syzkaller login: [ 33.798167] BUG: Bad rss-counter state mm:000000002a124cab type:MM_FILEPAGES val:33 [ 33.799703] BUG: Bad rss-counter state mm:000000002a124cab type:MM_ANONPAGES val:22 [ 33.842515] ================================================================== [ 33.843672] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.844827] Read of size 8 at addr ffff88800e436880 by task sshd/218 [ 33.845657] [ 33.845888] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.846806] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.847821] Call Trace: [ 33.848165] [ 33.848469] dump_stack_lvl+0x91/0xf0 [ 33.848982] print_report+0xcc/0x620 [ 33.849523] ? __virt_addr_valid+0x102/0x340 [ 33.850111] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.850759] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.851438] kasan_report+0xbe/0xf0 [ 33.852085] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.852933] vma_interval_tree_remove+0xc75/0xec0 [ 33.853770] vma_prepare+0xc54/0x11a0 [ 33.854416] __split_vma+0x5af/0x950 [ 33.855060] ? __pfx___split_vma+0x10/0x10 [ 33.855791] ? find_held_lock+0x2c/0x110 [ 33.856509] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.857300] ? lock_is_held_type+0x9f/0x120 [ 33.858046] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.858870] ? mtree_range_walk+0x632/0x900 [ 33.859620] ? mas_walk+0x5c7/0x7c0 [ 33.860269] do_vmi_munmap+0x1f1/0x2b0 [ 33.860935] mmap_region+0x1f9/0x2660 [ 33.861609] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.862308] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.863290] ? __pfx_lock_acquire+0x10/0x10 [ 33.864025] ? __pfx_mmap_region+0x10/0x10 [ 33.864742] ? security_mmap_addr+0x7d/0xa0 [ 33.865476] ? get_unmapped_area+0x1f5/0x3f0 [ 33.866238] do_mmap+0x854/0xf00 [ 33.866825] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.867487] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.868252] ksys_mmap_pgoff+0x3af/0x500 [ 33.868946] do_syscall_64+0x3f/0x90 [ 33.869609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.870491] RIP: 0033:0x7fb8e3e61d82 [ 33.871111] 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 [ 33.874023] RSP: 002b:00007ffc0ee19be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.875263] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb8e3e61d82 [ 33.876375] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb8e329b000 [ 33.877347] RBP: 00007fb8e329b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.878213] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ab6fa6980 [ 33.879087] R13: 00007ffc0ee19c00 R14: 00007ffc0ee19c30 R15: 00007ffc0ee19f90 [ 33.879968] [ 33.880269] [ 33.880497] Allocated by task 211: [ 33.880942] kasan_save_stack+0x22/0x50 [ 33.881488] kasan_set_track+0x25/0x30 [ 33.882007] __kasan_slab_alloc+0x59/0x70 [ 33.882555] kmem_cache_alloc+0x16b/0x370 [ 33.883091] vm_area_dup+0x20/0x160 [ 33.883653] __split_vma+0x170/0x950 [ 33.884151] split_vma+0xc6/0x110 [ 33.884610] mprotect_fixup+0x8d2/0xb30 [ 33.885124] do_mprotect_pkey+0x87e/0xd40 [ 33.885681] __x64_sys_mprotect+0x78/0xc0 [ 33.886229] do_syscall_64+0x3f/0x90 [ 33.886724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.887393] [ 33.887625] Freed by task 211: [ 33.888034] kasan_save_stack+0x22/0x50 [ 33.888564] kasan_set_track+0x25/0x30 [ 33.889076] kasan_save_free_info+0x2b/0x50 [ 33.889645] __kasan_slab_free+0x10a/0x190 [ 33.890202] kmem_cache_free+0x10d/0x4d0 [ 33.890742] rcu_core+0x8c8/0x2860 [ 33.891216] __do_softirq+0x1b7/0x7d4 [ 33.891711] [ 33.891938] Last potentially related work creation: [ 33.892544] kasan_save_stack+0x22/0x50 [ 33.893082] __kasan_record_aux_stack+0x8e/0xa0 [ 33.893708] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.894385] remove_vma+0x139/0x170 [ 33.894856] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.895440] do_vmi_munmap+0x1f1/0x2b0 [ 33.895940] __vm_munmap+0x138/0x3a0 [ 33.896414] __x64_sys_munmap+0x59/0x80 [ 33.896917] do_syscall_64+0x3f/0x90 [ 33.897408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.898077] [ 33.898298] The buggy address belongs to the object at ffff88800e436828 [ 33.898298] which belongs to the cache vm_area_struct of size 168 [ 33.899801] The buggy address is located 88 bytes inside of [ 33.899801] freed 168-byte region [ffff88800e436828, ffff88800e4368d0) [ 33.901281] [ 33.901506] The buggy address belongs to the physical page: [ 33.902186] page:00000000a5dfa852 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe436 [ 33.903284] memcg:ffff88800e1fed01 [ 33.903724] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.904386] page_type: 0xffffffff() [ 33.904848] raw: 0100000000000200 ffff88800879fc80 ffffea0000379a40 dead000000000004 [ 33.905815] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1fed01 [ 33.906750] page dumped because: kasan: bad access detected [ 33.907437] [ 33.907661] Memory state around the buggy address: [ 33.908254] ffff88800e436780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.909137] ffff88800e436800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.910032] >ffff88800e436880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.910911] ^ [ 33.911343] ffff88800e436900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.912226] ffff88800e436980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 33.913095] ================================================================== [ 33.914139] Disabling lock debugging due to kernel taint [ 35.530256] BUG: Bad rss-counter state mm:000000006f8bc261 type:MM_FILEPAGES val:33 [ 35.531263] BUG: Bad rss-counter state mm:000000006f8bc261 type:MM_ANONPAGES val:22 [ 36.081171] BUG: Bad rss-counter state mm:000000004dd9707d type:MM_FILEPAGES val:33 [ 36.082458] BUG: Bad rss-counter state mm:000000004dd9707d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8344' (ECDSA) to the list of known hosts. 2023/06/19 19:34:32 fuzzer started 2023/06/19 19:34:32 dialing manager at localhost:44161 2023/06/19 19:34:32 checking machine... 2023/06/19 19:34:32 checking revisions... [ 36.783818] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:34:32 testing simple program... [ 36.836985] cgroup: Unknown subsys name 'net' [ 36.893661] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:34:22 Registers: info registers vcpu 0 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff8180c584 RDX=dffffc0000000000 RSI=00000000000080c5 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8613751e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130754 RFL=00000287 [--S--PC] 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 00007f664d896900 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=00007f664de4b650 CR3=000000000eb38000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=00007fd02e232d80 CR3=000000000f258000 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=dc47f14ab1541c8b724a63ff12e14009 XMM02=000000000011d378ec2efd57dc4c00df XMM03=0000000000123df84f76860481781b30 XMM04=b2b0028cf88e992f00000000000ae988 XMM05=1280811063b04f8c0000000000134b40 XMM06=bdf2e299e47b49d50000000000133870 XMM07=e042d86d42eb936e00000000001240d0 XMM08=4f76860481781b30000000000011d3d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000