syzkaller login: [ 30.200969] BUG: Bad rss-counter state mm:000000002a963db8 type:MM_FILEPAGES val:33 [ 30.202515] BUG: Bad rss-counter state mm:000000002a963db8 type:MM_ANONPAGES val:22 [ 30.367667] ================================================================== [ 30.369050] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.370344] Read of size 8 at addr ffff88800f0136b0 by task sshd/221 [ 30.371412] [ 30.371706] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.372851] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.374168] Call Trace: [ 30.374603] <TASK> [ 30.374984] dump_stack_lvl+0x91/0xf0 [ 30.375642] print_report+0xcc/0x620 [ 30.376292] ? __virt_addr_valid+0x102/0x340 [ 30.377034] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.377875] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.378768] kasan_report+0xbe/0xf0 [ 30.379436] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.380317] vma_interval_tree_remove+0xc75/0xec0 [ 30.381166] vma_prepare+0xc54/0x11a0 [ 30.381835] __split_vma+0x5af/0x950 [ 30.382523] ? __pfx___split_vma+0x10/0x10 [ 30.383278] ? find_held_lock+0x2c/0x110 [ 30.384010] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.384805] ? lock_is_held_type+0x9f/0x120 [ 30.385562] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.386424] ? mtree_range_walk+0x632/0x900 [ 30.387198] ? mas_walk+0x5c7/0x7c0 [ 30.387860] do_vmi_munmap+0x1f1/0x2b0 [ 30.388550] mmap_region+0x1f9/0x2660 [ 30.389228] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.389942] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.390741] ? __pfx_lock_acquire+0x10/0x10 [ 30.391298] ? __pfx_mmap_region+0x10/0x10 [ 30.391856] ? security_mmap_addr+0x7d/0xa0 [ 30.392402] ? get_unmapped_area+0x1f5/0x3f0 [ 30.392970] do_mmap+0x854/0xf00 [ 30.393427] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.393947] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.394562] ksys_mmap_pgoff+0x3af/0x500 [ 30.395097] do_syscall_64+0x3f/0x90 [ 30.395600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.396268] RIP: 0033:0x7f9c2f99ed82 [ 30.396747] 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 [ 30.398992] RSP: 002b:00007ffebd102b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.399934] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c2f99ed82 [ 30.400807] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c2edd8000 [ 30.401686] RBP: 00007f9c2edd8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.402597] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643204a6f70 [ 30.403475] R13: 00007ffebd102b90 R14: 00007ffebd102bc0 R15: 00007ffebd102f20 [ 30.404359] </TASK> [ 30.404661] [ 30.404882] Allocated by task 214: [ 30.405324] kasan_save_stack+0x22/0x50 [ 30.405851] kasan_set_track+0x25/0x30 [ 30.406388] __kasan_slab_alloc+0x59/0x70 [ 30.406933] kmem_cache_alloc+0x16b/0x370 [ 30.407462] vm_area_dup+0x20/0x160 [ 30.407929] __split_vma+0x170/0x950 [ 30.408409] split_vma+0xc6/0x110 [ 30.408860] mprotect_fixup+0x8d2/0xb30 [ 30.409477] do_mprotect_pkey+0x87e/0xd40 [ 30.410015] __x64_sys_mprotect+0x78/0xc0 [ 30.410585] do_syscall_64+0x3f/0x90 [ 30.411077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.411754] [ 30.411977] Freed by task 19: [ 30.412375] kasan_save_stack+0x22/0x50 [ 30.412895] kasan_set_track+0x25/0x30 [ 30.413405] kasan_save_free_info+0x2b/0x50 [ 30.413952] __kasan_slab_free+0x10a/0x190 [ 30.414523] kmem_cache_free+0x10d/0x4d0 [ 30.415048] rcu_core+0x8c8/0x2860 [ 30.415506] __do_softirq+0x1b7/0x7d4 [ 30.416011] [ 30.416233] Last potentially related work creation: [ 30.416839] kasan_save_stack+0x22/0x50 [ 30.417363] __kasan_record_aux_stack+0x8e/0xa0 [ 30.417956] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.418633] remove_vma+0x139/0x170 [ 30.419103] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.419677] do_vmi_munmap+0x1f1/0x2b0 [ 30.420182] __vm_munmap+0x138/0x3a0 [ 30.420664] __x64_sys_munmap+0x59/0x80 [ 30.421182] do_syscall_64+0x3f/0x90 [ 30.421674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.422363] [ 30.422583] The buggy address belongs to the object at ffff88800f013658 [ 30.422583] which belongs to the cache vm_area_struct of size 168 [ 30.424109] The buggy address is located 88 bytes inside of [ 30.424109] freed 168-byte region [ffff88800f013658, ffff88800f013700) [ 30.425562] [ 30.425781] The buggy address belongs to the physical page: [ 30.426479] page:000000006c20bc90 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf013 [ 30.427598] memcg:ffff88800fbbc701 [ 30.428040] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.428704] page_type: 0xffffffff() [ 30.429166] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.430129] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbbc701 [ 30.431065] page dumped because: kasan: bad access detected [ 30.431752] [ 30.431974] Memory state around the buggy address: [ 30.432571] ffff88800f013580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.433463] ffff88800f013600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.434370] >ffff88800f013680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.435246] ^ [ 30.435831] ffff88800f013700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.436682] ffff88800f013780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.437527] ================================================================== [ 30.438530] Disabling lock debugging due to kernel taint [ 32.464278] BUG: Bad rss-counter state mm:00000000e8c78183 type:MM_FILEPAGES val:33 [ 32.465060] BUG: Bad rss-counter state mm:00000000e8c78183 type:MM_ANONPAGES val:22 [ 32.966462] BUG: Bad rss-counter state mm:000000001d4d3a75 type:MM_FILEPAGES val:33 [ 32.967632] BUG: Bad rss-counter state mm:000000001d4d3a75 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37237' (ECDSA) to the list of known hosts. 2023/06/21 03:03:54 fuzzer started 2023/06/21 03:03:54 dialing manager at localhost:36067 2023/06/21 03:03:54 checking machine... 2023/06/21 03:03:54 checking revisions... [ 33.532626] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:03:54 testing simple program... [ 33.583576] cgroup: Unknown subsys name 'net' [ 33.625655] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:03:54 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=ffff888008c04000 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=00007f306a043860 CR3=000000000d88c000 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=56a39b8399d1eea6d3471abf1f41ce98 XMM02=ec2efd57dc4c00df000000000011a060 XMM03=81a83971ea2d30fa000000000011a130 XMM04=be6281f3ae4ae0be00000000000ae988 XMM05=59d5b690e0af863b0000000000131c58 XMM06=a9febd2c2ddb01040000000000130ac0 XMM07=e042d86d42eb936e0000000000122070 XMM08=81a83971ea2d30fa000000000011a130 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000050 RBX=0000000000000003 RCX=0000000000000000 RDX=0000000000000002 RSI=00005620a99973f8 RDI=0000000000000040 RBP=0000000000000040 RSP=00007ffcd4aad080 R8 =0000000000000002 R9 =0000000000000000 R10=0000000000000000 R11=00007fea84d953c0 R12=fffffffffffffe28 R13=0000000000000000 R14=00007ffcd4aad0a0 R15=00007ffcd4aad0d0 RIP=00007fea84cad12a RFL=00000217 [----APC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fea8482f900 00000000 00000000 GS =0000 0000000000000000 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=00007ffcd4aaa000 CR3=000000000ece0000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000