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INFO: rcu detected stall in sys_recvmmsg (3)

Status: upstream: reported on 2023/12/19 09:31
Subsystems: net
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+b079dc0aa6e992859e7c@syzkaller.appspotmail.com
First crash: 1245d, last: 2d21h
▶ ▼ ✨ AI Jobs (3)
ID Workflow Result Correct Bug Created Started Finished Revision Error
dec080eb-b7a9-4be3-959d-171d2beccd9d assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ INFO: rcu detected stall in sys_recvmmsg (3) 2026/05/30 05:15 2026/05/30 05:15 2026/05/30 06:03 6b4a844333e83556da95d61d7f207e7ef5cd4bc6
ab71bad9-7ec8-4206-a517-dc64b0b49980 assessment-security 💥 INFO: rcu detected stall in sys_recvmmsg (3) 2026/05/14 07:12 2026/05/14 07:12 2026/05/14 07:23 6ccb967e465e832a7bfd7a116ad00d52a0923a5d failed to run ["make" "KERNELVERSION=syzkaller" "KERNELRELEASE=syzkaller" "LOCALVERSION=-syzkaller" "-j" "32" "ARCH=x86_64" "CC=ccache clang" "LD=ld.lld" "O=/app/workdir/cache/build/222a90c65565bedf03b9f79ba6ed4230286d5394" "-s" "bzImage" "compile_commands.json"]: exit status 2 /app/workdir/cache/src/1e39944fbafaaa3768fe503059b27f6727d79506/lib/maple_tree.c:3514:20: warning: stack frame size (2424) exceeds limit (2048) in 'mas_wr_store_entry' [-Wframe-larger-than] 3514 | static inline void mas_wr_store_entry(struct ma_wr_state *wr_mas) | ^ 1 warning generated. /app/workdir/cache/src/1e39944fbafaaa3768fe503059b27f6727d79506/security/apparmor/apparmorfs.c:177:28: warning: unused function 'get_loaddata_common_ref' [-Wunused-function] 177 | static struct aa_loaddata *get_loaddata_common_ref(struct aa_common_ref *ref) | ^~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. /app/workdir/cache/src/1e39944fbafaaa3768fe503059b27f6727d79506/sound/usb/mixer_s1810c.c:634:5: warning: stack frame size (2360) exceeds limit (2048) in 'snd_sc1810_init_mixer' [-Wframe-larger-than] 634 | int snd_sc1810_init_mixer(struct usb_mixer_interface *mixer) | ^ 1 warning generated. /app/workdir/cache/src/1e39944fbafaaa3768fe503059b27f6727d79506/security/apparmor/policy_unpack.c:1727:5: warning: stack frame size (2872) exceeds limit (2048) in 'aa_unpack' [-Wframe-larger-than] 1727 | int aa_unpack(struct aa_loaddata *udata, struct list_head *lh, | ^ 1 warning generated. /app/workdir/cache/src/1e39944fbafaaa3768fe503059b27f6727d79506/lib/crypto/curve25519-hacl64.c:757:6: warning: stack frame size (2936) exceeds limit (2048) in 'curve25519_generic' [-Wframe-larger-than] 757 | void curve25519_generic(u8 mypublic[CURVE25519_KEY_SIZE], | ^ 1 warning generated. /app/workdir/cache/src/1e39944fbafaaa3768fe503059b27f6727d79506/net/ethtool/cmis_fw_update.c:432:1: warning: stack frame size (2392) exceeds limit (2048) in 'ethtool_cmis_fw_update' [-Wframe-larger-than] 432 | ethtool_cmis_fw_update(struct ethtool_cmis_fw_update_params *fw_update) | ^ 1 warning generated. /app/workdir/cache/src/1e39944fbafaaa3768fe503059b27f6727d79506/drivers/block/loop.c:1515:12: warning: stack frame size (2872) exceeds limit (2048) in 'lo_ioctl' [-Wframe-larger-than] 1515 | static int lo_ioctl(struct block_device *bdev, blk_mode_t mode, | ^ 1 warning generated. /app/workdir/cache/src/1e39944fbafaaa3768fe503059b27f6727d79506/crypto/ecc.c:1120:13: warning: stack frame size (2200) exceeds limit (2048) in 'ecc_point_double_jacobian' [-Wframe-larger-than] 1120 | static void ecc_point_double_jacobian(u64 *x1, u64 *y1, u64 *z1, | ^ /app/workdir/cache/src/1e39944fbafaaa3768fe503059b27f6727d79506/crypto/ecc.c:1265:13: warning: stack frame size (2296) exceeds limit (2048) in 'xycz_add_c' [-Wframe-larger-than] 1265 | static void xycz_add_c(u64 *x1, u64 *y1, u64 *x2, u64 *y2, | ^ 2 warnings generated. /app/workdir/cache/src/1e39944fbafaaa3768fe503059b27f6727d79506/fs/coredump.c:1162:6: warning: stack frame size (2232) exceeds limit (2048) in 'vfs_coredump' [-Wframe-larger-than] 1162 | void vfs_coredump(const kernel_siginfo_t *siginfo) | ^ 1 warning generated. /app/workdir/cache/src/1e39944fbafaaa3768fe503059b27f6727d79506/net/bluetooth/rfcomm/core.c:1936:31: warning: stack frame size (3352) exceeds limit (2048) in 'rfcomm_process_rx' [-Wframe-larger-than] 1936 | static struct rfcomm_session *rfcomm_process_rx(struct rfcomm_session *s) | ^ 1 warning generated. /app/workdir/cache/src/1e39944fbafaaa3768fe503059b27f6727d79506/drivers/target/target_core_xcopy.c:657:13: warning: stack frame size (2296) exceeds limit (2048) in 'target_xcopy_do_work' [-Wframe-larger-than] 657 | static void target_xcopy_do_work(struct work_struct *work) | ^ 1 warning generated. /app/workdir/cache/src/1e39944fbafaaa3768fe503059b27f6727d79506/drivers/media/i2c/cx25840/cx25840-core.c:2319:12: warning: sta
d40588c5-6f05-448a-9da5-d70155848661 repro ❓ INFO: rcu detected stall in sys_recvmmsg (3) 2026/03/06 05:25 2026/03/06 05:25 2026/03/06 05:34 31e9c887f7dc24e04b3ca70d0d54fc34141844b0
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[syzbot] Monthly batman report (Mar 2025) 0 (1) 2025/03/03 10:39
[syzbot] [batman?] INFO: rcu detected stall in sys_recvmmsg (3) 0 (1) 2023/12/19 09:31
▶ ▼ Similar bugs (10)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 INFO: rcu detected stall in sys_recvmmsg (3) 1 16 162d 557d 0/3 auto-obsoleted due to no activity on 2026/04/05 10:37
linux-4.19 INFO: rcu detected stall in sys_recvmmsg 1 C error 1 1261d 1261d 0/1 upstream: reported C repro on 2022/12/23 04:58
linux-5.15 INFO: rcu detected stall in sys_recvmmsg missing-backport origin:upstream 1 C done 76 9d00h 1157d 0/3 upstream: reported C repro on 2023/04/06 01:32
linux-6.1 INFO: rcu detected stall in sys_recvmmsg (4) 1 1 45d 45d 0/3 upstream: reported on 2026/04/22 14:30
linux-6.6 INFO: rcu detected stall in sys_recvmmsg 1 8 95d 323d 0/2 upstream: reported on 2025/07/18 08:32
linux-6.1 INFO: rcu detected stall in sys_recvmmsg (2) 1 5 661d 792d 0/3 auto-obsoleted due to no activity on 2024/11/22 11:58
upstream INFO: rcu detected stall in sys_recvmmsg mptcp 1 C done 52 1587d 1718d 20/29 fixed on 2022/03/08 16:11
linux-6.1 INFO: rcu detected stall in sys_recvmmsg 1 5 1038d 1169d 0/3 auto-obsoleted due to no activity on 2023/11/11 06:06
upstream INFO: rcu detected stall in sys_recvmmsg (2) net 1 4 1347d 1378d 0/29 auto-obsoleted due to no activity on 2023/01/03 09:53
android-5-15 BUG: soft lockup in sys_recvmmsg 1 5 681d 773d 0/2 auto-obsoleted due to no activity on 2024/10/23 09:30

Sample crash report:
IPVS: ovf: UDP 224.0.0.2:0 - no destination available
IPVS: ovf: UDP 224.0.0.2:0 - no destination available
IPVS: ovf: UDP 224.0.0.2:0 - no destination available
IPVS: ovf: UDP 224.0.0.2:0 - no destination available
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 ticks this GP) idle=b654/1/0x4000000000000000 softirq=131036/131036 fqs=23
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P21186/1:b..l P12312/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=147385, q=1002 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 21181 Comm: syz.7.3983 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__sanitizer_cov_trace_pc+0xb/0x70 kernel/kcov.c:213
Code: 62 00 be 03 00 00 00 5b e9 92 ab f0 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 8b 05 c5 1f 01 12 <48> 8b 34 24 65 48 8b 15 a1 1f 01 12 a9 00 01 ff 00 74 1b f6 c4 01
RSP: 0018:ffffc90000007e18 EFLAGS: 00000002
RAX: 0000000000010001 RBX: ffff888079c1b300 RCX: ffffffff8b854fec
RDX: 18b5a31800123970 RSI: 18b5a3180012b971 RDI: ffff88802f2eca80
RBP: 18b5a31800123970 R08: 0000000000000006 R09: 18b5a3180012b971
R10: 18b5a31800123970 R11: 0000000000000001 R12: ffff88804019e300
R13: dffffc0000000000 R14: 18b5a3180012b971 R15: ffff8880b8428658
FS:  00007f8ee38956c0(0000) GS:ffff888124383000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1899fea540 CR3: 0000000091bc1000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __rb_add include/linux/rbtree.h:234 [inline]
 rb_add_linked include/linux/rbtree.h:281 [inline]
 timerqueue_linked_add+0xd6/0x430 lib/timerqueue.c:96
 enqueue_hrtimer+0x1ad/0x2f0 kernel/time/hrtimer.c:1117
 __run_hrtimer kernel/time/hrtimer.c:1946 [inline]
 __hrtimer_run_queues+0x73d/0xa00 kernel/time/hrtimer.c:1994
 hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2113
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x460 arch/x86/kernel/apic/apic.c:1067
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_is_held_type+0xf5/0x140 kernel/locking/lockdep.c:5945
Code: ff ff ff ff 65 0f c1 15 f1 a5 80 08 83 fa 01 8b 44 24 04 75 2d 9c 5a 80 e6 02 75 47 41 f7 c5 00 02 00 00 74 01 fb 48 83 c4 08 <5b> 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc e9 d7 3a 03 00 31 c0
RSP: 0018:ffffc900078ffbf8 EFLAGS: 00000282
RAX: 0000000000000000 RBX: ffffffff8e7e5500 RCX: 0000000000000001
RDX: 0000000000000046 RSI: ffffffff8deea396 RDI: ffffffff8c1c4680
RBP: ffff88802f2eca80 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff
R13: 0000000000000246 R14: 00002000001321c0 R15: 0000000000010106
 lock_is_held include/linux/lockdep.h:249 [inline]
 __might_resched+0x248/0x330 kernel/sched/core.c:9125
 do_recvmmsg+0x525/0x760 net/socket.c:3089
 __sys_recvmmsg net/socket.c:3129 [inline]
 __do_sys_recvmmsg net/socket.c:3152 [inline]
 __se_sys_recvmmsg net/socket.c:3145 [inline]
 __x64_sys_recvmmsg+0x22a/0x280 net/socket.c:3145
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8ee299ce59
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:00007f8ee3895028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f8ee2c16090 RCX: 00007f8ee299ce59
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000006
RBP: 00007f8ee2a32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8ee2c16128 R14: 00007f8ee2c16090 R15: 00007ffdd1173a08
 </TASK>
task:syz-executor    state:R  running task     stack:23928 pid:12312 tgid:12312 ppid:12311  task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x205/0x970 kernel/entry/common.c:164
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data+0x0/0x90 kernel/kcov.c:246
Code: ee 26 01 12 48 8b 80 e0 16 00 00 c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <65> 8b 05 d9 26 01 12 49 89 f8 49 89 f1 49 89 d2 65 48 8b 3d b0 26
RSP: 0018:ffffc90003b17608 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90003b176f0 RCX: ffffffff8b877c34
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 00000000000011f5 R08: 0000000000000006 R09: 00000000000011f5
R10: fffffffffffffffe R11: 0000000000000000 R12: fffffffffffffffe
R13: ffffc90003b17702 R14: 0000000000000000 R15: 0000000000000035
 xas_find+0x134/0x8e0 lib/xarray.c:1409
 find_get_entry mm/filemap.c:2068 [inline]
 find_lock_entries+0x176/0x1190 mm/filemap.c:2172
 shmem_undo_range+0x212/0x1570 mm/shmem.c:1131
 shmem_truncate_range mm/shmem.c:1277 [inline]
 shmem_evict_inode+0x3f3/0xc40 mm/shmem.c:1407
 evict+0x3c2/0xad0 fs/inode.c:841
 iput_final fs/inode.c:1960 [inline]
 iput.part.0+0x605/0xf50 fs/inode.c:2009
 iput+0x35/0x40 fs/inode.c:1975
 filename_unlinkat+0x466/0x730 fs/namei.c:5572
