loop0: detected capacity change from 0 to 1024 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000014: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000000a0-0x00000000000000a7] CPU: 0 UID: 0 PID: 5435 Comm: syz.0.33 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:is_same_group kernel/sched/fair.c:411 [inline] RIP: 0010:find_matching_se kernel/sched/fair.c:448 [inline] RIP: 0010:check_preempt_wakeup_fair+0x471/0xb00 kernel/sched/fair.c:8679 Code: 00 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 30 71 95 00 4d 8b 3f 49 8d ae a0 00 00 00 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 10 71 95 00 48 8b 5d 00 49 8d af RSP: 0018:ffffc900092df380 EFLAGS: 00010006 RAX: 0000000000000014 RBX: ffff8880b903eb00 RCX: ffffffff81671258 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88802b1b5a00 RBP: 00000000000000a0 R08: ffff88802b1b5a07 R09: 1ffff11005636b40 R10: dffffc0000000000 R11: ffffed1005636b41 R12: ffff8880b913ea40 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007ff951c246c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c42e0b4 CR3: 000000002c1b4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: wakeup_preempt+0xd8/0x2a0 kernel/sched/core.c:2128 ttwu_do_activate+0x1f8/0x7e0 kernel/sched/core.c:3666 ttwu_queue kernel/sched/core.c:3940 [inline] try_to_wake_up+0x8bc/0x1480 kernel/sched/core.c:4266 swake_up_locked kernel/sched/swait.c:29 [inline] swake_up_one+0x70/0x160 kernel/sched/swait.c:52 rcu_report_exp_rnp kernel/rcu/tree_exp.h:225 [inline] rcu_preempt_deferred_qs_irqrestore+0x89c/0xc70 kernel/rcu/tree_plugin.h:578 rcu_read_unlock_special+0x497/0x570 kernel/rcu/tree_plugin.h:692 __rcu_read_unlock+0xa1/0x110 kernel/rcu/tree_plugin.h:437 try_to_unlazy+0x307/0x5b0 fs/namei.c:792 complete_walk+0x118/0x370 fs/namei.c:897 do_open fs/namei.c:3740 [inline] path_openat+0x2722/0x3590 fs/namei.c:3933 do_filp_open+0x235/0x490 fs/namei.c:3960 do_sys_openat2+0x13e/0x1d0 fs/open.c:1416 do_sys_open fs/open.c:1431 [inline] __do_sys_openat fs/open.c:1447 [inline] __se_sys_openat fs/open.c:1442 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1442 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: 0033:0x7ff950d78810 Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 19 8f 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 6c 8f 02 00 8b 44 RSP: 002b:00007ff951c23b70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff950d78810 RDX: 0000000000000000 RSI: 00007ff951c23c10 RDI: 00000000ffffff9c RBP: 00007ff951c23c10 R08: 0000000000000000 R09: 0072736d2f232f75 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff950f15f80 R15: 00007ffc9ce27168 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:is_same_group kernel/sched/fair.c:411 [inline] RIP: 0010:find_matching_se kernel/sched/fair.c:448 [inline] RIP: 0010:check_preempt_wakeup_fair+0x471/0xb00 kernel/sched/fair.c:8679 Code: 00 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 30 71 95 00 4d 8b 3f 49 8d ae a0 00 00 00 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 10 71 95 00 48 8b 5d 00 49 8d af RSP: 0018:ffffc900092df380 EFLAGS: 00010006 RAX: 0000000000000014 RBX: ffff8880b903eb00 RCX: ffffffff81671258 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88802b1b5a00 RBP: 00000000000000a0 R08: ffff88802b1b5a07 R09: 1ffff11005636b40 R10: dffffc0000000000 R11: ffffed1005636b41 R12: ffff8880b913ea40 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007ff951c246c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c42e0b4 CR3: 000000002c1b4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 4c 89 f8 add %cl,-0x8(%rcx,%rcx,4) 6: 48 c1 e8 03 shr $0x3,%rax a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) f: 74 08 je 0x19 11: 4c 89 ff mov %r15,%rdi 14: e8 30 71 95 00 call 0x957149 19: 4d 8b 3f mov (%r15),%r15 1c: 49 8d ae a0 00 00 00 lea 0xa0(%r14),%rbp 23: 48 89 e8 mov %rbp,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 ef mov %rbp,%rdi 34: e8 10 71 95 00 call 0x957149 39: 48 8b 5d 00 mov 0x0(%rbp),%rbx 3d: 49 rex.WB 3e: 8d .byte 0x8d 3f: af scas %es:(%rdi),%eax