syzbot has found a reproducer for the following issue on: HEAD commit: c42d9eeef8e5 Merge tag 'hardening-v6.7-rc2' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13de8198e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=65a222833c8bc575 dashboard link: https://syzkaller.appspot.com/bug?extid=59f37b0ab4c558a5357c compiler: aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15bd8f98e80000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/384ffdcca292/non_bootable_disk-c42d9eee.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e62e8cdf4401/vmlinux-c42d9eee.xz kernel image: https://storage.googleapis.com/syzbot-assets/d4650ef9b454/Image-c42d9eee.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+59f37b0ab4c558a5357c@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 0 PID: 138 at mm/kfence/core.c:1147 __kfence_free+0x7c/0xb4 mm/kfence/core.c:1147 Modules linked in: CPU: 0 PID: 138 Comm: kworker/u4:6 Not tainted 6.7.0-rc1-syzkaller-00019-gc42d9eeef8e5 #0 Hardware name: linux,dummy-virt (DT) Workqueue: events_unbound bpf_map_free_deferred pstate: 81400009 (Nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) pc : __kfence_free+0x7c/0xb4 mm/kfence/core.c:1147 lr : kfence_free include/linux/kfence.h:187 [inline] lr : __slab_free+0x48c/0x508 mm/slub.c:3614 sp : ffff800082c3bbb0 x29: ffff800082c3bbb0 x28: faff000002c03e00 x27: 0000000000000000 x26: f4ff000002c18028 x25: ffff00007ff8f138 x24: ffff00007ff8f000 x23: 0000000000000001 x22: ffff00007ff8f000 x21: ffff00007ff8f000 x20: ffff80008024297c x19: fffffc0001ffe3c0 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 00000000200122aa x14: 0000000000000273 x13: 0000000000000000 x12: 0000000000000001 x11: 0000000000000001 x10: 40fbfcfeb3055ba3 x9 : 0000000000000000 x8 : ffff800082c3bc90 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff80008024297c x4 : ffff00007f868000 x3 : ffff8000824a02b8 x2 : f0ff000008cd7140 x1 : ffff00007f8a1350 x0 : ffff00007ff8f000 Call trace: __kfence_free+0x7c/0xb4 mm/kfence/core.c:1147 kfence_free include/linux/kfence.h:187 [inline] __slab_free+0x48c/0x508 mm/slub.c:3614 do_slab_free mm/slub.c:3757 [inline] slab_free mm/slub.c:3810 [inline] __kmem_cache_free+0x220/0x230 mm/slub.c:3822 kfree+0x5c/0x74 mm/slab_common.c:1056 kvfree+0x3c/0x4c mm/util.c:653 bpf_map_area_free+0x10/0x1c kernel/bpf/syscall.c:325 htab_map_free+0x134/0x298 kernel/bpf/hashtab.c:1556 bpf_map_free_deferred+0x44/0x60 kernel/bpf/syscall.c:701 process_one_work+0x148/0x258 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x2b4/0x3cc kernel/workqueue.c:2784 kthread+0x114/0x118 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857 ---[ end trace 0000000000000000 ]--- --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
