{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-15T19:04:11.245918400Z","vulnerabilities":[{"cve":{"id":"CVE-2023-53862","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-12-09T16:17:26.970","lastModified":"2026-04-15T00:35:42.020","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nhfs: fix missing hfs_bnode_get() in __hfs_bnode_create\n\nSyzbot found a kernel BUG in hfs_bnode_put():\n\n kernel BUG at fs/hfs/bnode.c:466!\n invalid opcode: 0000 [#1] PREEMPT SMP KASAN\n CPU: 0 PID: 3634 Comm: kworker/u4:5 Not tainted 6.1.0-rc7-syzkaller-00190-g97ee9d1c1696 #0\n Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022\n Workqueue: writeback wb_workfn (flush-7:0)\n RIP: 0010:hfs_bnode_put+0x46f/0x480 fs/hfs/bnode.c:466\n Code: 8a 80 ff e9 73 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c a0 fe ff ff 48 89 df e8 db 8a 80 ff e9 93 fe ff ff e8 a1 68 2c ff <0f> 0b e8 9a 68 2c ff 0f 0b 0f 1f 84 00 00 00 00 00 55 41 57 41 56\n RSP: 0018:ffffc90003b4f258 EFLAGS: 00010293\n RAX: ffffffff825e318f RBX: 0000000000000000 RCX: ffff8880739dd7c0\n RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000\n RBP: ffffc90003b4f430 R08: ffffffff825e2d9b R09: ffffed10045157d1\n R10: ffffed10045157d1 R11: 1ffff110045157d0 R12: ffff8880228abe80\n R13: ffff88807016c000 R14: dffffc0000000000 R15: ffff8880228abe00\n FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007fa6ebe88718 CR3: 000000001e93d000 CR4: 00000000003506f0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n  <TASK>\n  hfs_write_inode+0x1bc/0xb40\n  write_inode fs/fs-writeback.c:1440 [inline]\n  __writeback_single_inode+0x4d6/0x670 fs/fs-writeback.c:1652\n  writeback_sb_inodes+0xb3b/0x18f0 fs/fs-writeback.c:1878\n  __writeback_inodes_wb+0x125/0x420 fs/fs-writeback.c:1949\n  wb_writeback+0x440/0x7b0 fs/fs-writeback.c:2054\n  wb_check_start_all fs/fs-writeback.c:2176 [inline]\n  wb_do_writeback fs/fs-writeback.c:2202 [inline]\n  wb_workfn+0x827/0xef0 fs/fs-writeback.c:2235\n  process_one_work+0x877/0xdb0 kernel/workqueue.c:2289\n  worker_thread+0xb14/0x1330 kernel/workqueue.c:2436\n  kthread+0x266/0x300 kernel/kthread.c:376\n  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n  </TASK>\n\nThe BUG_ON() is triggered at here:\n\n/* Dispose of resources used by a node */\nvoid hfs_bnode_put(struct hfs_bnode *node)\n{\n\tif (node) {\n \t\t<skipped>\n \t\tBUG_ON(!atomic_read(&node->refcnt)); <- we have issue here!!!!\n \t\t<skipped>\n \t}\n}\n\nBy tracing the refcnt, I found the node is created by hfs_bmap_alloc()\nwith refcnt 1.  Then the node is used by hfs_btree_write().  There is a\nmissing of hfs_bnode_get() after find the node.  The issue happened in\nfollowing path:\n\n<alloc>\n hfs_bmap_alloc\n   hfs_bnode_find\n     __hfs_bnode_create   <- allocate a new node with refcnt 1.\n   hfs_bnode_put          <- decrease the refcnt\n\n<write>\n hfs_btree_write\n   hfs_bnode_find\n     __hfs_bnode_create\n       hfs_bnode_findhash <- find the node without refcnt increased.\n   hfs_bnode_put\t  <- trigger the BUG_ON() since refcnt is 0."}],"metrics":{},"references":[{"url":"https://git.kernel.org/stable/c/062af3e9930762d1fd22946748d34e0d859e4a8e","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2cab8db14566cf6a516c1f103a60cf6b7f54b1e5","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/38d72e6604b9f96dffcc0565090cc01622a37b2a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3a9065a33988c02789722be612f7c42fb8ebbb22","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8140cdc57bc5844cd5e1392673ec2dbf8fdc6940","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a9dc087fd3c484fd1ed18c5efb290efaaf44ce03","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dc9f78b6d254427a06e568f2887b1011ef3143ef","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eda6879272e4df5456afc36642052ea066f58410","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}]}}]}