[syzbot] [bpf?] [net?] WARNING in __sock_map_delete

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 66a27abac311 Merge tag 'powerpc-6.9-1' of git://git.kernel..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12252985180000
kernel config: https://syzkaller.appspot.com/x/.config?x=1ef5fbdba17e3dbc
dashboard link: https://syzkaller.appspot.com/bug?extid=ca1c5a4609c82306ce19
compiler: arm-linux-gnueabi-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1138c2a5180000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=103089a5180000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/8ead8862021c/non_bootable_disk-66a27aba.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/611e73ba3400/vmlinux-66a27aba.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8e0bfa57ae67/zImage-66a27aba.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ca1c5a...@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 4390 at kernel/softirq.c:361 __local_bh_enable_ip+0xa0/0xd0 kernel/softirq.c:361
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 PID: 4390 Comm: syz-executor407 Not tainted 6.8.0-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: frame pointer underflow
[<81863324>] (dump_backtrace) from [<81863420>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
r7:00000000 r6:82622e44 r5:00000000 r4:81fc0df8
[<81863408>] (show_stack) from [<81880b84>] (__dump_stack lib/dump_stack.c:88 [inline])
[<81863408>] (show_stack) from [<81880b84>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:114)
[<81880b30>] (dump_stack_lvl) from [<81880bc4>] (dump_stack+0x18/0x1c lib/dump_stack.c:123)
r5:00000000 r4:82858d18
[<81880bac>] (dump_stack) from [<81863ec8>] (panic+0x120/0x358 kernel/panic.c:348)
[<81863da8>] (panic) from [<8024388c>] (check_panic_on_warn kernel/panic.c:241 [inline])
[<81863da8>] (panic) from [<8024388c>] (print_tainted+0x0/0xa0 kernel/panic.c:236)
r3:8260c584 r2:00000001 r1:81fa9b44 r0:81fb16ec
r7:8024c6d0
[<80243818>] (check_panic_on_warn) from [<80243a80>] (__warn+0x7c/0x180 kernel/panic.c:694)
[<80243a04>] (__warn) from [<80243cfc>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:719)
r8:00000009 r7:81fb2024 r6:df801c6c r5:84900000 r4:00000000
[<80243b88>] (warn_slowpath_fmt) from [<8024c6d0>] (__local_bh_enable_ip+0xa0/0xd0 kernel/softirq.c:361)
r10:8260c590 r9:00000000 r8:00000008 r7:00000000 r6:00000000 r5:00000201
r4:84900000
[<8024c630>] (__local_bh_enable_ip) from [<8188db78>] (__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline])
[<8024c630>] (__local_bh_enable_ip) from [<8188db78>] (_raw_spin_unlock_bh+0x34/0x38 kernel/locking/spinlock.c:210)
r5:847941cc r4:ffffffea
[<8188db44>] (_raw_spin_unlock_bh) from [<813fd618>] (spin_unlock_bh include/linux/spinlock.h:396 [inline])
[<8188db44>] (_raw_spin_unlock_bh) from [<813fd618>] (__sock_map_delete+0x4c/0x84 net/core/sock_map.c:424)
