syzkaller login: [ 31.666745] BUG: Bad rss-counter state mm:000000008a2a1d09 type:MM_FILEPAGES val:33 [ 31.669061] BUG: Bad rss-counter state mm:000000008a2a1d09 type:MM_ANONPAGES val:22 [ 31.839870] ================================================================== [ 31.840795] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.841727] Read of size 8 at addr ffff888009cbd968 by task sshd/220 [ 31.842492] [ 31.842707] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.843685] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.844669] Call Trace: [ 31.844990] [ 31.845273] dump_stack_lvl+0x91/0xf0 [ 31.845776] print_report+0xcc/0x620 [ 31.846275] ? __virt_addr_valid+0x102/0x340 [ 31.846836] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.847461] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.848089] kasan_report+0xbe/0xf0 [ 31.848569] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.849217] vma_interval_tree_remove+0xc75/0xec0 [ 31.849927] vma_prepare+0xc54/0x11a0 [ 31.850492] __split_vma+0x5af/0x950 [ 31.851093] ? __pfx___split_vma+0x10/0x10 [ 31.851724] ? find_held_lock+0x2c/0x110 [ 31.852345] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.853018] ? lock_is_held_type+0x9f/0x120 [ 31.853661] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.854383] ? mtree_range_walk+0x632/0x900 [ 31.855061] ? mas_walk+0x5c7/0x7c0 [ 31.855623] do_vmi_munmap+0x1f1/0x2b0 [ 31.856206] mmap_region+0x1f9/0x2660 [ 31.856770] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.857377] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.858223] ? __pfx_lock_acquire+0x10/0x10 [ 31.858847] ? __pfx_mmap_region+0x10/0x10 [ 31.859529] ? security_mmap_addr+0x7d/0xa0 [ 31.860170] ? get_unmapped_area+0x1f5/0x3f0 [ 31.860822] do_mmap+0x854/0xf00 [ 31.861353] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.861938] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.862595] ksys_mmap_pgoff+0x3af/0x500 [ 31.863213] do_syscall_64+0x3f/0x90 [ 31.863779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.864545] RIP: 0033:0x7f3d6fac7d82 [ 31.865082] 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 [ 31.867653] RSP: 002b:00007ffd3b5791b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.868737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3d6fac7d82 [ 31.869748] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3d6ef01000 [ 31.870752] RBP: 00007f3d6ef01000 R08: 0000000000000009 R09: 0000000000001000 [ 31.871773] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d6fd92ec0 [ 31.872781] R13: 00007ffd3b5791d0 R14: 00007ffd3b579200 R15: 00007ffd3b579560 [ 31.873785] [ 31.874126] [ 31.874376] Allocated by task 213: [ 31.874874] kasan_save_stack+0x22/0x50 [ 31.875499] kasan_set_track+0x25/0x30 [ 31.876076] __kasan_slab_alloc+0x59/0x70 [ 31.876690] kmem_cache_alloc+0x16b/0x370 [ 31.877293] vm_area_dup+0x20/0x160 [ 31.877820] __split_vma+0x170/0x950 [ 31.878359] split_vma+0xc6/0x110 [ 31.878880] mprotect_fixup+0x8d2/0xb30 [ 31.879481] do_mprotect_pkey+0x87e/0xd40 [ 31.880091] __x64_sys_mprotect+0x78/0xc0 [ 31.880692] do_syscall_64+0x3f/0x90 [ 31.881240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.881994] [ 31.882244] Freed by task 213: [ 31.882711] kasan_save_stack+0x22/0x50 [ 31.883315] kasan_set_track+0x25/0x30 [ 31.883892] kasan_save_free_info+0x2b/0x50 [ 31.884514] __kasan_slab_free+0x10a/0x190 [ 31.885128] kmem_cache_free+0x10d/0x4d0 [ 31.885725] rcu_core+0x8c8/0x2860 [ 31.886240] __do_softirq+0x1b7/0x7d4 [ 31.886795] [ 31.887070] Last potentially related work creation: [ 31.887754] kasan_save_stack+0x22/0x50 [ 31.888338] __kasan_record_aux_stack+0x8e/0xa0 [ 31.889004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.889761] remove_vma+0x139/0x170 [ 31.890280] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.890938] do_vmi_munmap+0x1f1/0x2b0 [ 31.891504] __vm_munmap+0x138/0x3a0 [ 31.892048] __x64_sys_munmap+0x59/0x80 [ 31.892624] do_syscall_64+0x3f/0x90 [ 31.893170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.893916] [ 31.894164] The buggy address belongs to the object at ffff888009cbd910 [ 31.894164] which belongs to the cache vm_area_struct of size 168 [ 31.895905] The buggy address is located 88 bytes inside of [ 31.895905] freed 168-byte region [ffff888009cbd910, ffff888009cbd9b8) [ 31.897553] [ 31.897799] The buggy address belongs to the physical page: [ 31.898567] page:00000000fff15f83 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9cbd [ 31.899832] memcg:ffff8880183af201 [ 31.900325] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.901063] page_type: 0xffffffff() [ 31.901584] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.902645] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880183af201 [ 31.903707] page dumped because: kasan: bad access detected [ 31.904477] [ 31.904726] Memory state around the buggy address: [ 31.905389] ffff888009cbd800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.906372] ffff888009cbd880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.907380] >ffff888009cbd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.908370] ^ [ 31.909276] ffff888009cbd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.910252] ffff888009cbda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.911237] ================================================================== [ 31.912720] Disabling lock debugging due to kernel taint [ 33.883712] BUG: Bad rss-counter state mm:000000009bbfab71 type:MM_FILEPAGES val:33 [ 33.884361] BUG: Bad rss-counter state mm:000000009bbfab71 type:MM_ANONPAGES val:22 [ 34.384723] BUG: Bad rss-counter state mm:00000000b5f524a7 type:MM_FILEPAGES val:33 [ 34.385879] BUG: Bad rss-counter state mm:00000000b5f524a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44771' (ECDSA) to the list of known hosts. 2023/06/20 10:34:27 fuzzer started 2023/06/20 10:34:27 dialing manager at localhost:44161 2023/06/20 10:34:27 checking machine... 2023/06/20 10:34:27 checking revisions... [ 35.162716] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:34:27 testing simple program... [ 35.215323] cgroup: Unknown subsys name 'net' [ 35.288163] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:34:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d5b8d98 RCX=0000000000000000 RDX=ffff8880158d9b40 RSI=ffffffff818d58de RDI=ffff88800d5b91f0 RBP=dffffc0000000000 RSP=ffff888015957718 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=3830306234386136 R12=0000000000000212 R13=ffff8880088c8380 R14=ffffffff87f32460 R15=00000000432a8bc1 RIP=ffffffff818d591a 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 00007f8abe46e900 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=00007f8abd901e80 CR3=000000000ecf8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b9d7b0f215e0bbd000000000000ae988 XMM05=8bf70bf8dcbf4d800000000000135578 XMM06=4fda316b135da52b0000000000134368 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000092cb9baa RBX=0000000081c84743 RCX=ffff88806cf09c00 RDX=0000000000000007 RSI=0000000000000002 RDI=000000009a0abf9d RBP=ffffffff813782a8 RSP=ffff88806cf09b68 R8 =00000000ffffffff R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=ffff88806cf09bd0 R15=0000000000000007 RIP=ffffffff82270e91 RFL=00000286 [--S--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 00007f2070de8900 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=00007f20713a00b0 CR3=000000000c958000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000