loop0: detected capacity change from 0 to 32768 ====================================================== WARNING: possible circular locking dependency detected 6.9.0-syzkaller-05151-g1b294a1f3561 #0 Not tainted ------------------------------------------------------ syz-executor.0/9817 is trying to acquire lock: ffffffff8db39b80 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:312 [inline] ffffffff8db39b80 (fs_reclaim){+.+.}-{0:0}, at: prepare_alloc_pages.constprop.0+0x155/0x560 mm/page_alloc.c:4346 but task is already holding lock: ffff888029d9a638 (&jfs_ip->rdwrlock/1){++++}-{3:3}, at: jfs_mount_rw+0x1eb/0x700 fs/jfs/jfs_mount.c:238 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&jfs_ip->rdwrlock/1){++++}-{3:3}: down_read_nested+0x9e/0x330 kernel/locking/rwsem.c:1651 diFree+0x31c/0x2770 fs/jfs/jfs_imap.c:891 jfs_evict_inode+0x3d4/0x4b0 fs/jfs/inode.c:156 evict+0x2ed/0x6c0 fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 dentry_unlink_inode+0x295/0x440 fs/dcache.c:400 __dentry_kill+0x1d0/0x600 fs/dcache.c:603 shrink_kill fs/dcache.c:1048 [inline] shrink_dentry_list+0x140/0x5d0 fs/dcache.c:1075 shrink_dcache_parent+0xe2/0x530 fs/dcache.c:1509 do_one_tree fs/dcache.c:1538 [inline] shrink_dcache_for_umount+0x79/0x390 fs/dcache.c:1555 generic_shutdown_super+0x76/0x3d0 fs/super.c:619 kill_block_super+0x3b/0x90 fs/super.c:1675 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472 deactivate_super+0xde/0x100 fs/super.c:505 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 __do_fast_syscall_32+0x82/0x120 arch/x86/entry/common.c:389 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e -> #1 (&(imap->im_aglock[index])){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 diFree+0x2ff/0x2770 fs/jfs/jfs_imap.c:886 jfs_evict_inode+0x3d4/0x4b0 fs/jfs/inode.c:156 evict+0x2ed/0x6c0 fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 dentry_unlink_inode+0x295/0x440 fs/dcache.c:400 __dentry_kill+0x1d0/0x600 fs/dcache.c:603 shrink_kill fs/dcache.c:1048 [inline] shrink_dentry_list+0x140/0x5d0 fs/dcache.c:1075 prune_dcache_sb+0xeb/0x150 fs/dcache.c:1156 super_cache_scan+0x32a/0x550 fs/super.c:221 do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435 shrink_slab_memcg mm/shrinker.c:548 [inline] shrink_slab+0xa87/0x1310 mm/shrinker.c:626 shrink_one+0x493/0x7c0 mm/vmscan.c:4774 shrink_many mm/vmscan.c:4835 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4935 shrink_node mm/vmscan.c:5894 [inline] kswapd_shrink_node mm/vmscan.c:6704 [inline] balance_pgdat+0x10d1/0x1a10 mm/vmscan.c:6895 kswapd+0x5ea/0xbf0 mm/vmscan.c:7164 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #0 (fs_reclaim){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __fs_reclaim_acquire mm/page_alloc.c:3698 [inline] fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3712 might_alloc include/linux/sched/mm.h:312 [inline] prepare_alloc_pages.constprop.0+0x155/0x560 mm/page_alloc.c:4346 __alloc_pages+0x194/0x2460 mm/page_alloc.c:4564 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] __kmalloc_large_node+0x7f/0x1a0 mm/slub.c:3984 kmalloc_large+0x1c/0x70 mm/slub.c:4001 kmalloc include/linux/slab.h:625 [inline] diMount+0x29/0x8d0 fs/jfs/jfs_imap.c:105 jfs_mount_rw+0x238/0x700 fs/jfs/jfs_mount.c:240 jfs_remount+0x51f/0x650 fs/jfs/super.c:454 legacy_reconfigure+0x119/0x180 fs/fs_context.c:685 reconfigure_super+0x44f/0xb20 fs/super.c:1071 do_remount fs/namespace.c:2892 [inline] path_mount+0x1735/0x1f10 fs/namespace.c:3671 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __ia32_sys_mount+0x295/0x320 fs/namespace.c:3875 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e other info that might help us debug this: Chain exists of: fs_reclaim --> &(imap->im_aglock[index]) --> &jfs_ip->rdwrlock/1 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&jfs_ip->rdwrlock/1); lock(&(imap->im_aglock[index])); lock(&jfs_ip->rdwrlock/1); lock(fs_reclaim); *** DEADLOCK *** 2 locks held by syz-executor.0/9817: #0: ffff888057daa0e0 (&type->s_umount_key#88){++++}-{3:3}, at: do_remount fs/namespace.c:2889 [inline] #0: ffff888057daa0e0 (&type->s_umount_key#88){++++}-{3:3}, at: path_mount+0x150e/0x1f10 fs/namespace.c:3671 #1: ffff888029d9a638 (&jfs_ip->rdwrlock/1){++++}-{3:3}, at: jfs_mount_rw+0x1eb/0x700 fs/jfs/jfs_mount.c:238 stack backtrace: CPU: 3 PID: 9817 Comm: syz-executor.0 Not tainted 6.9.0-syzkaller-05151-g1b294a1f3561 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __fs_reclaim_acquire mm/page_alloc.c:3698 [inline] fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3712 might_alloc include/linux/sched/mm.h:312 [inline] prepare_alloc_pages.constprop.0+0x155/0x560 mm/page_alloc.c:4346 __alloc_pages+0x194/0x2460 mm/page_alloc.c:4564 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] __kmalloc_large_node+0x7f/0x1a0 mm/slub.c:3984 kmalloc_large+0x1c/0x70 mm/slub.c:4001 kmalloc include/linux/slab.h:625 [inline] diMount+0x29/0x8d0 fs/jfs/jfs_imap.c:105 jfs_mount_rw+0x238/0x700 fs/jfs/jfs_mount.c:240 jfs_remount+0x51f/0x650 fs/jfs/super.c:454 legacy_reconfigure+0x119/0x180 fs/fs_context.c:685 reconfigure_super+0x44f/0xb20 fs/super.c:1071 do_remount fs/namespace.c:2892 [inline] path_mount+0x1735/0x1f10 fs/namespace.c:3671 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __ia32_sys_mount+0x295/0x320 fs/namespace.c:3875 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7278579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5e6a400 EFLAGS: 00000292 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020000f00 RDX: 0000000020000f40 RSI: 0000000001a4a438 RDI: 00000000f5e6a4a0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 syz-executor.0: attempt to access beyond end of device loop14: rw=0, sector=8, nr_sectors = 8 limit=0 lbmIODone: I/O error in JFS log *** Log Format Error ! *** lmLogInit: exit(-22) lmLogOpen: exit(-22) ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi