Hello, syzbot found the following issue on: HEAD commit: 9d1ddab261f3 Merge tag '6.9-rc5-smb-client-fixes' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=145d5280980000 kernel config: https://syzkaller.appspot.com/x/.config?x=545d4b3e07d6ccbc dashboard link: https://syzkaller.appspot.com/bug?extid=27f0d8597a213f37c0b6 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-9d1ddab2.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5d5ab6e818c4/vmlinux-9d1ddab2.xz kernel image: https://storage.googleapis.com/syzbot-assets/cf81babb0258/bzImage-9d1ddab2.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+27f0d8597a213f37c0b6@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KFENCE: invalid free in kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1159 Invalid free of 0xffff88816db60f00 (in kfence-#175): kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1159 __kfree_skb net/core/skbuff.c:1217 [inline] kfree_skb_reason+0x13a/0x210 net/core/skbuff.c:1252 kfree_skb include/linux/skbuff.h:1262 [inline] __hci_req_sync+0x61d/0x980 net/bluetooth/hci_request.c:184 hci_req_sync+0x97/0xd0 net/bluetooth/hci_request.c:206 hci_dev_cmd+0x653/0x9c0 net/bluetooth/hci_core.c:790 hci_sock_ioctl+0x4f3/0x8e0 net/bluetooth/hci_sock.c:1153 sock_do_ioctl+0x116/0x280 net/socket.c:1222 sock_ioctl+0x22e/0x6c0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f kfence-#175: 0xffff88816db60f00-0xffff88816db60fef, size=240, cache=skbuff_head_cache allocated by task 64 on cpu 2 at 217.660109s: skb_clone+0x190/0x3f0 net/core/skbuff.c:2063 hci_send_cmd_sync net/bluetooth/hci_core.c:4220 [inline] hci_cmd_work+0x66a/0x710 net/bluetooth/hci_core.c:4240 process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 freed by task 64 on cpu 2 at 217.660313s: kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1159 __kfree_skb net/core/skbuff.c:1217 [inline] kfree_skb_reason+0x13a/0x210 net/core/skbuff.c:1252 kfree_skb include/linux/skbuff.h:1262 [inline] hci_req_sync_complete+0x16c/0x270 net/bluetooth/hci_request.c:109 hci_event_packet+0x963/0x1170 net/bluetooth/hci_event.c:7604 hci_rx_work+0x2c4/0x1610 net/bluetooth/hci_core.c:4171 process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 CPU: 1 PID: 11620 Comm: syz-executor.2 Not tainted 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
