=============================
WARNING: suspicious RCU usage
6.8.0-rc3-syzkaller #0 Not tainted
-----------------------------
net/netfilter/ipset/ip_set_hash_gen.h:455 suspicious rcu_dereference_protected() usage!
other info that might help us debug this:
rcu_scheduler_active = 2, debug_locks = 1
8 locks held by syz-executor.1/5096:
#0: ffffffff8e1d56b0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mmap kernel/fork.c:635 [inline]
#0: ffffffff8e1d56b0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1685 [inline]
#0: ffffffff8e1d56b0 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x271/0x21b0 kernel/fork.c:1734
#1: ffff88801532ea20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:124 [inline]
#1: ffff88801532ea20 (&mm->mmap_lock){++++}-{3:3}, at: dup_mmap kernel/fork.c:636 [inline]
#1: ffff88801532ea20 (&mm->mmap_lock){++++}-{3:3}, at: dup_mm kernel/fork.c:1685 [inline]
#1: ffff88801532ea20 (&mm->mmap_lock){++++}-{3:3}, at: copy_mm+0x291/0x21b0 kernel/fork.c:1734
#2: ffff888040af3aa0 (&mm->mmap_lock/1){+.+.}-{3:3}, at: mmap_write_lock_nested include/linux/mmap_lock.h:115 [inline]
#2: ffff888040af3aa0 (&mm->mmap_lock/1){+.+.}-{3:3}, at: dup_mmap kernel/fork.c:645 [inline]
#2: ffff888040af3aa0 (&mm->mmap_lock/1){+.+.}-{3:3}, at: dup_mm kernel/fork.c:1685 [inline]
#2: ffff888040af3aa0 (&mm->mmap_lock/1){+.+.}-{3:3}, at: copy_mm+0x3cb/0x21b0 kernel/fork.c:1734
#3: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#3: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#3: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: __pte_offset_map+0x82/0x380 mm/pgtable-generic.c:285
#4: ffff88801e756ac8 (ptlock_ptr(ptdesc)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
#4: ffff88801e756ac8 (ptlock_ptr(ptdesc)#2){+.+.}-{2:2}, at: __pte_offset_map_lock+0x1ba/0x300 mm/pgtable-generic.c:373
#5: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#5: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#5: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: __pte_offset_map+0x82/0x380 mm/pgtable-generic.c:285
#6: ffff8880235bd7f8 (ptlock_ptr(ptdesc)#2/1){+.+.}-{2:2}, at: copy_pte_range mm/memory.c:1059 [inline]
#6: ffff8880235bd7f8 (ptlock_ptr(ptdesc)#2/1){+.+.}-{2:2}, at: copy_pmd_range mm/memory.c:1187 [inline]
#6: ffff8880235bd7f8 (ptlock_ptr(ptdesc)#2/1){+.+.}-{2:2}, at: copy_pud_range mm/memory.c:1224 [inline]
#6: ffff8880235bd7f8 (ptlock_ptr(ptdesc)#2/1){+.+.}-{2:2}, at: copy_p4d_range mm/memory.c:1248 [inline]
#6: ffff8880235bd7f8 (ptlock_ptr(ptdesc)#2/1){+.+.}-{2:2}, at: copy_page_range+0x108a/0x4240 mm/memory.c:1346
#7: ffffffff8e130ba0 (rcu_callback){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#7: ffffffff8e130ba0 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2184 [inline]
#7: ffffffff8e130ba0 (rcu_callback){....}-{0:0}, at: rcu_core+0xcfc/0x1810 kernel/rcu/tree.c:2465
stack backtrace:
CPU: 0 PID: 5096 Comm: syz-executor.1 Not tainted 6.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
lockdep_rcu_suspicious+0x220/0x340 kernel/locking/lockdep.c:6712
hash_netportnet6_destroy+0xf0/0x2c0 net/netfilter/ipset/ip_set_hash_gen.h:455
ip_set_destroy_set net/netfilter/ipset/ip_set_core.c:1180 [inline]
ip_set_destroy_set_rcu+0x6a/0xe0 net/netfilter/ipset/ip_set_core.c:1190
rcu_do_batch kernel/rcu/tree.c:2190 [inline]
rcu_core+0xd76/0x1810 kernel/rcu/tree.c:2465
__do_softirq+0x2bb/0x942 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu+0xf1/0x1c0 kernel/softirq.c:632
irq_exit_rcu+0x9/0x30 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x97/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x70 kernel/kcov.c:207
Code: 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 80 58 70 7e 65 8b 15 81 58 70 7e c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 fc 15 00 00
RSP: 0018:ffffc900044673c0 EFLAGS: 00000246
RAX: ffffffff81dc8fb7 RBX: 0000000000000000 RCX: ffff888021ef5940
RDX: 0000000080000002 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffffd400025e129 R08: ffffffff81dc8fa4 R09: 1ffffd400025e128
R10: dffffc0000000000 R11: fffff9400025e129 R12: ffffea00012f0948
R13: dffffc0000000000 R14: ffffea00012f0940 R15: ffffea00012f0940
arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
page_fixed_fake_head include/linux/page-flags.h:210 [inline]
_compound_head include/linux/page-flags.h:251 [inline]
__folio_rmap_sanity_checks+0x137/0x470 include/linux/rmap.h:213
__folio_dup_file_rmap include/linux/rmap.h:321 [inline]
folio_dup_file_rmap_ptes include/linux/rmap.h:348 [inline]
copy_present_pte mm/memory.c:968 [inline]
copy_pte_range mm/memory.c:1102 [inline]
copy_pmd_range mm/memory.c:1187 [inline]
copy_pud_range mm/memory.c:1224 [inline]
copy_p4d_range mm/memory.c:1248 [inline]
copy_page_range+0x13b5/0x4240 mm/memory.c:1346
dup_mmap kernel/fork.c:745 [inline]
dup_mm kernel/fork.c:1685 [inline]
copy_mm+0x12f4/0x21b0 kernel/fork.c:1734
copy_process+0x1d73/0x3fc0 kernel/fork.c:2497
kernel_clone+0x222/0x840 kernel/fork.c:2902
__do_sys_clone kernel/fork.c:3045 [inline]
__se_sys_clone kernel/fork.c:3029 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:3029
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f13aa87add3
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffd52eff378 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f13aa87add3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 000055555594f750 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
----------------
Code disassembly (best guess):
0: 0f 1f 00 nopl (%rax)
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 90 nop
a: 90 nop
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 90 nop
13: f3 0f 1e fa endbr64
17: 48 8b 04 24 mov (%rsp),%rax
1b: 65 48 8b 0d 80 58 70 mov %gs:0x7e705880(%rip),%rcx # 0x7e7058a3
22: 7e
23: 65 8b 15 81 58 70 7e mov %gs:0x7e705881(%rip),%edx # 0x7e7058ab
* 2a: f7 c2 00 01 ff 00 test $0xff0100,%edx <-- trapping instruction
30: 74 11 je 0x43
32: f7 c2 00 01 00 00 test $0x100,%edx
38: 74 35 je 0x6f
3a: 83 .byte 0x83
3b: b9 fc 15 00 00 mov $0x15fc,%ecx