syzkaller login: [ 39.826262] BUG: Bad rss-counter state mm:00000000404c5005 type:MM_FILEPAGES val:33 [ 39.827484] BUG: Bad rss-counter state mm:00000000404c5005 type:MM_ANONPAGES val:22 [ 39.865488] ================================================================== [ 39.866395] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.867350] Read of size 8 at addr ffff8880144c2a50 by task sshd/218 [ 39.868182] [ 39.868417] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.869290] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.870268] Call Trace: [ 39.870592] [ 39.870882] dump_stack_lvl+0x91/0xf0 [ 39.871374] print_report+0xcc/0x620 [ 39.871862] ? __virt_addr_valid+0x102/0x340 [ 39.872424] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.873048] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.873670] kasan_report+0xbe/0xf0 [ 39.874148] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.874784] vma_interval_tree_remove+0xc75/0xec0 [ 39.875392] vma_prepare+0xc54/0x11a0 [ 39.875876] __split_vma+0x5af/0x950 [ 39.876368] ? __pfx___split_vma+0x10/0x10 [ 39.876904] ? find_held_lock+0x2c/0x110 [ 39.877435] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.878007] ? lock_is_held_type+0x9f/0x120 [ 39.878543] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.879158] ? mtree_range_walk+0x632/0x900 [ 39.879705] ? mas_walk+0x5c7/0x7c0 [ 39.880180] do_vmi_munmap+0x1f1/0x2b0 [ 39.880695] mmap_region+0x1f9/0x2660 [ 39.881180] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.881690] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.882404] ? __pfx_lock_acquire+0x10/0x10 [ 39.882936] ? __pfx_mmap_region+0x10/0x10 [ 39.883469] ? security_mmap_addr+0x7d/0xa0 [ 39.884007] ? get_unmapped_area+0x1f5/0x3f0 [ 39.884573] do_mmap+0x854/0xf00 [ 39.885011] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.885509] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.886078] ksys_mmap_pgoff+0x3af/0x500 [ 39.886586] do_syscall_64+0x3f/0x90 [ 39.887066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.887715] RIP: 0033:0x7fb4caff8d82 [ 39.888175] 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 [ 39.890323] RSP: 002b:00007ffea33671c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.891223] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4caff8d82 [ 39.892098] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb4ca432000 [ 39.892956] RBP: 00007fb4ca432000 R08: 0000000000000009 R09: 0000000000001000 [ 39.893811] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae7e69bd90 [ 39.894676] R13: 00007ffea33671e0 R14: 00007ffea3367210 R15: 00007ffea3367570 [ 39.895555] [ 39.895849] [ 39.896071] Allocated by task 211: [ 39.896515] kasan_save_stack+0x22/0x50 [ 39.897019] kasan_set_track+0x25/0x30 [ 39.897519] __kasan_slab_alloc+0x59/0x70 [ 39.898054] kmem_cache_alloc+0x16b/0x370 [ 39.898573] vm_area_dup+0x20/0x160 [ 39.899024] __split_vma+0x170/0x950 [ 39.899498] split_vma+0xc6/0x110 [ 39.899944] mprotect_fixup+0x8d2/0xb30 [ 39.900462] do_mprotect_pkey+0x87e/0xd40 [ 39.900983] __x64_sys_mprotect+0x78/0xc0 [ 39.901509] do_syscall_64+0x3f/0x90 [ 39.901985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.902639] [ 39.902853] Freed by task 211: [ 39.903249] kasan_save_stack+0x22/0x50 [ 39.903753] kasan_set_track+0x25/0x30 [ 39.904258] kasan_save_free_info+0x2b/0x50 [ 39.904795] __kasan_slab_free+0x10a/0x190 [ 39.905330] kmem_cache_free+0x10d/0x4d0 [ 39.905844] rcu_core+0x8c8/0x2860 [ 39.906297] __do_softirq+0x1b7/0x7d4 [ 39.906774] [ 39.906987] Last potentially related work creation: [ 39.907575] kasan_save_stack+0x22/0x50 [ 39.908100] __kasan_record_aux_stack+0x8e/0xa0 [ 39.908708] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.909364] remove_vma+0x139/0x170 [ 39.909830] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.910403] do_vmi_munmap+0x1f1/0x2b0 [ 39.910896] __vm_munmap+0x138/0x3a0 [ 39.911367] __x64_sys_munmap+0x59/0x80 [ 39.911867] do_syscall_64+0x3f/0x90 [ 39.912368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.913013] [ 39.913231] The buggy address belongs to the object at ffff8880144c29f8 [ 39.913231] which belongs to the cache vm_area_struct of size 168 [ 39.914720] The buggy address is located 88 bytes inside of [ 39.914720] freed 168-byte region [ffff8880144c29f8, ffff8880144c2aa0) [ 39.916136] [ 39.916357] The buggy address belongs to the physical page: [ 39.917019] page:0000000009d5baba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144c2 [ 39.918109] memcg:ffff88800d7c3301 [ 39.918529] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.919172] page_type: 0xffffffff() [ 39.919622] raw: 0100000000000200 ffff88800879fc80 ffffea000038e140 dead000000000004 [ 39.920559] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7c3301 [ 39.921471] page dumped because: kasan: bad access detected [ 39.922128] [ 39.922345] Memory state around the buggy address: [ 39.922929] ffff8880144c2900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.923787] ffff8880144c2980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 39.924653] >ffff8880144c2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.925494] ^ [ 39.926195] ffff8880144c2a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.927052] ffff8880144c2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.927894] ================================================================== [ 39.928865] Disabling lock debugging due to kernel taint [ 41.804943] BUG: Bad rss-counter state mm:00000000bb3c728e type:MM_FILEPAGES val:33 [ 41.805965] BUG: Bad rss-counter state mm:00000000bb3c728e type:MM_ANONPAGES val:22 [ 42.220965] BUG: Bad rss-counter state mm:00000000db7c45ff type:MM_FILEPAGES val:33 [ 42.222140] BUG: Bad rss-counter state mm:00000000db7c45ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4746' (ECDSA) to the list of known hosts. 2023/06/20 07:48:15 fuzzer started 2023/06/20 07:48:15 dialing manager at localhost:44161 2023/06/20 07:48:15 checking machine... 2023/06/20 07:48:15 checking revisions... [ 42.878123] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:48:15 testing simple program... [ 42.921401] cgroup: Unknown subsys name 'net' [ 42.959783] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:48:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000007 RDI=ffffffff8450c0ff RBP=ffff8880147a7f58 RSP=ffff8880147a7f18 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=00007f16bc811a10 R15=0000000000000000 RIP=ffffffff8153443b RFL=00000046 [---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 00007f16bd3c0900 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=00007f16bc811a10 CR3=000000000f614000 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=be455e63b37537a200000000000ae988 XMM05=e860ffc45c8588bd0000000000136428 XMM06=bdf2e299e47b49d50000000000134ea8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000000001 RSI=ffffffff86096756 RDI=ffffffff85d91630 RBP=ffff8880183c7578 RSP=ffff8880183c7418 R8 =ffffffff86096756 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d91630 R13=ffff8880183c7568 R14=ffff8880183c7561 R15=ffff8880183c7520 RIP=ffffffff8112fc27 RFL=00000202 [-------] 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 00007f33c8d3b900 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=00007ffe7f8c3000 CR3=000000000ed28000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000