ci2 starts bisection 2026-09-19 18:19:00.323033505 +0000 UTC m=+127191.699708408
bisecting fixing commit since c7e15f0bdc49d6ea08787f5ac064a8cc940d86c7
building syzkaller on 72524a6625c995608a7d179201dff2195b8d1f66
ensuring issue is reproducible on original commit c7e15f0bdc49d6ea08787f5ac064a8cc940d86c7

testing commit c7e15f0bdc49d6ea08787f5ac064a8cc940d86c7 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 91698e00a1a3b76e431ec7de5de01a4364d22c0d492fea81af325c6d6c0069cb
run #0: crashed: BUG: soft lockup in sock_setsockopt
run #1: crashed: BUG: soft lockup in sock_setsockopt
run #2: crashed: BUG: soft lockup in sock_setsockopt
run #3: crashed: BUG: soft lockup in x64_sys_call
run #4: crashed: BUG: soft lockup in sock_setsockopt
run #5: crashed: BUG: soft lockup in sock_setsockopt
run #6: crashed: BUG: soft lockup in x64_sys_call
run #7: crashed: BUG: soft lockup in x64_sys_call
run #8: crashed: BUG: soft lockup in x64_sys_call
run #9: crashed: BUG: soft lockup in x64_sys_call
run #10: crashed: BUG: soft lockup in x64_sys_call
run #11: crashed: BUG: soft lockup in sock_setsockopt
run #12: crashed: BUG: soft lockup in sock_setsockopt
run #13: crashed: BUG: soft lockup in sock_setsockopt
run #14: crashed: BUG: soft lockup in sock_setsockopt
run #15: crashed: BUG: soft lockup in sock_setsockopt
run #16: crashed: BUG: soft lockup in x64_sys_call
run #17: crashed: BUG: soft lockup in sock_setsockopt
run #18: crashed: BUG: soft lockup in sock_setsockopt
run #19: crashed: BUG: soft lockup in x64_sys_call
representative crash: BUG: soft lockup in sock_setsockopt, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit c7e15f0bdc49d6ea08787f5ac064a8cc940d86c7 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 720c8616e6d67bd8080e836467f5ad7f7dcb69d2df77e4be6121c3f0baa8808e
run #0: crashed: BUG: soft lockup in x64_sys_call
run #1: crashed: BUG: soft lockup in sock_setsockopt
run #2: crashed: BUG: soft lockup in sock_setsockopt
run #3: crashed: BUG: soft lockup in x64_sys_call
run #4: crashed: BUG: soft lockup in x64_sys_call
run #5: crashed: BUG: soft lockup in sock_setsockopt
run #6: crashed: BUG: soft lockup in sock_setsockopt
run #7: crashed: BUG: soft lockup in sock_setsockopt
run #8: crashed: BUG: soft lockup in x64_sys_call
run #9: crashed: BUG: soft lockup in sock_setsockopt
representative crash: BUG: soft lockup in x64_sys_call, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [atomic_sleep memleak ubsan bug_or_warning kasan locking], they are not needed
kconfig minimization: base=5186 full=6558 leaves diff=267
split chunks (needed=false): <267>
split chunk #0 of len 267 into 5 parts
testing without sub-chunk 1/5
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
testing commit c7e15f0bdc49d6ea08787f5ac064a8cc940d86c7 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 28e31370e7bd3028896e4abfdb40a5c80c7b5735c6d255abfd1eb03d1695556d
run #0: crashed: BUG: soft lockup in sock_setsockopt
run #1: crashed: BUG: soft lockup in sock_close
run #2: crashed: BUG: soft lockup in sock_close
run #3: crashed: BUG: soft lockup in sock_setsockopt
run #4: crashed: BUG: soft lockup in x64_sys_call
run #5: crashed: BUG: soft lockup in sock_setsockopt
run #6: crashed: BUG: soft lockup in x64_sys_call
run #7: crashed: BUG: soft lockup in sock_setsockopt
run #8: crashed: BUG: soft lockup in sock_close
