Debian GNU/Linux 11 syzkaller ttyS0 Warning: Permanently added '[localhost]:34190' (ECDSA) to the list of known hosts. 2025/11/14 08:38:33 fuzzer started 2025/11/14 08:38:33 dialing manager at localhost:37161 syzkaller login: [ 49.978887] cgroup: Unknown subsys name 'net' [ 50.034415] cgroup: Unknown subsys name 'cpuset' [ 50.047914] cgroup: Unknown subsys name 'rlimit' 2025/11/14 08:38:43 syscalls: 2214 2025/11/14 08:38:43 code coverage: enabled 2025/11/14 08:38:43 comparison tracing: enabled 2025/11/14 08:38:43 extra coverage: enabled 2025/11/14 08:38:43 setuid sandbox: enabled 2025/11/14 08:38:43 namespace sandbox: enabled 2025/11/14 08:38:43 Android sandbox: enabled 2025/11/14 08:38:43 fault injection: enabled 2025/11/14 08:38:43 leak checking: enabled 2025/11/14 08:38:43 net packet injection: enabled 2025/11/14 08:38:43 net device setup: enabled 2025/11/14 08:38:43 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2025/11/14 08:38:43 devlink PCI setup: PCI device 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2025/11/14 08:39:13 starting 8 fuzzer processes 08:39:13 executing program 0: r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0) ioctl$TIOCGPKT(r0, 0x80045439, &(0x7f0000004040)) 08:39:13 executing program 1: mmap(&(0x7f0000000000/0x2000)=nil, 0x2000, 0x2000005, 0x32, 0xffffffffffffffff, 0x0) futex(&(0x7f0000000000), 0x80, 0x0, 0x0, 0x0, 0x0) 08:39:13 executing program 5: r0 = socket$nl_route(0x10, 0x3, 0x0) r1 = gettid() setresgid(0xee00, 0xee00, 0x0) r2 = socket$nl_xfrm(0x10, 0x3, 0x6) getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f00000085c0)={0x0, 0x0, 0x0}, &(0x7f0000008600)=0xc) setregid(r3, 0x0) sendmsg$netlink(r0, &(0x7f0000002b80)={0x0, 0x0, &(0x7f0000000540)=[{&(0x7f0000000100)={0x10}, 0x10}], 0x1, &(0x7f0000002bc0)=[@cred={{0x1c, 0x1, 0x2, {r1}}}], 0x20}, 0x0) 08:39:13 executing program 2: ioctl$sock_SIOCGIFINDEX(0xffffffffffffffff, 0x8933, &(0x7f0000000100)={'lo\x00'}) perf_event_open(&(0x7f0000000080)={0x2, 0x80, 0x7a, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext}, 0x0, 0x0, 0xffffffffffffffff, 0x0) perf_event_open(&(0x7f0000000180)={0x8, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_bp={&(0x7f0000000100)}}, 0x0, 0x0, 0xffffffffffffffff, 0x0) 08:39:13 executing program 3: syz_mount_image$iso9660(0x0, &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, 0x0) r0 = socket$nl_xfrm(0x10, 0x3, 0x6) getsockopt$sock_cred(r0, 0x1, 0x11, &(0x7f0000000000)={0x0, 0x0}, &(0x7f0000000040)=0x5) setuid(r1) lremovexattr(&(0x7f0000000240)='./file0\x00', &(0x7f0000000280)=@known='security.apparmor\x00') 08:39:13 executing program 7: seccomp$SECCOMP_SET_MODE_FILTER_LISTENER(0x1, 0x0, &(0x7f00000000c0)={0x1, &(0x7f0000000040)=[{0x6, 0x0, 0x0, 0x7fff0000}]}) syz_mount_image$tmpfs(0x0, &(0x7f00000001c0)='./file0\x00', 0x0, 0x0, 0x0, 0x0, 0x0) setxattr(&(0x7f00000000c0)='./file0\x00', &(0x7f0000000100)=@random={'security.', '#! '}, 0x0, 0x0, 0x0) removexattr(&(0x7f0000000180)='./file0\x00', &(0x7f0000000200)=@random={'security.', '#! '}) 08:39:13 executing program 4: r0 = memfd_create(&(0x7f0000000200)='\x00', 0x4) fallocate(r0, 0x10, 0x0, 0xb67f) 08:39:13 executing program 6: r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x40ce1, 0x0) splice(r0, 0x0, r0, 0x0, 0x4, 0x0) [ 89.651226] audit: type=1400 audit(1763109553.222:7): avc: denied { execmem } for pid=273 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 