memory leak in __kthread_create_on

Title	Replies (including bot)	Last reply
[syzbot] [gfs2?] memory leak in __kthread_create_on_node	1 (7)	2026/02/04 18:54
[PATCH v2] gfs2: fix memory leaks in gfs2_fill_super error path	1 (1)	2026/02/03 02:20
[PATCH] gfs2: fix memory leaks in gfs2_fill_super error path	2 (2)	2026/02/02 18:57

Title

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[syzbot] [gfs2?] memory leak in __kthread_create_on_node

1 (7)

2026/02/04 18:54

[PATCH v2] gfs2: fix memory leaks in gfs2_fill_super error path

1 (1)

2026/02/03 02:20

[PATCH] gfs2: fix memory leaks in gfs2_fill_super error path

2 (2)

2026/02/02 18:57


Created	Duration	User	Patch	Repo	Result
2026/02/04 18:54	20m	agruenba@redhat.com		git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git for-next	report log
2026/02/04 11:39	21m	agruenba@redhat.com		git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git for-next	error
2026/02/03 10:01	21m	agruenba@redhat.com		git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git for-next	error
2026/01/31 02:38	36m	kartikey406@gmail.com	patch	upstream	report log
2026/01/30 14:37	29m	kartikey406@gmail.com	patch	upstream	report log