run #9: crashed: BUG: soft lockup in sock_setsockopt
representative crash: BUG: soft lockup in sock_setsockopt, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit c7e15f0bdc49d6ea08787f5ac064a8cc940d86c7 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 3b22a1c0ed2367e7dbcfc92807bbd5febc297010c4fdd25815f23b8d9ba1fdf2
run #0: crashed: BUG: soft lockup in x64_sys_call
run #1: crashed: BUG: soft lockup in sock_close
run #2: crashed: BUG: soft lockup in x64_sys_call
run #3: crashed: BUG: soft lockup in sock_setsockopt
run #4: crashed: BUG: soft lockup in sock_setsockopt
run #5: crashed: BUG: soft lockup in sock_close
run #6: crashed: BUG: soft lockup in sock_close
run #7: crashed: BUG: soft lockup in x64_sys_call
run #8: crashed: BUG: soft lockup in sock_setsockopt
run #9: crashed: BUG: soft lockup in sock_setsockopt
representative crash: BUG: soft lockup in x64_sys_call, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit c7e15f0bdc49d6ea08787f5ac064a8cc940d86c7 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 36571481902e35952c9713b6d34ec47150427d19dfc3a2f60add4d1affe2b17c
run #0: crashed: BUG: soft lockup in sock_close
run #1: crashed: BUG: soft lockup in x64_sys_call
run #2: crashed: BUG: soft lockup in sock_setsockopt
run #3: crashed: BUG: soft lockup in sock_setsockopt
run #4: crashed: BUG: soft lockup in sock_setsockopt
run #5: crashed: BUG: soft lockup in sock_setsockopt
run #6: crashed: BUG: soft lockup in sock_setsockopt
run #7: crashed: BUG: soft lockup in sock_setsockopt
run #8: crashed: BUG: soft lockup in sock_setsockopt
run #9: crashed: BUG: soft lockup in sock_setsockopt
representative crash: BUG: soft lockup in sock_close, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit c7e15f0bdc49d6ea08787f5ac064a8cc940d86c7 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 42c2c314d7b12d4c84d05a657bf75368fedcdde011ce37cd59065c75c9afa3f7
run #0: crashed: BUG: soft lockup in sock_setsockopt
run #1: crashed: BUG: soft lockup in x64_sys_call
run #2: crashed: BUG: soft lockup in sock_setsockopt
run #3: crashed: BUG: soft lockup in sock_setsockopt
run #4: crashed: BUG: soft lockup in x64_sys_call
run #5: crashed: BUG: soft lockup in sock_setsockopt
run #6: crashed: BUG: soft lockup in x64_sys_call
run #7: crashed: BUG: soft lockup in sock_setsockopt
run #8: crashed: BUG: soft lockup in sock_setsockopt
run #9: crashed: BUG: soft lockup in sock_setsockopt
representative crash: BUG: soft lockup in sock_setsockopt, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed
testing commit c7e15f0bdc49d6ea08787f5ac064a8cc940d86c7 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
failed building c7e15f0bdc49d6ea08787f5ac064a8cc940d86c7: ld.lld: error: undefined symbol: wext_proc_init
ld.lld: error: undefined symbol: wext_proc_exit
ld.lld: error: undefined symbol: wext_handle_ioctl
ld.lld: error: undefined symbol: compat_wext_handle_ioctl
minimized to 51 configs; suspects: [HAVE_CLK HID_ZEROPLUS USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_DM9601 USB_NET_GL620A USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_RNDIS_HOST USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD USB_OHCI_HCD_PCI USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_PRINTER USB_SERIAL_GENERIC USB_SERIAL_PL2303 USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_TRANCEVIBRATOR USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_WDM V4L2_ASYNC V4L2_FWNODE VIDEO_CAMERA_SENSOR WLAN WLAN_VENDOR_ATH WLAN_VENDOR_ATMEL WLAN_VENDOR_BROADCOM WLAN_VENDOR_INTERSIL WLAN_VENDOR_MARVELL WLAN_VENDOR_MEDIATEK WLAN_VENDOR_MICROCHIP WLAN_VENDOR_PURELIFI WLAN_VENDOR_RALINK WLAN_VENDOR_REALTEK WLAN_VENDOR_RSI WLAN_VENDOR_SILABS WLAN_VENDOR_ZYDAS ZEROPLUS_FF]