90.864459] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 90.866509] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 90.871052] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 90.873474] ================================================================== [ 90.874785] BUG: KASAN: slab-use-after-free in hci_cmd_work+0x66d/0x6d0 [ 90.876004] Read of size 2 at addr ffff88800dc288f8 by task kworker/u11:2/291 [ 90.878690] [ 90.882683] CPU: 1 UID: 0 PID: 291 Comm: kworker/u11:2 Not tainted 6.18.0-rc5-next-20251114 #1 PREEMPT(voluntary) [ 90.882717] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 90.882734] Workqueue: hci0 hci_cmd_work [ 90.882768] Call Trace: [ 90.882777] [ 90.882786] dump_stack_lvl+0xca/0x120 [ 90.882818] print_report+0xcb/0x610 [ 90.882850] ? __virt_addr_valid+0x100/0x5d0 [ 90.882878] ? hci_cmd_work+0x66d/0x6d0 [ 90.882909] ? hci_cmd_work+0x66d/0x6d0 [ 90.882941] kasan_report+0xca/0x100 [ 90.882972] ? hci_cmd_work+0x66d/0x6d0 [ 90.883007] hci_cmd_work+0x66d/0x6d0 [ 90.883040] process_one_work+0x8e1/0x19c0 [ 90.883081] ? __pfx_process_one_work+0x10/0x10 [ 90.883116] ? move_linked_works+0x172/0x270 [ 90.883144] ? assign_work+0x196/0x240 [ 90.883194] worker_thread+0x67e/0xe90 [ 90.883229] ? trace_irq_enable.constprop.0+0xc2/0x100 [ 90.883259] ? __pfx_worker_thread+0x10/0x10 [ 90.883295] kthread+0x3c8/0x740 [ 90.883326] ? __pfx_kthread+0x10/0x10 [ 90.883356] ? ret_from_fork+0x79/0x7a0 [ 90.883381] ? lock_release+0xc8/0x290 [ 90.883418] ? __pfx_kthread+0x10/0x10 [ 90.883450] ret_from_fork+0x67a/0x7a0 [ 90.883474] ? __pfx_ret_from_fork+0x10/0x10 [ 90.883500] ? __switch_to+0x759/0x1060 [ 90.883676] ? __pfx_kthread+0x10/0x10 [ 90.883709] ret_from_fork_asm+0x1a/0x30 [ 90.883750] [ 90.883758] [ 90.906458] Allocated by task 289: [ 90.907075] kasan_save_stack+0x24/0x50 [ 90.907782] kasan_save_track+0x14/0x30 [ 90.908476] __kasan_slab_alloc+0x59/0x70 [ 90.909211] kmem_cache_alloc_node_noprof+0x228/0x6b0 [ 90.910102] __alloc_skb+0x2ab/0x370 [ 90.910779] hci_cmd_sync_alloc+0x34/0x300 [ 90.911535] __hci_cmd_sync_sk+0xf7/0x5c0 [ 90.912280] hci_read_bd_addr_sync+0x2c/0x170 [ 90.913068] hci_dev_open_sync+0x145c/0x1f60 [ 90.913838] hci_power_on+0xdb/0x5d0 [ 90.914495] process_one_work+0x8e1/0x19c0 [ 90.915241] worker_thread+0x67e/0xe90 [ 90.915929] kthread+0x3c8/0x740 [ 90.916529] ret_from_fork+0x67a/0x7a0 [ 90.917216] ret_from_fork_asm+0x1a/0x30 [ 90.917933] [ 90.918239] Freed by task 292: [ 90.918800] kasan_save_stack+0x24/0x50 [ 90.919502] kasan_save_track+0x14/0x30 [ 90.920203] kasan_save_free_info+0x3a/0x60 [ 90.920975] __kasan_slab_free+0x43/0x70 [ 90.921690] kmem_cache_free+0x26f/0x500 [ 90.922416] kfree_skbmem+0x18a/0x1f0 [ 90.923089] sk_skb_reason_drop+0x10e/0x1b0 [ 90.923850] vhci_read+0x3d5/0x5d0 [ 90.924478] vfs_read+0x1eb/0xc70 [ 90.925092] ksys_read+0x121/0x240 [ 90.925719] do_syscall_64+0xbf/0x430 [ 90.926386] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 90.927293] [ 90.927595] The buggy address belongs to the object at ffff88800dc288c0 [ 90.927595] which belongs to the cache skbuff_head_cache of size 232 [ 90.929772] The buggy address is located 56 bytes inside of [ 90.929772] freed 232-byte region [ffff88800dc288c0, ffff88800dc289a8) [ 90.931828] [ 90.932135] The buggy address belongs to the physical page: [ 90.933091] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc28 [ 90.934425] anon flags: 0x100000000000000(node=0|zone=1) [ 90.935367] page_type: f5(slab) [ 90.935897] raw: 0100000000000000 ffff8880096c78c0 0000000000000000 0000000000000001 [ 90.936996] raw: 0000000000000000 00000000000c000c 00000000f5000000 0000000000000000 [ 90.938094] page dumped because: kasan: bad access detected [ 90.938898] [ 90.939162] Memory state around the buggy address: [ 90.939865] ffff88800dc28780: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 90.940884] ffff88800dc28800: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 90.941910] >ffff88800dc28880: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 90.942942] ^ [ 90.943969] ffff88800dc28900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 90.944995] ffff88800dc28980: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 90.946010] ================================================================== [ 90.947144] Disabling lock debugging due to kernel taint [ 90.957882] Bluetooth: hci1: unexpected cc 0x0c03 length: 249 > 1 [ 90.960050] Bluetooth: hci2: unexpected cc 0x0c03 length: 249 > 1 [ 90.961657] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 90.963089] Bluetooth: hci1: unexpected cc 0x1003 length: 249 > 9 [ 90.965170] Bluetooth: hci1: unexpected cc 0x1001 length: 249 > 9 [ 90.966505] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 90.972764] Bluetooth: hci1: unexpected cc 0x0c23 length: 249 > 4 [ 90.975860] Bluetooth: hci2: unexpected cc 0x1003 length: 249 > 9 [ 90.978834] Bluetooth: hci1: unexpected cc 0x0c38 length: 249 > 2 [ 90.991965] Bluetooth: hci2: unexpected cc 0x1001 length: 249 > 9 [ 90.994103] Bluetooth: hci3: unexpected cc 0x0c03 length: 249 > 1 [ 90.997224] Bluetooth: hci5: unexpected cc 0x0c03 length: 249 > 1 [ 90.998613] Bluetooth: hci5: unexpected cc 0x1003 length: 249 > 9 [ 90.999993] Bluetooth: hci2: unexpected cc 0x0c23 length: 249 > 4 [ 91.003592] Bluetooth: hci3: unexpected cc 0x1003 length: 249 > 9 [ 91.004525] Bluetooth: hci5: unexpected cc 0x1001 length: 249 > 9 [ 91.005831] Bluetooth: hci3: unexpected cc 0x1001 length: 249 > 9 [ 91.007271] Bluetooth: hci2: unexpected cc 0x0c38 length: 249 > 2 [ 91.007658] Bluetooth: hci4: unexpected cc 0x0c03 length: 249 > 1 [ 91.011729] Bluetooth: hci5: unexpected cc 0x0c23 length: 249 > 4 [ 91.013679] Bluetooth: hci6: unexpected cc 0x0c03 length: 249 > 1 [ 91.017922] Bluetooth: hci4: unexpected cc 0x1003 length: 249 > 9 [ 91.019052] Bluetooth: hci5: unexpected cc 0x0c38 length: 249 > 2 [ 91.020662] Bluetooth: hci4: unexpected cc 0x1001 length: 249 > 9 [ 91.021201] Bluetooth: hci3: unexpected cc 0x0c23 length: 249 > 4 [ 91.023018] Bluetooth: hci6: unexpected cc 0x1003 length: 249 > 9 [ 91.028256] Bluetooth: hci6: unexpected cc 0x1001 length: 249 > 9 [ 91.030334] Bluetooth: hci6: unexpected cc 0x0c23 length: 249 > 4 [ 91.035303] Bluetooth: hci3: unexpected cc 0x0c38 length: 249 > 2 [ 91.036452] Bluetooth: hci4: unexpected cc 0x0c23 length: 249 > 4 [ 91.045839] Bluetooth: hci4: unexpected cc 0x0c38 length: 249 > 2 [ 91.048310] Bluetooth: hci6: unexpected cc 0x0c38 length: 249 > 2 [ 91.054176] Bluetooth: hci7: unexpected cc 0x0c03 length: 249 > 1 [ 91.069286] Bluetooth: hci7: unexpected cc 0x1003 length: 249 > 9 [ 91.070931] Bluetooth: hci7: unexpected cc 0x1001 length: 249 > 9 [ 91.077841] Bluetooth: hci7: unexpected cc 0x0c23 length: 249 > 4 [ 91.081998] Bluetooth: hci7: unexpected cc 0x0c38 length: 249 > 2 [ 