BUG: soft lockup in rtnl_newlink

Status: auto-obsoleted due to no activity on 2024/11/04 06:23
Reported-by: syzbot+c129e2b8460d480d5ddc@syzkaller.appspotmail.com
First crash: 842d, last: 732d
▶ ▼ Similar bugs (16)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in rtnl_newlink (5) prio:normal net 1 syz, C error 214 1d20h 481d 0/29 upstream: reported C repro on 2025/04/14 04:26
linux-6.1 INFO: rcu detected stall in rtnl_newlink (2) 1 3 786d 878d 0/3 auto-obsoleted due to no activity on 2024/09/20 22:26
upstream INFO: rcu detected stall in rtnl_newlink (4) sctp fs 1 syz, C error 9 815d 891d 25/29 fixed on 2024/05/22 23:36
upstream INFO: rcu detected stall in rtnl_newlink (3) batman 1 syz, C error done 3 1078d 1129d 0/29 auto-obsoleted due to no activity on 2023/12/03 18:15
linux-5.15 BUG: soft lockup in rtnl_newlink origin:lts-only 1 syz, C inconclusive 65 755d 1247d 0/3 auto-obsoleted due to no activity on 2024/10/21 17:39
android-6-1 BUG: soft lockup in rtnl_newlink 1 2 746d 757d 0/2 auto-obsoleted due to no activity on 2024/10/20 23:12
linux-4.14 BUG: soft lockup in rtnl_newlink 1 1 1655d 1655d 0/1 auto-closed as invalid on 2022/05/26 06:33
upstream INFO: rcu detected stall in rtnl_newlink batman 1 syz, C done inconclusive 201 1403d 2206d 0/29 auto-obsoleted due to no activity on 2023/02/01 16:38
linux-6.6 INFO: rcu detected stall in rtnl_newlink origin:upstream 1 syz, C error 4 48d 414d 0/2 upstream: reported C repro on 2025/06/20 10:45
linux-6.1 INFO: rcu detected stall in rtnl_newlink (4) 1 1 284d 284d 0/3 auto-obsoleted due to no activity on 2026/02/05 08:34
linux-6.1 INFO: rcu detected stall in rtnl_newlink 1 1 1033d 1033d 0/3 auto-obsoleted due to no activity on 2024/01/17 21:04
linux-5.15 INFO: rcu detected stall in rtnl_newlink origin:upstream 1 syz error 9 46d 643d 0/3 upstream: reported syz repro on 2024/11/02 18:01
linux-4.19 INFO: rcu detected stall in rtnl_newlink 1 syz, C error 7 1333d 2206d 0/1 upstream: reported C repro on 2020/07/24 01:06
linux-6.1 INFO: rcu detected stall in rtnl_newlink (3) 1 2 438d 450d 0/3 auto-obsoleted due to no activity on 2025/09/03 19:02
linux-6.1 INFO: rcu detected stall in rtnl_newlink (5) 1 syz, C 1 5d19h 5d19h 0/3 upstream: reported C repro on 2026/08/02 19:23
upstream INFO: rcu detected stall in rtnl_newlink (2) net 1 1 1272d 1272d 0/29 auto-obsoleted due to no activity on 2023/05/13 18:46

Sample crash report:
watchdog: BUG: soft lockup - CPU#0 stuck for 226s! [syz-executor:12208]
Modules linked in:
CPU: 0 PID: 12208 Comm: syz-executor Not tainted 5.15.152-syzkaller-00143-g70e1a731d986 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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+0x147/0x180 arch/x86/kernel/kvm.c:918
Code: 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 34 41 0f b6 45 00 44 38 f0 75 10 66 90 0f 00 2d 2b 02 13 04 fb f4 <e9> 24 ff ff ff fb e9 1e ff ff ff 44 89 e9 80 e1 07 38 c1 7c a3 4c
RSP: 0018:ffffc90000a760c0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff9200014ec1c RCX: 1ffffffff0d5aa9c
RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff8881f7038ad4
RBP: ffffc90000a76170 R08: dffffc0000000000 R09: ffffed103ee0715b
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881f7038ad4 R14: 0000000000000001 R15: 1ffff9200014ec20
FS:  000055555722d500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f14bab5ed58 CR3: 00000001101b6000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:597 [inline]
 pv_wait_node kernel/locking/qspinlock_paravirt.h:325 [inline]
 __pv_queued_spin_lock_slowpath+0x41b/0xc40 kernel/locking/qspinlock.c:473
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock include/linux/spinlock.h:187 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0x139/0x1b0 kernel/locking/spinlock.c:178
 sock_hash_delete_elem+0xb1/0x2f0 net/core/sock_map.c:937
 bpf_prog_2c29ac5cdc6b1842+0x3a/0xba4
 bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
 __bpf_prog_run include/linux/filter.h:625 [inline]
 bpf_prog_run include/linux/filter.h:632 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
 bpf_trace_run4+0x13f/0x270 kernel/trace/bpf_trace.c:1919
