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possible deadlock in mptcp_subflow_create_socket (3)

Status: internal: reported on 2026/03/12 06:31
Subsystems: mptcp
Labels: prio:low
[Documentation on labels]
Fix commit: d532cddb6c60 nbd: Reclassify sockets to avoid lockdep circular dependency
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci-upstream-rust-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu-native-arm64-kvm ci-qemu2-riscv64 ci-upstream-gce-arm64]
First crash: 105d, last: 7d11h
✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
dcb359a6-403f-47df-b920-40fd6e4d9bf5 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ possible deadlock in mptcp_subflow_create_socket (3) 2026/05/24 13:11 2026/05/24 13:11 2026/05/24 14:14 c69befb30ac10e158cc9d1557b508ee3f0eca1de

			
		
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream possible deadlock in mptcp_subflow_create_socket mptcp 4 2 281d 282d 0/29 closed as invalid on 2025/09/29 07:27
upstream possible deadlock in mptcp_subflow_create_socket (2) mptcp 4 1 268d 264d 0/29 auto-obsoleted due to no activity on 2026/01/07 09:52

Sample crash report:
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.3.329/6729 is trying to acquire lock:
ffffffff8ea854e0 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:317 [inline]
ffffffff8ea854e0 (fs_reclaim){+.+.}-{0:0}, at: slab_pre_alloc_hook mm/slub.c:4520 [inline]
ffffffff8ea854e0 (fs_reclaim){+.+.}-{0:0}, at: slab_alloc_node mm/slub.c:4875 [inline]
ffffffff8ea854e0 (fs_reclaim){+.+.}-{0:0}, at: __kmalloc_cache_noprof+0x40/0x660 mm/slub.c:5410

but task is already holding lock:
ffff88804e679d60 (k-sk_lock-AF_INET6/1){+.+.}-{0:0}, at: mptcp_subflow_create_socket+0x142/0x800 net/mptcp/subflow.c:1794

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #7 (k-sk_lock-AF_INET6/1){+.+.}-{0:0}:
       lock_sock_nested+0x41/0x100 net/core/sock.c:3783
       mptcp_subflow_create_socket+0x142/0x800 net/mptcp/subflow.c:1794
       __mptcp_socket_create net/mptcp/protocol.c:110 [inline]
       __mptcp_nmpc_sk+0x155/0x790 net/mptcp/protocol.c:142
       mptcp_bind+0xab/0x1d0 net/mptcp/protocol.c:4082
       __sys_bind_socket net/socket.c:1933 [inline]
       __sys_bind+0x2e3/0x410 net/socket.c:1964
       __do_sys_bind net/socket.c:1969 [inline]
       __se_sys_bind net/socket.c:1967 [inline]
       __x64_sys_bind+0x7a/0x90 net/socket.c:1967
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #6 (sk_lock-AF_INET6){+.+.}-{0:0}:
       lock_sock_nested+0x41/0x100 net/core/sock.c:3783
       lock_sock include/net/sock.h:1713 [inline]
       inet_shutdown+0x6a/0x390 net/ipv4/af_inet.c:915
       nbd_mark_nsock_dead+0x2e9/0x560 drivers/block/nbd.c:318
       sock_shutdown+0x15e/0x260 drivers/block/nbd.c:411
       nbd_clear_sock+0x24/0x170 drivers/block/nbd.c:1427
       nbd_config_put+0x2dd/0x580 drivers/block/nbd.c:1451
       nbd_genl_connect+0x19d5/0x1cf0 drivers/block/nbd.c:2248
       genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
       genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
       genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
       netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
       genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
       netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
       netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
       netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
       sock_sendmsg_nosec net/socket.c:787 [inline]
       __sock_sendmsg net/socket.c:802 [inline]
       ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
       ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
       __sys_sendmsg net/socket.c:2784 [inline]
       __do_sys_sendmsg net/socket.c:2789 [inline]
       __se_sys_sendmsg net/socket.c:2787 [inline]
       __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #5 (&nsock->tx_lock){+.+.}-{4:4}:
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x1a3/0x1550 kernel/locking/mutex.c:820
       nbd_handle_cmd drivers/block/nbd.c:1143 [inline]
       nbd_queue_rq+0x37b/0x1100 drivers/block/nbd.c:1207
       blk_mq_dispatch_rq_list+0xa70/0x1910 block/blk-mq.c:2148
       __blk_mq_do_dispatch_sched block/blk-mq-sched.c:168 [inline]
       blk_mq_do_dispatch_sched block/blk-mq-sched.c:182 [inline]
       __blk_mq_sched_dispatch_requests+0xdcc/0x1600 block/blk-mq-sched.c:307
       blk_mq_sched_dispatch_requests+0xd7/0x190 block/blk-mq-sched.c:329
       blk_mq_run_hw_queue+0x348/0x4f0 block/blk-mq.c:2386
       blk_mq_dispatch_list+0xd16/0xe10 include/linux/spinlock.h:-1
       blk_mq_flush_plug_list+0x48d/0x570 block/blk-mq.c:2997
       __blk_flush_plug+0x3ed/0x4d0 block/blk-core.c:1230
       blk_finish_plug block/blk-core.c:1257 [inline]
       __submit_bio+0x28d/0x580 block/blk-core.c:649
       __submit_bio_noacct_mq block/blk-core.c:722 [inline]
       submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:753
       submit_bh fs/buffer.c:2742 [inline]
       block_read_full_folio+0x7b7/0x830 fs/buffer.c:2358
       filemap_read_folio+0x137/0x3b0 mm/filemap.c:2502
       do_read_cache_folio+0x358/0x590 mm/filemap.c:4107
       read_mapping_folio include/linux/pagemap.h:1017 [inline]
       read_part_sector+0xb6/0x2b0 block/partitions/core.c:724
       adfspart_check_ICS+0xb1/0x960 block/partitions/acorn.c:356
       check_partition block/partitions/core.c:143 [inline]
       blk_add_partitions block/partitions/core.c:591 [inline]
       bdev_disk_changed+0x817/0x1770 block/partitions/core.c:695
       blkdev_get_whole+0x380/0x510 block/bdev.c:756
       bdev_open+0x31e/0xd30 block/bdev.c:965
       blkdev_open+0x470/0x610 block/fops.c:697
       do_dentry_open+0x785/0x14e0 fs/open.c:947
       vfs_open+0x3b/0x340 fs/open.c:1079
       do_open fs/namei.c:4699 [inline]
       path_openat+0x2e08/0x3860 fs/namei.c:4858
       do_file_open+0x23e/0x4a0 fs/namei.c:4887
       do_sys_openat2+0x113/0x200 fs/open.c:1364
       do_sys_open fs/open.c:1370 [inline]
       __do_sys_openat fs/open.c:1386 [inline]
       __se_sys_openat fs/open.c:1381 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1381
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #4 (&cmd->lock){+.+.}-{4:4}:
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x1a3/0x1550 kernel/locking/mutex.c:820
       nbd_queue_rq+0xc6/0x1100 drivers/block/nbd.c:1199
       blk_mq_dispatch_rq_list+0xa70/0x1910 block/blk-mq.c:2148
       __blk_mq_do_dispatch_sched block/blk-mq-sched.c:168 [inline]
       blk_mq_do_dispatch_sched block/blk-mq-sched.c:182 [inline]
       __blk_mq_sched_dispatch_requests+0xdcc/0x1600 block/blk-mq-sched.c:307
       blk_mq_sched_dispatch_requests+0xd7/0x190 block/blk-mq-sched.c:329
       blk_mq_run_hw_queue+0x348/0x4f0 block/blk-mq.c:2386
       blk_mq_dispatch_list+0xd16/0xe10 include/linux/spinlock.h:-1
       blk_mq_flush_plug_list+0x48d/0x570 block/blk-mq.c:2997
       __blk_flush_plug+0x3ed/0x4d0 block/blk-core.c:1230
       blk_finish_plug block/blk-core.c:1257 [inline]
       __submit_bio+0x28d/0x580 block/blk-core.c:649
       __submit_bio_noacct_mq block/blk-core.c:722 [inline]
       submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:753
       submit_bh fs/buffer.c:2742 [inline]
       block_read_full_folio+0x7b7/0x830 fs/buffer.c:2358
       filemap_read_folio+0x137/0x3b0 mm/filemap.c:2502
       do_read_cache_folio+0x358/0x590 mm/filemap.c:4107
       read_mapping_folio include/linux/pagemap.h:1017 [inline]
       read_part_sector+0xb6/0x2b0 block/partitions/core.c:724
       adfspart_check_ICS+0xb1/0x960 block/partitions/acorn.c:356
       check_partition block/partitions/core.c:143 [inline]
       blk_add_partitions block/partitions/core.c:591 [inline]
       bdev_disk_changed+0x817/0x1770 block/partitions/core.c:695
       blkdev_get_whole+0x380/0x510 block/bdev.c:756
       bdev_open+0x31e/0xd30 block/bdev.c:965
       blkdev_open+0x470/0x610 block/fops.c:697
       do_dentry_open+0x785/0x14e0 fs/open.c:947
       vfs_open+0x3b/0x340 fs/open.c:1079
       do_open fs/namei.c:4699 [inline]
       path_openat+0x2e08/0x3860 fs/namei.c:4858
       do_file_open+0x23e/0x4a0 fs/namei.c:4887
       do_sys_openat2+0x113/0x200 fs/open.c:1364
       do_sys_open fs/open.c:1370 [inline]
       __do_sys_openat fs/open.c:1386 [inline]
       __se_sys_openat fs/open.c:1381 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1381
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (set->srcu){.+.+}-{0:0}:
       srcu_lock_sync include/linux/srcu.h:199 [inline]
       __synchronize_srcu+0xca/0x300 kernel/rcu/srcutree.c:1481
       elevator_switch+0x1e8/0x7a0 block/elevator.c:576
       elevator_change+0x2cc/0x450 block/elevator.c:681
       elevator_set_default+0x36c/0x430 block/elevator.c:754
       blk_register_queue+0x3e9/0x4e0 block/blk-sysfs.c:987
       __add_disk+0x677/0xd50 block/genhd.c:528
       add_disk_fwnode+0xfb/0x480 block/genhd.c:597
       add_disk include/linux/blkdev.h:794 [inline]
       nbd_dev_add+0x72c/0xb50 drivers/block/nbd.c:1984
       nbd_init+0x168/0x1f0 drivers/block/nbd.c:2692
       do_one_initcall+0x250/0x870 init/main.c:1392
       do_initcall_level+0x104/0x190 init/main.c:1454
       do_initcalls+0x59/0xa0 init/main.c:1470
       kernel_init_freeable+0x2a6/0x3e0 init/main.c:1703
       kernel_init+0x1d/0x1d0 init/main.c:1593
       ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

