program: futex(&(0x7f000000cffc), 0x80000000000b, 0x0, 0x0, &(0x7f0000048000), 0x0) futex(&(0x7f000000cffc)=0x4, 0x80000000000b, 0x4, 0x0, &(0x7f0000048000), 0x0) futex(&(0x7f000000cffc), 0xc, 0x1, &(0x7f0000000280), &(0x7f0000048000)=0x5, 0x0) [ 85.506082][ T5325] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000151: 0000 [#1] SMP KASAN NOPTI [ 85.511717][ T5325] KASAN: null-ptr-deref in range [0x0000000000000a88-0x0000000000000a8f] [ 85.515441][ T5325] CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 85.519458][ T5325] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 85.524158][ T5325] RIP: 0010:kasan_byte_accessible+0x12/0x30 [ 85.526924][ T5325] Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 c0 bf 79 09 cc 66 66 66 66 66 66 2e [ 85.534949][ T5325] RSP: 0018:ffffc9000f87f840 EFLAGS: 00010002 [ 85.537490][ T5325] RAX: dffffc0000000000 RBX: ffffffff8babdd3e RCX: 0000000000000005 [ 85.541034][ T5325] RDX: 0000000000000000 RSI: ffffffff8babdd3e RDI: 0000000000000151 [ 85.544664][ T5325] RBP: ffffffff8bab7da8 R08: 0000000000000001 R09: 0000000000000000 [ 85.548189][ T5325] R10: dffffc0000000000 R11: fffff52001f0ff24 R12: 0000000000000000 [ 85.552176][ T5325] R13: 0000000000000a88 R14: 0000000000000a88 R15: 0000000000000001 [ 85.555856][ T5325] FS: 00007f4404ac46c0(0000) GS:ffff88808c88b000(0000) knlGS:0000000000000000 [ 85.560038][ T5325] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.563141][ T5325] CR2: 00007f4404ac3fe8 CR3: 0000000041c57000 CR4: 0000000000352ef0 [ 85.566619][ T5325] Call Trace: [ 85.568258][ T5325] [ 85.569562][ T5325] __kasan_check_byte+0x12/0x40 [ 85.571774][ T5325] lock_acquire+0x84/0x350 [ 85.573917][ T5325] ? lockdep_hardirqs_on+0x7a/0x110 [ 85.576403][ T5325] _raw_spin_lock+0x2e/0x40 [ 85.578501][ T5325] ? remove_waiter+0x138/0xb10 [ 85.580637][ T5325] remove_waiter+0x138/0xb10 [ 85.582811][ T5325] ? try_to_take_rt_mutex+0x4f/0xac0 [ 85.585185][ T5325] rt_mutex_start_proxy_lock+0x10a/0x230 [ 85.587671][ T5325] ? __pfx_rt_mutex_start_proxy_lock+0x10/0x10 [ 85.590472][ T5325] ? plist_add+0x4ae/0x540 [ 85.592610][ T5325] ? futex_requeue+0x1205/0x1c90 [ 85.594872][ T5325] futex_requeue+0xfb5/0x1c90 [ 85.597374][ T5325] ? __pfx_futex_requeue+0x10/0x10 [ 85.599943][ T5325] ? kasan_quarantine_put+0xbb/0x1f0 [ 85.602748][ T5325] ? tomoyo_path_number_perm+0x219/0x630 [ 85.605402][ T5325] ? do_vfs_ioctl+0x1166/0x1530 [ 85.607577][ T5325] ? __lock_acquire+0x6b5/0x2cf0 [ 85.610096][ T5325] ? do_raw_spin_lock+0x12b/0x2f0 [ 85.612572][ T5325] do_futex+0x362/0x420 [ 85.614281][ T5325] ? __pfx_do_futex+0x10/0x10 [ 85.616369][ T5325] ? do_raw_spin_lock+0x12b/0x2f0 [ 85.618495][ T5325] __se_sys_futex+0x3a8/0x450 [ 85.620486][ T5325] ? _raw_spin_unlock_irqrestore+0x30/0x80 [ 85.623137][ T5325] ? __pfx___se_sys_futex+0x10/0x10 [ 85.625517][ T5325] ? __x64_sys_futex+0x21/0xf0 [ 85.627746][ T5325] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.630560][ T5325] do_syscall_64+0x15f/0xf80 [ 85.632733][ T5325] ? trace_irq_disable+0x3b/0x140 [ 85.635016][ T5325] ? clear_bhb_loop+0x40/0x90 [ 85.637221][ T5325] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.639855][ T5325] RIP: 0033:0x7f4403b9cdd9 [ 85.641992][ T5325] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 [ 85.650651][ T5325] RSP: 002b:00007f4404ac3fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 85.654384][ T5325] RAX: ffffffffffffffda RBX: 00007f4403e16180 RCX: 00007f4403b9cdd9 [ 85.657954][ T5325] RDX: 0000000000000001 RSI: 000000000000000c RDI: 000020000000cffc [ 85.661613][ T5325] RBP: 00007f4403c32d69 R08: 0000200000048000 R09: 0000000000000000 [ 85.665103][ T5325] R10: 0000200000000280 R11: 0000000000000246 R12: 0000000000000000 [ 85.668729][ T5325] R13: 00007f4403e16218 R14: 00007f4403e16180 R15: 00007fff559df318 [ 85.672532][ T5325] [ 85.674304][ T5325] Modules linked in: [ 85.676098][ T5325] ---[ end trace 0000000000000000 ]--- [ 85.678578][ T5325] RIP: 0010:kasan_byte_accessible+0x12/0x30 [ 85.681660][ T5325] Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 e9 c0 bf 79 09 cc 66 66 66 66 66 66 2e [ 85.690235][ T5325] RSP: 0018:ffffc9000f87f840 EFLAGS: 00010002 [ 85.692743][ T5325] RAX: dffffc0000000000 RBX: ffffffff8babdd3e RCX: 0000000000000005 [ 85.695857][ T5325] RDX: 0000000000000000 RSI: ffffffff8babdd3e RDI: 0000000000000151 [ 85.699120][ T5325] RBP: ffffffff8bab7da8 R08: 0000000000000001 R09: 0000000000000000 [ 85.702620][ T5325] R10: dffffc0000000000 R11: fffff52001f0ff24 R12: 0000000000000000 [ 85.706064][ T5325] R13: 0000000000000a88 R14: 0000000000000a88 R15: 0000000000000001 [ 85.709560][ T5325] FS: 00007f4404ac46c0(0000) GS:ffff88808c88b000(0000) knlGS:0000000000000000 [ 85.713982][ T5325] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.717016][ T5325] CR2: 00007f4404ac3fe8 CR3: 0000000041c57000 CR4: 0000000000352ef0 [ 85.720694][ T5325] Kernel panic - not syncing: Fatal exception [ 85.724037][ T5325] Kernel Offset: disabled [ 85.726152][ T5325] Rebooting in 86400 seconds..