[ 46.115042] BUG: Bad rss-counter state mm:00000000cd58e964 type:MM_FILEPAGES val:33 [ 46.116613] BUG: Bad rss-counter state mm:00000000cd58e964 type:MM_ANONPAGES val:22 [ 46.287118] ================================================================== [ 46.288058] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.289004] Read of size 8 at addr ffff8880147fb880 by task sshd/218 [ 46.289763] [ 46.289986] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.290957] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.291936] Call Trace: [ 46.292271] [ 46.292578] dump_stack_lvl+0x91/0xf0 [ 46.293070] print_report+0xcc/0x620 [ 46.293559] ? __virt_addr_valid+0x102/0x340 [ 46.294112] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.294731] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.295350] kasan_report+0xbe/0xf0 [ 46.295824] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.296461] vma_interval_tree_remove+0xc75/0xec0 [ 46.297074] vma_prepare+0xc54/0x11a0 [ 46.297559] __split_vma+0x5af/0x950 [ 46.298034] ? __pfx___split_vma+0x10/0x10 [ 46.298563] ? find_held_lock+0x2c/0x110 [ 46.299091] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.299666] ? lock_is_held_type+0x9f/0x120 [ 46.300237] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.300852] ? mtree_range_walk+0x632/0x900 [ 46.301411] ? mas_walk+0x5c7/0x7c0 [ 46.301890] do_vmi_munmap+0x1f1/0x2b0 [ 46.302384] mmap_region+0x1f9/0x2660 [ 46.302867] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.303382] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.304109] ? __pfx_lock_acquire+0x10/0x10 [ 46.304648] ? __pfx_mmap_region+0x10/0x10 [ 46.305183] ? security_mmap_addr+0x7d/0xa0 [ 46.305718] ? get_unmapped_area+0x1f5/0x3f0 [ 46.306274] do_mmap+0x854/0xf00 [ 46.306714] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.307210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.307772] ksys_mmap_pgoff+0x3af/0x500 [ 46.308292] do_syscall_64+0x3f/0x90 [ 46.308775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.309424] RIP: 0033:0x7fe04a715d82 [ 46.309879] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 46.312058] RSP: 002b:00007ffcd4abc358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.312963] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe04a715d82 [ 46.313810] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe049b4f000 [ 46.314668] RBP: 00007fe049b4f000 R08: 0000000000000009 R09: 0000000000001000 [ 46.315543] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6d5859ec0 [ 46.316386] R13: 00007ffcd4abc370 R14: 00007ffcd4abc3a0 R15: 00007ffcd4abc700 [ 46.317270] [ 46.317579] [ 46.317805] Allocated by task 211: [ 46.318248] kasan_save_stack+0x22/0x50 [ 46.318771] kasan_set_track+0x25/0x30 [ 46.319289] __kasan_slab_alloc+0x59/0x70 [ 46.319820] kmem_cache_alloc+0x16b/0x370 [ 46.320353] vm_area_dup+0x20/0x160 [ 46.320809] __split_vma+0x170/0x950 [ 46.321280] split_vma+0xc6/0x110 [ 46.321723] mprotect_fixup+0x8d2/0xb30 [ 46.322228] do_mprotect_pkey+0x87e/0xd40 [ 46.322756] __x64_sys_mprotect+0x78/0xc0 [ 46.323277] do_syscall_64+0x3f/0x90 [ 46.323758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.324425] [ 46.324644] Freed by task 211: [ 46.325037] kasan_save_stack+0x22/0x50 [ 46.325542] kasan_set_track+0x25/0x30 [ 46.326039] kasan_save_free_info+0x2b/0x50 [ 46.326574] __kasan_slab_free+0x10a/0x190 [ 46.327113] kmem_cache_free+0x10d/0x4d0 [ 46.327649] rcu_core+0x8c8/0x2860 [ 46.328110] __do_softirq+0x1b7/0x7d4 [ 46.328587] [ 46.328802] Last potentially related work creation: [ 46.329385] kasan_save_stack+0x22/0x50 [ 46.329888] __kasan_record_aux_stack+0x8e/0xa0 [ 46.330460] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.331105] remove_vma+0x139/0x170 [ 46.331566] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.332143] do_vmi_munmap+0x1f1/0x2b0 [ 46.332630] __vm_munmap+0x138/0x3a0 [ 46.333102] __x64_sys_munmap+0x59/0x80 [ 46.333600] do_syscall_64+0x3f/0x90 [ 46.334084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.334723] [ 46.334937] The buggy address belongs to the object at ffff8880147fb828 [ 46.334937] which belongs to the cache vm_area_struct of size 168 [ 46.336402] The buggy address is located 88 bytes inside of [ 46.336402] freed 168-byte region [ffff8880147fb828, ffff8880147fb8d0) [ 46.337815] [ 46.338037] The buggy address belongs to the physical page: [ 46.338697] page:000000002f2c1dac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147fb [ 46.339794] memcg:ffff88800d9d1801 [ 46.340228] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.340879] page_type: 0xffffffff() [ 46.341338] raw: 0100000000000200 ffff88800879fc80 ffffea000036a600 dead000000000002 [ 46.342261] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9d1801 [ 46.343176] page dumped because: kasan: bad access detected [ 46.343833] [ 46.344067] Memory state around the buggy address: [ 46.344652] ffff8880147fb780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 46.345519] ffff8880147fb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 46.346403] >ffff8880147fb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 46.347257] ^ [ 46.347673] ffff8880147fb900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.348558] ffff8880147fb980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 46.349413] ================================================================== [ 46.350487] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 48.667011] BUG: Bad rss-counter state mm:00000000806f1d59 type:MM_FILEPAGES val:33 [ 48.668084] BUG: Bad rss-counter state mm:00000000806f1d59 type:MM_ANONPAGES val:22 [ 49.125988] BUG: Bad rss-counter state mm:00000000410f5cac type:MM_FILEPAGES val:33 [ 49.126981] BUG: Bad rss-counter state mm:00000000410f5cac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17717' (ECDSA) to the list of known hosts. 2023/06/20 07:47:58 fuzzer started 2023/06/20 07:47:58 dialing manager at localhost:44161 2023/06/20 07:47:58 checking machine... 2023/06/20 07:47:58 checking revisions... [ 49.842473] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:47:58 testing simple program... [ 49.884017] cgroup: Unknown subsys name 'net' [ 49.950783] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:47:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fe2cdee8010 CR3=000000000c762000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=7400ccba112c9e9dea47647033700e74 XMM02=000000000011e870ec2efd57dc4c00df XMM03=0000000000124e48426f7c3b803143a5 XMM04=3d5150f84d1a20d800000000000ae988 XMM05=751b9502027dc0b90000000000134700 XMM06=a2496d1a2b3a196000000000001338d8 XMM07=e042d86d42eb936e00000000001250c8 XMM08=426f7c3b803143a5000000000011e8d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff888016b9fbe8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=1ffff1100fffb8bb R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf35080 R15=0000000000000000 RIP=ffffffff8135b930 RFL=00000282 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe4f039e900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffcdd362d7c CR3=000000000d966000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=b0d3907c5a39f5b2ba4768722e39d1ac XMM05=00000000000000000000000000000000 XMM06=737365635a39733d734768202e39733d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000