-> #2 (&q->elevator_lock){+.+.}-{4:4}:
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x1a3/0x1550 kernel/locking/mutex.c:820
       elevator_change+0x1b3/0x450 block/elevator.c:679
       elevator_set_none+0xb5/0x140 block/elevator.c:769
       blk_mq_elv_switch_none block/blk-mq.c:5131 [inline]
       __blk_mq_update_nr_hw_queues block/blk-mq.c:5176 [inline]
       blk_mq_update_nr_hw_queues+0x5e7/0x1a60 block/blk-mq.c:5241
       nbd_start_device+0x17f/0xb10 drivers/block/nbd.c:1489
       nbd_genl_connect+0x165b/0x1cf0 drivers/block/nbd.c:2239
       genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
       genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
       genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
       netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
       genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
       netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
       netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
       netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
       sock_sendmsg_nosec net/socket.c:787 [inline]
       __sock_sendmsg net/socket.c:802 [inline]
       ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
       ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
       __sys_sendmsg net/socket.c:2784 [inline]
       __do_sys_sendmsg net/socket.c:2789 [inline]
       __se_sys_sendmsg net/socket.c:2787 [inline]
       __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&q->q_usage_counter(io)#49){++++}-{0:0}:
       blk_alloc_queue+0x546/0x680 block/blk-core.c:461
       blk_mq_alloc_queue block/blk-mq.c:4450 [inline]
       __blk_mq_alloc_disk+0x197/0x390 block/blk-mq.c:4497
       nbd_dev_add+0x499/0xb50 drivers/block/nbd.c:1954
       nbd_init+0x168/0x1f0 drivers/block/nbd.c:2692
       do_one_initcall+0x250/0x870 init/main.c:1392
       do_initcall_level+0x104/0x190 init/main.c:1454
       do_initcalls+0x59/0xa0 init/main.c:1470
       kernel_init_freeable+0x2a6/0x3e0 init/main.c:1703
       kernel_init+0x1d/0x1d0 init/main.c:1593
       ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

