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: 6145 Comm: syz.4.137 Not tainted 6.11.0-rc4-next-20240823-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:rb_set_parent_color include/linux/rbtree_augmented.h:191 [inline] RIP: 0010:____rb_erase_color lib/rbtree.c:255 [inline] RIP: 0010:rb_erase+0x530/0xe70 lib/rbtree.c:445 Code: 00 00 74 08 4c 89 ef e8 de c5 44 f6 4d 89 7d 00 49 8d 6f 01 48 8b 5c 24 08 48 89 d8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df <42> 80 3c 28 00 74 08 48 89 df e8 b1 c5 44 f6 48 89 2b 4c 89 fd 48 RSP: 0018:ffffc9000424f560 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: dffffc0000000000 RSI: ffff8880b903f860 RDI: ffff8880646e02c8 RBP: ffff8880260002c1 R08: ffff8880646e0007 R09: 1ffff1100c8dc000 R10: dffffc0000000000 R11: ffffed100c8dc001 R12: ffff8880260002c0 R13: dffffc0000000000 R14: 1ffff11004c00058 R15: ffff8880260002c0 FS: 00007ff43ced86c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020035000 CR3: 000000007d8d2000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sched_core_dequeue kernel/sched/core.c:283 [inline] dequeue_task+0x34d/0x550 kernel/sched/core.c:2031 block_task kernel/sched/core.c:2079 [inline] __schedule+0x5d9/0x4b30 kernel/sched/core.c:6627 __schedule_loop kernel/sched/core.c:6754 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6769 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2559 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion_killable+0x3d1/0x730 kernel/sched/completion.c:254 virtio_read+0x102/0x200 drivers/char/hw_random/virtio-rng.c:105 rng_get_data drivers/char/hw_random/core.c:185 [inline] rng_dev_read+0x248/0x6d0 drivers/char/hw_random/core.c:223 do_loop_readv_writev fs/read_write.c:761 [inline] vfs_readv+0x6c2/0xa90 fs/read_write.c:934 do_preadv fs/read_write.c:1049 [inline] __do_sys_preadv fs/read_write.c:1099 [inline] __se_sys_preadv fs/read_write.c:1094 [inline] __x64_sys_preadv+0x1c7/0x2d0 fs/read_write.c:1094 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: 0033:0x7ff43c179e79 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff43ced8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007ff43c315f80 RCX: 00007ff43c179e79 RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000003 RBP: 00007ff43c1e793e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff43c315f80 R15: 00007ffccf86aca8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:rb_set_parent_color include/linux/rbtree_augmented.h:191 [inline] RIP: 0010:____rb_erase_color lib/rbtree.c:255 [inline] RIP: 0010:rb_erase+0x530/0xe70 lib/rbtree.c:445 Code: 00 00 74 08 4c 89 ef e8 de c5 44 f6 4d 89 7d 00 49 8d 6f 01 48 8b 5c 24 08 48 89 d8 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df <42> 80 3c 28 00 74 08 48 89 df e8 b1 c5 44 f6 48 89 2b 4c 89 fd 48 RSP: 0018:ffffc9000424f560 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: dffffc0000000000 RSI: ffff8880b903f860 RDI: ffff8880646e02c8 RBP: ffff8880260002c1 R08: ffff8880646e0007 R09: 1ffff1100c8dc000 R10: dffffc0000000000 R11: ffffed100c8dc001 R12: ffff8880260002c0 R13: dffffc0000000000 R14: 1ffff11004c00058 R15: ffff8880260002c0 FS: 00007ff43ced86c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020035000 CR3: 000000007d8d2000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 74 08 je 0xc 4: 4c 89 ef mov %r13,%rdi 7: e8 de c5 44 f6 call 0xf644c5ea c: 4d 89 7d 00 mov %r15,0x0(%r13) 10: 49 8d 6f 01 lea 0x1(%r15),%rbp 14: 48 8b 5c 24 08 mov 0x8(%rsp),%rbx 19: 48 89 d8 mov %rbx,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13 27: fc ff df * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 b1 c5 44 f6 call 0xf644c5ea 39: 48 89 2b mov %rbp,(%rbx) 3c: 4c 89 fd mov %r15,%rbp 3f: 48 rex.W