syzkaller login: [ 38.749824] BUG: Bad rss-counter state mm:000000004f361003 type:MM_FILEPAGES val:33 [ 38.751077] BUG: Bad rss-counter state mm:000000004f361003 type:MM_ANONPAGES val:22 [ 38.895404] ================================================================== [ 38.896321] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.897266] Read of size 8 at addr ffff88800e9dbdf0 by task sshd/218 [ 38.898138] [ 38.898360] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.899236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.900225] Call Trace: [ 38.900541] [ 38.900827] dump_stack_lvl+0x91/0xf0 [ 38.901318] print_report+0xcc/0x620 [ 38.901798] ? __virt_addr_valid+0x102/0x340 [ 38.902346] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.902981] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.903598] kasan_report+0xbe/0xf0 [ 38.904072] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.904714] vma_interval_tree_remove+0xc75/0xec0 [ 38.905340] vma_prepare+0xc54/0x11a0 [ 38.905816] __split_vma+0x5af/0x950 [ 38.906287] ? __pfx___split_vma+0x10/0x10 [ 38.906817] ? find_held_lock+0x2c/0x110 [ 38.907333] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.907895] ? lock_is_held_type+0x9f/0x120 [ 38.908429] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.909031] ? mtree_range_walk+0x632/0x900 [ 38.909586] ? mas_walk+0x5c7/0x7c0 [ 38.910062] do_vmi_munmap+0x1f1/0x2b0 [ 38.910555] mmap_region+0x1f9/0x2660 [ 38.911046] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.911560] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.912274] ? __pfx_lock_acquire+0x10/0x10 [ 38.912801] ? __pfx_mmap_region+0x10/0x10 [ 38.913335] ? security_mmap_addr+0x7d/0xa0 [ 38.913866] ? get_unmapped_area+0x1f5/0x3f0 [ 38.914422] do_mmap+0x854/0xf00 [ 38.914881] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.915378] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.915941] ksys_mmap_pgoff+0x3af/0x500 [ 38.916448] do_syscall_64+0x3f/0x90 [ 38.916930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917572] RIP: 0033:0x7fce71e1fd82 [ 38.918031] 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 [ 38.920148] RSP: 002b:00007ffea8ddbc28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.921056] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce71e1fd82 [ 38.921921] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce71259000 [ 38.922787] RBP: 00007fce71259000 R08: 0000000000000009 R09: 0000000000001000 [ 38.923629] R10: 0000000000000812 R11: 0000000000000206 R12: 00005574c0377980 [ 38.924472] R13: 00007ffea8ddbc40 R14: 00007ffea8ddbc70 R15: 00007ffea8ddbfd0 [ 38.925325] [ 38.925617] [ 38.925829] Allocated by task 211: [ 38.926257] kasan_save_stack+0x22/0x50 [ 38.926774] kasan_set_track+0x25/0x30 [ 38.927263] __kasan_slab_alloc+0x59/0x70 [ 38.927781] kmem_cache_alloc+0x16b/0x370 [ 38.928294] vm_area_dup+0x20/0x160 [ 38.928750] __split_vma+0x170/0x950 [ 38.929213] split_vma+0xc6/0x110 [ 38.929645] mprotect_fixup+0x8d2/0xb30 [ 38.930144] do_mprotect_pkey+0x87e/0xd40 [ 38.930679] __x64_sys_mprotect+0x78/0xc0 [ 38.931202] do_syscall_64+0x3f/0x90 [ 38.931676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932319] [ 38.932543] Freed by task 211: [ 38.932948] kasan_save_stack+0x22/0x50 [ 38.933450] kasan_set_track+0x25/0x30 [ 38.933945] kasan_save_free_info+0x2b/0x50 [ 38.934477] __kasan_slab_free+0x10a/0x190 [ 38.935011] kmem_cache_free+0x10d/0x4d0 [ 38.935521] rcu_core+0x8c8/0x2860 [ 38.935961] __do_softirq+0x1b7/0x7d4 [ 38.936440] [ 38.936656] Last potentially related work creation: [ 38.937237] kasan_save_stack+0x22/0x50 [ 38.937734] __kasan_record_aux_stack+0x8e/0xa0 [ 38.938326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.938980] remove_vma+0x139/0x170 [ 38.939430] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.939985] do_vmi_munmap+0x1f1/0x2b0 [ 38.940467] __vm_munmap+0x138/0x3a0 [ 38.940931] __x64_sys_munmap+0x59/0x80 [ 38.941425] do_syscall_64+0x3f/0x90 [ 38.941896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.942537] [ 38.942773] Second to last potentially related work creation: [ 38.943457] kasan_save_stack+0x22/0x50 [ 38.943956] __kasan_record_aux_stack+0x8e/0xa0 [ 38.944527] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.945173] remove_vma+0x139/0x170 [ 38.945622] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.946173] do_vmi_munmap+0x1f1/0x2b0 [ 38.946666] mmap_region+0x1f9/0x2660 [ 38.947142] do_mmap+0x854/0xf00 [ 38.947570] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.948054] ksys_mmap_pgoff+0x7d/0x500 [ 38.948549] do_syscall_64+0x3f/0x90 [ 38.949019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949657] [ 38.949870] The buggy address belongs to the object at ffff88800e9dbd98 [ 38.949870] which belongs to the cache vm_area_struct of size 168 [ 38.951351] The buggy address is located 88 bytes inside of [ 38.951351] freed 168-byte region [ffff88800e9dbd98, ffff88800e9dbe40) [ 38.952750] [ 38.952964] The buggy address belongs to the physical page: [ 38.953619] page:00000000e8767088 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9db [ 38.954702] memcg:ffff8880164f8c01 [ 38.955130] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.955772] page_type: 0xffffffff() [ 38.956221] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a34c0 dead000000000002 [ 38.957136] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164f8c01 [ 38.958041] page dumped because: kasan: bad access detected [ 38.958703] [ 38.958923] Memory state around the buggy address: [ 38.959496] ffff88800e9dbc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.960347] ffff88800e9dbd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.961190] >ffff88800e9dbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.962038] ^ [ 38.962863] ffff88800e9dbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.963712] ffff88800e9dbe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.964556] ================================================================== [ 38.965644] Disabling lock debugging due to kernel taint [ 40.954935] BUG: Bad rss-counter state mm:000000001752906e type:MM_FILEPAGES val:33 [ 40.956239] BUG: Bad rss-counter state mm:000000001752906e type:MM_ANONPAGES val:22 [ 41.435545] BUG: Bad rss-counter state mm:00000000d988e4d7 type:MM_FILEPAGES val:33 [ 41.437301] BUG: Bad rss-counter state mm:00000000d988e4d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15752' (ECDSA) to the list of known hosts. 2023/06/21 00:52:13 fuzzer started 2023/06/21 00:52:13 dialing manager at localhost:36067 2023/06/21 00:52:13 checking machine... 2023/06/21 00:52:13 checking revisions... [ 42.210585] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:52:14 testing simple program... [ 42.264045] cgroup: Unknown subsys name 'net' [ 42.320350] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:52:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000c8c352f RCX=0000000000000000 RDX=1ffff1100205b4c1 RSI=ffffffff818dd751 RDI=ffff8880102da610 RBP=ffff88801431fbc0 RSP=ffff88801431fb28 R8 =0000000000000004 R9 =000000000000e3fc R10=000000000000e3fc R11=0000000000000001 R12=00000000649249bd R13=ffff8880102da000 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff818dd791 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 00007f9c00f2a900 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=00007f9c014df650 CR3=000000000eda4000 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=00007ffd583ccde8 CR3=00000000195f6000 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=2033313a32353a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a32353a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000