syzkaller login: [ 35.758014] BUG: Bad rss-counter state mm:00000000f80f8a26 type:MM_FILEPAGES val:33 [ 35.759715] BUG: Bad rss-counter state mm:00000000f80f8a26 type:MM_ANONPAGES val:22 [ 35.930477] ================================================================== [ 35.931393] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.932329] Read of size 8 at addr ffff8880183d64e0 by task sshd/218 [ 35.933243] [ 35.933460] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.934324] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.935326] Call Trace: [ 35.935646] [ 35.935933] dump_stack_lvl+0x91/0xf0 [ 35.936419] print_report+0xcc/0x620 [ 35.936898] ? __virt_addr_valid+0x102/0x340 [ 35.937450] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.938071] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.938696] kasan_report+0xbe/0xf0 [ 35.939181] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.939796] vma_interval_tree_remove+0xc75/0xec0 [ 35.940398] vma_prepare+0xc54/0x11a0 [ 35.940878] __split_vma+0x5af/0x950 [ 35.941346] ? __pfx___split_vma+0x10/0x10 [ 35.941869] ? find_held_lock+0x2c/0x110 [ 35.942401] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.942960] ? lock_is_held_type+0x9f/0x120 [ 35.943501] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.944119] ? mtree_range_walk+0x632/0x900 [ 35.944670] ? mas_walk+0x5c7/0x7c0 [ 35.945148] do_vmi_munmap+0x1f1/0x2b0 [ 35.945635] mmap_region+0x1f9/0x2660 [ 35.946120] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.946648] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.947378] ? __pfx_lock_acquire+0x10/0x10 [ 35.947921] ? __pfx_mmap_region+0x10/0x10 [ 35.948455] ? security_mmap_addr+0x7d/0xa0 [ 35.948980] ? get_unmapped_area+0x1f5/0x3f0 [ 35.949532] do_mmap+0x854/0xf00 [ 35.949976] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.950489] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.951059] ksys_mmap_pgoff+0x3af/0x500 [ 35.951568] do_syscall_64+0x3f/0x90 [ 35.952053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.952700] RIP: 0033:0x7fe734eb5d82 [ 35.953164] 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 [ 35.955282] RSP: 002b:00007ffc35f0dab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.956185] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe734eb5d82 [ 35.957033] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe7342ef000 [ 35.957883] RBP: 00007fe7342ef000 R08: 0000000000000009 R09: 0000000000001000 [ 35.958738] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571a1388ec0 [ 35.959588] R13: 00007ffc35f0dad0 R14: 00007ffc35f0db00 R15: 00007ffc35f0de60 [ 35.960449] [ 35.960743] [ 35.960958] Allocated by task 211: [ 35.961394] kasan_save_stack+0x22/0x50 [ 35.961902] kasan_set_track+0x25/0x30 [ 35.962407] __kasan_slab_alloc+0x59/0x70 [ 35.962937] kmem_cache_alloc+0x16b/0x370 [ 35.963448] vm_area_dup+0x20/0x160 [ 35.963906] __split_vma+0x170/0x950 [ 35.964376] split_vma+0xc6/0x110 [ 35.964824] mprotect_fixup+0x8d2/0xb30 [ 35.965330] do_mprotect_pkey+0x87e/0xd40 [ 35.965852] __x64_sys_mprotect+0x78/0xc0 [ 35.966376] do_syscall_64+0x3f/0x90 [ 35.966876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.967516] [ 35.967732] Freed by task 211: [ 35.968125] kasan_save_stack+0x22/0x50 [ 35.968627] kasan_set_track+0x25/0x30 [ 35.969133] kasan_save_free_info+0x2b/0x50 [ 35.969662] __kasan_slab_free+0x10a/0x190 [ 35.970189] kmem_cache_free+0x10d/0x4d0 [ 35.970703] rcu_core+0x8c8/0x2860 [ 35.971148] __do_softirq+0x1b7/0x7d4 [ 35.971622] [ 35.971839] Last potentially related work creation: [ 35.972420] kasan_save_stack+0x22/0x50 [ 35.972924] __kasan_record_aux_stack+0x8e/0xa0 [ 35.973499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.974151] remove_vma+0x139/0x170 [ 35.974611] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.975182] do_vmi_munmap+0x1f1/0x2b0 [ 35.975675] __vm_munmap+0x138/0x3a0 [ 35.976156] __x64_sys_munmap+0x59/0x80 [ 35.976653] do_syscall_64+0x3f/0x90 [ 35.977129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.977800] [ 35.978017] The buggy address belongs to the object at ffff8880183d6488 [ 35.978017] which belongs to the cache vm_area_struct of size 168 [ 35.979519] The buggy address is located 88 bytes inside of [ 35.979519] freed 168-byte region [ffff8880183d6488, ffff8880183d6530) [ 35.980932] [ 35.981148] The buggy address belongs to the physical page: [ 35.981809] page:0000000040636e43 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183d6 [ 35.982911] memcg:ffff88801a10f901 [ 35.983345] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.984047] page_type: 0xffffffff() [ 35.984495] raw: 0100000000000200 ffff8880087a0c80 ffffea00003672c0 dead000000000003 [ 35.985417] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a10f901 [ 35.986343] page dumped because: kasan: bad access detected [ 35.987013] [ 35.987234] Memory state around the buggy address: [ 35.987815] ffff8880183d6380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.988677] ffff8880183d6400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.989544] >ffff8880183d6480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.990416] ^ [ 35.991187] ffff8880183d6500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 35.992056] ffff8880183d6580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.992911] ================================================================== [ 35.993878] Disabling lock debugging due to kernel taint [ 37.751529] BUG: Bad rss-counter state mm:0000000011a1ea69 type:MM_FILEPAGES val:33 [ 37.752546] BUG: Bad rss-counter state mm:0000000011a1ea69 type:MM_ANONPAGES val:22 [ 38.321436] BUG: Bad rss-counter state mm:000000003fbeba9f type:MM_FILEPAGES val:33 [ 38.322583] BUG: Bad rss-counter state mm:000000003fbeba9f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2872' (ECDSA) to the list of known hosts. 2023/06/20 22:21:48 fuzzer started 2023/06/20 22:21:48 dialing manager at localhost:36067 2023/06/20 22:21:48 checking machine... 2023/06/20 22:21:48 checking revisions... [ 38.960562] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:21:48 testing simple program... [ 39.017328] cgroup: Unknown subsys name 'net' [ 39.058484] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:21:48 Registers: info registers vcpu 0 RAX=ffff88801627dd60 RBX=1ffff11002d41fb4 RCX=0000000000000000 RDX=ffff888019f98000 RSI=ffffffff818d4f44 RDI=ffffffff84d2eca8 RBP=ffff888008c14aa0 RSP=ffff888016a0fd98 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=ffff888019addcc0 R14=ffffffff84d2fb80 R15=ffff888008c14aa8 RIP=ffffffff8186d3f5 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 00007feb924ea900 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=00007feb92a9f650 CR3=000000000ea5a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800eff0000 RSI=ffffffff81970c16 RDI=0000000000000005 RBP=0000000000000504 RSP=ffff888016f8f588 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880163059f8 R13=0000000000000000 R14=ffff8880163059f8 R15=0000000000000504 RIP=ffffffff814c089b 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fca66dd3700 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=00007f9e8eb924a0 CR3=000000000da3a000 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=2037343a31323a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a31323a3232203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000