Oops: general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057] CPU: 2 UID: 0 PID: 6073 Comm: syz-executor.2 Not tainted 6.14.0-syzkaller-ga1b5bd45d4ee #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:pick_next_entity kernel/sched/fair.c:5598 [inline] RIP: 0010:pick_task_fair+0xd0/0x320 kernel/sched/fair.c:8861 Code: ef e8 14 5e fc ff 85 c0 0f 85 52 01 00 00 48 89 ef e8 d4 02 fd ff 48 8d 78 51 48 89 c3 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <42> 0f b6 04 38 38 d0 7f 08 84 c0 0f 85 eb 01 00 00 80 7b 51 00 0f RSP: 0018:ffffc9000327fa50 EFLAGS: 00010002 RAX: 000000000000000a RBX: 0000000000000000 RCX: 1ffff1100511650b RDX: 0000000000000001 RSI: 1ffff11005116502 RDI: 0000000000000051 RBP: ffff8880288b2800 R08: 0000000000000000 R09: fffffbfff210c622 R10: ffffffff90863117 R11: 0000000000000001 R12: ffff88806a639dc0 R13: ffffed100d4c73d2 R14: ffff88806a639e80 R15: dffffc0000000000 FS: 0000555577a36480(0000) GS:ffff8880d6bb8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020538000 CR3: 0000000033d2e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pick_task kernel/sched/core.c:6092 [inline] pick_next_task kernel/sched/core.c:6192 [inline] __schedule+0x265a/0x5de0 kernel/sched/core.c:6720 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:6860 do_nanosleep+0x21a/0x570 kernel/time/hrtimer.c:2131 hrtimer_nanosleep+0x157/0x380 kernel/time/hrtimer.c:2178 common_nsleep+0xa1/0xd0 kernel/time/posix-timers.c:1361 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1407 [inline] __se_sys_clock_nanosleep kernel/time/posix-timers.c:1384 [inline] __x64_sys_clock_nanosleep+0x34a/0x4a0 kernel/time/posix-timers.c:1384 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8408ea7ef5 Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 b9 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f ba ff ff 48 8b 04 24 48 83 c4 28 f7 d8 RSP: 002b:00007ffc82d0ad10 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: ffffffffffffffda RBX: 0000000000000096 RCX: 00007f8408ea7ef5 RDX: 00007ffc82d0ad50 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffc82d0addc R08: 0000000000000000 R09: 00007f8409c4d000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 0000000000014ec4 R14: 0000000000014e8d R15: 0000000000000005 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:pick_next_entity kernel/sched/fair.c:5598 [inline] RIP: 0010:pick_task_fair+0xd0/0x320 kernel/sched/fair.c:8861 Code: ef e8 14 5e fc ff 85 c0 0f 85 52 01 00 00 48 89 ef e8 d4 02 fd ff 48 8d 78 51 48 89 c3 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <42> 0f b6 04 38 38 d0 7f 08 84 c0 0f 85 eb 01 00 00 80 7b 51 00 0f RSP: 0018:ffffc9000327fa50 EFLAGS: 00010002 RAX: 000000000000000a RBX: 0000000000000000 RCX: 1ffff1100511650b RDX: 0000000000000001 RSI: 1ffff11005116502 RDI: 0000000000000051 RBP: ffff8880288b2800 R08: 0000000000000000 R09: fffffbfff210c622 R10: ffffffff90863117 R11: 0000000000000001 R12: ffff88806a639dc0 R13: ffffed100d4c73d2 R14: ffff88806a639e80 R15: dffffc0000000000 FS: 0000555577a36480(0000) GS:ffff8880d6bb8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020538000 CR3: 0000000033d2e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: ef out %eax,(%dx) 1: e8 14 5e fc ff call 0xfffc5e1a 6: 85 c0 test %eax,%eax 8: 0f 85 52 01 00 00 jne 0x160 e: 48 89 ef mov %rbp,%rdi 11: e8 d4 02 fd ff call 0xfffd02ea 16: 48 8d 78 51 lea 0x51(%rax),%rdi 1a: 48 89 c3 mov %rax,%rbx 1d: 48 89 f8 mov %rdi,%rax 20: 48 89 fa mov %rdi,%rdx 23: 48 c1 e8 03 shr $0x3,%rax 27: 83 e2 07 and $0x7,%edx * 2a: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction 2f: 38 d0 cmp %dl,%al 31: 7f 08 jg 0x3b 33: 84 c0 test %al,%al 35: 0f 85 eb 01 00 00 jne 0x226 3b: 80 7b 51 00 cmpb $0x0,0x51(%rbx) 3f: 0f .byte 0xf