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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, kernel test robot noticed "WARNING:possible_circular_locking_dependency_detected" on: commit: 99848157f71c03ca5e975b0e686def1d66e8b19f ("maple_tree: Sheaf conversion") https://git.kernel.org/cgit/linux/kernel/git/vbabka/linux.git slub-percpu-sheaves-v6r2 in testcase: rcuscale version: with following parameters: runtime: 300s scale_type: rcu config: x86_64-randconfig-075-20250831 compiler: gcc-12 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202509041248.b7ece14a-lkp@intel.com [ 17.413963][ T74] WARNING: possible circular locking dependency detected [ 17.414491][ T74] 6.17.0-rc3-00017-g99848157f71c #1 Not tainted [ 17.414936][ T74] ------------------------------------------------------ [ 17.415483][ T74] systemd-cryptse/74 is trying to acquire lock: [ 17.415965][ T74] ffffffffb02789c0 (fs_reclaim){+.+.}-{0:0}, at: prepare_alloc_pages+0xd5/0x23d [ 17.416782][ T74] [ 17.416782][ T74] but task is already holding lock: [ 17.417298][ T74] ffff88812925dbf8 (&mapping->i_mmap_rwsem){++++}-{4:4}, at: vma_prepare (mm/vma.c:296) [ 17.418021][ T74] [ 17.418021][ T74] which lock already depends on the new lock. [ 17.418021][ T74] [ 17.418779][ T74] [ 17.418779][ T74] the existing dependency chain (in reverse order) is: [ 17.419530][ T74] [ 17.419530][ T74] -> #1 (&mapping->i_mmap_rwsem){++++}-{4:4}: [ 17.420152][ T74] validate_chain (kernel/locking/lockdep.c:3285 kernel/locking/lockdep.c:3908) [ 17.420562][ T74] __lock_acquire (kernel/locking/lockdep.c:5237) [ 17.420968][ T74] lock_acquire (kernel/locking/lockdep.c:470 kernel/locking/lockdep.c:5870) [ 17.421364][ T74] down_write (kernel/locking/rwsem.c:1315 kernel/locking/rwsem.c:1326 kernel/locking/rwsem.c:1591) [ 17.421735][ T74] dma_resv_lockdep (include/linux/fs.h:557 drivers/dma-buf/dma-resv.c:798) [ 17.422159][ T74] do_one_initcall (init/main.c:1269) [ 17.422573][ T74] do_initcalls (init/main.c:1330 init/main.c:1347) [ 17.423031][ T74] kernel_init_freeable (init/main.c:1583) [ 17.423481][ T74] kernel_init (init/main.c:1471) [ 17.423840][ T74] ret_from_fork (arch/x86/kernel/process.c:154) [ 17.424211][ T74] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) [ 17.424612][ T74] [ 17.424612][ T74] -> #0 (fs_reclaim){+.+.}-{0:0}: [ 17.425162][ T74] check_noncircular (kernel/locking/lockdep.c:2179) [ 17.425561][ T74] check_prev_add (kernel/locking/lockdep.c:3166) [ 17.425954][ T74] validate_chain (kernel/locking/lockdep.c:3285 kernel/locking/lockdep.c:3908) [ 17.426681][ T74] __lock_acquire (kernel/locking/lockdep.c:5237) [ 17.427085][ T74] lock_acquire (kernel/locking/lockdep.c:470 kernel/locking/lockdep.c:5870) [ 17.427458][ T74] __fs_reclaim_acquire (mm/page_alloc.c:4235) [ 17.427840][ T74] prepare_alloc_pages+0xd5/0x23d [ 17.428255][ T74] __alloc_frozen_pages_noprof (mm/page_alloc.c:5137) [ 17.428658][ T74] alloc_slab_page (mm/slub.c:2990) [ 17.428987][ T74] allocate_slab (mm/slub.c:3155) [ 17.429316][ T74] ___slab_alloc (mm/slub.c:4406 (discriminator 3)) [ 17.429757][ T74] __kmem_cache_alloc_bulk (mm/slub.c:6757) [ 17.430188][ T74] refill_sheaf (mm/slub.c:2571) [ 17.430554][ T74] kmem_cache_return_sheaf (mm/slub.c:5174 (discriminator 1)) [ 17.430998][ T74] mas_destroy (lib/maple_tree.c:5384) [ 17.431366][ T74] mas_store_prealloc (lib/maple_tree.c:5292 (discriminator 4)) [ 17.431789][ T74] commit_merge (mm/vma.c:767) [ 17.432172][ T74] vma_expand (mm/vma.c:1158) [ 17.432530][ T74] vma_merge_new_range (mm/vma.c:1095 (discriminator 1)) [ 17.433237][ T74] __mmap_region (mm/vma.c:2664) [ 17.433621][ T74] mmap_region (mm/vma.c:2739) [ 17.433987][ T74] do_mmap (mm/mmap.c:559) [ 17.434342][ T74] vm_mmap_pgoff (mm/util.c:582) [ 17.434736][ T74] ksys_mmap_pgoff (mm/mmap.c:606) [ 17.435128][ T74] do_int80_emulation (arch/x86/entry/syscall_32.c:83 arch/x86/entry/syscall_32.c:172) [ 17.435557][ T74] asm_int80_emulation (arch/x86/include/asm/idtentry.h:626) [ 17.436031][ T74] [ 17.436031][ T74] other info that might help us debug this: [ 17.436031][ T74] [ 17.436803][ T74] Possible unsafe locking scenario: [ 17.436803][ T74] [ 17.437381][ T74] CPU0 CPU1 [ 17.437800][ T74] ---- ---- [ 17.438213][ T74] lock(&mapping->i_mmap_rwsem); [ 17.438614][ T74] lock(fs_reclaim); [ 17.439118][ T74] lock(&mapping->i_mmap_rwsem); [ 17.439737][ T74] lock(fs_reclaim); [ 17.440045][ T74] [ 17.440045][ T74] *** DEADLOCK *** [ 17.440045][ T74] [ 17.440668][ T74] 2 locks held by systemd-cryptse/74: [ 17.441085][ T74] #0: ffff88813b6a9d48 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff (include/linux/mmap_lock.h:415 mm/util.c:578) [ 17.441777][ T74] #1: ffff88812925dbf8 (&mapping->i_mmap_rwsem){++++}-{4:4}, at: vma_prepare (mm/vma.c:296) [ 17.442517][ T74] [ 17.442517][ T74] stack backtrace: [ 17.443019][ T74] CPU: 0 UID: 0 PID: 74 Comm: systemd-cryptse Not tainted 6.17.0-rc3-00017-g99848157f71c #1 PREEMPT(full) [ 17.443875][ T74] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 17.444619][ T74] Call Trace: [ 17.444877][ T74] [ 17.445101][ T74] print_circular_bug (kernel/locking/lockdep.c:2046) [ 17.445469][ T74] check_noncircular (kernel/locking/lockdep.c:2179) [ 17.445823][ T74] ? add_chain_block (kernel/locking/lockdep.c:3442) [ 17.446245][ T74] check_prev_add (kernel/locking/lockdep.c:3166) [ 17.446608][ T74] validate_chain (kernel/locking/lockdep.c:3285 kernel/locking/lockdep.c:3908) [ 17.446960][ T74] __lock_acquire (kernel/locking/lockdep.c:5237) [ 17.447332][ T74] ? prepare_alloc_pages+0xd5/0x23d [ 17.447831][ T74] lock_acquire (kernel/locking/lockdep.c:470 kernel/locking/lockdep.c:5870) [ 17.448188][ T74] ? prepare_alloc_pages+0xd5/0x23d [ 17.448649][ T74] ? lookup_chain_cache (kernel/locking/lockdep.c:3801 (discriminator 1)) [ 17.449018][ T74] __fs_reclaim_acquire (mm/page_alloc.c:4235) [ 17.449456][ T74] ? prepare_alloc_pages+0xd5/0x23d [ 17.449923][ T74] prepare_alloc_pages+0xd5/0x23d [ 17.450400][ T74] __alloc_frozen_pages_noprof (mm/page_alloc.c:5137) [ 17.450855][ T74] ? __alloc_pages_slowpath+0xa4d/0xa4d [ 17.451376][ T74] ? lock_is_held_type (kernel/locking/lockdep.c:5601 kernel/locking/lockdep.c:5940) [ 17.451778][ T74] ? find_held_lock (kernel/locking/lockdep.c:5350) [ 17.452142][ T74] ? mark_lock (kernel/locking/lockdep.c:4731 (discriminator 3)) [ 17.452492][ T74] alloc_slab_page (mm/slub.c:2990) [ 17.452912][ T74] allocate_slab (mm/slub.c:3155) [ 17.453271][ T74] ___slab_alloc (mm/slub.c:4406 (discriminator 3)) [ 17.453601][ T74] ? lock_acquire (kernel/locking/lockdep.c:470 kernel/locking/lockdep.c:5870) [ 17.453949][ T74] ? refill_sheaf (mm/slub.c:2571) [ 17.454278][ T74] ? mark_lock (kernel/locking/lockdep.c:4731 (discriminator 3)) [ 17.454611][ T74] ? mark_held_locks (kernel/locking/lockdep.c:4325) [ 17.454987][ T74] __kmem_cache_alloc_bulk (mm/slub.c:6757) [ 17.455387][ T74] refill_sheaf (mm/slub.c:2571) [ 17.455731][ T74] kmem_cache_return_sheaf (mm/slub.c:5174 (discriminator 1)) [ 17.456221][ T74] mas_destroy (lib/maple_tree.c:5384) [ 17.456575][ T74] mas_store_prealloc (lib/maple_tree.c:5292 (discriminator 4)) [ 17.456968][ T74] ? mas_store (lib/maple_tree.c:5292) [ 17.457303][ T74] ? __mas_set_range (include/linux/maple_tree.h:755 (discriminator 20)) [ 17.457685][ T74] commit_merge (mm/vma.c:767) [ 17.458038][ T74] ? vma_complete (mm/vma.c:731) [ 17.458384][ T74] ? lock_is_held_type (kernel/locking/lockdep.c:5601 kernel/locking/lockdep.c:5940) [ 17.458757][ T74] vma_expand (mm/vma.c:1158) [ 17.459090][ T74] ? unmap_region (mm/vma.c:1121) [ 17.459519][ T74] ? can_vma_merge_right (mm/vma.c:197 mm/vma.c:440) [ 17.459890][ T74] vma_merge_new_range (mm/vma.c:1095 (discriminator 1)) [ 17.460253][ T74] __mmap_region (mm/vma.c:2664) [ 17.460604][ T74] ? __mmap_new_vma (mm/vma.c:2641) [ 17.460977][ T74] ? inc_stack_record_count (include/linux/refcount.h:290 include/linux/refcount.h:312 mm/page_owner.c:216) [ 17.461414][ T74] ? lock_is_held_type (kernel/locking/lockdep.c:5601 kernel/locking/lockdep.c:5940) [ 17.461808][ T74] ? mas_prev_slot (lib/maple_tree.c:4369) [ 17.462190][ T74] ? mas_prev_slot (lib/maple_tree.c:5664) [ 17.462586][ T74] ? lock_is_held_type (kernel/locking/lockdep.c:5601 kernel/locking/lockdep.c:5940) [ 17.463001][ T74] mmap_region (mm/vma.c:2739) [ 17.463353][ T74] ? generic_file_readonly_mmap (mm/filemap.c:3852) [ 17.463779][ T74] do_mmap (mm/mmap.c:559) [ 17.464082][ T74] ? __get_unmapped_area (mm/mmap.c:339) [ 17.464468][ T74] ? tracer_preempt_on (kernel/trace/trace_irqsoff.c:689) [ 17.464878][ T74] vm_mmap_pgoff (mm/util.c:582) [ 17.465244][ T74] ? randomize_page (mm/util.c:568) [ 17.465615][ T74] ksys_mmap_pgoff (mm/mmap.c:606) [ 17.466035][ T74] do_int80_emulation (arch/x86/entry/syscall_32.c:83 arch/x86/entry/syscall_32.c:172) [ 17.466429][ T74] asm_int80_emulation (arch/x86/include/asm/idtentry.h:626) [ 17.466827][ T74] RIP: 0023:0xf7f95cb0 [ 17.467133][ T74] Code: 4c 24 34 89 44 24 0c 8b 44 24 44 8b 54 24 38 8b 74 24 3c 8b 7c 24 40 a9 ff 0f 00 00 75 1c c1 e8 0c 89 c5 b8 c0 00 00 00 cd 80 <3d> 00 f0 ff ff 77 21 83 c4 1c 5b 5e 5f 5d c3 90 83 c4 1c b8 ea ff All code ======== 0: 4c 24 34 rex.WR and $0x34,%al 3: 89 44 24 0c mov %eax,0xc(%rsp) 7: 8b 44 24 44 mov 0x44(%rsp),%eax b: 8b 54 24 38 mov 0x38(%rsp),%edx f: 8b 74 24 3c mov 0x3c(%rsp),%esi 13: 8b 7c 24 40 mov 0x40(%rsp),%edi 17: a9 ff 0f 00 00 test $0xfff,%eax 1c: 75 1c jne 0x3a 1e: c1 e8 0c shr $0xc,%eax 21: 89 c5 mov %eax,%ebp 23: b8 c0 00 00 00 mov $0xc0,%eax 28: cd 80 int $0x80 2a:* 3d 00 f0 ff ff cmp $0xfffff000,%eax <-- trapping instruction 2f: 77 21 ja 0x52 The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250904/202509041248.b7ece14a-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki