syzkaller login: [ 31.374520] BUG: Bad rss-counter state mm:000000007b5c03c7 type:MM_FILEPAGES val:33 [ 31.376547] BUG: Bad rss-counter state mm:000000007b5c03c7 type:MM_ANONPAGES val:22 [ 31.535722] ================================================================== [ 31.536581] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.537461] Read of size 8 at addr ffff88800e8c14e0 by task sshd/220 [ 31.538377] [ 31.538584] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.539394] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.540297] Call Trace: [ 31.540604] [ 31.540872] dump_stack_lvl+0x91/0xf0 [ 31.541334] print_report+0xcc/0x620 [ 31.541792] ? __virt_addr_valid+0x102/0x340 [ 31.542516] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.543266] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.544022] kasan_report+0xbe/0xf0 [ 31.544600] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.545346] vma_interval_tree_remove+0xc75/0xec0 [ 31.546081] vma_prepare+0xc54/0x11a0 [ 31.546670] __split_vma+0x5af/0x950 [ 31.547250] ? __pfx___split_vma+0x10/0x10 [ 31.547895] ? find_held_lock+0x2c/0x110 [ 31.548530] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.549219] ? lock_is_held_type+0x9f/0x120 [ 31.549895] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.550637] ? mtree_range_walk+0x632/0x900 [ 31.551320] ? mas_walk+0x5c7/0x7c0 [ 31.551908] do_vmi_munmap+0x1f1/0x2b0 [ 31.552503] mmap_region+0x1f9/0x2660 [ 31.553098] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.553712] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.554601] ? __pfx_lock_acquire+0x10/0x10 [ 31.555251] ? __pfx_mmap_region+0x10/0x10 [ 31.555888] ? security_mmap_addr+0x7d/0xa0 [ 31.556520] ? get_unmapped_area+0x1f5/0x3f0 [ 31.557178] do_mmap+0x854/0xf00 [ 31.557704] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.558310] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.558999] ksys_mmap_pgoff+0x3af/0x500 [ 31.559605] do_syscall_64+0x3f/0x90 [ 31.560181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.560959] RIP: 0033:0x7fee2530dd82 [ 31.561517] 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 [ 31.564119] RSP: 002b:00007ffc0c9ff578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.565196] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee2530dd82 [ 31.566248] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee24747000 [ 31.567282] RBP: 00007fee24747000 R08: 0000000000000009 R09: 0000000000001000 [ 31.568312] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c3d3baec0 [ 31.569193] R13: 00007ffc0c9ff590 R14: 00007ffc0c9ff5c0 R15: 00007ffc0c9ff920 [ 31.570019] [ 31.570296] [ 31.570503] Allocated by task 213: [ 31.570909] kasan_save_stack+0x22/0x50 [ 31.571386] kasan_set_track+0x25/0x30 [ 31.571854] __kasan_slab_alloc+0x59/0x70 [ 31.572356] kmem_cache_alloc+0x16b/0x370 [ 31.572843] vm_area_dup+0x20/0x160 [ 31.573271] __split_vma+0x170/0x950 [ 31.573710] split_vma+0xc6/0x110 [ 31.574141] mprotect_fixup+0x8d2/0xb30 [ 31.574616] do_mprotect_pkey+0x87e/0xd40 [ 31.575115] __x64_sys_mprotect+0x78/0xc0 [ 31.575608] do_syscall_64+0x3f/0x90 [ 31.576062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.576677] [ 31.576882] Freed by task 213: [ 31.577256] kasan_save_stack+0x22/0x50 [ 31.577737] kasan_set_track+0x25/0x30 [ 31.578212] kasan_save_free_info+0x2b/0x50 [ 31.578713] __kasan_slab_free+0x10a/0x190 [ 31.579346] kmem_cache_free+0x10d/0x4d0 [ 31.579847] rcu_core+0x8c8/0x2860 [ 31.580286] __do_softirq+0x1b7/0x7d4 [ 31.580763] [ 31.580978] Last potentially related work creation: [ 31.581570] kasan_save_stack+0x22/0x50 [ 31.582061] __kasan_record_aux_stack+0x8e/0xa0 [ 31.582628] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.583275] remove_vma+0x139/0x170 [ 31.583720] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.584271] do_vmi_munmap+0x1f1/0x2b0 [ 31.584753] __vm_munmap+0x138/0x3a0 [ 31.585217] __x64_sys_munmap+0x59/0x80 [ 31.585707] do_syscall_64+0x3f/0x90 [ 31.586186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.586845] [ 31.587064] Second to last potentially related work creation: [ 31.587743] kasan_save_stack+0x22/0x50 [ 31.588242] __kasan_record_aux_stack+0x8e/0xa0 [ 31.588813] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.589460] remove_vma+0x139/0x170 [ 31.589929] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.590480] do_vmi_munmap+0x1f1/0x2b0 [ 31.590967] mmap_region+0x1f9/0x2660 [ 31.591426] do_mmap+0x854/0xf00 [ 31.591858] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.592345] ksys_mmap_pgoff+0x3af/0x500 [ 31.592844] do_syscall_64+0x3f/0x90 [ 31.593310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.593942] [ 31.594156] The buggy address belongs to the object at ffff88800e8c1488 [ 31.594156] which belongs to the cache vm_area_struct of size 168 [ 31.595626] The buggy address is located 88 bytes inside of [ 31.595626] freed 168-byte region [ffff88800e8c1488, ffff88800e8c1530) [ 31.597042] [ 31.597257] The buggy address belongs to the physical page: [ 31.597932] page:00000000b57761e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8c1 [ 31.599012] memcg:ffff88800fc17301 [ 31.599431] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.600080] page_type: 0xffffffff() [ 31.600531] raw: 0100000000000200 ffff8880087a0c80 ffffea000051b780 dead000000000002 [ 31.601439] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc17301 [ 31.602343] page dumped because: kasan: bad access detected [ 31.603002] [ 31.603218] Memory state around the buggy address: [ 31.603846] ffff88800e8c1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.604798] ffff88800e8c1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.605758] >ffff88800e8c1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.606705] ^ [ 31.607506] ffff88800e8c1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.608497] ffff88800e8c1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.609453] ================================================================== [ 31.610507] Disabling lock debugging due to kernel taint [ 34.103753] BUG: Bad rss-counter state mm:0000000019ecbe53 type:MM_FILEPAGES val:33 [ 34.104807] BUG: Bad rss-counter state mm:0000000019ecbe53 type:MM_ANONPAGES val:22 [ 34.617194] BUG: Bad rss-counter state mm:0000000066d18685 type:MM_FILEPAGES val:33 [ 34.618403] BUG: Bad rss-counter state mm:0000000066d18685 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24344' (ECDSA) to the list of known hosts. 2023/06/20 16:15:03 fuzzer started 2023/06/20 16:15:03 dialing manager at localhost:36067 2023/06/20 16:15:03 checking machine... 2023/06/20 16:15:03 checking revisions... [ 35.370796] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:15:03 testing simple program... [ 35.417777] cgroup: Unknown subsys name 'net' [ 35.455016] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:15:03 Registers: info registers vcpu 0 RAX=ffff8880182c9001 RBX=ffff88800cc81d10 RCX=00000000800d000b RDX=00000000800d000c RSI=ffff8880182c9e40 RDI=ffff88800844f780 RBP=ffff8880163a7c88 RSP=ffff8880163a7c70 R8 =00000000800d000b R9 =0000000000000000 R10=ffffea000060b240 R11=00000000800d000b R12=dffffc0000000000 R13=ffff8880182c9000 R14=ffff88800844f780 R15=0000000000000000 RIP=ffffffff818096c5 RFL=00000202 [-------] 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 00007f33e9167900 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=00007f33e971f0b0 CR3=0000000009e46000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f20a0a7c0f0 CR3=000000000db56000 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=2032303a35313a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a35313a3631203032 XMM08=00007efcc00159400000006a00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000