-> #0 (fs_reclaim){+.+.}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3165 [inline]
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain kernel/locking/lockdep.c:3908 [inline]
       __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237
       lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
       __fs_reclaim_acquire mm/page_alloc.c:4325 [inline]
       fs_reclaim_acquire+0x71/0x100 mm/page_alloc.c:4339
       might_alloc include/linux/sched/mm.h:317 [inline]
       slab_pre_alloc_hook mm/slub.c:4520 [inline]
       slab_alloc_node mm/slub.c:4875 [inline]
       __kmalloc_cache_noprof+0x40/0x660 mm/slub.c:5410
       kmalloc_noprof include/linux/slab.h:950 [inline]
       kzalloc_noprof include/linux/slab.h:1188 [inline]
       ref_tracker_alloc+0x15a/0x4c0 lib/ref_tracker.c:270
       __netns_tracker_alloc include/net/net_namespace.h:367 [inline]
       netns_tracker_alloc include/net/net_namespace.h:376 [inline]
       get_net_track+0x16e/0x230 include/net/net_namespace.h:393
       sk_net_refcnt_upgrade+0xb2/0x130 net/core/sock.c:2397
       mptcp_subflow_create_socket+0x32b/0x800 net/mptcp/subflow.c:1807
       __mptcp_socket_create net/mptcp/protocol.c:110 [inline]
       __mptcp_nmpc_sk+0x155/0x790 net/mptcp/protocol.c:142
       mptcp_bind+0xab/0x1d0 net/mptcp/protocol.c:4082
       __sys_bind_socket net/socket.c:1933 [inline]
       __sys_bind+0x2e3/0x410 net/socket.c:1964
       __do_sys_bind net/socket.c:1969 [inline]
       __se_sys_bind net/socket.c:1967 [inline]
       __x64_sys_bind+0x7a/0x90 net/socket.c:1967
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  fs_reclaim --> sk_lock-AF_INET6 --> k-sk_lock-AF_INET6/1

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(k-sk_lock-AF_INET6/1);
                               lock(sk_lock-AF_INET6);
                               lock(k-sk_lock-AF_INET6/1);
  lock(fs_reclaim);

 *** DEADLOCK ***

2 locks held by syz.3.329/6729:
 #0: ffff88804c39a8a0 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline]
 #0: ffff88804c39a8a0 (sk_lock-AF_INET6){+.+.}-{0:0}, at: mptcp_bind+0xa3/0x1d0 net/mptcp/protocol.c:4081
 #1: ffff88804e679d60 (k-sk_lock-AF_INET6/1){+.+.}-{0:0}, at: mptcp_subflow_create_socket+0x142/0x800 net/mptcp/subflow.c:1794

stack backtrace:
CPU: 0 UID: 0 PID: 6729 Comm: syz.3.329 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043
 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2175
 check_prev_add kernel/locking/lockdep.c:3165 [inline]
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237
 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
 __fs_reclaim_acquire mm/page_alloc.c:4325 [inline]
 fs_reclaim_acquire+0x71/0x100 mm/page_alloc.c:4339
 might_alloc include/linux/sched/mm.h:317 [inline]
 slab_pre_alloc_hook mm/slub.c:4520 [inline]
 slab_alloc_node mm/slub.c:4875 [inline]
 __kmalloc_cache_noprof+0x40/0x660 mm/slub.c:5410
 kmalloc_noprof include/linux/slab.h:950 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 ref_tracker_alloc+0x15a/0x4c0 lib/ref_tracker.c:270
 __netns_tracker_alloc include/net/net_namespace.h:367 [inline]
 netns_tracker_alloc include/net/net_namespace.h:376 [inline]
 get_net_track+0x16e/0x230 include/net/net_namespace.h:393
 sk_net_refcnt_upgrade+0xb2/0x130 net/core/sock.c:2397
 mptcp_subflow_create_socket+0x32b/0x800 net/mptcp/subflow.c:1807
 __mptcp_socket_create net/mptcp/protocol.c:110 [inline]
 __mptcp_nmpc_sk+0x155/0x790 net/mptcp/protocol.c:142
 mptcp_bind+0xab/0x1d0 net/mptcp/protocol.c:4082
 __sys_bind_socket net/socket.c:1933 [inline]
 __sys_bind+0x2e3/0x410 net/socket.c:1964
 __do_sys_bind net/socket.c:1969 [inline]
 __se_sys_bind net/socket.c:1967 [inline]
 __x64_sys_bind+0x7a/0x90 net/socket.c:1967
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9bae39cdd9
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:00007f9baf21d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 00007f9bae615fa0 RCX: 00007f9bae39cdd9
RDX: 000000000000001c RSI: 0000200000000000 RDI: 0000000000000003
RBP: 00007f9bae432d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9bae616038 R14: 00007f9bae615fa0 R15: 00007ffc3cedc0c8
 </TASK>

