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List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a0d:b0:3d0:10ec:cc36 with SMTP id e9e14a558f8ab-3d17bf3acdamr22126015ab.11.1739357850608; Wed, 12 Feb 2025 02:57:30 -0800 (PST) Date: Wed, 12 Feb 2025 02:57:30 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67ac7e9a.050a0220.3d72c.0150.GAE@google.com> Subject: [syzbot] [jfs?] KASAN: slab-out-of-bounds Read in ea_get (4) From: syzbot To: jfs-discussion@lists.sourceforge.net, linux-kernel@vger.kernel.org, shaggy@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 7ee983c850b4 Merge tag 'drm-fixes-2025-02-08' of https://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14a8dca4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1909f2f0d8e641ce dashboard link: https://syzkaller.appspot.com/bug?extid=4e6e7e4279d046613bc5 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11bf61b0580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12a8dca4580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-7ee983c8.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f2f78699fc41/vmlinux-7ee983c8.xz kernel image: https://storage.googleapis.com/syzbot-assets/ca55e6e8dd01/bzImage-7ee983c8.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/b234819f8863/mount_0.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=10a8dca4580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+4e6e7e4279d046613bc5@syzkaller.appspotmail.com ffff88804566b698: 90 b6 66 45 80 88 ff ff 00 00 00 00 00 00 00 00 ..fE............ ffff88804566b6a8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ffff88804566b6b8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ================================================================== BUG: KASAN: slab-out-of-bounds in hex_dump_to_buffer+0x731/0xba0 lib/hexdump.c:193 Read of size 1 at addr ffff88804566b6d0 by task syz-executor271/5307 CPU: 0 UID: 0 PID: 5307 Comm: syz-executor271 Not tainted 6.14.0-rc1-syzkaller-00181-g7ee983c850b4 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 hex_dump_to_buffer+0x731/0xba0 lib/hexdump.c:193 print_hex_dump+0x13f/0x250 lib/hexdump.c:276 ea_get+0xd30/0x12e0 fs/jfs/xattr.c:565 __jfs_setxattr+0xfc/0x1190 fs/jfs/xattr.c:675 __jfs_xattr_set+0xf9/0x180 fs/jfs/xattr.c:936 __vfs_setxattr+0x468/0x4a0 fs/xattr.c:200 __vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234 vfs_setxattr+0x221/0x430 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x2af/0x430 fs/xattr.c:665 path_setxattrat+0x440/0x510 fs/xattr.c:713 __do_sys_lsetxattr fs/xattr.c:754 [inline] __se_sys_lsetxattr fs/xattr.c:750 [inline] __x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:750 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fee5a1fde19 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff6b319538 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007fee5a247095 RCX: 00007fee5a1fde19 RDX: 0000000000000000 RSI: 0000400000002580 RDI: 0000400000000080 RBP: 00007fee5a27a5f0 R08: 0000000000000001 R09: 00005555596ac4c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff6b319560 R13: 00007fff6b319788 R14: 431bde82d7b634db R15: 00007fee5a24703b Allocated by task 5307: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_lru_noprof+0x1dd/0x390 mm/slub.c:4183 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x65/0x1a0 fs/inode.c:336 iget_locked+0xf1/0x5a0 fs/inode.c:1487 jfs_iget+0x23/0x3e0 fs/jfs/inode.c:29 jfs_lookup+0x226/0x410 fs/jfs/namei.c:1469 __lookup_slow+0x296/0x400 fs/namei.c:1793 lookup_slow+0x53/0x70 fs/namei.c:1810 walk_component+0x2e1/0x410 fs/namei.c:2114 lookup_last fs/namei.c:2612 [inline] path_lookupat+0x16f/0x450 fs/namei.c:2636 filename_lookup+0x2a3/0x670 fs/namei.c:2665 filename_setxattr+0xb9/0x430 fs/xattr.c:660 path_setxattrat+0x440/0x510 fs/xattr.c:713 __do_sys_lsetxattr fs/xattr.c:754 [inline] __se_sys_lsetxattr fs/xattr.c:750 [inline] __x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:750 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88804566ae18 which belongs to the cache jfs_ip of size 2232 The buggy address is located 0 bytes to the right of allocated 2232-byte region [ffff88804566ae18, ffff88804566b6d0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x45668 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff88801f64b780 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000000f5000000 0000000000000000 head: 04fff00000000040 ffff88801f64b780 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000000f5000000 0000000000000000 head: 04fff00000000003 ffffea0001159a01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE), pid 5307, tgid 5307 (syz-executor271), ts 63066622694, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2587 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] kmem_cache_alloc_lru_noprof+0x26c/0x390 mm/slub.c:4183 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x65/0x1a0 fs/inode.c:336 new_inode_pseudo fs/inode.c:1174 [inline] new_inode+0x22/0x1d0 fs/inode.c:1193 jfs_fill_super+0x570/0xd90 fs/jfs/super.c:511 get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3560 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088 page_owner free stack trace missing Memory state around the buggy address: ffff88804566b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88804566b600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88804566b680: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ^ ffff88804566b700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88804566b780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- 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