BUG: memory leak unreferenced object 0xffff888125a2dec0 (size 32): comm "syz.4.75", pid 6411, jiffies 4294948981 hex dump (first 32 bytes): 67 66 73 32 5f 6c 6f 67 64 2f 73 79 7a 3a 73 79 gfs2_logd/syz:sy 7a 2e 30 00 00 00 00 00 00 00 00 00 00 00 00 00 z.0............. backtrace (crc d543dd03): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] __do_kmalloc_node mm/slub.c:5656 [inline] __kmalloc_node_track_caller_noprof+0x47b/0x690 mm/slub.c:5768 kvasprintf+0x6e/0xf0 lib/kasprintf.c:25 __kthread_create_on_node+0x9e/0x1c0 kernel/kthread.c:519 kthread_create_on_node+0x73/0xa0 kernel/kthread.c:587 init_threads fs/gfs2/ops_fstype.c:1065 [inline] gfs2_fill_super+0xdf8/0x1210 fs/gfs2/ops_fstype.c:1265 get_tree_bdev_flags+0x1c0/0x290 fs/super.c:1691 gfs2_get_tree+0x26/0xd0 fs/gfs2/ops_fstype.c:1332 vfs_get_tree+0x30/0x120 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount fs/namespace.c:3712 [inline] path_mount+0x5a9/0x1350 fs/namespace.c:4022 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount fs/namespace.c:4201 [inline] __x64_sys_mount+0x1a3/0x1e0 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff888126a2a300 (size 4480): comm "kthreadd", pid 2, jiffies 4294948981 hex dump (first 32 bytes): 00 00 08 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 01 00 00 00 80 00 00 00 00 00 00 00 ................ backtrace (crc 4b33760e): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_node_noprof+0x422/0x590 mm/slub.c:5315 alloc_task_struct_node kernel/fork.c:184 [inline] dup_task_struct kernel/fork.c:915 [inline] copy_process+0x286/0x2870 kernel/fork.c:2052 kernel_clone+0xac/0x6e0 kernel/fork.c:2651 kernel_thread+0x80/0xb0 kernel/fork.c:2712 create_kthread kernel/kthread.c:486 [inline] kthreadd+0x196/0x260 kernel/kthread.c:844 ret_from_fork+0x23c/0x320 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 BUG: memory leak unreferenced object 0xffff888109c85180 (size 184): comm "kthreadd", pid 2, jiffies 4294948981 hex dump (first 32 bytes): 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc c5f4f48b): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x412/0x580 mm/slub.c:5270 prepare_creds+0x22/0x600 kernel/cred.c:185 copy_creds+0x44/0x290 kernel/cred.c:286 copy_process+0x7a7/0x2870 kernel/fork.c:2086 kernel_clone+0xac/0x6e0 kernel/fork.c:2651 kernel_thread+0x80/0xb0 kernel/fork.c:2712 create_kthread kernel/kthread.c:486 [inline] kthreadd+0x196/0x260 kernel/kthread.c:844 ret_from_fork+0x23c/0x320 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 BUG: memory leak unreferenced object 0xffff888102bd9780 (size 32): comm "kthreadd", pid 2, jiffies 4294948981 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ f8 52 86 00 81 88 ff ff 00 00 00 00 00 00 00 00 .R.............. backtrace (crc 336e1c5f): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] __do_kmalloc_node mm/slub.c:5656 [inline] __kmalloc_noprof+0x465/0x680 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] lsm_blob_alloc+0x4d/0x80 security/security.c:192 lsm_cred_alloc security/security.c:209 [inline] security_prepare_creds+0x2d/0x290 security/security.c:2763 prepare_creds+0x395/0x600 kernel/cred.c:215 copy_creds+0x44/0x290 kernel/cred.c:286 copy_process+0x7a7/0x2870 kernel/fork.c:2086 kernel_clone+0xac/0x6e0 kernel/fork.c:2651 kernel_thread+0x80/0xb0 kernel/fork.c:2712 create_kthread kernel/kthread.c:486 [inline] kthreadd+0x196/0x260 kernel/kthread.c:844 ret_from_fork+0x23c/0x320 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 BUG: memory leak unreferenced object 0xffff8881098abc00 (size 192): comm "kthreadd", pid 2, jiffies 4294948981 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff ................ 01 00 00 00 00 00 00 00 80 d5 78 82 ff ff ff ff ..........x..... backtrace (crc 1df624ea): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] __kmalloc_cache_noprof+0x41a/0x590 mm/slub.c:5775 kmalloc_noprof include/linux/slab.h:957 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] set_kthread_struct+0x58/0x150 kernel/kthread.c:125 copy_process+0x1569/0x2870 kernel/fork.c:2150 kernel_clone+0xac/0x6e0 kernel/fork.c:2651 kernel_thread+0x80/0xb0 kernel/fork.c:2712 create_kthread kernel/kthread.c:486 [inline] kthreadd+0x196/0x260 kernel/kthread.c:844 ret_from_fork+0x23c/0x320 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 BUG: memory leak unreferenced object 0xffff88812baec5c0 (size 64): comm "kthreadd", pid 2, jiffies 4294948981 hex dump (first 32 bytes): e0 35 8f 89 ff ff ff ff 00 00 00 00 00 00 00 00 .5.............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 8e7806b9): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] __do_kmalloc_node mm/slub.c:5656 [inline] __kmalloc_noprof+0x465/0x680 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] lsm_blob_alloc+0x4d/0x80 security/security.c:192 lsm_task_alloc security/security.c:244 [inline] security_task_alloc+0x2a/0x260 security/security.c:2682 copy_process+0xf07/0x2870 kernel/fork.c:2203 kernel_clone+0xac/0x6e0 kernel/fork.c:2651 kernel_thread+0x80/0xb0 kernel/fork.c:2712 create_kthread kernel/kthread.c:486 [inline] kthreadd+0x196/0x260 kernel/kthread.c:844 ret_from_fork+0x23c/0x320 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 BUG: memory leak unreferenced object 0xffff888101e37a80 (size 1152): comm "kthreadd", pid 2, jiffies 4294948981 hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 90 7a e3 01 81 88 ff ff 90 7a e3 01 81 88 ff ff .z.......z...... backtrace (crc 1d024e88): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x412/0x580 mm/slub.c:5270 copy_signal kernel/fork.c:1699 [inline] copy_process+0x1102/0x2870 kernel/fork.c:2218 kernel_clone+0xac/0x6e0 kernel/fork.c:2651 kernel_thread+0x80/0xb0 kernel/fork.c:2712 create_kthread kernel/kthread.c:486 [inline] kthreadd+0x196/0x260 kernel/kthread.c:844 ret_from_fork+0x23c/0x320 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/01/29 10:26	upstream	8dfce8991b95	b78a7341	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)]	ci-upstream-gce-leak	memory leak in __kthread_create_on_node

Crashes (1):

Assets (help?)