syzkaller login: [ 30.859075] BUG: Bad rss-counter state mm:0000000023275c8b type:MM_FILEPAGES val:33 [ 30.860190] BUG: Bad rss-counter state mm:0000000023275c8b type:MM_ANONPAGES val:22 [ 30.904730] ================================================================== [ 30.905803] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.906810] Read of size 8 at addr ffff8880162a6058 by task sshd/221 [ 30.907686] [ 30.907902] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.908845] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.909948] Call Trace: [ 30.910276] [ 30.910612] dump_stack_lvl+0x91/0xf0 [ 30.911129] print_report+0xcc/0x620 [ 30.911661] ? __virt_addr_valid+0x102/0x340 [ 30.912267] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.913042] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.913667] kasan_report+0xbe/0xf0 [ 30.914158] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.914783] vma_interval_tree_remove+0xc75/0xec0 [ 30.915392] vma_prepare+0xc54/0x11a0 [ 30.915877] __split_vma+0x5af/0x950 [ 30.916351] ? __pfx___split_vma+0x10/0x10 [ 30.916882] ? find_held_lock+0x2c/0x110 [ 30.917409] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.917996] ? lock_is_held_type+0x9f/0x120 [ 30.918538] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.919144] ? mtree_range_walk+0x632/0x900 [ 30.919705] ? mas_walk+0x5c7/0x7c0 [ 30.920180] do_vmi_munmap+0x1f1/0x2b0 [ 30.920676] mmap_region+0x1f9/0x2660 [ 30.921157] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.921684] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.922409] ? __pfx_lock_acquire+0x10/0x10 [ 30.922970] ? __pfx_mmap_region+0x10/0x10 [ 30.923515] ? security_mmap_addr+0x7d/0xa0 [ 30.924045] ? get_unmapped_area+0x1f5/0x3f0 [ 30.924598] do_mmap+0x854/0xf00 [ 30.925046] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.925554] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.926126] ksys_mmap_pgoff+0x3af/0x500 [ 30.926630] do_syscall_64+0x3f/0x90 [ 30.927108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.927765] RIP: 0033:0x7ff1156b9d82 [ 30.928225] 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 [ 30.930393] RSP: 002b:00007ffc416f3d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.931293] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff1156b9d82 [ 30.932151] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff114af3000 [ 30.932993] RBP: 00007ff114af3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.933840] R10: 0000000000000812 R11: 0000000000000206 R12: 000055743bedaf60 [ 30.934683] R13: 00007ffc416f3da0 R14: 00007ffc416f3dd0 R15: 00007ffc416f4130 [ 30.935534] [ 30.935827] [ 30.936046] Allocated by task 214: [ 30.936470] kasan_save_stack+0x22/0x50 [ 30.936972] kasan_set_track+0x25/0x30 [ 30.937465] __kasan_slab_alloc+0x59/0x70 [ 30.937994] kmem_cache_alloc+0x16b/0x370 [ 30.938511] vm_area_dup+0x20/0x160 [ 30.938965] __split_vma+0x170/0x950 [ 30.939437] split_vma+0xc6/0x110 [ 30.939884] mprotect_fixup+0x8d2/0xb30 [ 30.940394] do_mprotect_pkey+0x87e/0xd40 [ 30.940932] __x64_sys_mprotect+0x78/0xc0 [ 30.941452] do_syscall_64+0x3f/0x90 [ 30.941945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.942585] [ 30.942798] Freed by task 13: [ 30.943182] kasan_save_stack+0x22/0x50 [ 30.943685] kasan_set_track+0x25/0x30 [ 30.944176] kasan_save_free_info+0x2b/0x50 [ 30.944705] __kasan_slab_free+0x10a/0x190 [ 30.945235] kmem_cache_free+0x10d/0x4d0 [ 30.945748] rcu_core+0x8c8/0x2860 [ 30.946191] __do_softirq+0x1b7/0x7d4 [ 30.946671] [ 30.946888] Last potentially related work creation: [ 30.947467] kasan_save_stack+0x22/0x50 [ 30.947970] __kasan_record_aux_stack+0x8e/0xa0 [ 30.948540] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.949229] remove_vma+0x139/0x170 [ 30.949696] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.950257] do_vmi_munmap+0x1f1/0x2b0 [ 30.950740] __vm_munmap+0x138/0x3a0 [ 30.951217] __x64_sys_munmap+0x59/0x80 [ 30.951715] do_syscall_64+0x3f/0x90 [ 30.952188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.952833] [ 30.953054] The buggy address belongs to the object at ffff8880162a6000 [ 30.953054] which belongs to the cache vm_area_struct of size 168 [ 30.954559] The buggy address is located 88 bytes inside of [ 30.954559] freed 168-byte region [ffff8880162a6000, ffff8880162a60a8) [ 30.955975] [ 30.956192] The buggy address belongs to the physical page: [ 30.956854] page:0000000079a84d84 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x162a6 [ 30.957956] memcg:ffff88800dbdbc01 [ 30.958389] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.959036] page_type: 0xffffffff() [ 30.959498] raw: 0100000000000200 ffff8880087a0c80 ffffea00005ba840 dead000000000004 [ 30.960415] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbdbc01 [ 30.961341] page dumped because: kasan: bad access detected [ 30.962036] [ 30.962254] Memory state around the buggy address: [ 30.962837] ffff8880162a5f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.963697] ffff8880162a5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.964550] >ffff8880162a6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.965411] ^ [ 30.966177] ffff8880162a6080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.967058] ffff8880162a6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.967928] ================================================================== [ 30.968926] Disabling lock debugging due to kernel taint [ 33.976330] BUG: Bad rss-counter state mm:00000000f767bfe1 type:MM_FILEPAGES val:33 [ 33.977480] BUG: Bad rss-counter state mm:00000000f767bfe1 type:MM_ANONPAGES val:22 [ 34.437246] BUG: Bad rss-counter state mm:000000006303372e type:MM_FILEPAGES val:33 [ 34.438321] BUG: Bad rss-counter state mm:000000006303372e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56989' (ECDSA) to the list of known hosts. 2023/06/20 22:27:30 fuzzer started 2023/06/20 22:27:30 dialing manager at localhost:36067 2023/06/20 22:27:30 checking machine... 2023/06/20 22:27:30 checking revisions... [ 35.189874] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:27:30 testing simple program... [ 35.244488] cgroup: Unknown subsys name 'net' [ 35.285438] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:27:30 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff8880189cb911 RCX=ffffffff81b26418 RDX=ffffed1003139723 RSI=0000000000000008 RDI=ffff8880189cb910 RBP=0000000000000000 RSP=ffff8880094df248 R8 =0000000000000001 R9 =ffffed1003139722 R10=ffff8880189cb917 R11=0000000000009293 R12=ffff8880189cb910 R13=ffff8880094df638 R14=dffffc0000000000 R15=0000000000001913 RIP=ffffffff81b2641f 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 0000000000000000 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=00007ffd3e97d5d8 CR3=000000000ebbc000 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=2030333a37323a3232203032206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a363236333520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a37323a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff81390b6c RDX=dffffc0000000000 RSI=000000000000390b RDI=ffff888016d3f9e8 RBP=ffff888016d3fa40 RSP=ffff888016d3f978 R8 =0000000000000001 R9 =ffff888016d3fa28 R10=0000000000038001 R11=0000000000009789 R12=ffff888016d3fa48 R13=ffff888016d3fa30 R14=ffff888016d3fa29 R15=ffff888016d3f9e8 RIP=ffffffff81130754 RFL=00000283 [--S---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 00007fb8d0849900 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=00007ffc21552000 CR3=000000000ff58000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000