syzkaller login: [ 38.883946] BUG: Bad rss-counter state mm:0000000088aaa784 type:MM_FILEPAGES val:33 [ 38.885414] BUG: Bad rss-counter state mm:0000000088aaa784 type:MM_ANONPAGES val:22 [ 38.923789] ================================================================== [ 38.924776] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.925772] Read of size 8 at addr ffff88800f0ae5c8 by task sshd/220 [ 38.926592] [ 38.926825] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.927747] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.928802] Call Trace: [ 38.929143] [ 38.929452] dump_stack_lvl+0x91/0xf0 [ 38.929982] print_report+0xcc/0x620 [ 38.930498] ? __virt_addr_valid+0x102/0x340 [ 38.931098] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.931792] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.932463] kasan_report+0xbe/0xf0 [ 38.932986] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.933637] vma_interval_tree_remove+0xc75/0xec0 [ 38.934279] vma_prepare+0xc54/0x11a0 [ 38.934798] __split_vma+0x5af/0x950 [ 38.935306] ? __pfx___split_vma+0x10/0x10 [ 38.935882] ? find_held_lock+0x2c/0x110 [ 38.936440] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.937051] ? lock_is_held_type+0x9f/0x120 [ 38.937638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.938289] ? mtree_range_walk+0x632/0x900 [ 38.938877] ? mas_walk+0x5c7/0x7c0 [ 38.939385] do_vmi_munmap+0x1f1/0x2b0 [ 38.939920] mmap_region+0x1f9/0x2660 [ 38.940439] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.940983] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.941752] ? __pfx_lock_acquire+0x10/0x10 [ 38.942324] ? __pfx_mmap_region+0x10/0x10 [ 38.942893] ? security_mmap_addr+0x7d/0xa0 [ 38.943458] ? get_unmapped_area+0x1f5/0x3f0 [ 38.944062] do_mmap+0x854/0xf00 [ 38.944533] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.945076] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.945677] ksys_mmap_pgoff+0x3af/0x500 [ 38.946231] do_syscall_64+0x3f/0x90 [ 38.946746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.947446] RIP: 0033:0x7f9e9daf0d82 [ 38.947941] 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 [ 38.950219] RSP: 002b:00007ffdf683fca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.951195] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e9daf0d82 [ 38.952277] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e9cf2a000 [ 38.953200] RBP: 00007f9e9cf2a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.954138] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653e2735d90 [ 38.955048] R13: 00007ffdf683fcc0 R14: 00007ffdf683fcf0 R15: 00007ffdf6840050 [ 38.955983] [ 38.956299] [ 38.956530] Allocated by task 213: [ 38.956987] kasan_save_stack+0x22/0x50 [ 38.957529] kasan_set_track+0x25/0x30 [ 38.958058] __kasan_slab_alloc+0x59/0x70 [ 38.958626] kmem_cache_alloc+0x16b/0x370 [ 38.959186] vm_area_dup+0x20/0x160 [ 38.959676] __split_vma+0x170/0x950 [ 38.960187] split_vma+0xc6/0x110 [ 38.960657] mprotect_fixup+0x8d2/0xb30 [ 38.961202] do_mprotect_pkey+0x87e/0xd40 [ 38.961774] __x64_sys_mprotect+0x78/0xc0 [ 38.962332] do_syscall_64+0x3f/0x90 [ 38.962848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.963536] [ 38.963783] Freed by task 213: [ 38.964206] kasan_save_stack+0x22/0x50 [ 38.964745] kasan_set_track+0x25/0x30 [ 38.965287] kasan_save_free_info+0x2b/0x50 [ 38.965856] __kasan_slab_free+0x10a/0x190 [ 38.966426] kmem_cache_free+0x10d/0x4d0 [ 38.966983] rcu_core+0x8c8/0x2860 [ 38.967457] __do_softirq+0x1b7/0x7d4 [ 38.967984] [ 38.968218] Last potentially related work creation: [ 38.968846] kasan_save_stack+0x22/0x50 [ 38.969384] __kasan_record_aux_stack+0x8e/0xa0 [ 38.969995] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.970681] remove_vma+0x139/0x170 [ 38.971172] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.971792] do_vmi_munmap+0x1f1/0x2b0 [ 38.972316] __vm_munmap+0x138/0x3a0 [ 38.972817] __x64_sys_munmap+0x59/0x80 [ 38.973348] do_syscall_64+0x3f/0x90 [ 38.973852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.974547] [ 38.974781] The buggy address belongs to the object at ffff88800f0ae570 [ 38.974781] which belongs to the cache vm_area_struct of size 168 [ 38.976378] The buggy address is located 88 bytes inside of [ 38.976378] freed 168-byte region [ffff88800f0ae570, ffff88800f0ae618) [ 38.977882] [ 38.978110] The buggy address belongs to the physical page: [ 38.978823] page:00000000daec5ea4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0ae [ 38.980020] memcg:ffff888016879e01 [ 38.980486] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.981171] page_type: 0xffffffff() [ 38.981666] raw: 0100000000000200 ffff8880087a0c80 ffffea0000370fc0 dead000000000002 [ 38.982647] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016879e01 [ 38.983641] page dumped because: kasan: bad access detected [ 38.984366] [ 38.984596] Memory state around the buggy address: [ 38.985202] ffff88800f0ae480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.986104] ffff88800f0ae500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.987017] >ffff88800f0ae580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.987926] ^ [ 38.988643] ffff88800f0ae600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 38.989561] ffff88800f0ae680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.990452] ================================================================== [ 38.992072] Disabling lock debugging due to kernel taint [ 40.993084] BUG: Bad rss-counter state mm:00000000b66e35ae type:MM_FILEPAGES val:33 [ 40.994075] BUG: Bad rss-counter state mm:00000000b66e35ae type:MM_ANONPAGES val:22 [ 41.544812] BUG: Bad rss-counter state mm:000000007b2acace type:MM_FILEPAGES val:33 [ 41.545945] BUG: Bad rss-counter state mm:000000007b2acace type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12076' (ECDSA) to the list of known hosts. 2023/06/20 18:41:27 fuzzer started 2023/06/20 18:41:27 dialing manager at localhost:36067 2023/06/20 18:41:27 checking machine... 2023/06/20 18:41:27 checking revisions... [ 42.319994] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:41:28 testing simple program... [ 42.371077] cgroup: Unknown subsys name 'net' [ 42.433088] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:41:27 Registers: info registers vcpu 0 RAX=1ffffffff0bbfc16 RBX=ffffffff85dfe0b0 RCX=ffffffff8180ca59 RDX=0000000000000000 RSI=ffffffff86138f52 RDI=ffffffff85dfe0a0 RBP=ffffffff85dfe0a0 RSP=ffff888018c3f6a0 R8 =ffffffff86138f52 R9 =ffff888018c3f798 R10=0000000000038001 R11=0000000000020db7 R12=ffffffff85dfe0c0 R13=ffffffff85dfe0a0 R14=ffffffff85dfe0a0 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007ff878095900 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=00007ffeeb9ff000 CR3=000000000f10e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff82243958 RDX=000000000000000e RSI=0000000000000000 RDI=0000000000000006 RBP=0000000000000010 RSP=ffff888008d7f938 R8 =0000000000000006 R9 =000000000000000e R10=0000000000000010 R11=0000000000000128 R12=ffff88800fde24d0 R13=0000000000000001 R14=0000607f92e15344 R15=000000000000000e RIP=ffffffff8224395c RFL=00000093 [--S-A-C] 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=0000557989550218 CR3=000000000f10e000 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=00000000000000ea00000000000f1314 XMM02=00000000000000000000000000000000 XMM03=00000000000000c900000000000f8a91 XMM04=00000000000000e200000000000f1328 XMM05=00000000000000000000000000000000 XMM06=00000000000000de00000000000f131b XMM07=00000000000000000000000000000000 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000