 __do_sys_unlink fs/namei.c:5603 [inline]
 __se_sys_unlink fs/namei.c:5600 [inline]
 __x64_sys_unlink+0x46/0x70 fs/namei.c:5600
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5f51f9bf47
RSP: 002b:00007fff9607e268 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5f51f9bf47
RDX: 00007fff9607e290 RSI: 00007fff9607e320 RDI: 00007fff9607e320
RBP: 00007fff9607e320 R08: 00007fff9607f320 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007fff9607f3b0
R13: 00007f5f520321ca R14: 000000000015460f R15: 00007fff9607f3f0
 </TASK>
task:syz.7.3983      state:R  running task     stack:26896 pid:21186 tgid:21178 ppid:12310  task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 preempt_schedule_common+0x42/0xc0 kernel/sched/core.c:7370
 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
 vprintk_emit+0x438/0x6b0 kernel/printk/printk.c:2480
 _printk+0xcf/0x110 kernel/printk/printk.c:2504
 __nla_validate_parse.cold+0x95/0xa9 lib/nlattr.c:647
 __nla_parse+0x40/0x60 lib/nlattr.c:732
 nla_parse_deprecated include/net/netlink.h:736 [inline]
 nfnetlink_rcv_msg+0x4a9/0x11e0 net/netfilter/nfnetlink.c:273
 netlink_rcv_skb+0x159/0x420 net/netlink/af_netlink.c:2555
 nfnetlink_rcv+0x1b3/0x440 net/netfilter/nfnetlink.c:667
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x585/0x850 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8b0/0xda0 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0x9e1/0xb70 net/socket.c:2698
 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2752
 __sys_sendmsg+0x170/0x220 net/socket.c:2784
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8ee299ce59
RSP: 002b:00007f8ee3874028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f8ee2c16180 RCX: 00007f8ee299ce59
RDX: 0000000000048810 RSI: 0000200000000140 RDI: 000000000000000a
RBP: 00007f8ee2a32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8ee2c16218 R14: 00007f8ee2c16180 R15: 00007ffdd1173a08
 </TASK>
rcu: rcu_preempt kthread starved for 10385 jiffies! g147385 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27592 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1295/0x67a0 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 60929 PID: 21183 Comm: syz.2.3984 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: f6 7f 5c 00 48 89 df 5b e9 bd 10 62 00 be 03 00 00 00 5b e9 92 ab f0 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 8b 05 c5 1f 01 12 48 8b 34 24 65 48 8b 15 a1 1f 01
RSP: 0018:ffffc900078672f0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81fc2c4d
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888032718000
RBP: ffff8880b8443360 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003
R13: ffffed101708866d R14: 0000000000000001 R15: ffff8880b853c600
FS:  0000000000000000(0000) GS:ffff888124483000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f54cd24c7c4 CR3: 0000000038800000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 native_pause arch/x86/include/asm/vdso/processor.h:13 [inline]
 cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
 csd_lock_wait kernel/smp.c:342 [inline]
 smp_call_function_many_cond+0x587/0x1700 kernel/smp.c:892
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1057
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:46 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline]
 flush_tlb_mm_range+0x45f/0x16f0 arch/x86/mm/tlb.c:1451
 tlb_flush arch/x86/include/asm/tlb.h:23 [inline]
 tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:509 [inline]
 tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:499 [inline]
 zap_pte_range mm/memory.c:1961 [inline]
 zap_pmd_range mm/memory.c:2020 [inline]
 zap_pud_range mm/memory.c:2048 [inline]
 zap_p4d_range mm/memory.c:2069 [inline]