 __bpf_trace_mm_page_alloc+0xbf/0xf0 include/trace/events/kmem.h:201
 trace_mm_page_alloc include/trace/events/kmem.h:201 [inline]
 __alloc_pages+0x3cb/0x8f0 mm/page_alloc.c:5799
 allocate_slab mm/slub.c:1932 [inline]
 new_slab+0x9a/0x4e0 mm/slub.c:1995
 ___slab_alloc+0x39e/0x830 mm/slub.c:3028
 __slab_alloc+0x4a/0x90 mm/slub.c:3115
 slab_alloc_node mm/slub.c:3206 [inline]
 slab_alloc mm/slub.c:3248 [inline]
 kmem_cache_alloc+0x134/0x200 mm/slub.c:3253
 kmem_cache_zalloc include/linux/slab.h:723 [inline]
 __kernfs_new_node+0xdb/0x700 fs/kernfs/dir.c:593
 kernfs_new_node+0x130/0x230 fs/kernfs/dir.c:669
 __kernfs_create_file+0x4a/0x270 fs/kernfs/file.c:987
 sysfs_add_file_mode_ns+0x273/0x320 fs/sysfs/file.c:317
 sysfs_create_file_ns+0x196/0x2a0 fs/sysfs/file.c:343
 sysfs_create_file include/linux/sysfs.h:607 [inline]
 br_sysfs_addif+0xb8/0x190 net/bridge/br_sysfs_if.c:382
 br_add_if+0x3b9/0x1070 net/bridge/br_if.c:628
 br_add_slave+0x2c/0x40 net/bridge/br_device.c:382
 do_set_master net/core/rtnetlink.c:2543 [inline]
 do_setlink+0xe71/0x3ae0 net/core/rtnetlink.c:2748
 __rtnl_newlink net/core/rtnetlink.c:3429 [inline]
 rtnl_newlink+0x1779/0x2050 net/core/rtnetlink.c:3549
 rtnetlink_rcv_msg+0x951/0xc40 net/core/rtnetlink.c:5629
 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2505
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5647
 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline]
 netlink_unicast+0x8df/0xac0 net/netlink/af_netlink.c:1356
 netlink_sendmsg+0xa0a/0xd20 net/netlink/af_netlink.c:1924
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x564/0x720 net/socket.c:2058
 __do_sys_sendto net/socket.c:2070 [inline]
 __se_sys_sendto net/socket.c:2066 [inline]
 __x64_sys_sendto+0xe5/0x100 net/socket.c:2066
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f51b4b0e733
Code: 64 89 02 48 c7 c0 ff ff ff ff eb b7 66 2e 0f 1f 84 00 00 00 00 00 90 80 3d 11 de 15 00 00 41 89 ca 74 14 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 55 48 83 ec 30 44 89 4c 24
RSP: 002b:00007fff1ac38b58 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f51b57c9620 RCX: 00007f51b4b0e733
RDX: 0000000000000028 RSI: 00007f51b57c9670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007fff1ac38b74 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f51b57c9670 R15: 0000000000000000
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12203 Comm: syz.4.4529 Not tainted 5.15.152-syzkaller-00143-g70e1a731d986 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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+0x147/0x180 arch/x86/kernel/kvm.c:918
Code: 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 34 41 0f b6 45 00 44 38 f0 75 10 66 90 0f 00 2d 2b 02 13 04 fb f4 <e9> 24 ff ff ff fb e9 1e ff ff ff 44 89 e9 80 e1 07 38 c1 7c a3 4c
RSP: 0018:ffffc900009a61c0 EFLAGS: 00000246
RAX: 0000000000000003 RBX: 1ffff92000134c3c RCX: ffffffff8155068f
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff888105dad6d8
RBP: ffffc900009a6270 R08: dffffc0000000000 R09: ffffed1020bb5adc
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888105dad6d8 R14: 0000000000000003 R15: 1ffff92000134c40
FS:  00007f13b8ff26c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000011e5e4000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:597 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x6bc/0xc40 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock include/linux/spinlock.h:187 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0x139/0x1b0 kernel/locking/spinlock.c:178
 sock_hash_delete_elem+0xb1/0x2f0 net/core/sock_map.c:937
 bpf_prog_2c29ac5cdc6b1842+0x3a/0xba4
 bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
 __bpf_prog_run include/linux/filter.h:625 [inline]
 bpf_prog_run include/linux/filter.h:632 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
 bpf_trace_run4+0x13f/0x270 kernel/trace/bpf_trace.c:1919
 __bpf_trace_mm_page_alloc+0xbf/0xf0 include/trace/events/kmem.h:201
 trace_mm_page_alloc include/trace/events/kmem.h:201 [inline]
 __alloc_pages+0x3cb/0x8f0 mm/page_alloc.c:5799
 __alloc_pages_node include/linux/gfp.h:591 [inline]
 alloc_pages_node include/linux/gfp.h:605 [inline]
