syzkaller login: [ 28.691028] BUG: Bad rss-counter state mm:000000002a8c2f8d type:MM_FILEPAGES val:33 [ 28.692968] BUG: Bad rss-counter state mm:000000002a8c2f8d type:MM_ANONPAGES val:22 [ 28.861540] ================================================================== [ 28.862507] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.863498] Read of size 8 at addr ffff88800e99f140 by task sshd/219 [ 28.864411] [ 28.864644] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.865543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.866590] Call Trace: [ 28.866956] [ 28.867251] dump_stack_lvl+0x91/0xf0 [ 28.867763] print_report+0xcc/0x620 [ 28.868263] ? __virt_addr_valid+0x102/0x340 [ 28.868843] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.869488] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.870138] kasan_report+0xbe/0xf0 [ 28.870644] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.871311] vma_interval_tree_remove+0xc75/0xec0 [ 28.871948] vma_prepare+0xc54/0x11a0 [ 28.872453] __split_vma+0x5af/0x950 [ 28.872953] ? __pfx___split_vma+0x10/0x10 [ 28.873513] ? find_held_lock+0x2c/0x110 [ 28.874057] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.874649] ? lock_is_held_type+0x9f/0x120 [ 28.875234] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.875873] ? mtree_range_walk+0x632/0x900 [ 28.876456] ? mas_walk+0x5c7/0x7c0 [ 28.876952] do_vmi_munmap+0x1f1/0x2b0 [ 28.877486] mmap_region+0x1f9/0x2660 [ 28.877998] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.878526] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.879282] ? __pfx_lock_acquire+0x10/0x10 [ 28.879836] ? __pfx_mmap_region+0x10/0x10 [ 28.880393] ? security_mmap_addr+0x7d/0xa0 [ 28.880945] ? get_unmapped_area+0x1f5/0x3f0 [ 28.881524] do_mmap+0x854/0xf00 [ 28.881976] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.882494] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.883104] ksys_mmap_pgoff+0x3af/0x500 [ 28.883651] do_syscall_64+0x3f/0x90 [ 28.884163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.884838] RIP: 0033:0x7f546d1f0d82 [ 28.885312] 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 [ 28.887595] RSP: 002b:00007fff1ffe8348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.888543] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f546d1f0d82 [ 28.889441] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f546c62a000 [ 28.890334] RBP: 00007f546c62a000 R08: 0000000000000009 R09: 0000000000001000 [ 28.891224] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e3ea25ec0 [ 28.892115] R13: 00007fff1ffe8360 R14: 00007fff1ffe8390 R15: 00007fff1ffe86f0 [ 28.893018] [ 28.893329] [ 28.893558] Allocated by task 212: [ 28.894008] kasan_save_stack+0x22/0x50 [ 28.894531] kasan_set_track+0x25/0x30 [ 28.895061] __kasan_slab_alloc+0x59/0x70 [ 28.895606] kmem_cache_alloc+0x16b/0x370 [ 28.896129] vm_area_dup+0x20/0x160 [ 28.896579] __split_vma+0x170/0x950 [ 28.897049] split_vma+0xc6/0x110 [ 28.897494] mprotect_fixup+0x8d2/0xb30 [ 28.898005] do_mprotect_pkey+0x87e/0xd40 [ 28.898531] __x64_sys_mprotect+0x78/0xc0 [ 28.899080] do_syscall_64+0x3f/0x90 [ 28.899573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.900213] [ 28.900429] Freed by task 212: [ 28.900825] kasan_save_stack+0x22/0x50 [ 28.901329] kasan_set_track+0x25/0x30 [ 28.901834] kasan_save_free_info+0x2b/0x50 [ 28.902372] __kasan_slab_free+0x10a/0x190 [ 28.902916] kmem_cache_free+0x10d/0x4d0 [ 28.903435] rcu_core+0x8c8/0x2860 [ 28.903881] __do_softirq+0x1b7/0x7d4 [ 28.904362] [ 28.904587] Last potentially related work creation: [ 28.905170] kasan_save_stack+0x22/0x50 [ 28.905672] __kasan_record_aux_stack+0x8e/0xa0 [ 28.906243] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.906884] remove_vma+0x139/0x170 [ 28.907344] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.907899] do_vmi_munmap+0x1f1/0x2b0 [ 28.908380] __vm_munmap+0x138/0x3a0 [ 28.908852] __x64_sys_munmap+0x59/0x80 [ 28.909350] do_syscall_64+0x3f/0x90 [ 28.909818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.910461] [ 28.910683] Second to last potentially related work creation: [ 28.911383] kasan_save_stack+0x22/0x50 [ 28.911881] __kasan_record_aux_stack+0x8e/0xa0 [ 28.912475] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.913121] remove_vma+0x139/0x170 [ 28.913578] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.914148] do_vmi_munmap+0x1f1/0x2b0 [ 28.914640] mmap_region+0x1f9/0x2660 [ 28.915119] do_mmap+0x854/0xf00 [ 28.915564] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.916056] ksys_mmap_pgoff+0x3af/0x500 [ 28.916559] do_syscall_64+0x3f/0x90 [ 28.917043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.917706] [ 28.917921] The buggy address belongs to the object at ffff88800e99f0e8 [ 28.917921] which belongs to the cache vm_area_struct of size 168 [ 28.919438] The buggy address is located 88 bytes inside of [ 28.919438] freed 168-byte region [ffff88800e99f0e8, ffff88800e99f190) [ 28.920863] [ 28.921079] The buggy address belongs to the physical page: [ 28.921747] page:000000003589347a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe99f [ 28.922843] memcg:ffff88800cb62801 [ 28.923270] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.923965] page_type: 0xffffffff() [ 28.924424] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a5680 dead000000000005 [ 28.925354] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb62801 [ 28.926260] page dumped because: kasan: bad access detected [ 28.926936] [ 28.927153] Memory state around the buggy address: [ 28.927732] ffff88800e99f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.928595] ffff88800e99f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 28.929459] >ffff88800e99f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.930328] ^ [ 28.930971] ffff88800e99f180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 28.931829] ffff88800e99f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 28.932676] ================================================================== [ 28.933740] Disabling lock debugging due to kernel taint [ 30.780766] BUG: Bad rss-counter state mm:000000001e823f70 type:MM_FILEPAGES val:33 [ 30.781627] BUG: Bad rss-counter state mm:000000001e823f70 type:MM_ANONPAGES val:22 [ 31.342521] BUG: Bad rss-counter state mm:000000003d6848fc type:MM_FILEPAGES val:33 [ 31.343690] BUG: Bad rss-counter state mm:000000003d6848fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56513' (ECDSA) to the list of known hosts. 2023/06/21 00:51:25 fuzzer started 2023/06/21 00:51:25 dialing manager at localhost:36067 2023/06/21 00:51:25 checking machine... 2023/06/21 00:51:25 checking revisions... [ 31.976911] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:51:25 testing simple program... [ 32.030345] cgroup: Unknown subsys name 'net' [ 32.089688] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:51:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00005641445d5050 CR3=000000000fc40000 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=2034323a31353a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31353a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864135ba RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880142df530 RSP=ffff8880142df468 R8 =ffffffff864135be R9 =ffff8880142df518 R10=0000000000038001 R11=000000000009a973 R12=ffff8880142df538 R13=ffff8880142df520 R14=ffff8880142df9a0 R15=ffff8880142df4d8 RIP=ffffffff81131153 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 00007f4d94f11900 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=00007f21415c3650 CR3=000000000b844000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=340186c8f42d826900000000000ae988 XMM05=8376aaf7c16f993d00000000001357e0 XMM06=4fda316b135da52b00000000001345d0 XMM07=fb795ef6d65770560000000000122e20 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000