 __zap_vma_range+0x23c8/0x4a30 mm/memory.c:2109
 unmap_vmas+0x299/0x5f0 mm/memory.c:2178
 exit_mmap+0x1ef/0xa10 mm/mmap.c:1300
 __mmput+0x12a/0x410 kernel/fork.c:1178
 mmput+0x67/0x80 kernel/fork.c:1201
 exit_mm kernel/exit.c:582 [inline]
 do_exit+0x8b2/0x2af0 kernel/exit.c:964
 do_group_exit+0xd5/0x2a0 kernel/exit.c:1119
 get_signal+0x20ff/0x2210 kernel/signal.c:3037
 arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x98/0x670 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x666/0x870 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f24e2f9ce59
Code: Unable to access opcode bytes at 0x7f24e2f9ce2f.
RSP: 002b:00007f24e11f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 000000000019feb4 RBX: 00007f24e3215fa0 RCX: 00007f24e2f9ce59
RDX: 00000000fffffd9d RSI: 0000200000000200 RDI: 0000000000000003
RBP: 00007f24e3032d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f24e3216038 R14: 00007f24e3215fa0 R15: 00007ffd57d6ef28
 </TASK>
IPVS: ovf: UDP 224.0.0.2:0 - no destination available
IPVS: ovf: UDP 224.0.0.2:0 - no destination available
IPVS: ovf: UDP 224.0.0.2:0 - no destination available
IPVS: ovf: UDP 224.0.0.2:0 - no destination available
IPVS: ovf: UDP 224.0.0.2:0 - no destination available
IPVS: ovf: UDP 224.0.0.2:0 - no destination available
IPVS: ovf: UDP 224.0.0.2:0 - no destination available
IPVS: ovf: UDP 224.0.0.2:0 - no destination available

Crashes (263):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/06/03 17:28 upstream ba3e43a9e601 234057e5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/30 09:46 upstream 9215e74f228f 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/29 13:37 upstream 8fde5d1d47f6 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in sys_recvmmsg
2026/05/26 04:36 upstream e8c2f9fdadee c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in sys_recvmmsg
2026/05/26 00:27 upstream e7ae89a0c97c c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/23 23:12 upstream 79bd2dded182 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in sys_recvmmsg
2026/05/23 07:46 upstream cca95436be15 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/22 02:39 upstream 6779b50faa56 e195359d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in sys_recvmmsg
2026/05/20 12:47 upstream 27fa82620cba 62fb93a2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/18 23:12 upstream 4d3a2a466b8d 9f74d399 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/18 10:31 upstream 5200f5f493f7 55156e84 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/17 18:29 upstream 6916d5703ddf de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/16 13:50 upstream 6916d5703ddf a15a64a6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/14 11:01 upstream e1914add2799 6ccb967e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/14 08:43 upstream e1914add2799 6ccb967e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/12 01:09 upstream 50897c955902 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in sys_recvmmsg
2026/05/09 10:09 upstream 70390501d194 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/03 15:04 upstream 66edb901bf87 a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/03 05:44 upstream 66edb901bf87 a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/02 21:20 upstream f1a5e78a55eb a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/02 20:06 upstream f1a5e78a55eb a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/05/02 05:50 upstream ef5f46b63023 753c55b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/04/30 11:20 upstream e75a43c7cec4 005438fc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/04/24 09:38 upstream 45dcf5e28813 9cfb3ca7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/04/24 03:59 upstream 45dcf5e28813 9cfb3ca7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/04/21 20:47 upstream 4ee64205ffaa 0b6ab7ec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/04/17 06:35 upstream 3cd8b194bf34 de0a551d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/03/24 17:08 upstream c369299895a5 74e70d19 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in sys_recvmmsg