[<813fd5cc>] (__sock_map_delete) from [<813fd67c>] (sock_map_delete_elem+0x2c/0x38 net/core/sock_map.c:446)
r7:00000000 r6:803c0bb4 r5:8092da0c r4:dfcb3000
[<813fd650>] (sock_map_delete_elem) from [<803c0bd0>] (____bpf_map_delete_elem kernel/bpf/helpers.c:77 [inline])
[<813fd650>] (sock_map_delete_elem) from [<803c0bd0>] (bpf_map_delete_elem+0x1c/0x24 kernel/bpf/helpers.c:73)
[<803c0bb4>] (bpf_map_delete_elem) from [<7f08516c>] (bpf_prog_2c29ac5cdc6b1842+0xc8/0xd4)
[<7f0850a4>] (bpf_prog_2c29ac5cdc6b1842) from [<8037c7b0>] (bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline])
[<7f0850a4>] (bpf_prog_2c29ac5cdc6b1842) from [<8037c7b0>] (__bpf_prog_run include/linux/filter.h:657 [inline])
[<7f0850a4>] (bpf_prog_2c29ac5cdc6b1842) from [<8037c7b0>] (bpf_prog_run include/linux/filter.h:664 [inline])
[<7f0850a4>] (bpf_prog_2c29ac5cdc6b1842) from [<8037c7b0>] (__bpf_trace_run kernel/trace/bpf_trace.c:2381 [inline])
[<7f0850a4>] (bpf_prog_2c29ac5cdc6b1842) from [<8037c7b0>] (bpf_trace_run2+0x70/0x158 kernel/trace/bpf_trace.c:2420)
r9:844a74c0 r8:00000030 r7:8092da0c r6:844a74c0 r5:8092da0c r4:dfcb3000
[<8037c740>] (bpf_trace_run2) from [<80464c58>] (__bpf_trace_kfree+0x28/0x30 include/trace/events/kmem.h:94)
r8:00000030 r7:8092da0c r6:844a74c0 r5:8092da0c r4:844a7a08
[<80464c30>] (__bpf_trace_kfree) from [<804629ac>] (__traceiter_kfree+0x3c/0x50 include/trace/events/kmem.h:94)
[<80462970>] (__traceiter_kfree) from [<804b0170>] (trace_kfree include/trace/events/kmem.h:94 [inline])
[<80462970>] (__traceiter_kfree) from [<804b0170>] (kfree+0x1f0/0x334 mm/slub.c:4377)
r7:8092da0c r6:00000000 r5:84900000 r4:844a74c0
[<804aff80>] (kfree) from [<8092da0c>] (detach_buf_split+0x13c/0x170 drivers/virtio/virtio_ring.c:810)
r10:8260c590 r9:844a74c0 r8:00000030 r7:00000060 r6:00000000 r5:00000006
r4:83aa3900
[<8092d8d0>] (detach_buf_split) from [<8092dacc>] (virtqueue_get_buf_ctx_split+0x8c/0x15c drivers/virtio/virtio_ring.c:865)
r9:00000000 r8:a0000193 r7:83aa3900 r6:83aa3840 r5:83cd50b8 r4:83aa3900
[<8092da40>] (virtqueue_get_buf_ctx_split) from [<8092e51c>] (virtqueue_get_buf_ctx drivers/virtio/virtio_ring.c:2421 [inline])
[<8092da40>] (virtqueue_get_buf_ctx_split) from [<8092e51c>] (virtqueue_get_buf+0x28/0x2c drivers/virtio/virtio_ring.c:2427)
r5:00000000 r4:83aa3900
[<8092e4f4>] (virtqueue_get_buf) from [<80a7c128>] (virtblk_done+0x78/0x104 drivers/block/virtio_blk.c:363)
[<80a7c0b0>] (virtblk_done) from [<8092e2b0>] (vring_interrupt drivers/virtio/virtio_ring.c:2595 [inline])
[<80a7c0b0>] (virtblk_done) from [<8092e2b0>] (vring_interrupt+0x88/0xfc drivers/virtio/virtio_ring.c:2570)
r9:20000193 r8:82e1322c r7:00000021 r6:82e13230 r5:00000000 r4:83aa3900
[<8092e228>] (vring_interrupt) from [<80933514>] (vm_interrupt+0x70/0xa8 drivers/virtio/virtio_mmio.c:320)
