syzkaller login: [ 31.588487] BUG: Bad rss-counter state mm:00000000030b5aaa type:MM_FILEPAGES val:33 [ 31.589711] BUG: Bad rss-counter state mm:00000000030b5aaa type:MM_ANONPAGES val:22 [ 31.741701] ================================================================== [ 31.742778] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.743689] Read of size 8 at addr ffff888016e07228 by task sshd/220 [ 31.744540] [ 31.744750] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.745645] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.746600] Call Trace: [ 31.746910] [ 31.747204] dump_stack_lvl+0x91/0xf0 [ 31.747679] print_report+0xcc/0x620 [ 31.748149] ? __virt_addr_valid+0x102/0x340 [ 31.748681] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.749279] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.749880] kasan_report+0xbe/0xf0 [ 31.750363] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.750971] vma_interval_tree_remove+0xc75/0xec0 [ 31.751559] vma_prepare+0xc54/0x11a0 [ 31.752028] __split_vma+0x5af/0x950 [ 31.752485] ? __pfx___split_vma+0x10/0x10 [ 31.753011] ? find_held_lock+0x2c/0x110 [ 31.753528] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.754081] ? lock_is_held_type+0x9f/0x120 [ 31.754611] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.755219] ? mtree_range_walk+0x632/0x900 [ 31.755760] ? mas_walk+0x5c7/0x7c0 [ 31.756227] do_vmi_munmap+0x1f1/0x2b0 [ 31.756708] mmap_region+0x1f9/0x2660 [ 31.757179] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.757686] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.758404] ? __pfx_lock_acquire+0x10/0x10 [ 31.758918] ? __pfx_mmap_region+0x10/0x10 [ 31.759442] ? security_mmap_addr+0x7d/0xa0 [ 31.759965] ? get_unmapped_area+0x1f5/0x3f0 [ 31.760508] do_mmap+0x854/0xf00 [ 31.760937] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.761422] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.761972] ksys_mmap_pgoff+0x3af/0x500 [ 31.762487] do_syscall_64+0x3f/0x90 [ 31.762963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.763599] RIP: 0033:0x7fca791f2d82 [ 31.764049] 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 [ 31.766170] RSP: 002b:00007ffcd763d5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.767070] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca791f2d82 [ 31.767916] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca7862c000 [ 31.768757] RBP: 00007fca7862c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.769600] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7cd38aec0 [ 31.770446] R13: 00007ffcd763d5f0 R14: 00007ffcd763d620 R15: 00007ffcd763d980 [ 31.771284] [ 31.771570] [ 31.771786] Allocated by task 213: [ 31.772211] kasan_save_stack+0x22/0x50 [ 31.772715] kasan_set_track+0x25/0x30 [ 31.773193] __kasan_slab_alloc+0x59/0x70 [ 31.773708] kmem_cache_alloc+0x16b/0x370 [ 31.774223] vm_area_dup+0x20/0x160 [ 31.774669] __split_vma+0x170/0x950 [ 31.775119] split_vma+0xc6/0x110 [ 31.775551] mprotect_fixup+0x8d2/0xb30 [ 31.776040] do_mprotect_pkey+0x87e/0xd40 [ 31.776543] __x64_sys_mprotect+0x78/0xc0 [ 31.777050] do_syscall_64+0x3f/0x90 [ 31.777514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.778167] [ 31.778378] Freed by task 19: [ 31.778768] kasan_save_stack+0x22/0x50 [ 31.779266] kasan_set_track+0x25/0x30 [ 31.779745] kasan_save_free_info+0x2b/0x50 [ 31.780265] __kasan_slab_free+0x10a/0x190 [ 31.780779] kmem_cache_free+0x10d/0x4d0 [ 31.781274] rcu_core+0x8c8/0x2860 [ 31.781708] __do_softirq+0x1b7/0x7d4 [ 31.782205] [ 31.782417] Last potentially related work creation: [ 31.783000] kasan_save_stack+0x22/0x50 [ 31.783492] __kasan_record_aux_stack+0x8e/0xa0 [ 31.784051] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.784684] remove_vma+0x139/0x170 [ 31.785125] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.785673] do_vmi_munmap+0x1f1/0x2b0 [ 31.786175] __vm_munmap+0x138/0x3a0 [ 31.786652] __x64_sys_munmap+0x59/0x80 [ 31.787145] do_syscall_64+0x3f/0x90 [ 31.787608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.788240] [ 31.788451] The buggy address belongs to the object at ffff888016e071d0 [ 31.788451] which belongs to the cache vm_area_struct of size 168 [ 31.789886] The buggy address is located 88 bytes inside of [ 31.789886] freed 168-byte region [ffff888016e071d0, ffff888016e07278) [ 31.791268] [ 31.791476] The buggy address belongs to the physical page: [ 31.792137] page:00000000a9bafdf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e07 [ 31.793291] memcg:ffff888019917801 [ 31.793745] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.794444] page_type: 0xffffffff() [ 31.794921] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.795916] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019917801 [ 31.796888] page dumped because: kasan: bad access detected [ 31.797604] [ 31.797823] Memory state around the buggy address: [ 31.798419] ffff888016e07100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.799292] ffff888016e07180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.800174] >ffff888016e07200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.801051] ^ [ 31.801614] ffff888016e07280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.802508] ffff888016e07300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.803387] ================================================================== [ 31.804348] Disabling lock debugging due to kernel taint [ 34.082302] BUG: Bad rss-counter state mm:00000000a8fc52dc type:MM_FILEPAGES val:33 [ 34.083533] BUG: Bad rss-counter state mm:00000000a8fc52dc type:MM_ANONPAGES val:22 [ 34.579505] BUG: Bad rss-counter state mm:000000009a325d15 type:MM_FILEPAGES val:33 [ 34.580706] BUG: Bad rss-counter state mm:000000009a325d15 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4354' (ECDSA) to the list of known hosts. 2023/06/20 21:18:07 fuzzer started 2023/06/20 21:18:07 dialing manager at localhost:36067 2023/06/20 21:18:07 checking machine... 2023/06/20 21:18:07 checking revisions... [ 35.345107] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:18:07 testing simple program... [ 35.401147] cgroup: Unknown subsys name 'net' [ 35.457051] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:18:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fe9df3b6fef RCX=ffffffff81007b62 RDX=ffff888015d0d1c0 RSI=0000000000000001 RDI=0000000000000002 RBP=0000000000000001 RSP=ffff888018467438 R8 =ffffffff864bbb58 R9 =ffff8880184674f8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888018467580 R13=0000000000000000 R14=ffff888015d0d1c0 R15=0000000000000000 RIP=ffffffff814c0408 RFL=00000293 [--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 00007fe9de573700 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=00007f053b3f8840 CR3=000000000e54e000 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=2036303a38313a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a38313a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f0f3d67b0b0 CR3=000000000e54e000 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=38313a3132203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363831 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000