syzkaller login: [ 38.703691] BUG: Bad rss-counter state mm:00000000f0d7e230 type:MM_FILEPAGES val:33 [ 38.705553] BUG: Bad rss-counter state mm:00000000f0d7e230 type:MM_ANONPAGES val:22 [ 38.869919] ================================================================== [ 38.870853] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.871836] Read of size 8 at addr ffff88800fd6f798 by task sshd/226 [ 38.872798] [ 38.873026] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.873917] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.874904] Call Trace: [ 38.875277] [ 38.875564] dump_stack_lvl+0x91/0xf0 [ 38.876074] print_report+0xcc/0x620 [ 38.876570] ? __virt_addr_valid+0x102/0x340 [ 38.877131] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.877801] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.878439] kasan_report+0xbe/0xf0 [ 38.878930] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.879604] vma_interval_tree_remove+0xc75/0xec0 [ 38.880213] vma_prepare+0xc54/0x11a0 [ 38.880698] __split_vma+0x5af/0x950 [ 38.881176] ? __pfx___split_vma+0x10/0x10 [ 38.881726] ? find_held_lock+0x2c/0x110 [ 38.882251] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.882828] ? lock_is_held_type+0x9f/0x120 [ 38.883412] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.884026] ? mtree_range_walk+0x632/0x900 [ 38.884587] ? mas_walk+0x5c7/0x7c0 [ 38.885075] do_vmi_munmap+0x1f1/0x2b0 [ 38.885592] mmap_region+0x1f9/0x2660 [ 38.886081] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.886593] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.887346] ? __pfx_lock_acquire+0x10/0x10 [ 38.887895] ? __pfx_mmap_region+0x10/0x10 [ 38.888432] ? security_mmap_addr+0x7d/0xa0 [ 38.888973] ? get_unmapped_area+0x1f5/0x3f0 [ 38.889556] do_mmap+0x854/0xf00 [ 38.890003] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.890510] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.891135] ksys_mmap_pgoff+0x3af/0x500 [ 38.891685] do_syscall_64+0x3f/0x90 [ 38.892171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.892789] RIP: 0033:0x7f7e4614dd82 [ 38.893225] 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 [ 38.895293] RSP: 002b:00007fff4ab24bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.896255] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e4614dd82 [ 38.897080] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e45587000 [ 38.897905] RBP: 00007f7e45587000 R08: 0000000000000009 R09: 0000000000001000 [ 38.898707] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4cee37ec0 [ 38.899536] R13: 00007fff4ab24bf0 R14: 00007fff4ab24c20 R15: 00007fff4ab24f80 [ 38.900392] [ 38.900678] [ 38.900891] Allocated by task 219: [ 38.901332] kasan_save_stack+0x22/0x50 [ 38.901838] kasan_set_track+0x25/0x30 [ 38.902334] __kasan_slab_alloc+0x59/0x70 [ 38.902849] kmem_cache_alloc+0x16b/0x370 [ 38.903419] vm_area_dup+0x20/0x160 [ 38.903873] __split_vma+0x170/0x950 [ 38.904345] split_vma+0xc6/0x110 [ 38.904781] mprotect_fixup+0x8d2/0xb30 [ 38.905298] do_mprotect_pkey+0x87e/0xd40 [ 38.905799] __x64_sys_mprotect+0x78/0xc0 [ 38.906322] do_syscall_64+0x3f/0x90 [ 38.906790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.907469] [ 38.907681] Freed by task 19: [ 38.908058] kasan_save_stack+0x22/0x50 [ 38.908558] kasan_set_track+0x25/0x30 [ 38.909054] kasan_save_free_info+0x2b/0x50 [ 38.909597] __kasan_slab_free+0x10a/0x190 [ 38.910105] kmem_cache_free+0x10d/0x4d0 [ 38.910598] rcu_core+0x8c8/0x2860 [ 38.911040] __do_softirq+0x1b7/0x7d4 [ 38.911551] [ 38.911760] Last potentially related work creation: [ 38.912343] kasan_save_stack+0x22/0x50 [ 38.912847] __kasan_record_aux_stack+0x8e/0xa0 [ 38.913505] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.914147] remove_vma+0x139/0x170 [ 38.914595] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.915184] do_vmi_munmap+0x1f1/0x2b0 [ 38.915653] __vm_munmap+0x138/0x3a0 [ 38.916105] __x64_sys_munmap+0x59/0x80 [ 38.916585] do_syscall_64+0x3f/0x90 [ 38.917044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917703] [ 38.917911] The buggy address belongs to the object at ffff88800fd6f740 [ 38.917911] which belongs to the cache vm_area_struct of size 168 [ 38.919407] The buggy address is located 88 bytes inside of [ 38.919407] freed 168-byte region [ffff88800fd6f740, ffff88800fd6f7e8) [ 38.920780] [ 38.920988] The buggy address belongs to the physical page: [ 38.921664] page:00000000cb5a6e8d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd6f [ 38.922758] memcg:ffff888016b22c01 [ 38.923216] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.923873] page_type: 0xffffffff() [ 38.924327] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.925253] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b22c01 [ 38.926197] page dumped because: kasan: bad access detected [ 38.926869] [ 38.927093] Memory state around the buggy address: [ 38.927700] ffff88800fd6f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.928571] ffff88800fd6f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.929498] >ffff88800fd6f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.930388] ^ [ 38.930905] ffff88800fd6f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.931832] ffff88800fd6f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.932724] ================================================================== [ 38.933725] Disabling lock debugging due to kernel taint [ 41.620193] BUG: Bad rss-counter state mm:000000000655b186 type:MM_FILEPAGES val:33 [ 41.621172] BUG: Bad rss-counter state mm:000000000655b186 type:MM_ANONPAGES val:22 [ 42.091481] BUG: Bad rss-counter state mm:00000000aec92fdf type:MM_FILEPAGES val:33 [ 42.092527] BUG: Bad rss-counter state mm:00000000aec92fdf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1731' (ECDSA) to the list of known hosts. 2023/06/21 04:25:09 fuzzer started 2023/06/21 04:25:10 dialing manager at localhost:36067 2023/06/21 04:25:10 checking machine... 2023/06/21 04:25:10 checking revisions... [ 42.842178] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:25:10 testing simple program... [ 42.890733] cgroup: Unknown subsys name 'net' [ 42.934546] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:25:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806cf39500 RCX=00000009cb53ef13 RDX=1ffff1100d9e4fdd RSI=0000000000000006 RDI=ffffffff852c7908 RBP=ffff88806cf27ee8 RSP=ffff88806ce09c58 R8 =ffff88806cf39f40 R9 =ffffed100d9c1385 R10=0000000000000003 R11=ffff888008c04000 R12=00000000002fc000 R13=0000000000000001 R14=ffff88806cf39f08 R15=ffff888016b751c0 RIP=ffffffff81236217 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 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=00007fdc85fb1650 CR3=000000000cbb4000 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=2039303a35323a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3533 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3533325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a35323a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864ec930 RBP=ffff8880147bfaf0 RSP=ffff8880147bf9d8 R8 =0000000000000000 R9 =ffff8880147bfad8 R10=0000000000038001 R11=0000000000006097 R12=ffff8880147bfaf8 R13=ffff8880147bfae0 R14=ffff8880147bfad9 R15=ffff8880147bfa98 RIP=ffffffff8113078b 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 00007f20e23e8900 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=00007f20e1850260 CR3=000000000c4f8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9de1139b46e58dde00000000000ae988 XMM05=34177ea16837cc830000000000133090 XMM06=13e856d8d71426c80000000000131b10 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000