93.019525] Bluetooth: hci0: command tx timeout [ 93.019535] Bluetooth: hci1: command tx timeout [ 93.084651] Bluetooth: hci5: command tx timeout [ 93.084762] Bluetooth: hci6: command tx timeout [ 93.085089] Bluetooth: hci4: command tx timeout [ 93.085469] Bluetooth: hci3: command tx timeout [ 93.085853] Bluetooth: hci2: command tx timeout [ 93.148655] Bluetooth: hci7: command tx timeout [ 95.066748] Bluetooth: hci1: command tx timeout [ 95.067196] Bluetooth: hci0: command tx timeout [ 95.132753] Bluetooth: hci6: command tx timeout [ 95.133150] Bluetooth: hci2: command tx timeout [ 95.133518] Bluetooth: hci3: command tx timeout [ 95.134003] Bluetooth: hci4: command tx timeout [ 95.134374] Bluetooth: hci5: command tx timeout [ 95.194666] Bluetooth: hci7: command tx timeout [ 97.115024] Bluetooth: hci1: command tx timeout [ 97.115480] Bluetooth: hci0: command tx timeout [ 97.178727] Bluetooth: hci5: command tx timeout [ 97.179168] Bluetooth: hci4: command tx timeout [ 97.179547] Bluetooth: hci3: command tx timeout [ 97.180702] Bluetooth: hci2: command tx timeout [ 97.181087] Bluetooth: hci6: command tx timeout [ 97.242799] Bluetooth: hci7: command tx timeout [ 99.162739] Bluetooth: hci0: command tx timeout [ 99.162797] Bluetooth: hci1: command tx timeout [ 99.226723] Bluetooth: hci2: command tx timeout [ 99.226937] Bluetooth: hci6: command tx timeout [ 99.227193] Bluetooth: hci3: command tx timeout [ 99.227662] Bluetooth: hci4: command tx timeout [ 99.228362] Bluetooth: hci5: command tx timeout [ 99.290780] Bluetooth: hci7: command tx timeout VM DIAGNOSIS: 08:39:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880095578f8 RCX=0000000000000001 RDX=1ffff110012aae66 RSI=ffff8880095578d8 RDI=ffff888009557330 RBP=1ffff110012aaf25 RSP=ffff8880095572b8 R8 =0000000000000001 R9 =ffff888009557368 R10=000000000003ca6e R11=000000000003f888 R12=ffff888009557388 R13=ffff888009557370 R14=ffff8880095578d8 R15=ffff888009557328 RIP=ffffffff81360b7c RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcb65db8900 00000000 00000000 GS =0000 ffff8880e538f000 00000000 00000000 LDT=0000 fffffe6d00000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fa163ce0490 CR3=000000000ca60000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=033eb72e0dde7d837c497f2456d1ee00 XMM02=6b1e99b806172e3b00000000000aea28 XMM03=375afdebbf381c810000000000127688 XMM04=fbc2b0e2c15339f000000000001305a8 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=b3f42993368920b100000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016558000 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff8175bbd7 RDI=ffff8880165583fc RBP=c1326e7db6fdf400 RSP=ffff888016faf948 R8 =0000000000000000 R9 =0000000000000000 R10=c1326e7db6fdf000 R11=0000000000000001 R12=c1326e7db6fdf400 R13=0000000000000000 R14=ffff888016fafa00 R15=ffffffff859914c6 RIP=ffffffff815be50a RFL=00000013 [----A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff8880e548f000 00000000 00000000 LDT=0000 fffffe5300000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=0000559da42d3000 CR3=000000000e140000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=7465756c42205d3930353636382e3039 XMM04=636f72703d7373616c63742030733a74 XMM05=3a755f6d65747379733d747865746e6f XMM06=5f6d65747379733a755f6d6574737973 XMM07=00000000000000000000000000000000 XMM08=2030733a745f6c656e72656b3a725f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000