syzkaller login: [ 29.999874] BUG: Bad rss-counter state mm:0000000040cfd7c1 type:MM_FILEPAGES val:33 [ 30.001205] BUG: Bad rss-counter state mm:0000000040cfd7c1 type:MM_ANONPAGES val:22 [ 30.170071] ================================================================== [ 30.171259] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.172499] Read of size 8 at addr ffff888016d06ed8 by task sshd/219 [ 30.173522] [ 30.173766] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.174734] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.175873] Call Trace: [ 30.176234] [ 30.176566] dump_stack_lvl+0x91/0xf0 [ 30.177115] print_report+0xcc/0x620 [ 30.177656] ? __virt_addr_valid+0x102/0x340 [ 30.178278] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.178983] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.179673] kasan_report+0xbe/0xf0 [ 30.180206] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.180932] vma_interval_tree_remove+0xc75/0xec0 [ 30.181613] vma_prepare+0xc54/0x11a0 [ 30.182151] __split_vma+0x5af/0x950 [ 30.182681] ? __pfx___split_vma+0x10/0x10 [ 30.183273] ? find_held_lock+0x2c/0x110 [ 30.183861] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.184508] ? lock_is_held_type+0x9f/0x120 [ 30.185120] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.185803] ? mtree_range_walk+0x632/0x900 [ 30.186422] ? mas_walk+0x5c7/0x7c0 [ 30.186957] do_vmi_munmap+0x1f1/0x2b0 [ 30.187511] mmap_region+0x1f9/0x2660 [ 30.188052] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.188648] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.189459] ? __pfx_lock_acquire+0x10/0x10 [ 30.190060] ? __pfx_mmap_region+0x10/0x10 [ 30.190655] ? security_mmap_addr+0x7d/0xa0 [ 30.191255] ? get_unmapped_area+0x1f5/0x3f0 [ 30.191878] do_mmap+0x854/0xf00 [ 30.192398] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.192958] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.193590] ksys_mmap_pgoff+0x3af/0x500 [ 30.194166] do_syscall_64+0x3f/0x90 [ 30.194704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.195435] RIP: 0033:0x7f030914fd82 [ 30.195952] 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 [ 30.198372] RSP: 002b:00007fffb46789a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.199395] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f030914fd82 [ 30.200361] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0308589000 [ 30.201321] RBP: 00007f0308589000 R08: 0000000000000009 R09: 0000000000001000 [ 30.202281] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ff94a2980 [ 30.203240] R13: 00007fffb46789c0 R14: 00007fffb46789f0 R15: 00007fffb4678d50 [ 30.204210] [ 30.204563] [ 30.204803] Allocated by task 212: [ 30.205282] kasan_save_stack+0x22/0x50 [ 30.205851] kasan_set_track+0x25/0x30 [ 30.206403] __kasan_slab_alloc+0x59/0x70 [ 30.206992] kmem_cache_alloc+0x16b/0x370 [ 30.207574] vm_area_dup+0x20/0x160 [ 30.208082] __split_vma+0x170/0x950 [ 30.208617] split_vma+0xc6/0x110 [ 30.209111] mprotect_fixup+0x8d2/0xb30 [ 30.209677] do_mprotect_pkey+0x87e/0xd40 [ 30.210260] __x64_sys_mprotect+0x78/0xc0 [ 30.210846] do_syscall_64+0x3f/0x90 [ 30.211382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.212112] [ 30.212437] Freed by task 212: [ 30.213029] kasan_save_stack+0x22/0x50 [ 30.213842] kasan_set_track+0x25/0x30 [ 30.214511] kasan_save_free_info+0x2b/0x50 [ 30.215186] __kasan_slab_free+0x10a/0x190 [ 30.215981] kmem_cache_free+0x10d/0x4d0 [ 30.216707] rcu_core+0x8c8/0x2860 [ 30.217269] __do_softirq+0x1b7/0x7d4 [ 30.217934] [ 30.218281] Last potentially related work creation: [ 30.219073] kasan_save_stack+0x22/0x50 [ 30.219712] __kasan_record_aux_stack+0x8e/0xa0 [ 30.220575] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.221433] remove_vma+0x139/0x170 [ 30.222048] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.222881] do_vmi_munmap+0x1f1/0x2b0 [ 30.223536] __vm_munmap+0x138/0x3a0 [ 30.224138] __x64_sys_munmap+0x59/0x80 [ 30.224867] do_syscall_64+0x3f/0x90 [ 30.225510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.226391] [ 30.226680] The buggy address belongs to the object at ffff888016d06e80 [ 30.226680] which belongs to the cache vm_area_struct of size 168 [ 30.228717] The buggy address is located 88 bytes inside of [ 30.228717] freed 168-byte region [ffff888016d06e80, ffff888016d06f28) [ 30.230397] [ 30.230653] The buggy address belongs to the physical page: [ 30.231476] page:00000000d3a9e2ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d06 [ 30.232700] memcg:ffff88800b8a8f01 [ 30.233204] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.233946] page_type: 0xffffffff() [ 30.234445] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.235588] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b8a8f01 [ 30.236613] page dumped because: kasan: bad access detected [ 30.237420] [ 30.237648] Memory state around the buggy address: [ 30.238301] ffff888016d06d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.239336] ffff888016d06e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.240298] >ffff888016d06e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.241342] ^ [ 30.242122] ffff888016d06f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.243154] ffff888016d06f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.244114] ================================================================== [ 30.245558] Disabling lock debugging due to kernel taint [ 32.246841] BUG: Bad rss-counter state mm:0000000013afa0ad type:MM_FILEPAGES val:33 [ 32.247840] BUG: Bad rss-counter state mm:0000000013afa0ad type:MM_ANONPAGES val:22 [ 32.715475] BUG: Bad rss-counter state mm:0000000078ce60f1 type:MM_FILEPAGES val:31 [ 32.717022] BUG: Bad rss-counter state mm:0000000078ce60f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59974' (ECDSA) to the list of known hosts. 2023/06/21 10:46:59 fuzzer started 2023/06/21 10:47:00 dialing manager at localhost:36067 2023/06/21 10:47:00 checking machine... 2023/06/21 10:47:00 checking revisions... [ 33.392097] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:47:00 testing simple program... [ 33.448058] cgroup: Unknown subsys name 'net' [ 33.497733] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:46:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85652c60 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=ffffffff86607dd4 RSP=ffff88806ce099f0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e83 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=00007f23d79b6000 CR3=000000000c4d6000 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=2039353a36343a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a36343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000055fd1da37540 RCX=000055fd1da01010 RDX=0000000000000017 RSI=0000000000000007 RDI=000055fd1da20350 RBP=0000000000000000 RSP=00007ffd823e63f8 R8 =000055fd1da27870 R9 =000055fd1da25910 R10=0000000000000022 R11=0000000000000202 R12=00000000ffffffe3 R13=000055fd1c89e1c0 R14=00007ffd823e6780 R15=00007ffd823e6530 RIP=000055fd1c847590 RFL=00000202 [-------] 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 00007fcb49024900 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=000055fd1da3c4c8 CR3=000000001c976000 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