syzkaller login: [ 38.973804] BUG: Bad rss-counter state mm:00000000f04d3cd2 type:MM_FILEPAGES val:33 [ 38.975159] BUG: Bad rss-counter state mm:00000000f04d3cd2 type:MM_ANONPAGES val:22 [ 39.129574] ================================================================== [ 39.130431] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.131312] Read of size 8 at addr ffff88800c7044e0 by task sshd/219 [ 39.132030] [ 39.132238] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.133158] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.134070] Call Trace: [ 39.134370] [ 39.134641] dump_stack_lvl+0x91/0xf0 [ 39.135113] print_report+0xcc/0x620 [ 39.135570] ? __virt_addr_valid+0x102/0x340 [ 39.136097] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.136700] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.137278] kasan_report+0xbe/0xf0 [ 39.137742] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.138467] vma_interval_tree_remove+0xc75/0xec0 [ 39.139172] vma_prepare+0xc54/0x11a0 [ 39.139730] __split_vma+0x5af/0x950 [ 39.140283] ? __pfx___split_vma+0x10/0x10 [ 39.140910] ? find_held_lock+0x2c/0x110 [ 39.141517] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.142181] ? lock_is_held_type+0x9f/0x120 [ 39.142812] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.143519] ? mtree_range_walk+0x632/0x900 [ 39.144166] ? mas_walk+0x5c7/0x7c0 [ 39.144751] do_vmi_munmap+0x1f1/0x2b0 [ 39.145328] mmap_region+0x1f9/0x2660 [ 39.145893] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.146478] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.147275] ? __pfx_lock_acquire+0x10/0x10 [ 39.147892] ? __pfx_mmap_region+0x10/0x10 [ 39.148506] ? security_mmap_addr+0x7d/0xa0 [ 39.149141] ? get_unmapped_area+0x1f5/0x3f0 [ 39.149782] do_mmap+0x854/0xf00 [ 39.150293] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.150873] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.151528] ksys_mmap_pgoff+0x3af/0x500 [ 39.152122] do_syscall_64+0x3f/0x90 [ 39.152687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.153434] RIP: 0033:0x7f6977e95d82 [ 39.153952] 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 [ 39.156413] RSP: 002b:00007ffe4cc6d288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.157488] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6977e95d82 [ 39.158481] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69772cf000 [ 39.159469] RBP: 00007f69772cf000 R08: 0000000000000009 R09: 0000000000001000 [ 39.160517] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc511e7b20 [ 39.161535] R13: 00007ffe4cc6d2a0 R14: 00007ffe4cc6d2d0 R15: 00007ffe4cc6d630 [ 39.162497] [ 39.162821] [ 39.163061] Allocated by task 212: [ 39.163535] kasan_save_stack+0x22/0x50 [ 39.164096] kasan_set_track+0x25/0x30 [ 39.164666] __kasan_slab_alloc+0x59/0x70 [ 39.165250] kmem_cache_alloc+0x16b/0x370 [ 39.165824] vm_area_dup+0x20/0x160 [ 39.166331] __split_vma+0x170/0x950 [ 39.166844] split_vma+0xc6/0x110 [ 39.167332] mprotect_fixup+0x8d2/0xb30 [ 39.167886] do_mprotect_pkey+0x87e/0xd40 [ 39.168465] __x64_sys_mprotect+0x78/0xc0 [ 39.169058] do_syscall_64+0x3f/0x90 [ 39.169583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.170303] [ 39.170569] Freed by task 212: [ 39.171036] kasan_save_stack+0x22/0x50 [ 39.171609] kasan_set_track+0x25/0x30 [ 39.172080] kasan_save_free_info+0x2b/0x50 [ 39.172580] __kasan_slab_free+0x10a/0x190 [ 39.173229] kmem_cache_free+0x10d/0x4d0 [ 39.173831] rcu_core+0x8c8/0x2860 [ 39.174314] __do_softirq+0x1b7/0x7d4 [ 39.174853] [ 39.175097] Last potentially related work creation: [ 39.175703] kasan_save_stack+0x22/0x50 [ 39.176231] __kasan_record_aux_stack+0x8e/0xa0 [ 39.176867] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.177533] remove_vma+0x139/0x170 [ 39.178042] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.178603] do_vmi_munmap+0x1f1/0x2b0 [ 39.179159] __vm_munmap+0x138/0x3a0 [ 39.179729] __x64_sys_munmap+0x59/0x80 [ 39.180290] do_syscall_64+0x3f/0x90 [ 39.180886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.181639] [ 39.181869] Second to last potentially related work creation: [ 39.182567] kasan_save_stack+0x22/0x50 [ 39.183158] __kasan_record_aux_stack+0x8e/0xa0 [ 39.183854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.184523] remove_vma+0x139/0x170 [ 39.185056] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.185719] do_vmi_munmap+0x1f1/0x2b0 [ 39.186253] mmap_region+0x1f9/0x2660 [ 39.186783] do_mmap+0x854/0xf00 [ 39.187201] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.187666] ksys_mmap_pgoff+0x3af/0x500 [ 39.188149] do_syscall_64+0x3f/0x90 [ 39.188611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.189228] [ 39.189435] The buggy address belongs to the object at ffff88800c704488 [ 39.189435] which belongs to the cache vm_area_struct of size 168 [ 39.190813] The buggy address is located 88 bytes inside of [ 39.190813] freed 168-byte region [ffff88800c704488, ffff88800c704530) [ 39.192127] [ 39.192332] The buggy address belongs to the physical page: [ 39.192970] page:000000003aea9160 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc704 [ 39.193984] memcg:ffff88800d2b7301 [ 39.194387] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.195041] page_type: 0xffffffff() [ 39.195467] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 39.196351] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2b7301 [ 39.197329] page dumped because: kasan: bad access detected [ 39.198061] [ 39.198290] Memory state around the buggy address: [ 39.198994] ffff88800c704380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.199921] ffff88800c704400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.200849] >ffff88800c704480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.201752] ^ [ 39.202555] ffff88800c704500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 39.203491] ffff88800c704580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.204392] ================================================================== [ 39.205566] Disabling lock debugging due to kernel taint [ 42.021883] BUG: Bad rss-counter state mm:0000000080198ee2 type:MM_FILEPAGES val:33 [ 42.023450] BUG: Bad rss-counter state mm:0000000080198ee2 type:MM_ANONPAGES val:22 [ 42.588791] BUG: Bad rss-counter state mm:0000000086efa573 type:MM_FILEPAGES val:33 [ 42.589473] BUG: Bad rss-counter state mm:0000000086efa573 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32166' (ECDSA) to the list of known hosts. 2023/06/21 08:32:55 fuzzer started 2023/06/21 08:32:55 dialing manager at localhost:36067 2023/06/21 08:32:55 checking machine... 2023/06/21 08:32:55 checking revisions... [ 43.431262] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:32:55 testing simple program... [ 43.480250] cgroup: Unknown subsys name 'net' [ 43.544262] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:32:54 Registers: info registers vcpu 0 RAX=ffffffff818ad74a RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110033bfeff RSI=ffffffff818ad74a RDI=ffff888019dff868 RBP=ffff888019dff838 RSP=ffff888019dff798 R8 =0000000000000001 R9 =ffff888019dff7e0 R10=0000000000038001 R11=000000000002384c R12=ffff888019dff868 R13=0000000000000000 R14=ffff88801666d1c0 R15=ffff8880093ba260 RIP=ffffffff813ad470 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 00007f922930b900 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=00007f92298c30b0 CR3=000000000cb1e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fffaa5eb748 CR3=0000000016e7a000 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=2034353a32333a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a32333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000