Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 UID: 0 PID: 5832 Comm: syz-executor Not tainted 6.14.0-rc7-syzkaller-00069-g81e4f8d68c66 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:dst_dev_put+0x25/0x330 net/core/dst.c:146
Code: 90 90 90 90 90 f3 0f 1e fa 41 56 41 55 41 54 55 53 48 89 fb e8 bc e0 84 f8 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 d6 02 00 00 48 8d 7b 3a 4c 8b 23 48 b8 00 00 00
RSP: 0018:ffffc90000007d40 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 0000000000000008 RCX: ffffffff89d67029
RDX: 0000000000000001 RSI: ffffffff89351194 RDI: 0000000000000008
RBP: 0000607f4762de18 R08: 0000000000000005 R09: 0000000000000007
R10: 0000000000000001 R11: 0000000000000003 R12: fffffbfff1b56291
R13: dffffc0000000000 R14: 0000607f4762de18 R15: 0000000000000001
FS: 000055557b745500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffed4d06ff8 CR3: 000000005c94a000 CR4: 0000000000350ef0
Call Trace:
rt_fibinfo_free_cpus.part.0+0xe7/0x1c0 net/ipv4/fib_semantics.c:201
rt_fibinfo_free_cpus net/ipv4/fib_semantics.c:193 [inline]
fib_nh_common_release+0x121/0x360 net/ipv4/fib_semantics.c:212
fib6_info_destroy_rcu+0x199/0x1e0 net/ipv6/ip6_fib.c:177
rcu_do_batch kernel/rcu/tree.c:2546 [inline]
rcu_core+0x7a0/0x14d0 kernel/rcu/tree.c:2802
handle_softirqs+0x216/0x8f0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:instrument_atomic_read include/linux/instrumented.h:68 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
RIP: 0010:__page_table_check_zero+0x1a3/0x360 mm/page_table_check.c:157
Code: d0 7c 08 84 d2 0f 85 99 01 00 00 44 8b 33 31 ff 44 89 f6 e8 9f 00 92 ff 45 85 f6 0f 85 50 01 00 00 e8 91 05 92 ff 4c 8d 73 04 04 00 00 00 4c 89 f7 e8 b0 4a f4 ff 4c 89 f0 48 c1 e8 03 42 0f
RSP: 0018:ffffc90002e9f7e8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff88801dd91df8 RCX: ffffffff8227ecb1
RDX: ffff8880348ebc00 RSI: ffffffff8227ecbf RDI: 0000000000000005
RBP: ffff88801dd91db0 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88801dd91dfc R15: dffffc0000000000
page_table_check_free include/linux/page_table_check.h:41 [inline]
free_pages_prepare mm/page_alloc.c:1128 [inline]
free_unref_folios+0xa99/0x1500 mm/page_alloc.c:2707
folios_put_refs+0x587/0x7b0 mm/swap.c:994
folio_batch_release include/linux/pagevec.h:101 [inline]
truncate_inode_pages_range+0x313/0xea0 mm/truncate.c:330
kill_bdev block/bdev.c:91 [inline]
blkdev_flush_mapping+0xfb/0x290 block/bdev.c:670
blkdev_put_whole+0xc4/0xf0 block/bdev.c:677
bdev_release+0x47e/0x6d0 block/bdev.c:1102
blkdev_release+0x15/0x20 block/fops.c:660
__fput+0x402/0xb70 fs/file_table.c:464
task_work_run+0x151/0x250 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f860678e497
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffed4d07298 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f860680e08c RCX: 00007f860678e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffed4d07350
RBP: 00007ffed4d07350 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffed4d083e0
R13: 00007f860680e08c R14: 000000000012fa09 R15: 00007ffed4d08420
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dst_dev_put+0x25/0x330 net/core/dst.c:146
Code: 90 90 90 90 90 f3 0f 1e fa 41 56 41 55 41 54 55 53 48 89 fb e8 bc e0 84 f8 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 d6 02 00 00 48 8d 7b 3a 4c 8b 23 48 b8 00 00 00
RSP: 0018:ffffc90000007d40 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 0000000000000008 RCX: ffffffff89d67029
RDX: 0000000000000001 RSI: ffffffff89351194 RDI: 0000000000000008
RBP: 0000607f4762de18 R08: 0000000000000005 R09: 0000000000000007
R10: 0000000000000001 R11: 0000000000000003 R12: fffffbfff1b56291
R13: dffffc0000000000 R14: 0000607f4762de18 R15: 0000000000000001
FS: 000055557b745500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffed4d06ff8 CR3: 000000005c94a000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: f3 0f 1e fa endbr64
9: 41 56 push %r14
b: 41 55 push %r13
d: 41 54 push %r12
f: 55 push %rbp
10: 53 push %rbx
11: 48 89 fb mov %rdi,%rbx
14: e8 bc e0 84 f8 call 0xf884e0d5
19: 48 89 da mov %rbx,%rdx
1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
23: fc ff df
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 d6 02 00 00 jne 0x30a
34: 48 8d 7b 3a lea 0x3a(%rbx),%rdi
38: 4c 8b 23 mov (%rbx),%r12
3b: 48 rex.W
3c: b8 .byte 0xb8
3d: 00 00 add %al,(%rax)