syzkaller login: [ 31.604472] BUG: Bad rss-counter state mm:000000005bb78e99 type:MM_FILEPAGES val:33 [ 31.605870] BUG: Bad rss-counter state mm:000000005bb78e99 type:MM_ANONPAGES val:22 [ 31.759723] ================================================================== [ 31.760636] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.761597] Read of size 8 at addr ffff88800c7ce4e0 by task sshd/220 [ 31.762377] [ 31.762601] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.763577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.764550] Call Trace: [ 31.764874] [ 31.765270] dump_stack_lvl+0x91/0xf0 [ 31.765886] print_report+0xcc/0x620 [ 31.766462] ? __virt_addr_valid+0x102/0x340 [ 31.767126] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.767867] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.768605] kasan_report+0xbe/0xf0 [ 31.769178] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.769967] vma_interval_tree_remove+0xc75/0xec0 [ 31.770613] vma_prepare+0xc54/0x11a0 [ 31.771110] __split_vma+0x5af/0x950 [ 31.771603] ? __pfx___split_vma+0x10/0x10 [ 31.772156] ? find_held_lock+0x2c/0x110 [ 31.772693] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.773277] ? lock_is_held_type+0x9f/0x120 [ 31.773847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.774475] ? mtree_range_walk+0x632/0x900 [ 31.775041] ? mas_walk+0x5c7/0x7c0 [ 31.775527] do_vmi_munmap+0x1f1/0x2b0 [ 31.776038] mmap_region+0x1f9/0x2660 [ 31.776545] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.777078] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.777834] ? __pfx_lock_acquire+0x10/0x10 [ 31.778396] ? __pfx_mmap_region+0x10/0x10 [ 31.778941] ? security_mmap_addr+0x7d/0xa0 [ 31.779497] ? get_unmapped_area+0x1f5/0x3f0 [ 31.780065] do_mmap+0x854/0xf00 [ 31.780520] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.781035] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.781614] ksys_mmap_pgoff+0x3af/0x500 [ 31.782148] do_syscall_64+0x3f/0x90 [ 31.782646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.783307] RIP: 0033:0x7ff3f6d06d82 [ 31.783781] 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 [ 31.786016] RSP: 002b:00007ffd9cdefb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.786961] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3f6d06d82 [ 31.787846] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3f6140000 [ 31.788732] RBP: 00007ff3f6140000 R08: 0000000000000009 R09: 0000000000001000 [ 31.789618] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e9ca7bb20 [ 31.790516] R13: 00007ffd9cdefb80 R14: 00007ffd9cdefbb0 R15: 00007ffd9cdeff10 [ 31.791408] [ 31.791711] [ 31.791933] Allocated by task 213: [ 31.792382] kasan_save_stack+0x22/0x50 [ 31.792894] kasan_set_track+0x25/0x30 [ 31.793404] __kasan_slab_alloc+0x59/0x70 [ 31.793956] kmem_cache_alloc+0x16b/0x370 [ 31.794497] vm_area_dup+0x20/0x160 [ 31.794968] __split_vma+0x170/0x950 [ 31.795449] split_vma+0xc6/0x110 [ 31.795900] mprotect_fixup+0x8d2/0xb30 [ 31.796427] do_mprotect_pkey+0x87e/0xd40 [ 31.796965] __x64_sys_mprotect+0x78/0xc0 [ 31.797505] do_syscall_64+0x3f/0x90 [ 31.798026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.798694] [ 31.798914] Freed by task 213: [ 31.799325] kasan_save_stack+0x22/0x50 [ 31.799843] kasan_set_track+0x25/0x30 [ 31.800353] kasan_save_free_info+0x2b/0x50 [ 31.800901] __kasan_slab_free+0x10a/0x190 [ 31.801453] kmem_cache_free+0x10d/0x4d0 [ 31.801997] rcu_core+0x8c8/0x2860 [ 31.802469] __do_softirq+0x1b7/0x7d4 [ 31.802958] [ 31.803181] Last potentially related work creation: [ 31.803788] kasan_save_stack+0x22/0x50 [ 31.804309] __kasan_record_aux_stack+0x8e/0xa0 [ 31.804899] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.805566] remove_vma+0x139/0x170 [ 31.806041] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.806628] do_vmi_munmap+0x1f1/0x2b0 [ 31.807131] __vm_munmap+0x138/0x3a0 [ 31.807617] __x64_sys_munmap+0x59/0x80 [ 31.808132] do_syscall_64+0x3f/0x90 [ 31.808626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.809291] [ 31.809511] The buggy address belongs to the object at ffff88800c7ce488 [ 31.809511] which belongs to the cache vm_area_struct of size 168 [ 31.811065] The buggy address is located 88 bytes inside of [ 31.811065] freed 168-byte region [ffff88800c7ce488, ffff88800c7ce530) [ 31.812534] [ 31.812756] The buggy address belongs to the physical page: [ 31.813436] page:00000000029e6096 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7ce [ 31.814575] memcg:ffff88800c7c9101 [ 31.815017] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.815687] page_type: 0xffffffff() [ 31.816148] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.817104] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7c9101 [ 31.818072] page dumped because: kasan: bad access detected [ 31.818759] [ 31.818986] Memory state around the buggy address: [ 31.819592] ffff88800c7ce380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.820486] ffff88800c7ce400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.821385] >ffff88800c7ce480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.822281] ^ [ 31.823064] ffff88800c7ce500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.823950] ffff88800c7ce580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.824828] ================================================================== [ 31.826002] Disabling lock debugging due to kernel taint [ 34.661938] BUG: Bad rss-counter state mm:00000000248e69e7 type:MM_FILEPAGES val:33 [ 34.663287] BUG: Bad rss-counter state mm:00000000248e69e7 type:MM_ANONPAGES val:22 [ 35.151486] BUG: Bad rss-counter state mm:000000001b980628 type:MM_FILEPAGES val:33 [ 35.152590] BUG: Bad rss-counter state mm:000000001b980628 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63719' (ECDSA) to the list of known hosts. 2023/06/19 13:49:26 fuzzer started 2023/06/19 13:49:26 dialing manager at localhost:44161 2023/06/19 13:49:26 checking machine... 2023/06/19 13:49:26 checking revisions... [ 35.873925] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:49:26 testing simple program... [ 35.925519] cgroup: Unknown subsys name 'net' [ 35.985791] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:49:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880142ef350 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff83c1fca0 RDI=ffff8880142ef35c RBP=000000000000000a RSP=ffff8880142ef268 R8 =0000000000000001 R9 =ffff8880142ef2c8 R10=0000000000038001 R11=000000000008b00b R12=ffff8880142ef350 R13=0000000000000000 R14=ffff88800d928000 R15=ffffea0000686240 RIP=ffffffff813ad4b6 RFL=00000246 [---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 00007fe04a636900 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=00007f4154827650 CR3=000000000f29a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=90b4019dbec5c9ed00000000000ae988 XMM05=6c92eb0627b3ed070000000000136380 XMM06=00c3ffa147b8d8570000000000135170 XMM07=fb795ef6d657705600000000001256e0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffe14c694a8 CR3=0000000015a2c000 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=2035323a39343a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a39343a3331203931 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000