syzkaller login: [ 62.479105] BUG: Bad rss-counter state mm:00000000505d4b00 type:MM_FILEPAGES val:33 [ 62.479937] BUG: Bad rss-counter state mm:00000000505d4b00 type:MM_ANONPAGES val:22 [ 62.512977] ================================================================== [ 62.513889] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.514827] Read of size 8 at addr ffff88800e904b38 by task sshd/222 [ 62.515665] [ 62.515894] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.516754] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.517731] Call Trace: [ 62.518052] [ 62.518333] dump_stack_lvl+0x91/0xf0 [ 62.518821] print_report+0xcc/0x620 [ 62.519302] ? __virt_addr_valid+0x102/0x340 [ 62.519855] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.520475] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.521086] kasan_report+0xbe/0xf0 [ 62.521567] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.522181] vma_interval_tree_remove+0xc75/0xec0 [ 62.522782] vma_prepare+0xc54/0x11a0 [ 62.523261] __split_vma+0x5af/0x950 [ 62.523729] ? __pfx___split_vma+0x10/0x10 [ 62.524278] ? find_held_lock+0x2c/0x110 [ 62.524798] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.525360] ? lock_is_held_type+0x9f/0x120 [ 62.525899] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.526498] ? mtree_range_walk+0x632/0x900 [ 62.527046] ? mas_walk+0x5c7/0x7c0 [ 62.527522] do_vmi_munmap+0x1f1/0x2b0 [ 62.528020] mmap_region+0x1f9/0x2660 [ 62.528497] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.529007] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.529722] ? __pfx_lock_acquire+0x10/0x10 [ 62.530254] ? __pfx_mmap_region+0x10/0x10 [ 62.530792] ? security_mmap_addr+0x7d/0xa0 [ 62.531324] ? get_unmapped_area+0x1f5/0x3f0 [ 62.531880] do_mmap+0x854/0xf00 [ 62.532320] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.532821] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.533389] ksys_mmap_pgoff+0x3af/0x500 [ 62.533897] do_syscall_64+0x3f/0x90 [ 62.534370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.535028] RIP: 0033:0x7fa484890d82 [ 62.535489] 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 [ 62.537616] RSP: 002b:00007ffd9861adf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.538517] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa484890d82 [ 62.539362] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa483cca000 [ 62.540219] RBP: 00007fa483cca000 R08: 0000000000000009 R09: 0000000000001000 [ 62.541064] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561dace09ec0 [ 62.541905] R13: 00007ffd9861ae10 R14: 00007ffd9861ae40 R15: 00007ffd9861b1a0 [ 62.542754] [ 62.543046] [ 62.543262] Allocated by task 215: [ 62.543695] kasan_save_stack+0x22/0x50 [ 62.544210] kasan_set_track+0x25/0x30 [ 62.544706] __kasan_slab_alloc+0x59/0x70 [ 62.545233] kmem_cache_alloc+0x16b/0x370 [ 62.545754] vm_area_dup+0x20/0x160 [ 62.546211] __split_vma+0x170/0x950 [ 62.546674] split_vma+0xc6/0x110 [ 62.547110] mprotect_fixup+0x8d2/0xb30 [ 62.547613] do_mprotect_pkey+0x87e/0xd40 [ 62.548136] __x64_sys_mprotect+0x78/0xc0 [ 62.548655] do_syscall_64+0x3f/0x90 [ 62.549125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.549763] [ 62.549976] Freed by task 215: [ 62.550363] kasan_save_stack+0x22/0x50 [ 62.550865] kasan_set_track+0x25/0x30 [ 62.551356] kasan_save_free_info+0x2b/0x50 [ 62.551907] __kasan_slab_free+0x10a/0x190 [ 62.552440] kmem_cache_free+0x10d/0x4d0 [ 62.552947] rcu_core+0x8c8/0x2860 [ 62.553387] __do_softirq+0x1b7/0x7d4 [ 62.553893] [ 62.554113] Last potentially related work creation: [ 62.554700] kasan_save_stack+0x22/0x50 [ 62.555209] __kasan_record_aux_stack+0x8e/0xa0 [ 62.555793] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.556439] remove_vma+0x139/0x170 [ 62.556896] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.557457] do_vmi_munmap+0x1f1/0x2b0 [ 62.557946] __vm_munmap+0x138/0x3a0 [ 62.558420] __x64_sys_munmap+0x59/0x80 [ 62.558933] do_syscall_64+0x3f/0x90 [ 62.559410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.560057] [ 62.560270] The buggy address belongs to the object at ffff88800e904ae0 [ 62.560270] which belongs to the cache vm_area_struct of size 168 [ 62.561740] The buggy address is located 88 bytes inside of [ 62.561740] freed 168-byte region [ffff88800e904ae0, ffff88800e904b88) [ 62.563130] [ 62.563343] The buggy address belongs to the physical page: [ 62.564019] page:00000000a7a1c335 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe904 [ 62.565089] memcg:ffff88800c83a901 [ 62.565519] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.566164] page_type: 0xffffffff() [ 62.566613] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.567522] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c83a901 [ 62.568441] page dumped because: kasan: bad access detected [ 62.569109] [ 62.569325] Memory state around the buggy address: [ 62.569906] ffff88800e904a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.570752] ffff88800e904a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 62.571602] >ffff88800e904b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.572455] ^ [ 62.573061] ffff88800e904b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 62.573905] ffff88800e904c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 62.574749] ================================================================== [ 62.575888] Disabling lock debugging due to kernel taint [ 64.497703] BUG: Bad rss-counter state mm:00000000e107faca type:MM_FILEPAGES val:33 [ 64.498965] BUG: Bad rss-counter state mm:00000000e107faca type:MM_ANONPAGES val:22 [ 64.991724] BUG: Bad rss-counter state mm:000000004dc79eec type:MM_FILEPAGES val:33 [ 64.993000] BUG: Bad rss-counter state mm:000000004dc79eec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56068' (ECDSA) to the list of known hosts. 2023/06/19 16:48:26 fuzzer started 2023/06/19 16:48:26 dialing manager at localhost:44161 2023/06/19 16:48:26 checking machine... 2023/06/19 16:48:26 checking revisions... [ 65.759022] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:48:26 testing simple program... [ 65.812497] cgroup: Unknown subsys name 'net' [ 65.870890] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:48:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880103e1b40 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff8880147472a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000000200 RIP=ffffffff814c0380 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 00007fb3de8b6900 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=00007fb3ddce8ee0 CR3=000000000ea40000 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=03690f8cd53e7d0700000000000ae988 XMM05=9273a6962273fe350000000000135a80 XMM06=00c3ffa147b8d8570000000000134870 XMM07=fb795ef6d65770560000000000125030 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000031 RCX=ffffffff81f59002 RDX=ffff888016628000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880090d5800 RSP=ffff88800d86fa88 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff888008e1c0d8 R13=0000000000000002 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff814c01fc 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 00007f7bab699900 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=00005640d028e954 CR3=0000000016678000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000