=====================================================
BUG: KMSAN: uninit-value in raw_atomic_fetch_add_unless include/linux/atomic/atomic-arch-fallback.h:2429 [inline]
BUG: KMSAN: uninit-value in raw_atomic_add_unless include/linux/atomic/atomic-arch-fallback.h:2456 [inline]
BUG: KMSAN: uninit-value in raw_atomic_inc_not_zero include/linux/atomic/atomic-arch-fallback.h:2477 [inline]
BUG: KMSAN: uninit-value in atomic_inc_not_zero include/linux/atomic/atomic-instrumented.h:1537 [inline]
BUG: KMSAN: uninit-value in try_module_get+0x122/0x290 kernel/module/main.c:913
 raw_atomic_fetch_add_unless include/linux/atomic/atomic-arch-fallback.h:2429 [inline]
 raw_atomic_add_unless include/linux/atomic/atomic-arch-fallback.h:2456 [inline]
 raw_atomic_inc_not_zero include/linux/atomic/atomic-arch-fallback.h:2477 [inline]
 atomic_inc_not_zero include/linux/atomic/atomic-instrumented.h:1537 [inline]
 try_module_get+0x122/0x290 kernel/module/main.c:913
 dvb_device_open+0x17a/0x680 drivers/media/dvb-core/dvbdev.c:103
 chrdev_open+0x88d/0xb80 fs/char_dev.c:411
 do_dentry_open+0x827/0x1fd0 fs/open.c:949
 vfs_open+0x52/0x5f0 fs/open.c:1081
 do_open fs/namei.c:4671 [inline]
 path_openat+0x5733/0x64c0 fs/namei.c:4830
 do_file_open+0x2aa/0x680 fs/namei.c:4859
 do_sys_openat2+0x163/0x380 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0x240/0x300 fs/open.c:1383
 x64_sys_call+0x2445/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4522 [inline]
 slab_alloc_node mm/slub.c:4844 [inline]
 __do_kmalloc_node mm/slub.c:5237 [inline]
 __kmalloc_node_track_caller_noprof+0x4f6/0x1750 mm/slub.c:5346
 kmemdup_noprof+0x48/0x100 mm/util.c:138
 kmemdup_noprof include/linux/fortify-string.h:763 [inline]
 devinet_init_net+0x119/0xdd0 net/ipv4/devinet.c:2766
 ops_init+0x2b6/0x9f0 net/core/net_namespace.c:137
 setup_net+0x127/0x6a0 net/core/net_namespace.c:446
 copy_net_ns+0x7dd/0xfc0 net/core/net_namespace.c:581
 create_new_namespaces+0x70d/0xbf0 kernel/nsproxy.c:130
 unshare_nsproxy_namespaces+0x177/0x2d0 kernel/nsproxy.c:226
 ksys_unshare+0x9de/0x1330 kernel/fork.c:3174
 __do_sys_unshare kernel/fork.c:3245 [inline]
 __se_sys_unshare kernel/fork.c:3243 [inline]
 __x64_sys_unshare+0x47/0x70 kernel/fork.c:3243
 x64_sys_call+0x22b2/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:273
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 12420 Comm: syz.5.774 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
=====================================================