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006d021491bc7-66d0d10b432mr5479618eaf.78.1770661587911; Mon, 09 Feb 2026 10:26:27 -0800 (PST) Date: Mon, 09 Feb 2026 10:26:27 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <698a26d3.050a0220.3b3015.007e.GAE@google.com> Subject: [syzbot] [mm?] [f2fs?] [exfat?] memory leak in __kfree_rcu_sheaf From: syzbot To: Liam.Howlett@oracle.com, akpm@linux-foundation.org, chao@kernel.org, jaegeuk@kernel.org, jannh@google.com, linkinjeon@kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, pfalcato@suse.de, sj1557.seo@samsung.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: e7aa57247700 Merge tag 'spi-fix-v6.19-rc8' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=122ae7fa580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9d7d0fbecb37bff8 dashboard link: https://syzkaller.appspot.com/bug?extid=cae7809e9dc1459e4e63 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=130e2944580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/28d29c9b5ae2/disk-e7aa5724.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0683244c7a0f/vmlinux-e7aa5724.xz kernel image: https://storage.googleapis.com/syzbot-assets/cd8cc5cb8b94/bzImage-e7aa5724.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/f78f58e821b0/mount_0.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=10f7165a580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cae7809e9dc1459e4e63@syzkaller.appspotmail.com BUG: memory leak unreferenced object 0xffff888113218600 (size 512): comm "sed", pid 6046, jiffies 4294945902 hex dump (first 32 bytes): 00 8e 13 29 81 88 ff ff 00 12 86 27 81 88 ff ff ...).......'.... 00 5a 04 00 81 88 ff ff 00 00 00 00 00 00 00 00 .Z.............. backtrace (crc 49909e19): 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] alloc_empty_sheaf+0x36/0x50 mm/slub.c:2618 __kfree_rcu_sheaf+0x155/0x210 mm/slub.c:6304 kfree_rcu_sheaf mm/slab_common.c:1631 [inline] kvfree_call_rcu+0x202/0x3d0 mm/slab_common.c:1981 ma_free_rcu lib/maple_tree.c:208 [inline] ma_free_rcu+0x29/0x40 lib/maple_tree.c:205 mas_free lib/maple_tree.c:1174 [inline] mas_replace_node lib/maple_tree.c:1581 [inline] mas_wr_node_store+0x5fc/0x730 lib/maple_tree.c:3553 mas_wr_store_entry+0x4eb/0x760 lib/maple_tree.c:3764 mas_store_prealloc+0x358/0x740 lib/maple_tree.c:5169 vma_iter_store_overwrite mm/vma.h:544 [inline] commit_merge+0x28e/0x490 mm/vma.c:763 vma_expand+0x264/0x460 mm/vma.c:1200 vma_merge_new_range+0xe3/0x350 mm/vma.c:1099 __mmap_region+0x54b/0x15b0 mm/vma.c:2747 mmap_region+0xfb/0x1e0 mm/vma.c:2830 do_mmap+0x7ac/0xb80 mm/mmap.c:558 vm_mmap_pgoff+0x1a6/0x2d0 mm/util.c:581 ksys_mmap_pgoff+0x233/0x2d0 mm/mmap.c:604 BUG: memory leak unreferenced object 0xffff888127861200 (size 512): comm "udevd", pid 6236, jiffies 4294948784 hex dump (first 32 bytes): 00 86 21 13 81 88 ff ff 18 e0 05 00 81 88 ff ff ..!............. 00 5a 04 00 81 88 ff ff 00 00 00 00 00 00 00 00 .Z.............. backtrace (crc 5b72581e): 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] alloc_empty_sheaf+0x36/0x50 mm/slub.c:2618 __kfree_rcu_sheaf+0x155/0x210 mm/slub.c:6304 kfree_rcu_sheaf mm/slab_common.c:1631 [inline] kvfree_call_rcu+0x202/0x3d0 mm/slab_common.c:1981 ma_free_rcu lib/maple_tree.c:208 [inline] ma_free_rcu+0x29/0x40 lib/maple_tree.c:205 mas_topiary_node lib/maple_tree.c:2311 [inline] mas_topiary_node lib/maple_tree.c:2299 [inline] mas_topiary_replace+0xb0f/0x1400 lib/maple_tree.c:2410 mas_wmb_replace lib/maple_tree.c:2433 [inline] mas_spanning_rebalance+0x14e1/0x24b0 lib/maple_tree.c:2738 mas_wr_spanning_store+0x983/0x10d0 lib/maple_tree.c:3479 mas_wr_store_entry+0x4d5/0x760 lib/maple_tree.c:3767 mas_store_gfp+0x341/0x640 lib/maple_tree.c:5138 vma_iter_clear_gfp include/linux/mm.h:1141 [inline] do_vmi_align_munmap+0x259/0x2d0 mm/vma.c:1574 do_vmi_munmap+0x17c/0x280 mm/vma.c:1627 __vm_munmap+0xec/0x200 mm/vma.c:3247 __do_sys_munmap mm/mmap.c:1077 [inline] __se_sys_munmap mm/mmap.c:1074 [inline] __x64_sys_munmap+0x1f/0x30 mm/mmap.c:1074 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 0xffff88812c458000 (size 4480): comm "udevd", pid 5181, jiffies 4294950983 hex dump (first 32 bytes): 01 00 08 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 80 00 00 00 00 00 00 00 ................ backtrace (crc ad4af9e6): 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 __do_sys_clone+0x7f/0xb0 kernel/fork.c:2792 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 0xffff8881274a1540 (size 184): comm "udevd", pid 5181, jiffies 4294950983 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 54e589bc): 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 __do_sys_clone+0x7f/0xb0 kernel/fork.c:2792 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 0xffff888109639020 (size 32): comm "udevd", pid 5181, jiffies 4294950983 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 __do_sys_clone+0x7f/0xb0 kernel/fork.c:2792 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 0xffff888126fdbd80 (size 64): comm "udevd", pid 5181, jiffies 4294950983 hex dump (first 32 bytes): c0 c3 4e 46 81 88 ff ff 00 00 00 00 00 00 00 00 ..NF............ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 508a43e4): 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 __do_sys_clone+0x7f/0xb0 kernel/fork.c:2792 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 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup