[ 45.816327] BUG: Bad rss-counter state mm:0000000039bef40c type:MM_FILEPAGES val:33 [ 45.817900] BUG: Bad rss-counter state mm:0000000039bef40c type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 45.975352] ================================================================== [ 45.976233] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.977115] Read of size 8 at addr ffff88800f1603f8 by task sshd/219 [ 45.977834] [ 45.978042] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.979014] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.979921] Call Trace: [ 45.980224] [ 45.980493] dump_stack_lvl+0x91/0xf0 [ 45.980962] print_report+0xcc/0x620 [ 45.981420] ? __virt_addr_valid+0x102/0x340 [ 45.981945] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.982550] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.983141] kasan_report+0xbe/0xf0 [ 45.983590] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.984179] vma_interval_tree_remove+0xc75/0xec0 [ 45.984757] vma_prepare+0xc54/0x11a0 [ 45.985235] __split_vma+0x5af/0x950 [ 45.985701] ? __pfx___split_vma+0x10/0x10 [ 45.986224] ? find_held_lock+0x2c/0x110 [ 45.986735] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.987291] ? lock_is_held_type+0x9f/0x120 [ 45.987808] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.988409] ? mtree_range_walk+0x632/0x900 [ 45.988954] ? mas_walk+0x5c7/0x7c0 [ 45.989422] do_vmi_munmap+0x1f1/0x2b0 [ 45.989908] mmap_region+0x1f9/0x2660 [ 45.990409] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.990913] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.991609] ? __pfx_lock_acquire+0x10/0x10 [ 45.992129] ? __pfx_mmap_region+0x10/0x10 [ 45.992646] ? security_mmap_addr+0x7d/0xa0 [ 45.993175] ? get_unmapped_area+0x1f5/0x3f0 [ 45.993717] do_mmap+0x854/0xf00 [ 45.994144] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.994653] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.995206] ksys_mmap_pgoff+0x3af/0x500 [ 45.995702] do_syscall_64+0x3f/0x90 [ 45.996177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.996807] RIP: 0033:0x7f190d806d82 [ 45.997251] 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 [ 45.999367] RSP: 002b:00007fff814c96e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.000253] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f190d806d82 [ 46.001081] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f190cc40000 [ 46.001903] RBP: 00007f190cc40000 R08: 0000000000000009 R09: 0000000000001000 [ 46.002752] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da7c431ec0 [ 46.003589] R13: 00007fff814c9700 R14: 00007fff814c9730 R15: 00007fff814c9a90 [ 46.004423] [ 46.004711] [ 46.004923] Allocated by task 212: [ 46.005350] kasan_save_stack+0x22/0x50 [ 46.005845] kasan_set_track+0x25/0x30 [ 46.006335] __kasan_slab_alloc+0x59/0x70 [ 46.006841] kmem_cache_alloc+0x16b/0x370 [ 46.007353] vm_area_dup+0x20/0x160 [ 46.007797] __split_vma+0x170/0x950 [ 46.008269] split_vma+0xc6/0x110 [ 46.008702] mprotect_fixup+0x8d2/0xb30 [ 46.009192] do_mprotect_pkey+0x87e/0xd40 [ 46.009711] __x64_sys_mprotect+0x78/0xc0 [ 46.010236] do_syscall_64+0x3f/0x90 [ 46.010710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.011334] [ 46.011546] Freed by task 212: [ 46.011932] kasan_save_stack+0x22/0x50 [ 46.012431] kasan_set_track+0x25/0x30 [ 46.012916] kasan_save_free_info+0x2b/0x50 [ 46.013438] __kasan_slab_free+0x10a/0x190 [ 46.013971] kmem_cache_free+0x10d/0x4d0 [ 46.014479] rcu_core+0x8c8/0x2860 [ 46.014909] __do_softirq+0x1b7/0x7d4 [ 46.015383] [ 46.015590] Last potentially related work creation: [ 46.016233] kasan_save_stack+0x22/0x50 [ 46.016738] __kasan_record_aux_stack+0x8e/0xa0 [ 46.017286] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.017909] remove_vma+0x139/0x170 [ 46.018366] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.018908] do_vmi_munmap+0x1f1/0x2b0 [ 46.019381] __vm_munmap+0x138/0x3a0 [ 46.019950] __x64_sys_munmap+0x59/0x80 [ 46.020445] do_syscall_64+0x3f/0x90 [ 46.020911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.021527] [ 46.021733] The buggy address belongs to the object at ffff88800f1603a0 [ 46.021733] which belongs to the cache vm_area_struct of size 168 [ 46.023170] The buggy address is located 88 bytes inside of [ 46.023170] freed 168-byte region [ffff88800f1603a0, ffff88800f160448) [ 46.024535] [ 46.024744] The buggy address belongs to the physical page: [ 46.025388] page:0000000091dfb672 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf160 [ 46.026535] memcg:ffff88801a1d4401 [ 46.026965] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.027609] page_type: 0xffffffff() [ 46.028061] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.028978] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1d4401 [ 46.029890] page dumped because: kasan: bad access detected [ 46.030592] [ 46.030805] Memory state around the buggy address: [ 46.031383] ffff88800f160280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 46.032232] ffff88800f160300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 46.033088] >ffff88800f160380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 46.033933] ^ [ 46.034782] ffff88800f160400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 46.035619] ffff88800f160480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.036463] ================================================================== [ 46.037372] Disabling lock debugging due to kernel taint [ 48.892418] BUG: Bad rss-counter state mm:0000000042660a2e type:MM_FILEPAGES val:33 [ 48.893407] BUG: Bad rss-counter state mm:0000000042660a2e type:MM_ANONPAGES val:22 [ 49.419387] BUG: Bad rss-counter state mm:0000000020189faf type:MM_FILEPAGES val:33 [ 49.420606] BUG: Bad rss-counter state mm:0000000020189faf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15045' (ECDSA) to the list of known hosts. 2023/06/20 02:55:15 fuzzer started 2023/06/20 02:55:15 dialing manager at localhost:44161 2023/06/20 02:55:15 checking machine... 2023/06/20 02:55:15 checking revisions... [ 50.141876] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:55:15 testing simple program... [ 50.201325] cgroup: Unknown subsys name 'net' [ 50.244473] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:55:00 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff8880162951f0 RCX=0000000000000000 RDX=ffff8880164db680 RSI=ffffffff81979f48 RDI=0000000000000001 RBP=ffffea00006200c0 RSP=ffff888014117a90 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffffffff81b291d0 R14=ffffea0000620088 R15=ffff888014117d90 RIP=ffffffff814c0800 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4a80347900 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=00007f4a7f7de5a0 CR3=00000000136aa000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=899586ffa6c95a9000000000000ae988 XMM05=96e2327d49b10e420000000000134ae8 XMM06=dfcdbad4f1609c3700000000001338c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007ff15b25a9d8 RSP=ffff88806cf099f8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=00007ff15b25a9d8 R13=0000000000000000 R14=ffff888010339b40 R15=ffff88800fc8fcf0 RIP=ffffffff814c8416 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff15a6cf900 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=00007ff15aa6c31c CR3=000000000e580000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000