Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 1 UID: 0 PID: 58 Comm: kworker/1:1 Not tainted 6.15.0-rc5-syzkaller-00204-g0e1329d4045c #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
Workqueue: events nsim_fib_event_work
RIP: 0010:nsim_fib6_rt_create drivers/net/netdevsim/fib.c:551 [inline]
RIP: 0010:nsim_fib6_rt_insert drivers/net/netdevsim/fib.c:752 [inline]
RIP: 0010:nsim_fib6_event drivers/net/netdevsim/fib.c:856 [inline]
RIP: 0010:nsim_fib_event drivers/net/netdevsim/fib.c:889 [inline]
RIP: 0010:nsim_fib_event_work+0x183b/0x2e80 drivers/net/netdevsim/fib.c:1493
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 e6 11 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 2e 48 8d 7d 10 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e cb 11 00 00 49 8d 46 60 8b 6d
RSP: 0018:ffffc90000affb10 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88803129e980 RCX: ffff888050f5e0a0
RDX: 0000000000000002 RSI: ffffffff87129e98 RDI: 0000000000000010
RBP: 0000000000000000 R08: ffffffff911324ce R09: ffff88816d4b40b0
R10: 0000000000000003 R11: 0000000000002bb0 R12: ffff88804f9a6be0
R13: 0000000000000001 R14: ffff8880428dc000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880d6ae1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000004ca000 CR3: 00000000599a9000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:nsim_fib6_rt_create drivers/net/netdevsim/fib.c:551 [inline]
RIP: 0010:nsim_fib6_rt_insert drivers/net/netdevsim/fib.c:752 [inline]
RIP: 0010:nsim_fib6_event drivers/net/netdevsim/fib.c:856 [inline]
RIP: 0010:nsim_fib_event drivers/net/netdevsim/fib.c:889 [inline]
RIP: 0010:nsim_fib_event_work+0x183b/0x2e80 drivers/net/netdevsim/fib.c:1493
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 e6 11 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 2e 48 8d 7d 10 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e cb 11 00 00 49 8d 46 60 8b 6d
RSP: 0018:ffffc90000affb10 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88803129e980 RCX: ffff888050f5e0a0
RDX: 0000000000000002 RSI: ffffffff87129e98 RDI: 0000000000000010
RBP: 0000000000000000 R08: ffffffff911324ce R09: ffff88816d4b40b0
R10: 0000000000000003 R11: 0000000000002bb0 R12: ffff88804f9a6be0
R13: 0000000000000001 R14: ffff8880428dc000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880d6ae1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005624703c6b00 CR3: 000000000e180000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 4 bytes skipped:
0: 48 c1 ea 03 shr $0x3,%rdx
4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
8: 0f 85 e6 11 00 00 jne 0x11f4
e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
15: fc ff df
18: 49 8b 2e mov (%r14),%rbp
1b: 48 8d 7d 10 lea 0x10(%rbp),%rdi
1f: 48 89 fa mov %rdi,%rdx
22: 48 c1 ea 03 shr $0x3,%rdx
* 26: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2a: 84 c0 test %al,%al
2c: 74 08 je 0x36
2e: 3c 03 cmp $0x3,%al
30: 0f 8e cb 11 00 00 jle 0x1201
36: 49 8d 46 60 lea 0x60(%r14),%rax
3a: 8b .byte 0x8b
3b: 6d insl (%dx),%es:(%rdi)