Re: [syzbot] [netfilter?] WARNING: ODEBUG bug in ip_set_free

syzbot
2024-02-14T09:52:03Z

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING: ODEBUG bug in ip_set_free

------------[ cut here ]------------
ODEBUG: free active (active state 0) object: 0000000062ae9ef3 object type: timer_list hint: bitmap_port_gc+0x0/0x4dc net/netfilter/ipset/ip_set_bitmap_port.c:282
WARNING: CPU: 0 PID: 6628 at lib/debugobjects.c:517 debug_print_object lib/debugobjects.c:514 [inline]
WARNING: CPU: 0 PID: 6628 at lib/debugobjects.c:517 __debug_check_no_obj_freed lib/debugobjects.c:989 [inline]
WARNING: CPU: 0 PID: 6628 at lib/debugobjects.c:517 debug_check_no_obj_freed+0x398/0x47c lib/debugobjects.c:1019
Modules linked in:
CPU: 0 PID: 6628 Comm: syz-executor.0 Not tainted 6.8.0-rc3-syzkaller-00010-gf735966ee23c-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : debug_print_object lib/debugobjects.c:514 [inline]
pc : __debug_check_no_obj_freed lib/debugobjects.c:989 [inline]
pc : debug_check_no_obj_freed+0x398/0x47c lib/debugobjects.c:1019
lr : debug_print_object lib/debugobjects.c:514 [inline]
lr : __debug_check_no_obj_freed lib/debugobjects.c:989 [inline]
lr : debug_check_no_obj_freed+0x398/0x47c lib/debugobjects.c:1019
sp : ffff8000978c6950
x29: ffff8000978c6990 x28: 0000000000000000 x27: ffff80008aeec3c0
x26: ffff0000e345d318 x25: dfff800000000000 x24: 0000000000000000
x23: ffff80009368be40 x22: ffff0000e345d000 x21: 0000000000000000
x20: ffff8000894dfe30 x19: ffff0000e345d300 x18: 1fffe000367ff596
x17: ffff80008ec6d000 x16: ffff80008031fff4 x15: 0000000000000001
x14: 1fffe00036801de8 x13: 0000000000000000 x12: 0000000000000003
x11: 0000000000000001 x10: 0000000000000003 x9 : dee47f29bae7c100
x8 : dee47f29bae7c100 x7 : ffff800080296b68 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000006 x1 : ffff80008aecd8e0 x0 : ffff800125439000
Call trace:
debug_print_object lib/debugobjects.c:514 [inline]
__debug_check_no_obj_freed lib/debugobjects.c:989 [inline]
debug_check_no_obj_freed+0x398/0x47c lib/debugobjects.c:1019
slab_free_hook mm/slub.c:2093 [inline]
slab_free mm/slub.c:4299 [inline]
kfree+0x114/0x3cc mm/slub.c:4409
kvfree+0x40/0x50 mm/util.c:663
ip_set_free+0x28/0x7c net/netfilter/ipset/ip_set_core.c:264
bitmap_port_destroy+0xe4/0x324 net/netfilter/ipset/ip_set_bitmap_gen.h:66
ip_set_create+0x904/0xf48 net/netfilter/ipset/ip_set_core.c:1157
nfnetlink_rcv_msg+0xa78/0xf80 net/netfilter/nfnetlink.c:302
netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2543
nfnetlink_rcv+0x21c/0x1ed0 net/netfilter/nfnetlink.c:659
netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]
netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1367
netlink_sendmsg+0x83c/0xb20 net/netlink/af_netlink.c:1908
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0x56c/0x840 net/socket.c:2584
___sys_sendmsg net/socket.c:2638 [inline]
__sys_sendmsg+0x26c/0x33c net/socket.c:2667
__do_sys_sendmsg net/socket.c:2676 [inline]
__se_sys_sendmsg net/socket.c:2674 [inline]
__arm64_sys_sendmsg+0x80/0x94 net/socket.c:2674
__invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
irq event stamp: 294
hardirqs last enabled at (293): [<ffff800080296c08>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1397 [inline]
hardirqs last enabled at (293): [<ffff800080296c08>] finish_lock_switch+0xbc/0x1e4 kernel/sched/core.c:5154
hardirqs last disabled at (294): [<ffff80008ad60eac>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:436
softirqs last enabled at (276): [<ffff80008002189c>] softirq_handle_end kernel/softirq.c:399 [inline]
softirqs last enabled at (276): [<ffff80008002189c>] __do_softirq+0xac8/0xce4 kernel/softirq.c:582
softirqs last disabled at (147): [<ffff80008002ab48>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81
---[ end trace 0000000000000000 ]---

Tested on:

commit: f735966e Merge branches 'for-next/reorg-va-space' and ..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=10afd01c180000
kernel config: https://syzkaller.appspot.com/x/.config?x=d47605a39da2cf06
dashboard link: https://syzkaller.appspot.com/bug?extid=ebbab3e04c88fa141e6b
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64
patch: https://syzkaller.appspot.com/x/patch.diff?x=10de0934180000