainted 6.11.0-rc4-next-20240821-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 73 5a 46 f6 4c 8b 2b 4d 89 ef 49 c1 ef 03 <43> 80 3c 37 00 74 08 4c 89 ef e8 5a 5a 46 f6 41 f6 45 00 01 48 89 RSP: 0018:ffffc9000ab97860 EFLAGS: 00010046 RAX: 000000000016e360 RBX: ffff88807d0f1ea0 RCX: dffffc0000000000 RDX: ffffffff816818f0 RSI: ffff8880b913eb48 RDI: ffff88807d0f1e90 RBP: 1ffff1100fa1e3d4 R08: ffffffff901c0c6f R09: 1ffffffff203818d R10: dffffc0000000000 R11: fffffbfff203818e R12: ffff88807d0f1e90 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 000055557ed2a500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa884c1d724 CR3: 0000000011e00000 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:apparmor_path_symlink+0x4/0x2a0 security/apparmor/lsm.c:358 Code: fe ff ff e8 be 22 8b fd e9 9f fe ff ff e8 a4 5a 4c 07 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 00 RSP: 0018:ffffc9000ab97da0 EFLAGS: 00000293 RAX: ffffffff84662359 RBX: 0000000000000000 RCX: ffff88802ae55a00 RDX: ffff888023431120 RSI: ffff888062792758 RDI: ffffc9000ab97e60 RBP: 0000000000000000 R08: ffffffff846621ba R09: 1ffffffff203818d R10: dffffc0000000000 R11: fffffbfff203818e R12: 0000000000000000 R13: ffffc9000ab97e60 R14: ffff888023431120 R15: ffff888062792758 security_path_symlink+0x1a1/0x370 security/security.c:2007 do_symlinkat+0x136/0x3a0 fs/namei.c:4639 __do_sys_symlinkat fs/namei.c:4657 [inline] __se_sys_symlinkat fs/namei.c:4654 [inline] __x64_sys_symlinkat+0x95/0xb0 fs/namei.c:4654 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: 0033:0x7fa884b793f7 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0a 01 00 00 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:00007ffcc6c76328 EFLAGS: 00000206 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa884b793f7 RDX: 00007fa884be8fd1 RSI: 00000000ffffff9c RDI: 00007ffcc6c763b0 RBP: 00007ffcc6c7635c R08: 0000000000000013 R09: 00007ffcc6c76077 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000029209 R14: 00000000000291af R15: 00007ffcc6c763b0 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 73 5a 46 f6 4c 8b 2b 4d 89 ef 49 c1 ef 03 <43> 80 3c 37 00 74 08 4c 89 ef e8 5a 5a 46 f6 41 f6 45 00 01 48 89 RSP: 0018:ffffc9000ab97860 EFLAGS: 00010046 RAX: 000000000016e360 RBX: ffff88807d0f1ea0 RCX: dffffc0000000000 RDX: ffffffff816818f0 RSI: ffff8880b913eb48 RDI: ffff88807d0f1e90 RBP: 1ffff1100fa1e3d4 R08: ffffffff901c0c6f R09: 1ffffffff203818d R10: dffffc0000000000 R11: fffffbfff203818e R12: ffff88807d0f1e90 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 000055557ed2a500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa884c1d724 CR3: 0000000011e00000 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 73 5a 46 f6 call 0xf6465a93 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 5a 5a 46 f6 call 0xf6465a93 39: 41 f6 45 00 01 testb $0x1,0x0(%r13) 3e: 48 rex.W 3f: 89 .byte 0x89