syzkaller login: [ 29.210268] BUG: Bad rss-counter state mm:000000004df8587a type:MM_FILEPAGES val:33 [ 29.211520] BUG: Bad rss-counter state mm:000000004df8587a type:MM_ANONPAGES val:22 [ 29.248879] ================================================================== [ 29.249928] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.250903] Read of size 8 at addr ffff888019aab3f8 by task sshd/220 [ 29.251668] [ 29.251892] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.252774] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.253750] Call Trace: [ 29.254085] [ 29.254373] dump_stack_lvl+0x91/0xf0 [ 29.254872] print_report+0xcc/0x620 [ 29.255351] ? __virt_addr_valid+0x102/0x340 [ 29.255910] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.256525] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.257153] kasan_report+0xbe/0xf0 [ 29.257630] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.258280] vma_interval_tree_remove+0xc75/0xec0 [ 29.258880] vma_prepare+0xc54/0x11a0 [ 29.259365] __split_vma+0x5af/0x950 [ 29.259845] ? __pfx___split_vma+0x10/0x10 [ 29.260387] ? find_held_lock+0x2c/0x110 [ 29.260922] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.261492] ? lock_is_held_type+0x9f/0x120 [ 29.262060] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.262673] ? mtree_range_walk+0x632/0x900 [ 29.263240] ? mas_walk+0x5c7/0x7c0 [ 29.263721] do_vmi_munmap+0x1f1/0x2b0 [ 29.264213] mmap_region+0x1f9/0x2660 [ 29.264701] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.265219] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.265935] ? __pfx_lock_acquire+0x10/0x10 [ 29.266485] ? __pfx_mmap_region+0x10/0x10 [ 29.267037] ? security_mmap_addr+0x7d/0xa0 [ 29.267573] ? get_unmapped_area+0x1f5/0x3f0 [ 29.268125] do_mmap+0x854/0xf00 [ 29.268565] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.269068] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.269631] ksys_mmap_pgoff+0x3af/0x500 [ 29.270150] do_syscall_64+0x3f/0x90 [ 29.270630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.271275] RIP: 0033:0x7f336b772d82 [ 29.271738] 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 [ 29.273855] RSP: 002b:00007ffc9cac8ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.274778] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f336b772d82 [ 29.275638] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f336abac000 [ 29.276497] RBP: 00007f336abac000 R08: 0000000000000009 R09: 0000000000001000 [ 29.277479] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eafcbefec0 [ 29.278341] R13: 00007ffc9cac8bc0 R14: 00007ffc9cac8bf0 R15: 00007ffc9cac8f50 [ 29.279218] [ 29.279512] [ 29.279727] Allocated by task 213: [ 29.280157] kasan_save_stack+0x22/0x50 [ 29.280666] kasan_set_track+0x25/0x30 [ 29.281165] __kasan_slab_alloc+0x59/0x70 [ 29.281685] kmem_cache_alloc+0x16b/0x370 [ 29.282219] vm_area_dup+0x20/0x160 [ 29.282676] __split_vma+0x170/0x950 [ 29.283143] split_vma+0xc6/0x110 [ 29.283581] mprotect_fixup+0x8d2/0xb30 [ 29.284081] do_mprotect_pkey+0x87e/0xd40 [ 29.284612] __x64_sys_mprotect+0x78/0xc0 [ 29.285128] do_syscall_64+0x3f/0x90 [ 29.285598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.286305] [ 29.286520] Freed by task 213: [ 29.286918] kasan_save_stack+0x22/0x50 [ 29.287423] kasan_set_track+0x25/0x30 [ 29.287918] kasan_save_free_info+0x2b/0x50 [ 29.288456] __kasan_slab_free+0x10a/0x190 [ 29.288996] kmem_cache_free+0x10d/0x4d0 [ 29.289506] rcu_core+0x8c8/0x2860 [ 29.289959] __do_softirq+0x1b7/0x7d4 [ 29.290463] [ 29.290678] Last potentially related work creation: [ 29.291263] kasan_save_stack+0x22/0x50 [ 29.291771] __kasan_record_aux_stack+0x8e/0xa0 [ 29.292348] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.292995] remove_vma+0x139/0x170 [ 29.293455] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.294019] do_vmi_munmap+0x1f1/0x2b0 [ 29.294502] __vm_munmap+0x138/0x3a0 [ 29.294975] __x64_sys_munmap+0x59/0x80 [ 29.295473] do_syscall_64+0x3f/0x90 [ 29.295956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.296597] [ 29.296821] The buggy address belongs to the object at ffff888019aab3a0 [ 29.296821] which belongs to the cache vm_area_struct of size 168 [ 29.298303] The buggy address is located 88 bytes inside of [ 29.298303] freed 168-byte region [ffff888019aab3a0, ffff888019aab448) [ 29.299718] [ 29.299941] The buggy address belongs to the physical page: [ 29.300599] page:000000000abc11f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19aab [ 29.301692] memcg:ffff88801437e401 [ 29.302140] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.302792] page_type: 0xffffffff() [ 29.303241] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.304175] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801437e401 [ 29.305083] page dumped because: kasan: bad access detected [ 29.305747] [ 29.305964] Memory state around the buggy address: [ 29.306558] ffff888019aab280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 29.307423] ffff888019aab300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 29.308282] >ffff888019aab380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.309142] ^ [ 29.310007] ffff888019aab400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.310860] ffff888019aab480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.311721] ================================================================== [ 29.312965] Disabling lock debugging due to kernel taint [ 31.481762] BUG: Bad rss-counter state mm:00000000871a553a type:MM_FILEPAGES val:33 [ 31.482938] BUG: Bad rss-counter state mm:00000000871a553a type:MM_ANONPAGES val:22 [ 31.884093] BUG: Bad rss-counter state mm:000000008dd5b989 type:MM_FILEPAGES val:33 [ 31.884936] BUG: Bad rss-counter state mm:000000008dd5b989 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5826' (ECDSA) to the list of known hosts. 2023/06/20 03:43:11 fuzzer started 2023/06/20 03:43:12 dialing manager at localhost:44161 2023/06/20 03:43:12 checking machine... 2023/06/20 03:43:12 checking revisions... [ 32.542347] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:43:12 testing simple program... [ 32.594378] cgroup: Unknown subsys name 'net' [ 32.637141] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:43:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880193bb681 RCX=ffffffff812bd93d RDX=1ffff11001ba239f RSI=0000000000000008 RDI=ffff88800dd11cf8 RBP=ffff88800dd11cf0 RSP=ffff88800f1cfb68 R8 =0000000000000001 R9 =ffffed1001ba239f R10=ffff88800dd11cff R11=0000000000000000 R12=1ffff11001e39f6e R13=ffff88800dd11cf8 R14=0000000000000001 R15=ffff8880193bb680 RIP=ffffffff812bd95c 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 00007f744b639900 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=00007f744b608008 CR3=0000000016bd6000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007ff8289efab0 CR3=000000000e81e000 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=2031313a33343a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a33343a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000