active_file 4096 unevictable 0 hierarchical_memory_limit 314572800 hierarchical_memsw_limit 9223372036854771712 total_cache 9162752 total_rss 198402048 total_shmem 9158656 total_mapped_file 491520 ================================================================== BUG: KCSAN: data-race in data_alloc / data_push_tail write to 0xffffffff86eccf00 of 8 bytes by task 12800 on cpu 1: data_alloc+0x216/0x2c0 kernel/printk/printk_ringbuffer.c:1074 prb_reserve+0x893/0xbc0 kernel/printk/printk_ringbuffer.c:1555 vprintk_store+0x53e/0x800 kernel/printk/printk.c:2228 vprintk_emit+0xd0/0x5d0 kernel/printk/printk.c:2284 vprintk_default+0x26/0x30 kernel/printk/printk.c:2318 vprintk+0x71/0x80 kernel/printk/printk_safe.c:45 _printk+0x7a/0xa0 kernel/printk/printk.c:2328 caif_disconnect_client+0x133/0x140 net/caif/cfcnfg.c:194 chnl_net_open+0x50b/0x5b0 net/caif/chnl_net.c:326 __dev_open+0x281/0x3a0 net/core/dev.c:1447 __dev_change_flags+0x159/0x400 net/core/dev.c:8605 dev_change_flags+0x59/0xd0 net/core/dev.c:8677 do_setlink+0x9f6/0x2430 net/core/rtnetlink.c:2916 rtnl_group_changelink net/core/rtnetlink.c:3458 [inline] __rtnl_newlink net/core/rtnetlink.c:3717 [inline] rtnl_newlink+0xbb3/0x1670 net/core/rtnetlink.c:3754 rtnetlink_rcv_msg+0x807/0x8c0 net/core/rtnetlink.c:6558 netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2545 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6576 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x589/0x650 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x66e/0x770 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x37c/0x4d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x1e9/0x270 net/socket.c:2667 __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x46/0x50 net/socket.c:2674 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffffffff86eccf00 of 8 bytes by task 12779 on cpu 0: data_make_reusable kernel/printk/printk_ringbuffer.c:590 [inline] data_push_tail+0x102/0x430 kernel/printk/printk_ringbuffer.c:675 data_alloc+0xbe/0x2c0 kernel/printk/printk_ringbuffer.c:1046 prb_reserve+0x893/0xbc0 kernel/printk/printk_ringbuffer.c:1555 vprintk_store+0x53e/0x800 kernel/printk/printk.c:2228 vprintk_emit+0xd0/0x5d0 kernel/printk/printk.c:2284 vprintk_default+0x26/0x30 kernel/printk/printk.c:2318 vprintk+0x71/0x80 kernel/printk/printk_safe.c:45 _printk+0x7a/0xa0 kernel/printk/printk.c:2328 seq_buf_do_printk+0xf2/0x180 lib/seq_buf.c:116 mem_cgroup_print_oom_meminfo+0x156/0x220 mm/memcontrol.c:1739 dump_header+0xa4/0x2d0 mm/oom_kill.c:462 oom_kill_process+0x33a/0x4c0 mm/oom_kill.c:1031 out_of_memory+0x9ca/0xbf0 mm/oom_kill.c:1169 mem_cgroup_out_of_memory+0x139/0x190 mm/memcontrol.c:1791 mem_cgroup_oom mm/memcontrol.c:2021 [inline] try_charge_memcg+0x75c/0xd30 mm/memcontrol.c:2790 try_charge mm/memcontrol.c:2884 [inline] charge_memcg mm/memcontrol.c:7210 [inline] __mem_cgroup_charge+0x63/0xf0 mm/memcontrol.c:7225 mem_cgroup_charge include/linux/memcontrol.h:684 [inline] shmem_alloc_and_add_folio mm/shmem.c:1662 [inline] shmem_get_folio_gfp+0x44e/0xb40 mm/shmem.c:2037 shmem_get_folio mm/shmem.c:2119 [inline] shmem_write_begin+0xa0/0x1b0 mm/shmem.c:2702 generic_perform_write+0x1c9/0x410 mm/filemap.c:3918 shmem_file_write_iter+0xc8/0xe0 mm/shmem.c:2878 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x48a/0x790 fs/read_write.c:584 ksys_write+0xeb/0x1a0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x42/0x50 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b value changed: 0x0000000100024583 -> 0x000000010002595a Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 12779 Comm: syz-executor.3 Not tainted 6.7.0-rc3-syzkaller-00014-gdf60cee26a2e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 ================================================================== total_dirty 0 total_writeback 0 total_workingset_refault_anon 0 total_workingset_refault_file 31 total_swap 119459840 total_swapcached 888832 total_pgpgin 766932 total_pgpgout 716040 total_pgfault 1249674 total_pgmajfault 1567 total_inactive_anon 176373760 total_active_anon 32075776 total_inactive_file 0 total_active_file 4096 total_unevictable 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz3,mems_allowed=0,oom_memcg=/syz3,task_memcg=/syz3,task=syz-executor.3,pid=12774,uid=0 Memory cgroup out of memory: Killed process 12774 (syz-executor.3) total-vm:181464kB, anon-rss:512kB, file-rss:8960kB, shmem-rss:0kB, UID:0 pgtables:88kB oom_score_adj:1000