syzkaller login: [ 32.117595] BUG: Bad rss-counter state mm:0000000050ca6ca9 type:MM_FILEPAGES val:33 [ 32.118617] BUG: Bad rss-counter state mm:0000000050ca6ca9 type:MM_ANONPAGES val:22 [ 32.288906] ================================================================== [ 32.289826] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.290784] Read of size 8 at addr ffff88800c7ad5c8 by task sshd/221 [ 32.291559] [ 32.291773] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.292731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.293709] Call Trace: [ 32.294038] [ 32.294334] dump_stack_lvl+0x91/0xf0 [ 32.294843] print_report+0xcc/0x620 [ 32.295335] ? __virt_addr_valid+0x102/0x340 [ 32.295881] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.296505] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.297120] kasan_report+0xbe/0xf0 [ 32.297594] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.298220] vma_interval_tree_remove+0xc75/0xec0 [ 32.298856] vma_prepare+0xc54/0x11a0 [ 32.299342] __split_vma+0x5af/0x950 [ 32.299818] ? __pfx___split_vma+0x10/0x10 [ 32.300344] ? find_held_lock+0x2c/0x110 [ 32.300865] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.301437] ? lock_is_held_type+0x9f/0x120 [ 32.301980] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.302593] ? mtree_range_walk+0x632/0x900 [ 32.303142] ? mas_walk+0x5c7/0x7c0 [ 32.303615] do_vmi_munmap+0x1f1/0x2b0 [ 32.304107] mmap_region+0x1f9/0x2660 [ 32.304590] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.305098] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.305809] ? __pfx_lock_acquire+0x10/0x10 [ 32.306347] ? __pfx_mmap_region+0x10/0x10 [ 32.306879] ? security_mmap_addr+0x7d/0xa0 [ 32.307417] ? get_unmapped_area+0x1f5/0x3f0 [ 32.307963] do_mmap+0x854/0xf00 [ 32.308405] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.308897] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.309457] ksys_mmap_pgoff+0x3af/0x500 [ 32.309962] do_syscall_64+0x3f/0x90 [ 32.310437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.311097] RIP: 0033:0x7f90e8591d82 [ 32.311551] 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 [ 32.313663] RSP: 002b:00007ffda1ba4968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.314579] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90e8591d82 [ 32.315424] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90e79cb000 [ 32.316268] RBP: 00007f90e79cb000 R08: 0000000000000009 R09: 0000000000001000 [ 32.317113] R10: 0000000000000812 R11: 0000000000000206 R12: 00005615e1402f70 [ 32.317976] R13: 00007ffda1ba4980 R14: 00007ffda1ba49b0 R15: 00007ffda1ba4d10 [ 32.318851] [ 32.319145] [ 32.319365] Allocated by task 214: [ 32.319791] kasan_save_stack+0x22/0x50 [ 32.320307] kasan_set_track+0x25/0x30 [ 32.320806] __kasan_slab_alloc+0x59/0x70 [ 32.321337] kmem_cache_alloc+0x16b/0x370 [ 32.321859] vm_area_dup+0x20/0x160 [ 32.322324] __split_vma+0x170/0x950 [ 32.322796] split_vma+0xc6/0x110 [ 32.323244] mprotect_fixup+0x8d2/0xb30 [ 32.323758] do_mprotect_pkey+0x87e/0xd40 [ 32.324282] __x64_sys_mprotect+0x78/0xc0 [ 32.324809] do_syscall_64+0x3f/0x90 [ 32.325291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.325943] [ 32.326163] Freed by task 214: [ 32.326577] kasan_save_stack+0x22/0x50 [ 32.327091] kasan_set_track+0x25/0x30 [ 32.327616] kasan_save_free_info+0x2b/0x50 [ 32.328157] __kasan_slab_free+0x10a/0x190 [ 32.328703] kmem_cache_free+0x10d/0x4d0 [ 32.329207] rcu_core+0x8c8/0x2860 [ 32.329652] __do_softirq+0x1b7/0x7d4 [ 32.330140] [ 32.330359] Last potentially related work creation: [ 32.330960] kasan_save_stack+0x22/0x50 [ 32.331467] __kasan_record_aux_stack+0x8e/0xa0 [ 32.332054] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.332733] remove_vma+0x139/0x170 [ 32.333214] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.333810] do_vmi_munmap+0x1f1/0x2b0 [ 32.334320] __vm_munmap+0x138/0x3a0 [ 32.334822] __x64_sys_munmap+0x59/0x80 [ 32.335330] do_syscall_64+0x3f/0x90 [ 32.335806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.336445] [ 32.336660] Second to last potentially related work creation: [ 32.337344] kasan_save_stack+0x22/0x50 [ 32.337844] __kasan_record_aux_stack+0x8e/0xa0 [ 32.338432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.339104] remove_vma+0x139/0x170 [ 32.339569] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.340125] do_vmi_munmap+0x1f1/0x2b0 [ 32.340611] mmap_region+0x1f9/0x2660 [ 32.341091] do_mmap+0x854/0xf00 [ 32.341525] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.342011] ksys_mmap_pgoff+0x7d/0x500 [ 32.342504] do_syscall_64+0x3f/0x90 [ 32.342994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.343636] [ 32.343856] The buggy address belongs to the object at ffff88800c7ad570 [ 32.343856] which belongs to the cache vm_area_struct of size 168 [ 32.345447] The buggy address is located 88 bytes inside of [ 32.345447] freed 168-byte region [ffff88800c7ad570, ffff88800c7ad618) [ 32.347177] [ 32.347444] The buggy address belongs to the physical page: [ 32.348246] page:00000000a9087c61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7ad [ 32.349565] memcg:ffff8880144dcb01 [ 32.350094] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.350915] page_type: 0xffffffff() [ 32.351431] raw: 0100000000000200 ffff88800879fc80 ffffea0000394740 dead000000000003 [ 32.352401] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144dcb01 [ 32.353413] page dumped because: kasan: bad access detected [ 32.354186] [ 32.354430] Memory state around the buggy address: [ 32.355033] ffff88800c7ad480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.355891] ffff88800c7ad500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.356896] >ffff88800c7ad580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.357799] ^ [ 32.358468] ffff88800c7ad600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.359339] ffff88800c7ad680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.360192] ================================================================== [ 32.361195] Disabling lock debugging due to kernel taint [ 34.211223] BUG: Bad rss-counter state mm:00000000d90874ba type:MM_FILEPAGES val:33 [ 34.212710] BUG: Bad rss-counter state mm:00000000d90874ba type:MM_ANONPAGES val:22 [ 34.766594] BUG: Bad rss-counter state mm:00000000773c6696 type:MM_FILEPAGES val:33 [ 34.767762] BUG: Bad rss-counter state mm:00000000773c6696 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12193' (ECDSA) to the list of known hosts. 2023/06/19 18:32:30 fuzzer started 2023/06/19 18:32:30 dialing manager at localhost:44161 2023/06/19 18:32:30 checking machine... 2023/06/19 18:32:30 checking revisions... [ 35.425047] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:32:30 testing simple program... [ 35.481576] cgroup: Unknown subsys name 'net' [ 35.529300] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:32:28 Registers: info registers vcpu 0 RAX=0000000000000098 RBX=0000000000000000 RCX=0000000000147940 RDX=0000000000147900 RSI=0000000000000008 RDI=0000000000147900 RBP=ffff88801644fd10 RSP=ffff88801644fcb0 R8 =ffff8880192342f0 R9 =0000000000040d50 R10=0000000000000000 R11=00000000000b6996 R12=ffff8880087b6500 R13=ffff88801593ab80 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff81808671 RFL=00000286 [--S--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 00007f5c62e9d900 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=00007ffc33274000 CR3=000000001a238000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a5883d RBX=0000000000000000 RCX=0000000000000100 RDX=dffffc0000000000 RSI=0000000000000000 RDI=ffffea00007336c0 RBP=ffffea00007336c0 RSP=ffff88806cf09dc8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=ffffed10031dea02 R14=dffffc0000000000 R15=ffff888018ef5010 RIP=ffffffff81790285 RFL=00000212 [----A--] 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 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=00007f0ac37c5170 CR3=000000000c938000 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=562ad11db4ea1fad094f370427c99cc0 XMM02=000000000011d630ec2efd57dc4c00df XMM03=0000000000124fd072479b00547f71b1 XMM04=1f5b5bcb1920940600000000000ae988 XMM05=e4cb8bb95a7664b60000000000135e50 XMM06=d4b1784dee78835b0000000000134cb8 XMM07=e042d86d42eb936e0000000000125250 XMM08=72479b00547f71b1000000000011d690 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000