syzkaller login: [ 60.355045] BUG: Bad rss-counter state mm:00000000091f4b93 type:MM_FILEPAGES val:33 [ 60.356311] BUG: Bad rss-counter state mm:00000000091f4b93 type:MM_ANONPAGES val:22 [ 60.383071] ================================================================== [ 60.383992] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.384894] Read of size 8 at addr ffff88800dca0880 by task sshd/222 [ 60.385605] [ 60.385817] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.386630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.387532] Call Trace: [ 60.387837] [ 60.388172] dump_stack_lvl+0x91/0xf0 [ 60.388595] print_report+0xcc/0x620 [ 60.389101] ? __virt_addr_valid+0x102/0x340 [ 60.389659] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.390152] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.390838] kasan_report+0xbe/0xf0 [ 60.391326] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.391831] vma_interval_tree_remove+0xc75/0xec0 [ 60.392395] vma_prepare+0xc54/0x11a0 [ 60.392873] __split_vma+0x5af/0x950 [ 60.393348] ? __pfx___split_vma+0x10/0x10 [ 60.393855] ? find_held_lock+0x2c/0x110 [ 60.394269] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.394761] ? lock_is_held_type+0x9f/0x120 [ 60.395275] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.395757] ? mtree_range_walk+0x632/0x900 [ 60.396184] ? mas_walk+0x5c7/0x7c0 [ 60.396561] do_vmi_munmap+0x1f1/0x2b0 [ 60.396952] mmap_region+0x1f9/0x2660 [ 60.397334] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.397740] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.398307] ? __pfx_lock_acquire+0x10/0x10 [ 60.398729] ? __pfx_mmap_region+0x10/0x10 [ 60.399157] ? security_mmap_addr+0x7d/0xa0 [ 60.399571] ? get_unmapped_area+0x1f5/0x3f0 [ 60.399996] do_mmap+0x854/0xf00 [ 60.400344] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.400729] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.401171] ksys_mmap_pgoff+0x3af/0x500 [ 60.401567] do_syscall_64+0x3f/0x90 [ 60.401942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.402450] RIP: 0033:0x7fb1c9a62d82 [ 60.402806] 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 [ 60.404507] RSP: 002b:00007ffc875d44d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.405216] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb1c9a62d82 [ 60.405868] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb1c8e9c000 [ 60.406529] RBP: 00007fb1c8e9c000 R08: 0000000000000009 R09: 0000000000001000 [ 60.407206] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3d8bcbec0 [ 60.407864] R13: 00007ffc875d44f0 R14: 00007ffc875d4520 R15: 00007ffc875d4880 [ 60.408533] [ 60.408762] [ 60.408931] Allocated by task 215: [ 60.409279] kasan_save_stack+0x22/0x50 [ 60.409680] kasan_set_track+0x25/0x30 [ 60.410068] __kasan_slab_alloc+0x59/0x70 [ 60.410479] kmem_cache_alloc+0x16b/0x370 [ 60.410904] vm_area_dup+0x20/0x160 [ 60.411266] __split_vma+0x170/0x950 [ 60.411631] split_vma+0xc6/0x110 [ 60.411979] mprotect_fixup+0x8d2/0xb30 [ 60.412379] do_mprotect_pkey+0x87e/0xd40 [ 60.412791] __x64_sys_mprotect+0x78/0xc0 [ 60.413209] do_syscall_64+0x3f/0x90 [ 60.413590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.414102] [ 60.414268] Freed by task 215: [ 60.414575] kasan_save_stack+0x22/0x50 [ 60.414978] kasan_set_track+0x25/0x30 [ 60.415367] kasan_save_free_info+0x2b/0x50 [ 60.415778] __kasan_slab_free+0x10a/0x190 [ 60.416202] kmem_cache_free+0x10d/0x4d0 [ 60.416600] rcu_core+0x8c8/0x2860 [ 60.416942] __do_softirq+0x1b7/0x7d4 [ 60.417319] [ 60.417488] Last potentially related work creation: [ 60.417955] kasan_save_stack+0x22/0x50 [ 60.418353] __kasan_record_aux_stack+0x8e/0xa0 [ 60.418812] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.419331] remove_vma+0x139/0x170 [ 60.419683] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.420116] do_vmi_munmap+0x1f1/0x2b0 [ 60.420501] __vm_munmap+0x138/0x3a0 [ 60.420874] __x64_sys_munmap+0x59/0x80 [ 60.421276] do_syscall_64+0x3f/0x90 [ 60.421646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.422150] [ 60.422319] The buggy address belongs to the object at ffff88800dca0828 [ 60.422319] which belongs to the cache vm_area_struct of size 168 [ 60.423602] The buggy address is located 88 bytes inside of [ 60.423602] freed 168-byte region [ffff88800dca0828, ffff88800dca08d0) [ 60.424710] [ 60.424882] The buggy address belongs to the physical page: [ 60.425410] page:00000000377272f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdca0 [ 60.426259] memcg:ffff88800cae6b01 [ 60.426590] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.427112] page_type: 0xffffffff() [ 60.427493] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.428257] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cae6b01 [ 60.429013] page dumped because: kasan: bad access detected [ 60.429532] [ 60.429702] Memory state around the buggy address: [ 60.430169] ffff88800dca0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 60.430881] ffff88800dca0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 60.431548] >ffff88800dca0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 60.432237] ^ [ 60.432575] ffff88800dca0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.433271] ffff88800dca0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 60.433923] ================================================================== [ 60.434773] Disabling lock debugging due to kernel taint [ 62.126295] BUG: Bad rss-counter state mm:00000000424ed20f type:MM_FILEPAGES val:33 [ 62.126978] BUG: Bad rss-counter state mm:00000000424ed20f type:MM_ANONPAGES val:22 [ 62.459230] BUG: Bad rss-counter state mm:00000000efec03d5 type:MM_FILEPAGES val:33 [ 62.459913] BUG: Bad rss-counter state mm:00000000efec03d5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12506' (ECDSA) to the list of known hosts. 2023/06/20 17:23:31 fuzzer started 2023/06/20 17:23:32 dialing manager at localhost:36067 2023/06/20 17:23:32 checking machine... 2023/06/20 17:23:32 checking revisions... [ 63.099771] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:23:32 testing simple program... [ 63.146358] cgroup: Unknown subsys name 'net' [ 63.217515] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:23:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=000055734d249fe0 CR3=000000000f012000 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=2031333a33323a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a33323a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100345fe29 RSI=ffffffff844c3254 RDI=ffff88801a2ff1b8 RBP=ffff88801a2ff188 RSP=ffff88801a2ff0e0 R8 =0000000000000001 R9 =ffff88801a2ff130 R10=0000000000038001 R11=00000000000b3edc R12=ffff88801a2ff1b8 R13=0000000000000000 R14=ffff8880164fd1c0 R15=ffff88800d5464c0 RIP=ffffffff813ad47f RFL=00000282 [--S----] 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 00007f4309e32900 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=00007f4309ddc008 CR3=000000000e17e000 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=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