syzkaller login: [ 30.345628] BUG: Bad rss-counter state mm:00000000c67fe6f4 type:MM_FILEPAGES val:33 [ 30.346803] BUG: Bad rss-counter state mm:00000000c67fe6f4 type:MM_ANONPAGES val:22 [ 30.387833] ================================================================== [ 30.388851] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.389915] Read of size 8 at addr ffff88801686edf0 by task sshd/221 [ 30.390795] [ 30.391051] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.392049] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.393156] Call Trace: [ 30.393489] [ 30.393769] dump_stack_lvl+0x91/0xf0 [ 30.394394] print_report+0xcc/0x620 [ 30.394880] ? __virt_addr_valid+0x102/0x340 [ 30.395471] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.396084] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.396719] kasan_report+0xbe/0xf0 [ 30.397199] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.397952] vma_interval_tree_remove+0xc75/0xec0 [ 30.398621] vma_prepare+0xc54/0x11a0 [ 30.399102] __split_vma+0x5af/0x950 [ 30.399612] ? __pfx___split_vma+0x10/0x10 [ 30.400220] ? find_held_lock+0x2c/0x110 [ 30.400793] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.401358] ? lock_is_held_type+0x9f/0x120 [ 30.401949] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.402612] ? mtree_range_walk+0x632/0x900 [ 30.403153] ? mas_walk+0x5c7/0x7c0 [ 30.403734] do_vmi_munmap+0x1f1/0x2b0 [ 30.404299] mmap_region+0x1f9/0x2660 [ 30.404905] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.405495] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.406199] ? __pfx_lock_acquire+0x10/0x10 [ 30.406753] ? __pfx_mmap_region+0x10/0x10 [ 30.407302] ? security_mmap_addr+0x7d/0xa0 [ 30.407852] ? get_unmapped_area+0x1f5/0x3f0 [ 30.408409] do_mmap+0x854/0xf00 [ 30.408848] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.409340] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.409916] ksys_mmap_pgoff+0x3af/0x500 [ 30.410436] do_syscall_64+0x3f/0x90 [ 30.410915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.411591] RIP: 0033:0x7fbb6662bd82 [ 30.412044] 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 [ 30.414162] RSP: 002b:00007ffea415a6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.415073] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb6662bd82 [ 30.416127] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb65a65000 [ 30.417004] RBP: 00007fbb65a65000 R08: 0000000000000009 R09: 0000000000001000 [ 30.417855] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d416d0f70 [ 30.418706] R13: 00007ffea415a6f0 R14: 00007ffea415a720 R15: 00007ffea415aa80 [ 30.419582] [ 30.419874] [ 30.420085] Allocated by task 214: [ 30.420527] kasan_save_stack+0x22/0x50 [ 30.421029] kasan_set_track+0x25/0x30 [ 30.421546] __kasan_slab_alloc+0x59/0x70 [ 30.422068] kmem_cache_alloc+0x16b/0x370 [ 30.422592] vm_area_dup+0x20/0x160 [ 30.423041] __split_vma+0x170/0x950 [ 30.423529] split_vma+0xc6/0x110 [ 30.423974] mprotect_fixup+0x8d2/0xb30 [ 30.424493] do_mprotect_pkey+0x87e/0xd40 [ 30.425029] __x64_sys_mprotect+0x78/0xc0 [ 30.425713] do_syscall_64+0x3f/0x90 [ 30.426344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.427192] [ 30.427490] Freed by task 214: [ 30.427984] kasan_save_stack+0x22/0x50 [ 30.428625] kasan_set_track+0x25/0x30 [ 30.429254] kasan_save_free_info+0x2b/0x50 [ 30.429927] __kasan_slab_free+0x10a/0x190 [ 30.430608] kmem_cache_free+0x10d/0x4d0 [ 30.431246] rcu_core+0x8c8/0x2860 [ 30.431808] __do_softirq+0x1b7/0x7d4 [ 30.432412] [ 30.432687] Last potentially related work creation: [ 30.433338] kasan_save_stack+0x22/0x50 [ 30.433856] __kasan_record_aux_stack+0x8e/0xa0 [ 30.434444] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.435081] remove_vma+0x139/0x170 [ 30.435554] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.436110] do_vmi_munmap+0x1f1/0x2b0 [ 30.436604] __vm_munmap+0x138/0x3a0 [ 30.437070] __x64_sys_munmap+0x59/0x80 [ 30.437594] do_syscall_64+0x3f/0x90 [ 30.438067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.438720] [ 30.438936] The buggy address belongs to the object at ffff88801686ed98 [ 30.438936] which belongs to the cache vm_area_struct of size 168 [ 30.440439] The buggy address is located 88 bytes inside of [ 30.440439] freed 168-byte region [ffff88801686ed98, ffff88801686ee40) [ 30.441862] [ 30.442076] The buggy address belongs to the physical page: [ 30.442738] page:000000002c115dea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1686e [ 30.443849] memcg:ffff88800fdb0301 [ 30.444277] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.444935] page_type: 0xffffffff() [ 30.445394] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.446311] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdb0301 [ 30.447262] page dumped because: kasan: bad access detected [ 30.447939] [ 30.448157] Memory state around the buggy address: [ 30.448744] ffff88801686ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.449600] ffff88801686ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.450463] >ffff88801686ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.451337] ^ [ 30.452165] ffff88801686ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.453024] ffff88801686ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.453884] ================================================================== [ 30.455045] Disabling lock debugging due to kernel taint [ 32.512588] BUG: Bad rss-counter state mm:00000000f2835f9a type:MM_FILEPAGES val:33 [ 32.513689] BUG: Bad rss-counter state mm:00000000f2835f9a type:MM_ANONPAGES val:22 [ 32.995310] BUG: Bad rss-counter state mm:000000002b35995e type:MM_FILEPAGES val:33 [ 32.996458] BUG: Bad rss-counter state mm:000000002b35995e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53550' (ECDSA) to the list of known hosts. 2023/06/20 01:01:44 fuzzer started 2023/06/20 01:01:44 dialing manager at localhost:44161 2023/06/20 01:01:44 checking machine... 2023/06/20 01:01:44 checking revisions... [ 33.709182] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:01:44 testing simple program... [ 33.745702] cgroup: Unknown subsys name 'net' [ 33.798909] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:01:44 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88801ca17d60 RSI=ffff88801ca17d48 RDI=ffff88801ca178d8 RBP=ffff88801ca10000 RSP=ffff88801ca17898 R8 =0000000000000001 R9 =ffff88801ca17908 R10=0000000000038001 R11=0000000000020c48 R12=ffff88801ca17928 R13=ffff88801ca17910 R14=ffff88801ca17d48 R15=ffff88801ca178c8 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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 00007ff0eb917900 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=00007ff0ebecf0b0 CR3=00000000095c2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c58400 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=00007f3303f7c280 CR3=000000000c6cc000 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=df1941b20b7704831a4e082085623f11 XMM02=000000000011d388ec2efd57dc4c00df XMM03=00000000001239b8deb50aa255652dbf XMM04=935b06ebdfaa43a600000000000ae988 XMM05=e4cb8bb95a7664b60000000000133830 XMM06=b09dfa90698aedf00000000000132698 XMM07=e042d86d42eb936e0000000000123c38 XMM08=deb50aa255652dbf000000000011d3e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000