Crashes (121):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/04/30 14:58 upstream e75a43c7cec4 a7464baf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in mptcp_subflow_create_socket
2026/04/28 21:15 upstream dca922e019dd b4209743 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root possible deadlock in mptcp_subflow_create_socket
2026/05/01 15:47 upstream 26fd6bff2c05 753c55b9 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream possible deadlock in mptcp_subflow_create_socket
2026/06/10 19:20 upstream acb7500801e9 f79bac11 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 possible deadlock in mptcp_subflow_create_socket
2026/05/15 16:56 upstream 70eda68668d1 9cd3beaa .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 possible deadlock in mptcp_subflow_create_socket
2026/06/17 21:15 net 406e8a651a7b 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/06/06 09:22 net c93952cc0034 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/06/05 20:59 net 4aacf509e537 48b6c3fa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/06/04 17:42 net c05fa14db43e 197909be .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/06/01 19:51 net f3be0c984ecb 8d8eeb3a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/26 23:42 net c66d7c3c1f17 2b01f00e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/24 02:56 net 87a1e0fe7776 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/17 06:39 net aaec7096f996 de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/15 04:39 net 5db89c99566f 6ccb967e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/11 08:14 net a450063ef86b e6eb7c0b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/11 05:19 net 46e9b0224475 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/09 17:18 net 496c0c4c53bb 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/08 14:38 net fcee7d82f27d 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/07 20:56 net 41ae14071cd7 e358bca5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/07 03:25 net b89e0100a5f6 cbcd9ea0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/04 08:35 net bd3a4795d574 a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/06/17 19:08 net-next d954a67a7dfa 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/06/17 17:47 net-next d954a67a7dfa 62cc6db3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/06/14 03:54 net-next 30b81fc779c9 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/06/13 15:08 net-next 5184fd34214f 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/06/12 18:34 net-next f6033078a9e6 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/06/12 08:25 net-next 9bbdc7dc4090 e93da63e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/06/11 17:28 net-next 0ce346bf2f68 d93a6ab6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/06/04 11:16 net-next a87533a80831 197909be .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/06/02 18:20 net-next 51e4eca2d360 62fe1528 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/28 08:52 net-next 56ed77ff6022 4c36e7e5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/24 04:11 net-next c0aa5f13826d c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/23 16:58 net-next c0aa5f13826d c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/22 13:37 net-next 1a1f055318d8 e16cf9f3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/22 05:54 net-next 1a1f055318d8 e195359d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/18 17:25 net-next 627ac78f2741 55156e84 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/18 08:56 net-next 627ac78f2741 de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/17 17:40 net-next 627ac78f2741 de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/17 08:27 net-next 627ac78f2741 de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/15 15:39 net-next 822d4a8e390a 9cd3beaa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/13 19:29 net-next 8ebd24a7822c fec2a7ee .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/13 05:30 net-next 543bdc1578cd a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/13 00:44 net-next 73d587ae684d a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/11 04:06 net-next a93245816556 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/10 14:06 net-next 8b2feced65cd 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/10 13:06 net-next 8b2feced65cd 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/10 10:51 net-next 8b2feced65cd 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/05/09 23:09 net-next 8b2feced65cd 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce possible deadlock in mptcp_subflow_create_socket
2026/03/30 04:54 linux-next 3b058d1aeeef 356bdfc9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce possible deadlock in mptcp_subflow_create_socket
* Struck through repros no longer work on HEAD.