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Wed, 02 Oct 2024 00:34:02 -0700 (PDT) Date: Wed, 02 Oct 2024 00:34:02 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <66fcf76a.050a0220.f28ec.04fb.GAE@google.com> Subject: Re: [syzbot] [hfs?] KMSAN: uninit-value in __hfs_ext_cache_extent (2) From: syzbot To: linux-kernel@vger.kernel.org, surajsonawane0215@gmail.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: KMSAN: uninit-value in __hfs_ext_cache_extent loop0: detected capacity change from 0 to 64 ===================================================== BUG: KMSAN: uninit-value in __hfs_ext_read_extent fs/hfs/extent.c:161 [inline] BUG: KMSAN: uninit-value in __hfs_ext_cache_extent+0x6d4/0x820 fs/hfs/extent.c:181 __hfs_ext_read_extent fs/hfs/extent.c:161 [inline] __hfs_ext_cache_extent+0x6d4/0x820 fs/hfs/extent.c:181 hfs_ext_read_extent fs/hfs/extent.c:204 [inline] hfs_get_block+0x733/0xf50 fs/hfs/extent.c:368 __block_write_begin_int+0xa6b/0x2f80 fs/buffer.c:2121 block_write_begin fs/buffer.c:2231 [inline] cont_write_begin+0xf82/0x1940 fs/buffer.c:2582 hfs_write_begin+0x85/0x120 fs/hfs/inode.c:52 cont_expand_zero fs/buffer.c:2509 [inline] cont_write_begin+0x32f/0x1940 fs/buffer.c:2572 hfs_write_begin+0x85/0x120 fs/hfs/inode.c:52 hfs_file_truncate+0x1a5/0xd30 fs/hfs/extent.c:496 hfs_inode_setattr+0x998/0xab0 fs/hfs/inode.c:654 notify_change+0x1a8e/0x1b80 fs/attr.c:503 do_truncate+0x22a/0x2b0 fs/open.c:65 vfs_truncate+0x5d4/0x680 fs/open.c:111 do_sys_truncate+0x104/0x240 fs/open.c:134 __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __x64_sys_truncate+0x6c/0xa0 fs/open.c:144 x64_sys_call+0x2ce3/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:77 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:4092 [inline] slab_alloc_node mm/slub.c:4135 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x661/0xf30 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] hfs_find_init+0x91/0x250 fs/hfs/bfind.c:21 hfs_ext_read_extent fs/hfs/extent.c:202 [inline] hfs_get_block+0x68d/0xf50 fs/hfs/extent.c:368 __block_write_begin_int+0xa6b/0x2f80 fs/buffer.c:2121 block_write_begin fs/buffer.c:2231 [inline] cont_write_begin+0xf82/0x1940 fs/buffer.c:2582 hfs_write_begin+0x85/0x120 fs/hfs/inode.c:52 cont_expand_zero fs/buffer.c:2509 [inline] cont_write_begin+0x32f/0x1940 fs/buffer.c:2572 hfs_write_begin+0x85/0x120 fs/hfs/inode.c:52 hfs_file_truncate+0x1a5/0xd30 fs/hfs/extent.c:496 hfs_inode_setattr+0x998/0xab0 fs/hfs/inode.c:654 notify_change+0x1a8e/0x1b80 fs/attr.c:503 do_truncate+0x22a/0x2b0 fs/open.c:65 vfs_truncate+0x5d4/0x680 fs/open.c:111 do_sys_truncate+0x104/0x240 fs/open.c:134 __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __x64_sys_truncate+0x6c/0xa0 fs/open.c:144 x64_sys_call+0x2ce3/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:77 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 1 UID: 0 PID: 6040 Comm: syz.0.15 Not tainted 6.12.0-rc1-syzkaller-ge32cde8d2bd7-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ===================================================== Tested on: commit: e32cde8d Merge tag 'sched_ext-for-6.12-rc1-fixes-1' of.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1106539f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=b1fd45f2013d812f dashboard link: https://syzkaller.appspot.com/bug?extid=d395b0c369e492a17530 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=1363a580580000