Hello, syzbot found the following issue on: HEAD commit: 32f88d65f01b Merge tag 'linux_kselftest-fixes-6.10-rc3' of.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=105806bc980000 kernel config: https://syzkaller.appspot.com/x/.config?x=6a1d4156cdd1d8e2 dashboard link: https://syzkaller.appspot.com/bug?extid=9316d51d9d379787e4ad compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-32f88d65.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4330b2cd167b/vmlinux-32f88d65.xz kernel image: https://storage.googleapis.com/syzbot-assets/961415fd7b0b/bzImage-32f88d65.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9316d51d9d379787e4ad@xxxxxxxxxxxxxxxxxxxxxxxxx loop3: detected capacity change from 0 to 1024 ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(l->owner) WARNING: CPU: 3 PID: 7049 at include/linux/local_lock_internal.h:30 local_lock_acquire include/linux/local_lock_internal.h:30 [inline] WARNING: CPU: 3 PID: 7049 at include/linux/local_lock_internal.h:30 ___slab_alloc+0x16c2/0x1870 mm/slub.c:3715 Modules linked in: CPU: 3 PID: 7049 Comm: syz-executor.3 Not tainted 6.10.0-rc2-syzkaller-00022-g32f88d65f01b #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:local_lock_acquire include/linux/local_lock_internal.h:30 [inline] RIP: 0010:___slab_alloc+0x16c2/0x1870 mm/slub.c:3715 Code: a0 02 85 c0 74 09 83 3d 0f f3 04 0e 00 74 21 90 e9 30 ff ff ff 90 48 c7 c6 ff 20 3b 8d 48 c7 c7 28 ec 3a 8d e8 0f 5a 70 ff 90 <0f> 0b 90 90 eb c6 90 48 c7 c6 08 21 3b 8d 48 c7 c7 28 ec 3a 8d e8 RSP: 0018:ffffc9000394f830 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000246 RCX: ffffc90003db1000 RDX: 0000000000040000 RSI: ffffffff81500016 RDI: 0000000000000001 RBP: ffffc9000394f910 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 000000002d2d2d2d R12: ffff888024f90000 R13: ffff88804aaa4dc0 R14: ffffe8fefd34e860 R15: ffffe8fefd34e840 FS: 00007fe0ca3416c0(0000) GS:ffff88806b300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c42d000 CR3: 000000001ebea000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3756 __slab_alloc_node mm/slub.c:3809 [inline] slab_alloc_node mm/slub.c:3988 [inline] kmem_cache_alloc_noprof+0x2a7/0x2f0 mm/slub.c:4007 ext4_mb_add_groupinfo+0x445/0x1180 fs/ext4/mballoc.c:3355 ext4_mb_init_backend fs/ext4/mballoc.c:3434 [inline] ext4_mb_init+0x127a/0x2530 fs/ext4/mballoc.c:3732 __ext4_fill_super fs/ext4/super.c:5501 [inline] ext4_fill_super+0x6d4f/0xace0 fs/ext4/super.c:5676 get_tree_bdev+0x36f/0x610 fs/super.c:1615 vfs_get_tree+0x8f/0x380 fs/super.c:1780 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x297/0x320 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe0c967e5ea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe0ca340ef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fe0ca340f80 RCX: 00007fe0c967e5ea RDX: 0000000020000040 RSI: 0000000020000200 RDI: 00007fe0ca340f40 RBP: 0000000020000040 R08: 00007fe0ca340f80 R09: 0000000000200000 R10: 0000000000200000 R11: 0000000000000202 R12: 0000000020000200 R13: 00007fe0ca340f40 R14: 000000000000057c R15: 0000000020000180 </TASK> --- 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@xxxxxxxxxxxxxxxx. 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 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
