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AJvYcCXCEd0/2cje0RA7xLsM0im5MeI2Z51TX0qJcit/PNBDdmE9eC3gtGpQGSvUo8JK1wS5tWhl3RGJMkjSwb21Ag==@vger.kernel.org X-Gm-Message-State: AOJu0Ywo95ZOrD8tlr5Xmr5FufVLtrjg8px+hvLQG9cwH5Gf1qqd03LU 8hwPJcj59yYAdGeWOqK+srAokMREwEk9zP/L6Kj6y6vM2fp3H6MyDfmOE1cptxKtJh19CzVyOiF c/ADJIg88SiXc/bIqRoO+K+Rzqep65u02SYfcM2ofjCi8/EAJtQCSfBU= X-Google-Smtp-Source: AGHT+IEP9cyVf93ub+Aj2npRF8DmXFOoD3HdJOjGkXnYLfJ/FcLsNOIkPOpaEqQ1UpLHpF3DGE8viofcWgEwvrQYG9Aa+FKwOvUl Precedence: bulk X-Mailing-List: linux-bcachefs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:20c5:b0:3a0:be93:e8d5 with SMTP id e9e14a558f8ab-3a375a9e2aemr136800145ab.11.1728376142804; Tue, 08 Oct 2024 01:29:02 -0700 (PDT) Date: Tue, 08 Oct 2024 01:29:02 -0700 In-Reply-To: <6668bb9a-4775-4549-b24a-54b1f386374e@126.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6704ed4e.050a0220.1e4d62.0086.GAE@google.com> Subject: Re: [syzbot] [bcachefs?] UBSAN: shift-out-of-bounds in bch2_stripe_to_text From: syzbot To: kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, zhaomzhao@126.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: UBSAN: shift-out-of-bounds in bch2_stripe_to_text bcachefs (loop0): Doing compatible version upgrade from 1.7: mi_btree_bitmap to 1.12: rebalance_work_acct_fix running recovery passes: check_allocations ------------[ cut here ]------------ UBSAN: shift-out-of-bounds in fs/bcachefs/ec.c:147:2 shift exponent 108 is too large for 32-bit type 'unsigned int' CPU: 0 UID: 0 PID: 5588 Comm: syz.0.15 Not tainted 6.11.0-syzkaller-08068-g1ec6d097897a-dirty #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:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_shift_out_of_bounds+0x3c8/0x420 lib/ubsan.c:468 bch2_stripe_to_text+0x899/0x8c0 fs/bcachefs/ec.c:147 __bch2_bkey_fsck_err+0x11f/0x230 fs/bcachefs/error.c:429 bch2_stripe_validate+0x3ca/0x630 fs/bcachefs/ec.c:116 bch2_btree_node_read_done+0x3dc6/0x5d60 fs/bcachefs/btree_io.c:1219 btree_node_read_work+0x68b/0x1260 fs/bcachefs/btree_io.c:1323 bch2_btree_node_read+0x2433/0x2a10 __bch2_btree_root_read fs/bcachefs/btree_io.c:1749 [inline] bch2_btree_root_read+0x626/0x980 fs/bcachefs/btree_io.c:1773 read_btree_roots+0x296/0x840 fs/bcachefs/recovery.c:523 bch2_fs_recovery+0x24ac/0x38b0 fs/bcachefs/recovery.c:851 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1036 bch2_fs_get_tree+0xd61/0x1700 fs/bcachefs/fs.c:1956 vfs_get_tree+0x90/0x2b0 fs/super.c:1800 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4055 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032 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: 0033:0x7f862b97f69a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f862c6a0e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f862c6a0ef0 RCX: 00007f862b97f69a RDX: 0000000020005d80 RSI: 0000000020005dc0 RDI: 00007f862c6a0eb0 RBP: 0000000020005d80 R08: 00007f862c6a0ef0 R09: 0000000000200400 R10: 0000000000200400 R11: 0000000000000246 R12: 0000000020005dc0 R13: 00007f862c6a0eb0 R14: 0000000000005da0 R15: 0000000020000340 ---[ end trace ]--- Tested on: commit: 1ec6d097 Merge tag 's390-6.12-1' of git://git.kernel.o.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=132dbb80580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6265dd30e362bb47 dashboard link: https://syzkaller.appspot.com/bug?extid=f8c98a50c323635be65d compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied.