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BUG: KMSAN: uninit-value in css_tryget include/linux/cgroup_refcnt.h:44 [inline]
BUG: KMSAN: uninit-value in get_mem_cgroup_from_mm+0x29c/0x4e0 mm/memcontrol.c:955
 css_tryget include/linux/cgroup_refcnt.h:44 [inline]
 get_mem_cgroup_from_mm+0x29c/0x4e0 mm/memcontrol.c:955
 __mem_cgroup_charge+0x39/0x2e0 mm/memcontrol.c:4608
 mem_cgroup_charge include/linux/memcontrol.h:642 [inline]
 shmem_alloc_and_add_folio+0xedd/0x1ca0 mm/shmem.c:1903
 shmem_get_folio_gfp+0xa6e/0x1ec0 mm/shmem.c:2533
 shmem_get_folio mm/shmem.c:2639 [inline]
 shmem_write_begin+0x151/0x430 mm/shmem.c:3289
 generic_perform_write+0x3f4/0x10c0 mm/filemap.c:4103
 shmem_file_write_iter+0x2b7/0x2f0 mm/shmem.c:3464
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0xb31/0x1560 fs/read_write.c:684
 ksys_write fs/read_write.c:736 [inline]
 __do_sys_write fs/read_write.c:747 [inline]
 __se_sys_write fs/read_write.c:744 [inline]
 __x64_sys_write+0x1fb/0x4d0 fs/read_write.c:744
 x64_sys_call+0x38c3/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x1b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 __netns_tracker_alloc include/net/net_namespace.h:357 [inline]
 sk_alloc+0x5de/0x8a0 net/core/sock.c:2270
 __netlink_create net/netlink/af_netlink.c:629 [inline]
 __netlink_kernel_create+0x19b/0xcc0 net/netlink/af_netlink.c:2007
 netlink_kernel_create include/linux/netlink.h:62 [inline]
 iscsi_transport_init+0x355/0x5b0 drivers/scsi/scsi_transport_iscsi.c:4982
 do_one_initcall+0x234/0xb60 init/main.c:1257
 do_initcall_level+0x166/0x380 init/main.c:1319
 do_initcalls+0x1b5/0x350 init/main.c:1335
 do_basic_setup+0x22/0x30 init/main.c:1354
 kernel_init_freeable+0x2fe/0x4d0 init/main.c:1567
 kernel_init+0x2f/0x5e0 init/main.c:1457
 ret_from_fork+0x6e/0x90 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

CPU: 1 UID: 0 PID: 8187 Comm: syz.5.408 Not tainted 6.15.0-rc3-syzkaller-00094-g02ddfb981de8 #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
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