memory leak in adfs_init_fs_context

Status: upstream: reported C repro on 2025/12/13 19:01
Subsystems: fs
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+1c70732df5fd4f0e4fbb@syzkaller.appspotmail.com
First crash: 234d, last: 13d
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
e57eff95 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ memory leak in adfs_init_fs_context 2026/05/25 02:14 2026/05/25 02:14 2026/05/25 03:00 c69befb3 

			
				
	

	
	



			

		

	

	
	

		

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			[PATCH] adfs: fix memory leak in sb->s_fs_info
			8 (8)
			2025/12/15 03:14
		

	
		

			[syzbot] [fs?] memory leak in adfs_init_fs_context
			0 (6)
			2025/12/14 23:39
		

	
	




			
			
		

	

	
	

		

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			Last patch testing requests (9)
		

		

			
			

	

		
		
		

			
			Created
			Duration
			User
			Patch
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				2026/07/19 00:44
				
					29m
				
				
					
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				2026/07/19 00:44
				
					21m
				
				
					
						retest repro
					
				
				
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				2026/05/08 04:16
				
					26m
				
				
					
						retest repro
					
				
				
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				2026/02/22 21:29
				
					1h27m
				
				
					
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				2025/12/14 23:39
				
					30m
				
				
					
						eraykrdg1@gmail.com
					
				
				patch
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						OK
						
					
					
					
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				2025/12/14 22:27
				
					15m
				
				
					
						eraykrdg1@gmail.com
					
				
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				2025/12/14 21:58
				
					19m
				
				
					
						eraykrdg1@gmail.com
					
				
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				2025/12/14 20:59
				
					14m
				
				
					
						eraykrdg1@gmail.com
					
				
				
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				2025/12/13 22:36
				
					21m
				
				
					
						eraykrdg1@gmail.com
					
				
				patch
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						OK
						
					
					
					
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Sample crash report:

	
BUG: memory leak
unreferenced object 0xffff888126345900 (size 64):
  comm "syz.0.18", pid 6076, jiffies 4294944529
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 c0 01 3f 00 00 00 00 00  ..........?.....
  backtrace (crc 45941a6b):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4953 [inline]
    slab_alloc_node mm/slub.c:5258 [inline]
    __kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5766
    kmalloc_noprof include/linux/slab.h:957 [inline]
    kzalloc_noprof include/linux/slab.h:1094 [inline]
    adfs_init_fs_context+0x26/0xe0 fs/adfs/super.c:440
    alloc_fs_context+0x2a0/0x6e0 fs/fs_context.c:315
    do_new_mount fs/namespace.c:3692 [inline]
    path_mount+0x93f/0x1320 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+0x1a2/0x1e0 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 0xffff888126345f40 (size 64):
  comm "syz.0.19", pid 6079, jiffies 4294944531
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 c0 01 3f 00 00 00 00 00  ..........?.....
  backtrace (crc 45941a6b):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4953 [inline]
    slab_alloc_node mm/slub.c:5258 [inline]
    __kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5766
    kmalloc_noprof include/linux/slab.h:957 [inline]
    kzalloc_noprof include/linux/slab.h:1094 [inline]
    adfs_init_fs_context+0x26/0xe0 fs/adfs/super.c:440
    alloc_fs_context+0x2a0/0x6e0 fs/fs_context.c:315
    do_new_mount fs/namespace.c:3692 [inline]
    path_mount+0x93f/0x1320 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+0x1a2/0x1e0 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 0xffff88812636ad40 (size 64):
  comm "syz.0.20", pid 6128, jiffies 4294945167
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 c0 01 3f 00 00 00 00 00  ..........?.....
  backtrace (crc 45941a6b):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4953 [inline]
    slab_alloc_node mm/slub.c:5258 [inline]
    __kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5766
    kmalloc_noprof include/linux/slab.h:957 [inline]
    kzalloc_noprof include/linux/slab.h:1094 [inline]
    adfs_init_fs_context+0x26/0xe0 fs/adfs/super.c:440
    alloc_fs_context+0x2a0/0x6e0 fs/fs_context.c:315
    do_new_mount fs/namespace.c:3692 [inline]
    path_mount+0x93f/0x1320 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+0x1a2/0x1e0 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 0xffff888126345b40 (size 64):
  comm "syz.0.21", pid 6129, jiffies 4294945168
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 c0 01 3f 00 00 00 00 00  ..........?.....
  backtrace (crc 45941a6b):
    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
    slab_post_alloc_hook mm/slub.c:4953 [inline]
    slab_alloc_node mm/slub.c:5258 [inline]
    __kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5766
    kmalloc_noprof include/linux/slab.h:957 [inline]
    kzalloc_noprof include/linux/slab.h:1094 [inline]
    adfs_init_fs_context+0x26/0xe0 fs/adfs/super.c:440
    alloc_fs_context+0x2a0/0x6e0 fs/fs_context.c:315
    do_new_mount fs/namespace.c:3692 [inline]
    path_mount+0x93f/0x1320 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+0x1a2/0x1e0 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

connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF



	

	



	Crashes (2):
		
		

			Time
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			2025/12/09 18:51
			upstream
			cb015814f8b6
			d6526ea3
			.config
			console log
			report
			syz / log
			C
			
			
				[disk image]
			
				[vmlinux]
			
				[kernel image]
			
			ci-upstream-gce-leak
			memory leak in adfs_init_fs_context
		

		
		

			2026/07/03 13:44
			upstream
			87320be9f0d2
			58bf2096
			.config
			console log
			report
			syz / log
			
			
			
				[disk image]
			
				[vmlinux]
			
				[kernel image]
			
			ci-upstream-gce-leak
			memory leak in adfs_init_fs_context
		

		
		


* Struck through repros no longer work on HEAD.