=====================================================
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_compat_sys_openat fs/open.c:1434 [inline]
 __se_compat_sys_openat fs/open.c:1432 [inline]
 __ia32_compat_sys_openat+0x238/0x300 fs/open.c:1432
 ia32_sys_call+0x330b/0x4360 arch/x86/include/generated/asm/syscalls_32.h:296
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 do_int80_emulation+0x15a/0x330 arch/x86/entry/syscall_32.c:172
 asm_int80_emulation+0x1f/0x30 arch/x86/include/asm/idtentry.h:621

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4508 [inline]
 slab_alloc_node mm/slub.c:4830 [inline]
 __do_kmalloc_node mm/slub.c:5218 [inline]
 __kmalloc_node_track_caller_noprof+0x4f6/0x1750 mm/slub.c:5327
 kmemdup_noprof+0x48/0x100 mm/util.c:138
 kmemdup_noprof include/linux/fortify-string.h:763 [inline]
 neigh_parms_alloc+0x94/0x9e0 net/core/neighbour.c:1772
 ipv6_add_dev+0x5aa/0x1d50 net/ipv6/addrconf.c:402
 addrconf_notify+0x808/0x1cf0 net/ipv6/addrconf.c:3654
 notifier_call_chain kernel/notifier.c:85 [inline]
 raw_notifier_call_chain+0x106/0x480 kernel/notifier.c:453
 call_netdevice_notifiers_info net/core/dev.c:2249 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers+0x191/0x260 net/core/dev.c:2301
 register_netdevice+0x24c8/0x28a0 net/core/dev.c:11449
 macvlan_common_newlink+0x15b9/0x23a0 drivers/net/macvlan.c:1546
 macvtap_newlink+0x173/0x250 drivers/net/macvtap.c:108
 rtnl_newlink_create+0x41c/0x1250 net/core/rtnetlink.c:3840
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x2b3c/0x39a0 net/core/rtnetlink.c:4072
 rtnetlink_rcv_msg+0x106f/0x14b0 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x54d/0x680 net/netlink/af_netlink.c:2550
 rtnetlink_rcv+0x35/0x40 net/core/rtnetlink.c:6985
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0xf04/0x12b0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x10b2/0x1250 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 __sys_sendto+0xa77/0xb90 net/socket.c:2206
 __do_compat_sys_socketcall net/compat.c:-1 [inline]
 __se_compat_sys_socketcall net/compat.c:423 [inline]
 __ia32_compat_sys_socketcall+0x717/0x1b70 net/compat.c:423
 ia32_sys_call+0x2c57/0x4360 arch/x86/include/generated/asm/syscalls_32.h:103
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 do_int80_emulation+0x15a/0x330 arch/x86/entry/syscall_32.c:172
 asm_int80_emulation+0x1f/0x30 arch/x86/include/asm/idtentry.h:621

CPU: 0 UID: 0 PID: 9234 Comm: syz.0.746 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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