syzkaller login: [ 35.401179] BUG: Bad rss-counter state mm:000000008c9746bd type:MM_FILEPAGES val:33 [ 35.402195] BUG: Bad rss-counter state mm:000000008c9746bd type:MM_ANONPAGES val:22 [ 35.560992] ================================================================== [ 35.562018] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.563022] Read of size 8 at addr ffff88800e6273f8 by task sshd/218 [ 35.563936] [ 35.564185] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.565141] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.566234] Call Trace: [ 35.566595] [ 35.566911] dump_stack_lvl+0x91/0xf0 [ 35.567456] print_report+0xcc/0x620 [ 35.567988] ? __virt_addr_valid+0x102/0x340 [ 35.568580] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.569259] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.569918] kasan_report+0xbe/0xf0 [ 35.570446] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.571124] vma_interval_tree_remove+0xc75/0xec0 [ 35.571780] vma_prepare+0xc54/0x11a0 [ 35.572300] __split_vma+0x5af/0x950 [ 35.572807] ? __pfx___split_vma+0x10/0x10 [ 35.573385] ? find_held_lock+0x2c/0x110 [ 35.573951] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.574584] ? lock_is_held_type+0x9f/0x120 [ 35.575169] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.575836] ? mtree_range_walk+0x632/0x900 [ 35.576432] ? mas_walk+0x5c7/0x7c0 [ 35.576947] do_vmi_munmap+0x1f1/0x2b0 [ 35.577487] mmap_region+0x1f9/0x2660 [ 35.578010] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.578584] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.579359] ? __pfx_lock_acquire+0x10/0x10 [ 35.579937] ? __pfx_mmap_region+0x10/0x10 [ 35.580522] ? security_mmap_addr+0x7d/0xa0 [ 35.581104] ? get_unmapped_area+0x1f5/0x3f0 [ 35.581714] do_mmap+0x854/0xf00 [ 35.582195] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.582760] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.583330] ksys_mmap_pgoff+0x3af/0x500 [ 35.583849] do_syscall_64+0x3f/0x90 [ 35.584332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.584977] RIP: 0033:0x7fea15598d82 [ 35.585438] 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 [ 35.587604] RSP: 002b:00007ffc052ff058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.588520] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea15598d82 [ 35.589427] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea149d2000 [ 35.590320] RBP: 00007fea149d2000 R08: 0000000000000009 R09: 0000000000001000 [ 35.591180] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba7e570ec0 [ 35.592048] R13: 00007ffc052ff070 R14: 00007ffc052ff0a0 R15: 00007ffc052ff400 [ 35.592923] [ 35.593242] [ 35.593469] Allocated by task 211: [ 35.593904] kasan_save_stack+0x22/0x50 [ 35.594444] kasan_set_track+0x25/0x30 [ 35.594955] __kasan_slab_alloc+0x59/0x70 [ 35.595498] kmem_cache_alloc+0x16b/0x370 [ 35.596053] vm_area_dup+0x20/0x160 [ 35.596543] __split_vma+0x170/0x950 [ 35.597036] split_vma+0xc6/0x110 [ 35.597490] mprotect_fixup+0x8d2/0xb30 [ 35.598009] do_mprotect_pkey+0x87e/0xd40 [ 35.598561] __x64_sys_mprotect+0x78/0xc0 [ 35.599095] do_syscall_64+0x3f/0x90 [ 35.599579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.600233] [ 35.600452] Freed by task 211: [ 35.600860] kasan_save_stack+0x22/0x50 [ 35.601377] kasan_set_track+0x25/0x30 [ 35.601886] kasan_save_free_info+0x2b/0x50 [ 35.602446] __kasan_slab_free+0x10a/0x190 [ 35.602984] kmem_cache_free+0x10d/0x4d0 [ 35.603500] rcu_core+0x8c8/0x2860 [ 35.603954] __do_softirq+0x1b7/0x7d4 [ 35.604437] [ 35.604661] Last potentially related work creation: [ 35.605263] kasan_save_stack+0x22/0x50 [ 35.605794] __kasan_record_aux_stack+0x8e/0xa0 [ 35.606394] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.607040] remove_vma+0x139/0x170 [ 35.607524] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.608117] do_vmi_munmap+0x1f1/0x2b0 [ 35.608611] __vm_munmap+0x138/0x3a0 [ 35.609087] __x64_sys_munmap+0x59/0x80 [ 35.609588] do_syscall_64+0x3f/0x90 [ 35.610095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.610766] [ 35.610989] The buggy address belongs to the object at ffff88800e6273a0 [ 35.610989] which belongs to the cache vm_area_struct of size 168 [ 35.612517] The buggy address is located 88 bytes inside of [ 35.612517] freed 168-byte region [ffff88800e6273a0, ffff88800e627448) [ 35.613942] [ 35.614167] The buggy address belongs to the physical page: [ 35.614843] page:00000000037d5a7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe627 [ 35.615922] memcg:ffff88800e093701 [ 35.616352] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.617048] page_type: 0xffffffff() [ 35.617500] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 35.618452] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e093701 [ 35.619365] page dumped because: kasan: bad access detected [ 35.620024] [ 35.620244] Memory state around the buggy address: [ 35.620822] ffff88800e627280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.621689] ffff88800e627300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.622574] >ffff88800e627380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.623420] ^ [ 35.624256] ffff88800e627400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.625117] ffff88800e627480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.625967] ================================================================== [ 35.627040] Disabling lock debugging due to kernel taint [ 37.423987] BUG: Bad rss-counter state mm:000000000e40436a type:MM_FILEPAGES val:33 [ 37.425070] BUG: Bad rss-counter state mm:000000000e40436a type:MM_ANONPAGES val:22 [ 37.900900] BUG: Bad rss-counter state mm:00000000caeb9c74 type:MM_FILEPAGES val:33 [ 37.902273] BUG: Bad rss-counter state mm:00000000caeb9c74 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46455' (ECDSA) to the list of known hosts. 2023/06/19 16:03:07 fuzzer started 2023/06/19 16:03:07 dialing manager at localhost:44161 2023/06/19 16:03:07 checking machine... 2023/06/19 16:03:07 checking revisions... [ 38.620388] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:03:07 testing simple program... [ 38.669105] cgroup: Unknown subsys name 'net' [ 38.737259] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:03:04 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff88800f300000 RCX=0000000000000100 RDX=000000000001c062 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffff88800f300180 RSP=ffff88806ce09ca8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=0000000000000000 R12=000000000001c062 R13=ffff88800f3044c8 R14=0000000000000000 R15=ffff88800f300008 RIP=ffffffff821920cf RFL=00000046 [---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 00007fac93dcd900 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=00007fac94382650 CR3=000000000fcc8000 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=00000000000000a0 RBX=00000000000000a0 RCX=0000000000000000 RDX=00000000000101f6 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff88800f300000 RSP=ffff88800a1b77d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f6 R11=0000000000000128 R12=00000000000101f6 R13=ffffed1001e60001 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff821927de RFL=00000093 [--S-A-C] 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 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=000056514c06c000 CR3=0000000009842000 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=2037303a33303a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a33303a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000