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8926c6da1cb9f-48957ec306dmr1267884173.0.1715912342917; Thu, 16 May 2024 19:19:02 -0700 (PDT) Date: Thu, 16 May 2024 19:19:02 -0700 In-Reply-To: <20240517020336.158640-1-lizhi.xu@windriver.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000aa66a806189cf969@google.com> Subject: Re: [syzbot] [jfs?] KASAN: slab-out-of-bounds Write in diWrite From: syzbot To: linux-kernel@vger.kernel.org, lizhi.xu@windriver.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-out-of-bounds Read in jfs_readdir loop0: detected capacity change from 0 to 32768 lv: ffffc900028520b0 offset:0 diWrite lv: ffffc900028520b2 offset:6 diWrite lv: ffffc900028520b4 offset:0 diWrite lv: ffffc900028520b6 offset:0 diWrite ================================================================== BUG: KASAN: slab-out-of-bounds in jfs_readdir+0x1b79/0x4660 fs/jfs/jfs_dtree.c:2894 Read of size 1 at addr ffff888076df3d15 by task syz-executor.0/5492 CPU: 0 PID: 5492 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 jfs_readdir+0x1b79/0x4660 fs/jfs/jfs_dtree.c:2894 wrap_directory_iterator+0x94/0xe0 fs/readdir.c:67 iterate_dir+0x539/0x6f0 fs/readdir.c:110 __do_sys_getdents64 fs/readdir.c:409 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:394 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8966e7dea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f89669ff0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007f8966fabf80 RCX: 00007f8966e7dea9 RDX: 000000000000005d RSI: 00000000200002c0 RDI: 0000000000000005 RBP: 00007f8966eca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f8966fabf80 R15: 00007ffe3b2048e8 The buggy address belongs to the object at ffff888076df3780 which belongs to the cache jfs_ip of size 2240 The buggy address is located 1429 bytes inside of allocated 2240-byte region [ffff888076df3780, ffff888076df4040) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76df0 head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88802aef9f01 flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffffff() raw: 00fff80000000840 ffff8880197418c0 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff88802aef9f01 head: 00fff80000000840 ffff8880197418c0 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000001ffffffff ffff88802aef9f01 head: 00fff80000000003 ffffea0001db7c01 dead000000000122 00000000ffffffff head: 0000000800000000 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 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5490, tgid 1905245577 (syz-executor.0), ts 5492, free_ts 87323640300 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317 __alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page+0x5f/0x160 mm/slub.c:2175 allocate_slab mm/slub.c:2338 [inline] new_slab+0x84/0x2f0 mm/slub.c:2391 ___slab_alloc+0xc73/0x1260 mm/slub.c:3525 __slab_alloc mm/slub.c:3610 [inline] __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmem_cache_alloc_lru+0x253/0x350 mm/slub.c:3864 alloc_inode_sb include/linux/fs.h:3091 [inline] jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x69/0x1e0 fs/inode.c:1007 new_inode+0x22/0x1d0 fs/inode.c:1033 jfs_fill_super+0x408/0xc50 fs/jfs/super.c:544 mount_bdev+0x20a/0x2d0 fs/super.c:1658 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2a0 fs/super.c:1779 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 page last free pid 4525 tgid 4525 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x97b/0xaa0 mm/page_alloc.c:2347 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487 discard_slab mm/slub.c:2437 [inline] __put_partials+0xeb/0x130 mm/slub.c:2906 put_cpu_partial+0x17c/0x250 mm/slub.c:2981 __slab_free+0x2ea/0x3d0 mm/slub.c:4151 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x5e/0xc0 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc+0x174/0x340 mm/slub.c:3852 kmem_cache_zalloc include/linux/slab.h:739 [inline] lsm_file_alloc security/security.c:649 [inline] security_file_alloc+0x28/0x130 security/security.c:2709 init_file+0x99/0x200 fs/file_table.c:152 alloc_empty_file+0xb8/0x1d0 fs/file_table.c:206 path_openat+0xfb/0x3240 fs/namei.c:3785 do_filp_open+0x235/0x490 fs/namei.c:3826 do_sys_openat2+0x13e/0x1d0 fs/open.c:1406 do_sys_open fs/open.c:1421 [inline] __do_sys_openat fs/open.c:1437 [inline] __se_sys_openat fs/open.c:1432 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1432 Memory state around the buggy address: ffff888076df3c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888076df3c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888076df3d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888076df3d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888076df3e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== Tested on: commit: ed30a4a5 Linux 6.9-rc5 git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=12ba37b8980000 kernel config: https://syzkaller.appspot.com/x/.config?x=5a05c230e142f2bc dashboard link: https://syzkaller.appspot.com/bug?extid=aa6df9d3b383bf5f047f compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=12a532e0980000