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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 "BUG_kmalloc-#(Not_tainted):Freepointer_corrupt" on: commit: af92793e52c3a99b828ed4bdd277fd3e11c18d08 ("slab: Introduce kmalloc_nolock() and kfree_nolock().") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [test failed on linus/master ec714e371f22f716a04e6ecb2a24988c92b26911] [test failed on linux-next/master 0b2f041c47acb45db82b4e847af6e17eb66cd32d] [test failed on fix commit 83d59d81b20c09c256099d1c15d7da21969581bd] in testcase: trinity version: trinity-i386-abe9de86-1_20230429 with following parameters: runtime: 300s group: group-01 nr_groups: 5 config: i386-randconfig-012-20251004 compiler: gcc-14 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/202510101652.7921fdc6-lkp@intel.com [ 66.142496][ C0] ============================================================================= [ 66.146355][ C0] BUG kmalloc-96 (Not tainted): Freepointer corrupt [ 66.147370][ C0] ----------------------------------------------------------------------------- [ 66.147370][ C0] [ 66.149155][ C0] Allocated in alloc_slab_obj_exts+0x33c/0x460 age=7 cpu=0 pid=3651 [ 66.150496][ C0] kmalloc_nolock_noprof (mm/slub.c:4798 mm/slub.c:5658) [ 66.151371][ C0] alloc_slab_obj_exts (mm/slub.c:2102 (discriminator 3)) [ 66.152250][ C0] __alloc_tagging_slab_alloc_hook (mm/slub.c:2208 (discriminator 1) mm/slub.c:2224 (discriminator 1)) [ 66.153248][ C0] __kmalloc_cache_noprof (mm/slub.c:5698) [ 66.154093][ C0] set_mm_walk (include/linux/slab.h:953 include/linux/slab.h:1090 mm/vmscan.c:3852) [ 66.154810][ C0] try_to_inc_max_seq (mm/vmscan.c:4077) [ 66.155627][ C0] try_to_shrink_lruvec (mm/vmscan.c:4860 mm/vmscan.c:4903) [ 66.156512][ C0] shrink_node (mm/vmscan.c:4952 mm/vmscan.c:5091 mm/vmscan.c:6078) [ 66.157363][ C0] do_try_to_free_pages (mm/vmscan.c:6336 mm/vmscan.c:6398) [ 66.158233][ C0] try_to_free_pages (mm/vmscan.c:6644) [ 66.159023][ C0] __alloc_pages_slowpath+0x28b/0x6e0 [ 66.159977][ C0] __alloc_frozen_pages_noprof (mm/page_alloc.c:5161) [ 66.160941][ C0] __folio_alloc_noprof (mm/page_alloc.c:5183 mm/page_alloc.c:5192) [ 66.161739][ C0] shmem_alloc_and_add_folio+0x40/0x200 [ 66.162752][ C0] shmem_get_folio_gfp+0x30b/0x880 [ 66.163649][ C0] shmem_fallocate (mm/shmem.c:3813) [ 66.164498][ C0] Freed in kmem_cache_free_bulk+0x1b/0x50 age=89 cpu=1 pid=248 [ 66.169568][ C0] kmem_cache_free_bulk (mm/slub.c:4875 (discriminator 3) mm/slub.c:5197 (discriminator 3) mm/slub.c:5228 (discriminator 3)) [ 66.170518][ C0] kmem_cache_free_bulk (mm/slub.c:7226) [ 66.171368][ C0] kvfree_rcu_bulk (include/linux/slab.h:827 mm/slab_common.c:1522) [ 66.172133][ C0] kfree_rcu_monitor (mm/slab_common.c:1728 (discriminator 3) mm/slab_common.c:1802 (discriminator 3)) [ 66.173002][ C0] kfree_rcu_shrink_scan (mm/slab_common.c:2155) [ 66.173852][ C0] do_shrink_slab (mm/shrinker.c:438) [ 66.174640][ C0] shrink_slab (mm/shrinker.c:665) [ 66.175446][ C0] shrink_node (mm/vmscan.c:338 (discriminator 1) mm/vmscan.c:4960 (discriminator 1) mm/vmscan.c:5091 (discriminator 1) mm/vmscan.c:6078 (discriminator 1)) [ 66.176205][ C0] do_try_to_free_pages (mm/vmscan.c:6336 mm/vmscan.c:6398) [ 66.177017][ C0] try_to_free_pages (mm/vmscan.c:6644) [ 66.177808][ C0] __alloc_pages_slowpath+0x28b/0x6e0 [ 66.178851][ C0] __alloc_frozen_pages_noprof (mm/page_alloc.c:5161) [ 66.179753][ C0] __folio_alloc_noprof (mm/page_alloc.c:5183 mm/page_alloc.c:5192) [ 66.180583][ C0] folio_prealloc+0x36/0x160 [ 66.181430][ C0] do_anonymous_page (mm/memory.c:4997 mm/memory.c:5054) [ 66.182288][ C0] do_pte_missing (mm/memory.c:4232) [ 66.183062][ C0] Slab 0xe41bfb28 objects=21 used=17 fp=0xedf89320 flags=0x40000200(workingset|zone=1) [ 66.184609][ C0] Object 0xedf89b60 @offset=2912 fp=0xeac7a8b4 [ 66.184609][ C0] [ 66.185960][ C0] Redzone edf89b40: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc ................ [ 66.187388][ C0] Redzone edf89b50: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc ................ [ 66.189695][ C0] Object edf89b60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 66.191175][ C0] Object edf89b70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 66.192701][ C0] Object edf89b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 66.194259][ C0] Object edf89b90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 66.195753][ C0] Object edf89ba0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 66.196836][ T248] sed invoked oom-killer: gfp_mask=0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO|__GFP_COMP), order=0, oom_score_adj=-1000 [ 66.197239][ C0] Object edf89bb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [ 66.197395][ C0] Redzone edf89bc0: cc cc cc cc .... [ 66.197402][ C0] Padding edf89bf4: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZ [ 66.197406][ C0] Disabling lock debugging due to kernel taint [ 66.203107][ T248] CPU: 1 UID: 0 PID: 248 Comm: sed Not tainted 6.17.0-rc3-00014-gaf92793e52c3 #1 PREEMPTLAZY 2cffa6c1ad8b595a5f5738a3e143d70494d8da79 [ 66.203119][ T248] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 66.203122][ T248] Call Trace: [ 66.203125][ T248] ? show_stack (arch/x86/kernel/dumpstack.c:319) [ 66.203139][ T248] dump_stack_lvl (lib/dump_stack.c:122) [ 66.203148][ T248] dump_stack (lib/dump_stack.c:130) [ 66.203153][ T248] dump_header (mm/oom_kill.c:468 (discriminator 1)) [ 66.203165][ T248] oom_kill_process.cold (mm/oom_kill.c:450 (discriminator 1) mm/oom_kill.c:1041 (discriminator 1)) [ 66.203174][ T248] out_of_memory (mm/oom_kill.c:1180) [ 66.203184][ T248] __alloc_pages_may_oom (mm/page_alloc.c:4026) [ 66.203199][ T248] __alloc_pages_slowpath+0x39d/0x6e0 [ 66.203210][ T248] __alloc_frozen_pages_noprof (mm/page_alloc.c:5161) [ 66.203221][ T248] __folio_alloc_noprof (mm/page_alloc.c:5183 mm/page_alloc.c:5192) [ 66.203227][ T248] folio_prealloc+0x36/0x160 [ 66.203234][ T248] do_anonymous_page (mm/memory.c:4997 mm/memory.c:5054) [ 66.203239][ T248] ? handle_pte_fault (include/linux/rcupdate.h:341 include/linux/rcupdate.h:871 include/linux/pgtable.h:136 mm/memory.c:6046) [ 66.203244][ T248] ? handle_pte_fault (include/linux/spinlock.h:391 mm/memory.c:6092) [ 66.203249][ T248] ? rcu_is_watching (kernel/rcu/tree.c:752 (discriminator 4)) [ 66.203256][ T248] do_pte_missing (mm/memory.c:4232) [ 66.203260][ T248] ? handle_pte_fault (arch/x86/include/asm/preempt.h:104 (discriminator 1) include/linux/rcupdate.h:100 (discriminator 1) include/linux/rcupdate.h:873 (discriminator 1) include/linux/pgtable.h:136 (discriminator 1) mm/memory.c:6046 (discriminator 1)) [ 66.203267][ T248] handle_pte_fault (mm/memory.c:6052) [ 66.203275][ T248] handle_mm_fault (mm/memory.c:6195 mm/memory.c:6364) [ 66.203289][ T248] do_user_addr_fault (include/linux/sched/signal.h:423 (discriminator 1) arch/x86/mm/fault.c:1389 (discriminator 1)) [ 66.203301][ T248] exc_page_fault (arch/x86/include/asm/irqflags.h:26 arch/x86/include/asm/irqflags.h:109 arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) [ 66.203310][ T248] ? pvclock_clocksource_read_nowd (arch/x86/mm/fault.c:1489) [ 66.203316][ T248] handle_exception (arch/x86/entry/entry_32.S:1055) [ 66.203319][ T248] EIP: 0xb7d730cf [ 66.203325][ T248] Code: 8d 04 33 8d 92 40 07 00 00 89 45 38 39 d5 ba 00 00 00 00 0f 44 fa 83 c9 01 09 f7 89 fa 8d 7b 08 83 ca 01 89 53 04 8b 54 24 04 <89> 48 04 89 f8 e8 a7 cb ff ff e9 93 f7 ff ff 8b 44 24 08 8b 74 24 All code ======== 0: 8d 04 33 lea (%rbx,%rsi,1),%eax 3: 8d 92 40 07 00 00 lea 0x740(%rdx),%edx 9: 89 45 38 mov %eax,0x38(%rbp) c: 39 d5 cmp %edx,%ebp e: ba 00 00 00 00 mov $0x0,%edx 13: 0f 44 fa cmove %edx,%edi 16: 83 c9 01 or $0x1,%ecx 19: 09 f7 or %esi,%edi 1b: 89 fa mov %edi,%edx 1d: 8d 7b 08 lea 0x8(%rbx),%edi 20: 83 ca 01 or $0x1,%edx 23: 89 53 04 mov %edx,0x4(%rbx) 26: 8b 54 24 04 mov 0x4(%rsp),%edx 2a:* 89 48 04 mov %ecx,0x4(%rax) <-- trapping instruction 2d: 89 f8 mov %edi,%eax 2f: e8 a7 cb ff ff call 0xffffffffffffcbdb 34: e9 93 f7 ff ff jmp 0xfffffffffffff7cc 39: 8b 44 24 08 mov 0x8(%rsp),%eax 3d: 8b .byte 0x8b 3e: 74 24 je 0x64 Code starting with the faulting instruction =========================================== 0: 89 48 04 mov %ecx,0x4(%rax) 3: 89 f8 mov %edi,%eax 5: e8 a7 cb ff ff call 0xffffffffffffcbb1 a: e9 93 f7 ff ff jmp 0xfffffffffffff7a2 f: 8b 44 24 08 mov 0x8(%rsp),%eax 13: 8b .byte 0x8b 14: 74 24 je 0x3a The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20251010/202510101652.7921fdc6-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki