syzkaller login: [ 38.358204] BUG: Bad rss-counter state mm:000000007e804008 type:MM_FILEPAGES val:33 [ 38.359642] BUG: Bad rss-counter state mm:000000007e804008 type:MM_ANONPAGES val:22 [ 38.534482] ================================================================== [ 38.535658] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.536980] Read of size 8 at addr ffff88800e25b4e0 by task sshd/221 [ 38.537944] [ 38.538200] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.539239] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.540381] Call Trace: [ 38.540767] [ 38.541100] dump_stack_lvl+0x91/0xf0 [ 38.541675] print_report+0xcc/0x620 [ 38.542285] ? __virt_addr_valid+0x102/0x340 [ 38.542942] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.543666] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.544387] kasan_report+0xbe/0xf0 [ 38.544967] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.545684] vma_interval_tree_remove+0xc75/0xec0 [ 38.546384] vma_prepare+0xc54/0x11a0 [ 38.546930] __split_vma+0x5af/0x950 [ 38.547479] ? __pfx___split_vma+0x10/0x10 [ 38.548089] ? find_held_lock+0x2c/0x110 [ 38.548707] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.549372] ? lock_is_held_type+0x9f/0x120 [ 38.549986] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.550699] ? mtree_range_walk+0x632/0x900 [ 38.551344] ? mas_walk+0x5c7/0x7c0 [ 38.551903] do_vmi_munmap+0x1f1/0x2b0 [ 38.552483] mmap_region+0x1f9/0x2660 [ 38.553059] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.553671] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.554516] ? __pfx_lock_acquire+0x10/0x10 [ 38.555137] ? __pfx_mmap_region+0x10/0x10 [ 38.555769] ? security_mmap_addr+0x7d/0xa0 [ 38.556384] ? get_unmapped_area+0x1f5/0x3f0 [ 38.557054] do_mmap+0x854/0xf00 [ 38.557541] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.558084] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.558735] ksys_mmap_pgoff+0x3af/0x500 [ 38.559342] do_syscall_64+0x3f/0x90 [ 38.559897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.560660] RIP: 0033:0x7f968d283d82 [ 38.561176] 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 [ 38.563690] RSP: 002b:00007fff2f280e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.564784] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f968d283d82 [ 38.565769] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f968c6bd000 [ 38.566758] RBP: 00007f968c6bd000 R08: 0000000000000009 R09: 0000000000001000 [ 38.567696] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f202534ec0 [ 38.568697] R13: 00007fff2f280e40 R14: 00007fff2f280e70 R15: 00007fff2f2811d0 [ 38.569719] [ 38.570057] [ 38.570309] Allocated by task 214: [ 38.570822] kasan_save_stack+0x22/0x50 [ 38.571414] kasan_set_track+0x25/0x30 [ 38.572005] __kasan_slab_alloc+0x59/0x70 [ 38.572612] kmem_cache_alloc+0x16b/0x370 [ 38.573259] vm_area_dup+0x20/0x160 [ 38.573792] __split_vma+0x170/0x950 [ 38.574345] split_vma+0xc6/0x110 [ 38.574871] mprotect_fixup+0x8d2/0xb30 [ 38.575473] do_mprotect_pkey+0x87e/0xd40 [ 38.576086] __x64_sys_mprotect+0x78/0xc0 [ 38.576707] do_syscall_64+0x3f/0x90 [ 38.577268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.578017] [ 38.578270] Freed by task 214: [ 38.578748] kasan_save_stack+0x22/0x50 [ 38.579360] kasan_set_track+0x25/0x30 [ 38.579944] kasan_save_free_info+0x2b/0x50 [ 38.580585] __kasan_slab_free+0x10a/0x190 [ 38.581239] kmem_cache_free+0x10d/0x4d0 [ 38.581837] rcu_core+0x8c8/0x2860 [ 38.582370] __do_softirq+0x1b7/0x7d4 [ 38.582930] [ 38.583182] Last potentially related work creation: [ 38.583869] kasan_save_stack+0x22/0x50 [ 38.584439] __kasan_record_aux_stack+0x8e/0xa0 [ 38.585120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.585875] remove_vma+0x139/0x170 [ 38.586418] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.587091] do_vmi_munmap+0x1f1/0x2b0 [ 38.587656] __vm_munmap+0x138/0x3a0 [ 38.588227] __x64_sys_munmap+0x59/0x80 [ 38.588833] do_syscall_64+0x3f/0x90 [ 38.589385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.590019] [ 38.590236] The buggy address belongs to the object at ffff88800e25b488 [ 38.590236] which belongs to the cache vm_area_struct of size 168 [ 38.591662] The buggy address is located 88 bytes inside of [ 38.591662] freed 168-byte region [ffff88800e25b488, ffff88800e25b530) [ 38.593040] [ 38.593254] The buggy address belongs to the physical page: [ 38.593881] page:000000006253ccc3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe25b [ 38.594937] memcg:ffff88800f759401 [ 38.595351] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.595983] page_type: 0xffffffff() [ 38.596418] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.597313] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f759401 [ 38.598224] page dumped because: kasan: bad access detected [ 38.598873] [ 38.599088] Memory state around the buggy address: [ 38.599662] ffff88800e25b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.600503] ffff88800e25b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.601357] >ffff88800e25b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.602196] ^ [ 38.602943] ffff88800e25b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.603780] ffff88800e25b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.604612] ================================================================== [ 38.605696] Disabling lock debugging due to kernel taint [ 40.742910] BUG: Bad rss-counter state mm:000000003cfb3036 type:MM_FILEPAGES val:33 [ 40.744065] BUG: Bad rss-counter state mm:000000003cfb3036 type:MM_ANONPAGES val:22 [ 41.244764] BUG: Bad rss-counter state mm:0000000064a9fc5b type:MM_FILEPAGES val:33 [ 41.245967] BUG: Bad rss-counter state mm:0000000064a9fc5b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3281' (ECDSA) to the list of known hosts. 2023/06/20 08:25:54 fuzzer started 2023/06/20 08:25:54 dialing manager at localhost:44161 2023/06/20 08:25:54 checking machine... 2023/06/20 08:25:54 checking revisions... [ 41.833942] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:25:54 testing simple program... [ 41.883491] cgroup: Unknown subsys name 'net' [ 41.922385] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:25:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffea00005a7e18 RCX=0000000000000003 RDX=ffffea00005a7e18 RSI=ffffea00005a7c01 RDI=ffffea00005a7de8 RBP=dffffc0000000000 RSP=ffff888009787230 R8 =0000000000000001 R9 =fffff940000b4f80 R10=ffffea00005a7c07 R11=00000000000b6996 R12=ffffea00005a7c00 R13=ffffea00005a7dc0 R14=ffffea00005a7c58 R15=dead000000000400 RIP=ffffffff8178cb9e RFL=00000246 [---Z-P-] 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6c102bf900 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=00007f6c10876618 CR3=000000000eb58000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f31653e6e70 CR3=000000000cfae000 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=08855d9284f97b8b224d94c4e533fe36 XMM02=000000000011c690eff9b2d0a8fce9cb XMM03=000000000011c7602c67c8bc2e329bc3 XMM04=53cfff5efa02ee5000000000000ae988 XMM05=e4cb8bb95a7664b60000000000133c40 XMM06=bf2da008ed64a62f0000000000132aa8 XMM07=e042d86d42eb936e0000000000124320 XMM08=be2b971afd28e39e000000000011c760 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000