disabling configs for [kasan locking atomic_sleep memleak ubsan bug_or_warning], they are not needed
testing current HEAD 8cef8b5b11b787631242c233cd45d2f0e112fbfb
testing commit 8cef8b5b11b787631242c233cd45d2f0e112fbfb gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 072ab4f8e12c913cee221b310ccfc36c66f37b39691bafa337388be878f4813e
run #0: crashed: BUG: soft lockup in sock_close
run #1: crashed: BUG: soft lockup in sock_close
run #2: crashed: BUG: soft lockup in sock_setsockopt
run #3: crashed: BUG: soft lockup in sock_setsockopt
run #4: crashed: BUG: soft lockup in sock_setsockopt
run #5: crashed: BUG: soft lockup in sock_close
run #6: crashed: BUG: soft lockup in sock_setsockopt
run #7: crashed: BUG: soft lockup in sock_setsockopt
run #8: crashed: BUG: soft lockup in sock_setsockopt
run #9: crashed: BUG: soft lockup in x64_sys_call
representative crash: BUG: soft lockup in sock_close, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 2h45m36.283388399s (build: 48m13.37323693s, test: 1h38m49.647478381s)
crash still not fixed or there were kernel test errors
commit msg: ANDROID: fuse-bpf: Handle backing getattr errors
crash: BUG: soft lockup in sock_close
watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.2.267:1204]
Modules linked in:
CPU: 1 PID: 1204 Comm: syz.2.267 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:kvm_wait+0x75/0x80 arch/x86/kernel/kvm.c:1064
Code: 75 14 0f b6 07 40 38 f0 75 ce 66 90 0f 00 2d 30 c2 52 01 f4 eb c2 fa 0f b6 07 40 38 f0 75 0d 66 90 0f 00 2d 1b c2 52 01 fb f4 <eb> ac fb eb a9 e8 d1 0e fa 00 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90001dcbcc8 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff88810b38a918 RCX: 0000000000000000
RDX: 00000000000000b9 RSI: 0000000000000003 RDI: ffff88810b38a918
RBP: ffffc90001dcbcd8 R08: 0000000000000000 R09: ffff88810db94780
R10: 0000000000000000 R11: ffffffff82011810 R12: ffff88823fff0cc0
R13: 0000000000080001 R14: 0000000000000000 R15: ffff888237d2cac0
FS:  0000555594bed500(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f90ad3eb580 CR3: 000000011beec000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:603 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x27e/0x440 kernel/locking/qspinlock.c:511
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock include/linux/spinlock.h:187 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline]
 _raw_spin_lock_bh+0x36/0x40 kernel/locking/spinlock.c:178
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 lock_sock_nested+0x2e/0xe0 net/core/sock.c:3524
 lock_sock include/net/sock.h:1818 [inline]
 tipc_release+0x38/0x610 net/tipc/socket.c:639
 __sock_release net/socket.c:652 [inline]
 sock_close+0x4f/0xe0 net/socket.c:1390
 __fput+0x89/0x250 fs/file_table.c:320
 ____fput+0x9/0x10 fs/file_table.c:348
 task_work_run+0x90/0xb0 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x9b/0xb0 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f90ad39de99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc90b9f0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f90ad627da0 RCX: 00007f90ad39de99
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f90ad627da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f90ad627cb0 R11: 0000000000000246 R12: 000000000000b173
R13: 00007f90ad62609c R14: 000000000000ae65 R15: 00007ffc90b9f1f0
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1206 Comm: syz.2.267 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:rht_key_hashfn include/linux/rhashtable.h:159 [inline]
RIP: 0010:__rhashtable_lookup include/linux/rhashtable.h:596 [inline]
RIP: 0010:rhashtable_lookup include/linux/rhashtable.h:638 [inline]
RIP: 0010:tipc_sk_lookup+0x59/0x1e0 net/tipc/socket.c:3003
Code: ed 3b 22 ff 48 8b 83 20 0b 00 00 4e 8b 34 f0 e8 0d 3c 22 ff e8 d8 3b 22 ff 49 8b be c8 10 00 00 4c 8d 7d cc 4c 89 65 c0 8b 37 <8b> 47 08 89 c1 05 f3 be ad de 41 8d 94 0c f3 be ad de 89 c1 c1 c1
RSP: 0018:ffffc90001f937f8 EFLAGS: 00000202
RAX: ffff88810c442600 RBX: ffff88810fcac200 RCX: 0000000000000200
RDX: ffff88811ab980b0 RSI: 0000000000000100 RDI: ffff888113715000
RBP: ffffc90001f93848 R08: 0000000000000023 R09: 000000008010000e
R10: 0000000000000000 R11: 000000000002f450 R12: 0000000023aa848a
R13: 0000000023aa848a R14: ffff8881136fa000 R15: ffffc90001f93814
FS:  00007f90ae1b36c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f90ae1b2ff8 CR3: 000000011beec000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tipc_sk_rcv+0xcf/0xa00 net/tipc/socket.c:2494
 tipc_node_xmit+0x1b7/0x450 net/tipc/node.c:1703
 tipc_node_xmit_skb net/tipc/node.c:1768 [inline]
 tipc_node_distr_xmit+0xaf/0xe0 net/tipc/node.c:1783
 tipc_sk_rcv+0x55c/0xa00 net/tipc/socket.c:2503
 tipc_node_xmit+0x1b7/0x450 net/tipc/node.c:1703
 tipc_sk_push_backlog+0x113/0x130 net/tipc/socket.c:1316
 tipc_sk_conn_proto_rcv net/tipc/socket.c:1370 [inline]
 tipc_sk_proto_rcv+0x337/0x4b0 net/tipc/socket.c:2158
 tipc_sk_filter_rcv+0xa3f/0xad0 net/tipc/socket.c:2354
 tipc_sk_enqueue net/tipc/socket.c:2447 [inline]
 tipc_sk_rcv+0x288/0xa00 net/tipc/socket.c:2499
 tipc_node_xmit+0x1b7/0x450 net/tipc/node.c:1703
 tipc_node_xmit_skb net/tipc/node.c:1768 [inline]
 tipc_node_distr_xmit+0xaf/0xe0 net/tipc/node.c:1783
 tipc_sk_backlog_rcv+0x5c/0x80 net/tipc/socket.c:2414
 sk_backlog_rcv include/net/sock.h:1150 [inline]
 __release_sock+0x92/0x120 net/core/sock.c:2960
 release_sock net/core/sock.c:3536 [inline]
 sockopt_release_sock+0x3e/0xc0 net/core/sock.c:1067
 sk_setsockopt+0xdd6/0xe00 net/core/sock.c:1550
 sock_setsockopt+0xd/0x10 net/core/sock.c:1557
 __sys_setsockopt+0x138/0x1c0 net/socket.c:2274
 __do_sys_setsockopt net/socket.c:2289 [inline]
 __se_sys_setsockopt net/socket.c:2286 [inline]
 __x64_sys_setsockopt+0x1c/0x20 net/socket.c:2286
 x64_sys_call+0x124/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:55
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f90ad39de99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f90ae1b3028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f90ad626090 RCX: 00007f90ad39de99
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f90ad433eaf R08: 0000000000000004 R09: 0000000000000000
R10: 00002000000001c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f90ad626128 R14: 00007f90ad626090 R15: 00007ffc90b9ef88
 </TASK>