 alloc_pages include/linux/gfp.h:618 [inline]
 __stack_depot_save+0x38d/0x470 lib/stackdepot.c:326
 stack_depot_save+0xe/0x10 lib/stackdepot.c:383
 save_stack+0x104/0x1e0 mm/page_owner.c:140
 __set_page_owner+0x28/0x2e0 mm/page_owner.c:200
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2611
 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485
 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5777
 __alloc_pages_node include/linux/gfp.h:591 [inline]
 alloc_pages_node include/linux/gfp.h:605 [inline]
 alloc_pages include/linux/gfp.h:618 [inline]
 __stack_depot_save+0x38d/0x470 lib/stackdepot.c:326
 kasan_save_stack mm/kasan/common.c:39 [inline]
 kasan_set_track+0x5d/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
 kasan_slab_free include/linux/kasan.h:193 [inline]
 slab_free_hook mm/slub.c:1723 [inline]
 slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749
 slab_free mm/slub.c:3519 [inline]
 kfree+0xc8/0x220 mm/slub.c:4579
 sk_psock_free_link include/linux/skmsg.h:420 [inline]
 sock_map_del_link net/core/sock_map.c:160 [inline]
 sock_map_unref+0x352/0x4d0 net/core/sock_map.c:182
 sock_hash_delete_elem+0x274/0x2f0 net/core/sock_map.c:941
 bpf_prog_2c29ac5cdc6b1842+0x3a/0xba4
 bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
 __bpf_prog_run include/linux/filter.h:625 [inline]
 bpf_prog_run include/linux/filter.h:632 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1880 [inline]
 bpf_trace_run4+0x13f/0x270 kernel/trace/bpf_trace.c:1919
 __bpf_trace_mm_page_alloc+0xbf/0xf0 include/trace/events/kmem.h:201
 trace_mm_page_alloc include/trace/events/kmem.h:201 [inline]
 __alloc_pages+0x3cb/0x8f0 mm/page_alloc.c:5799
 __alloc_pages_node include/linux/gfp.h:591 [inline]
 alloc_pages_node include/linux/gfp.h:605 [inline]
 alloc_pages include/linux/gfp.h:618 [inline]
 shmem_alloc_page mm/shmem.c:1587 [inline]
 shmem_alloc_and_acct_page+0x4bd/0xa80 mm/shmem.c:1612
 shmem_getpage_gfp+0x1388/0x23c0 mm/shmem.c:1907
 shmem_getpage mm/shmem.c:152 [inline]
 shmem_write_begin+0xca/0x1b0 mm/shmem.c:2478
 generic_perform_write+0x2bc/0x5a0 mm/filemap.c:3849
 __generic_file_write_iter+0x25b/0x4b0 mm/filemap.c:3976
 generic_file_write_iter+0xaf/0x1c0 mm/filemap.c:4008
 call_write_iter include/linux/fs.h:2204 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0xd5d/0x1110 fs/read_write.c:594
 ksys_write+0x199/0x2c0 fs/read_write.c:647
 __do_sys_write fs/read_write.c:659 [inline]
 __se_sys_write fs/read_write.c:656 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:656
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f13ba3714df
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 c9 8c 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 1c 8d 02 00 48
RSP: 002b:00007f13b8ff1e00 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000013bd7ef RCX: 00007f13ba3714df
RDX: 00000000013bd7ef RSI: 00007f13b0bd2000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000054f0
R10: 00000000000003ca R11: 0000000000000293 R12: 0000000000000004
R13: 00007f13b8ff1f00 R14: 00007f13b8ff1ec0 R15: 00007f13b0bd2000
 </TASK>

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/08/06 06:15 android13-5.15-lts 70e1a731d986 e1bdb00a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in rtnl_newlink
2024/07/30 18:21 android13-5.15-lts d0a6506ecafd 6fde257d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in rtnl_newlink
2024/07/06 08:42 android13-5.15-lts 9044d25b8ff5 2a40360c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in rtnl_newlink
2024/05/17 03:05 android13-5.15-lts 5d96939590c0 c2e07261 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in rtnl_newlink
2024/05/04 23:08 android13-5.15-lts 5d96939590c0 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in rtnl_newlink
2024/04/18 17:53 android13-5.15-lts ad06eaf051cd af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in rtnl_newlink
2024/04/18 11:39 android13-5.15-lts ad06eaf051cd af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: soft lockup in rtnl_newlink
* Struck through repros no longer work on HEAD.