2026/03/18 00:45 upstream f0caa1d49cc0 c8810548 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in sys_recvmmsg
2026/03/17 03:07 upstream 2d1373e4246d 0737c18f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: rcu detected stall in sys_recvmmsg
2026/03/13 02:13 upstream 0257f64bdac7 2f7f359d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in sys_recvmmsg
2026/03/02 16:35 upstream 11439c4635ed b9dd6534 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/02/11 04:28 upstream dc855b77719f 441e25b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in sys_recvmmsg
2026/02/04 07:45 upstream de0674d9bc69 42b01fab .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in sys_recvmmsg
2026/02/03 06:15 upstream dee65f79364c d78927dd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in sys_recvmmsg
2026/01/31 12:59 upstream 283073725700 c75a2f6e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in sys_recvmmsg
2026/01/25 17:30 upstream d91a46d6805a 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in sys_recvmmsg
2026/01/17 08:27 upstream 39d3389331ab d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/01/17 07:06 upstream 39d3389331ab d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in sys_recvmmsg
2026/01/10 22:56 upstream b6151c4e60e5 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in sys_recvmmsg
2026/01/10 05:56 upstream 372800cb95a3 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2026/01/07 10:36 upstream f0b9d8eb98df d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: rcu detected stall in sys_recvmmsg
2026/01/06 04:31 upstream 7f98ab9da046 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2025/12/31 03:10 upstream dbf8fe85a16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2025/12/30 04:39 upstream 8640b74557fc d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2025/12/25 23:48 upstream ccd1cdca5cd4 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2025/12/21 05:39 upstream d8ba32c5a460 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: rcu detected stall in sys_recvmmsg
2025/12/21 02:47 upstream d8ba32c5a460 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2025/12/18 19:42 upstream ea1013c15392 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2025/12/15 03:54 upstream 8f0b4cce4481 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: rcu detected stall in sys_recvmmsg
2023/12/19 05:01 upstream 2cf4f94d8e86 3ad490ea .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2023/10/07 11:05 upstream 82714078aee4 5e837c76 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in sys_recvmmsg
2023/07/08 16:10 upstream 8689f4f2ea56 668cb1fa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root INFO: rcu detected stall in sys_recvmmsg
2024/09/15 05:12 net 36f6b72cb855 08d8a733 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: rcu detected stall in sys_recvmmsg
2024/11/28 08:07 net-next fcc79e1714e8 5df23865 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in sys_recvmmsg
2025/11/24 22:16 linux-next 422f3140bbcb bf6fe8fe .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: rcu detected stall in sys_recvmmsg
* Struck through repros no longer work on HEAD.