r5:00000000 r4:83ab33c0
[<809334a4>] (vm_interrupt) from [<802c13f4>] (__handle_irq_event_percpu+0x5c/0x278 kernel/irq/handle.c:158)
r9:00000021 r8:00000000 r7:df801f88 r6:84900000 r5:83aaab6c r4:83ab32c0
[<802c1398>] (__handle_irq_event_percpu) from [<802c1698>] (handle_irq_event_percpu kernel/irq/handle.c:193 [inline])
[<802c1398>] (__handle_irq_event_percpu) from [<802c1698>] (handle_irq_event+0x40/0x88 kernel/irq/handle.c:210)
r10:84900000 r9:84900000 r8:00000000 r7:df801f88 r6:83aaab6c r5:83aaab6c
r4:83aaab00
[<802c1658>] (handle_irq_event) from [<802c6564>] (handle_fasteoi_irq+0xbc/0x268 kernel/irq/chip.c:720)
r7:df801f88 r6:81b0f8f0 r5:83aaab6c r4:83aaab00
[<802c64a8>] (handle_fasteoi_irq) from [<802c0ad8>] (generic_handle_irq_desc include/linux/irqdesc.h:161 [inline])
[<802c64a8>] (handle_fasteoi_irq) from [<802c0ad8>] (handle_irq_desc kernel/irq/irqdesc.c:688 [inline])
[<802c64a8>] (handle_fasteoi_irq) from [<802c0ad8>] (generic_handle_domain_irq+0x30/0x40 kernel/irq/irqdesc.c:744)
r7:df80a00c r6:824b2340 r5:df80a000 r4:8260ce40
[<802c0aa8>] (generic_handle_domain_irq) from [<802011c4>] (gic_handle_irq+0x68/0x7c drivers/irqchip/irq-gic.c:370)
[<8020115c>] (gic_handle_irq) from [<81881464>] (generic_handle_arch_irq+0x60/0x80 kernel/irq/handle.c:238)
r7:eb395d20 r6:821421b8 r5:8217e2f8 r4:824b3ae4
[<81881404>] (generic_handle_arch_irq) from [<81833030>] (call_with_stack+0x1c/0x20 arch/arm/lib/call_with_stack.S:40)
r9:84900000 r8:00000090 r7:eb395d54 r6:ffffffff r5:60000013 r4:80559d78
[<81833014>] (call_with_stack) from [<80200b84>] (__irq_svc+0x84/0xac arch/arm/kernel/entry-armv.S:221)
Exception stack(0xeb395d20 to 0xeb395d68)
5d20: 81fc68d8 81a14d28 dfcc9000 00080002 dfcc9000 00000000 00000000 eb395da0
5d40: 00000090 849b62f0 84900000 eb395d84 eb395d58 eb395d70 80397eac 80559d78
5d60: 60000013 ffffffff
[<80397e74>] (bpf_prog_new_fd) from [<80398808>] (bpf_prog_load+0x954/0xca8 kernel/bpf/syscall.c:2925)
r5:00000000 r4:dfcc9000
[<80397eb4>] (bpf_prog_load) from [<80399920>] (__sys_bpf+0x2ec/0x1ef0 kernel/bpf/syscall.c:5631)
r10:00000000 r9:00000090 r8:200005c0 r7:00000005 r6:eb395e98 r5:00000090
r4:00000000
[<80399634>] (__sys_bpf) from [<8039baa4>] (__do_sys_bpf kernel/bpf/syscall.c:5738 [inline])
[<80399634>] (__sys_bpf) from [<8039baa4>] (sys_bpf+0x2c/0x48 kernel/bpf/syscall.c:5736)
r10:00000182 r9:84900000 r8:80200288 r7:00000182 r6:7ecdd160 r5:00000000
r4:ffffffff
[<8039ba78>] (sys_bpf) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66)
Exception stack(0xeb395fa8 to 0xeb395ff0)
5fa0: ffffffff 00000000 00000005 200005c0 00000090 00000000
5fc0: ffffffff 00000000 7ecdd160 00000182 20000600 20000500 0008a270 ffffffb7
5fe0: 7eb98c58 7eb98c48 000108a8 0002ec80
Rebooting in 86400 seconds..


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