syzkaller login: [ 30.690138] BUG: Bad rss-counter state mm:0000000024b8d989 type:MM_FILEPAGES val:33 [ 30.692429] BUG: Bad rss-counter state mm:0000000024b8d989 type:MM_ANONPAGES val:22 [ 30.856385] ================================================================== [ 30.857473] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.858599] Read of size 8 at addr ffff88801a2dd140 by task sshd/220 [ 30.859713] [ 30.859981] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.861020] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.862189] Call Trace: [ 30.862581] [ 30.862929] dump_stack_lvl+0x91/0xf0 [ 30.863549] print_report+0xcc/0x620 [ 30.864084] ? __virt_addr_valid+0x102/0x340 [ 30.864672] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865326] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865991] kasan_report+0xbe/0xf0 [ 30.866516] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.867206] vma_interval_tree_remove+0xc75/0xec0 [ 30.867890] vma_prepare+0xc54/0x11a0 [ 30.868419] __split_vma+0x5af/0x950 [ 30.868940] ? __pfx___split_vma+0x10/0x10 [ 30.869524] ? find_held_lock+0x2c/0x110 [ 30.870098] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.870726] ? lock_is_held_type+0x9f/0x120 [ 30.871326] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.872012] ? mtree_range_walk+0x632/0x900 [ 30.872626] ? mas_walk+0x5c7/0x7c0 [ 30.873151] do_vmi_munmap+0x1f1/0x2b0 [ 30.873699] mmap_region+0x1f9/0x2660 [ 30.874241] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.874807] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.875605] ? __pfx_lock_acquire+0x10/0x10 [ 30.876192] ? __pfx_mmap_region+0x10/0x10 [ 30.876777] ? security_mmap_addr+0x7d/0xa0 [ 30.877362] ? get_unmapped_area+0x1f5/0x3f0 [ 30.877973] do_mmap+0x854/0xf00 [ 30.878463] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.879010] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.879631] ksys_mmap_pgoff+0x3af/0x500 [ 30.880191] do_syscall_64+0x3f/0x90 [ 30.880723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.881443] RIP: 0033:0x7fd1fd0b3d82 [ 30.881952] 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 [ 30.884329] RSP: 002b:00007ffd57591938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.885335] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1fd0b3d82 [ 30.886275] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1fc4ed000 [ 30.887220] RBP: 00007fd1fc4ed000 R08: 0000000000000009 R09: 0000000000001000 [ 30.888182] R10: 0000000000000812 R11: 0000000000000206 R12: 000056070b9caec0 [ 30.889125] R13: 00007ffd57591950 R14: 00007ffd57591980 R15: 00007ffd57591ce0 [ 30.890082] [ 30.890408] [ 30.890642] Allocated by task 213: [ 30.891117] kasan_save_stack+0x22/0x50 [ 30.891690] kasan_set_track+0x25/0x30 [ 30.892236] __kasan_slab_alloc+0x59/0x70 [ 30.892819] kmem_cache_alloc+0x16b/0x370 [ 30.893397] vm_area_dup+0x20/0x160 [ 30.893905] __split_vma+0x170/0x950 [ 30.894425] split_vma+0xc6/0x110 [ 30.894912] mprotect_fixup+0x8d2/0xb30 [ 30.895467] do_mprotect_pkey+0x87e/0xd40 [ 30.896059] __x64_sys_mprotect+0x78/0xc0 [ 30.896643] do_syscall_64+0x3f/0x90 [ 30.897172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.897884] [ 30.898122] Freed by task 213: [ 30.898556] kasan_save_stack+0x22/0x50 [ 30.899113] kasan_set_track+0x25/0x30 [ 30.899659] kasan_save_free_info+0x2b/0x50 [ 30.900335] __kasan_slab_free+0x10a/0x190 [ 30.900925] kmem_cache_free+0x10d/0x4d0 [ 30.901487] rcu_core+0x8c8/0x2860 [ 30.901978] __do_softirq+0x1b7/0x7d4 [ 30.902503] [ 30.902745] Last potentially related work creation: [ 30.903398] kasan_save_stack+0x22/0x50 [ 30.903960] __kasan_record_aux_stack+0x8e/0xa0 [ 30.904592] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.905295] remove_vma+0x139/0x170 [ 30.905795] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.906419] do_vmi_munmap+0x1f1/0x2b0 [ 30.906953] __vm_munmap+0x138/0x3a0 [ 30.907471] __x64_sys_munmap+0x59/0x80 [ 30.908022] do_syscall_64+0x3f/0x90 [ 30.908549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.909262] [ 30.909496] The buggy address belongs to the object at ffff88801a2dd0e8 [ 30.909496] which belongs to the cache vm_area_struct of size 168 [ 30.911117] The buggy address is located 88 bytes inside of [ 30.911117] freed 168-byte region [ffff88801a2dd0e8, ffff88801a2dd190) [ 30.912684] [ 30.912924] The buggy address belongs to the physical page: [ 30.913653] page:00000000b03aa5e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2dd [ 30.914867] memcg:ffff8880166c3c01 [ 30.915346] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.916067] page_type: 0xffffffff() [ 30.916568] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.917588] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166c3c01 [ 30.918589] page dumped because: kasan: bad access detected [ 30.919318] [ 30.919568] Memory state around the buggy address: [ 30.920210] ffff88801a2dd000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.921163] ffff88801a2dd080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.922115] >ffff88801a2dd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.923063] ^ [ 30.923772] ffff88801a2dd180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.924713] ffff88801a2dd200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.925658] ================================================================== [ 30.926748] Disabling lock debugging due to kernel taint [ 33.569112] BUG: Bad rss-counter state mm:0000000095a490fc type:MM_FILEPAGES val:33 [ 33.570322] BUG: Bad rss-counter state mm:0000000095a490fc type:MM_ANONPAGES val:22 [ 34.007969] BUG: Bad rss-counter state mm:00000000646bba8c type:MM_FILEPAGES val:33 [ 34.009313] BUG: Bad rss-counter state mm:00000000646bba8c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38455' (ECDSA) to the list of known hosts. 2023/06/21 10:30:09 fuzzer started 2023/06/21 10:30:10 dialing manager at localhost:36067 2023/06/21 10:30:10 checking machine... 2023/06/21 10:30:10 checking revisions... [ 34.695787] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:30:10 testing simple program... [ 34.751581] cgroup: Unknown subsys name 'net' [ 34.805047] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:30:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800e7ffb50 RCX=0000000000000001 RDX=1ffff11001cffea5 RSI=ffff88800e7ffb28 RDI=ffff88800e7ff528 RBP=ffff88800e7ffe60 RSP=ffff88800e7ff4b0 R8 =0000000000000001 R9 =ffff88800e7ff560 R10=0000000000038001 R11=000000000008a835 R12=ffff88800e7ff580 R13=ffff88800e7ff568 R14=ffff88800e7ffb28 R15=ffff88800e7ff520 RIP=ffffffff81131c83 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 00007f1c8ce0d700 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=00007f77c2ae20b0 CR3=000000000f116000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732039303a3033 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383133 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f8b77731a80 CR3=000000000d656000 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=00000000000000000000000000000000 XMM01=271de988ed7cb4b5e046b0f34c412a2e XMM02=2c67c8bc2e329bc300000000001199e8 XMM03=fb795ef6d65770560000000000121218 XMM04=bcc5bfb2ea15360200000000000ae988 XMM05=19e9129bd510f2350000000000131088 XMM06=ff55730c0dee06a0000000000012f788 XMM07=e042d86d42eb936e0000000000121498 XMM08=6c299bd2c1d682d10000000000119a48 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000