Hi, Syzkaller found the following issue: HEAD commit: 75acfdb Linux 5.16-rc8 git tree: upstream console output: https://pastebin.com/raw/AzAMX5zz kernel config: https://pastebin.com/raw/XsnKfdRt And hope the report log can help you. [ 1251.721354][ T59] INFO: task syz-executor.0:2134 blocked for more than 143 seconds. [ 1251.722724][ T59] Not tainted 5.16.0-rc8+ #10 [ 1251.723664][ T59] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1251.725148][ T59] task:syz-executor.0 state:D stack:27536 pid: 2134 ppid: 13069 flags:0x00000004 [ 1251.726742][ T59] Call Trace: [ 1251.727272][ T59] <TASK> [ 1251.727788][ T59] __schedule+0xcd9/0x2550 [ 1251.728512][ T59] ? io_schedule_timeout+0x150/0x150 [ 1251.731002][ T59] schedule+0xd2/0x260 [ 1251.731762][ T59] schedule_preempt_disabled+0xf/0x20 [ 1251.732627][ T59] __mutex_lock+0xc48/0x1610 [ 1251.733367][ T59] ? nl802154_pre_doit+0x645/0xd30 [ 1251.734194][ T59] ? mutex_lock_io_nested+0x1410/0x1410 [ 1251.735387][ T59] ? __nla_validate_parse+0x2df/0x2400 [ 1251.736727][ T59] ? nla_get_range_signed+0x520/0x520 [ 1251.737977][ T59] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 1254.756569][ T3364] lowmem_reserve[]: 0 0 852 852 852 [ 1254.757520][ T3364] Node 1 Normal free:36116kB boost:0kB min:24292kB low:30364kB high:36436kB reserved_highatomic:12288KB active_anon:15552kB inactive_anon:191888kB active_file:0kB inactive_file:56kB unevictable:1536kB writepending:0kB present:1048576kB managed:872480kB mlocked:0kB bounce:0kB free_pcp:4952kB local_pcp:776kB free_cma:0kB [ 1254.852260][ T2256] Node 0 DMA free:6572kB boost:2048kB min:2472kB low:2576kB high:2680kB reserved_highatomic:0KB active_anon:12kB inactive_anon:4636kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:8kB local_pcp:8kB free_cma:0kB [ 1254.856691][ T2256] lowmem_reserve[]: 0 1333 1333 1333 1333 [ 1254.857666][ T2256] Node 0 DMA32 free:98544kB boost:85540kB min:123560kB low:133064kB high:142568kB reserved_highatomic:16384KB active_anon:10888kB inactive_anon:467648kB active_file:4kB inactive_file:1424kB unevictable:1536kB writepending:0kB present:2080768kB managed:1372868kB mlocked:0kB bounce:0kB free_pcp:4416kB local_pcp:316kB free_cma:0kB [ 1255.151925][ T59] ? nl802154_pre_doit+0x645/0xd30 [ 1255.152819][ T59] ? rtnl_lock+0x5/0x20 [ 1255.153500][ T59] nl802154_pre_doit+0x645/0xd30 [ 1255.154329][ T59] ? __nla_parse+0x3d/0x50 [ 1255.155330][ T59] ? nl802154_dump_llsec_dev+0xba0/0xba0 [ 1255.156224][ T59] ? write_comp_data+0x1c/0x70 [ 1255.157031][ T59] ? __sanitizer_cov_trace_pc+0x1a/0x40 [ 1255.158010][ T59] ? genl_family_rcv_msg_attrs_parse.isra.0+0x1ae/0x280 [ 1255.159174][ T59] ? nl802154_dump_llsec_dev+0xba0/0xba0 [ 1258.792471][ T1340] ieee802154 phy1 wpan1: encryption failed: -22 [ 1258.882579][ T3364] lowmem_reserve[]: 0 0 0 0 0 [ 1260.285180][ T59] genl_family_rcv_msg_doit.isra.0+0x1e4/0x330 [ 1260.286249][ T59] ? genl_start+0x670/0x670 [ 1260.287076][ T59] ? __sanitizer_cov_trace_pc+0x1a/0x40 [ 1260.287968][ T59] ? __radix_tree_lookup+0x21b/0x2b0 [ 1260.288832][ T59] ? __sanitizer_cov_trace_pc+0x1a/0x40 [ 1260.997983][ T2256] lowmem_reserve[]: 0 0 0 0 0 [ 1260.998899][ T2256] Node 1 DMA32 free:21864kB boost:0kB min:27368kB low:34208kB high:41048kB reserved_highatomic:0KB active_anon:0kB inactive_anon:66040kB active_file:80kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048444kB managed:982908kB mlocked:0kB bounce:0kB free_pcp:4064kB local_pcp:1984kB free_cma:0kB
