ext4 filesystem being mounted at /203/file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa supports timestamps until 2038-01-19 (0x7fffffff)
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BUG: KMSAN: uninit-value in hex_string+0x70d/0x810 lib/vsprintf.c:1199
 hex_string+0x70d/0x810 lib/vsprintf.c:1199
 pointer+0x2d0/0x1b30 lib/vsprintf.c:2437
 vsnprintf+0x1206/0x1a10 lib/vsprintf.c:2847
 seq_vprintf fs/seq_file.c:391 [inline]
 seq_printf+0x261/0x390 fs/seq_file.c:406
 dev_mc_seq_show+0x25c/0x3f0 net/core/net-procfs.c:343
 seq_read_iter+0x1430/0x20e0 fs/seq_file.c:272
 seq_read+0x4ef/0x5d0 fs/seq_file.c:162
 pde_read fs/proc/inode.c:308 [inline]
 proc_reg_read+0x261/0x4b0 fs/proc/inode.c:320
 vfs_read+0x29f/0xf70 fs/read_write.c:563
 ksys_read+0x240/0x4b0 fs/read_write.c:708
 __do_sys_read fs/read_write.c:717 [inline]
 __se_sys_read fs/read_write.c:715 [inline]
 __x64_sys_read+0x93/0xe0 fs/read_write.c:715
 x64_sys_call+0x314c/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4121 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 __kmalloc_cache_noprof+0x8e3/0xdf0 mm/slub.c:4320
 kmalloc_noprof include/linux/slab.h:901 [inline]
 __hw_addr_create net/core/dev_addr_lists.c:60 [inline]
 __hw_addr_add_ex+0x34c/0xcb0 net/core/dev_addr_lists.c:118
 __dev_mc_add net/core/dev_addr_lists.c:868 [inline]
 dev_mc_add+0x9a/0x140 net/core/dev_addr_lists.c:886
 ip_mc_filter_add net/ipv4/igmp.c:1157 [inline]
 igmp_group_added+0x23e/0xd40 net/ipv4/igmp.c:1346
 ____ip_mc_inc_group+0xf03/0x1000 net/ipv4/igmp.c:1557
 __ip_mc_inc_group net/ipv4/igmp.c:1567 [inline]
 ip_mc_inc_group net/ipv4/igmp.c:1573 [inline]
 ip_mc_up+0x171/0x310 net/ipv4/igmp.c:1874
 inetdev_event+0x237a/0x24c0 net/ipv4/devinet.c:1639
 notifier_call_chain kernel/notifier.c:85 [inline]
 raw_notifier_call_chain+0xe8/0x440 kernel/notifier.c:453
 call_netdevice_notifiers_info+0x1be/0x2b0 net/core/dev.c:2206
 call_netdevice_notifiers_extack net/core/dev.c:2244 [inline]
 call_netdevice_notifiers net/core/dev.c:2258 [inline]
 dev_open+0x154/0x1b0 net/core/dev.c:1676
 bond_setup_by_slave+0x421/0x4f0 drivers/net/bonding/bond_main.c:1648
 bond_enslave+0xb9c/0x5180 drivers/net/bonding/bond_main.c:2043
 do_set_master net/core/rtnetlink.c:2926 [inline]
 rtnl_newlink_create+0xc62/0x11a0 net/core/rtnetlink.c:3813
 __rtnl_newlink net/core/rtnetlink.c:3907 [inline]
 rtnl_newlink+0x290b/0x3850 net/core/rtnetlink.c:4022
 rtnetlink_rcv_msg+0x1061/0x1410 net/core/rtnetlink.c:6912
 netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2533
 rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6939
 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
 netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1338
 netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1882
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x30f/0x380 net/socket.c:733
 ____sys_sendmsg+0x890/0xda0 net/socket.c:2573
 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2627
 __sys_sendmsg net/socket.c:2659 [inline]
 __do_sys_sendmsg net/socket.c:2664 [inline]
 __se_sys_sendmsg net/socket.c:2662 [inline]
 __x64_sys_sendmsg+0x212/0x3c0 net/socket.c:2662
 x64_sys_call+0x2ed6/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 11428 Comm: syz.2.1390 Not tainted 6.14.0-rc5-syzkaller-00016-g48a5eed9ad58 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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