syzkaller login: [ 35.928299] BUG: Bad rss-counter state mm:000000006d5ac68e type:MM_FILEPAGES val:33 [ 35.929732] BUG: Bad rss-counter state mm:000000006d5ac68e type:MM_ANONPAGES val:22 [ 36.074905] ================================================================== [ 36.075793] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.076731] Read of size 8 at addr ffff88800c5015c8 by task sshd/220 [ 36.077488] [ 36.077706] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.078672] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.079646] Call Trace: [ 36.079964] [ 36.080266] dump_stack_lvl+0x91/0xf0 [ 36.080750] print_report+0xcc/0x620 [ 36.081232] ? __virt_addr_valid+0x102/0x340 [ 36.081778] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.082396] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.083000] kasan_report+0xbe/0xf0 [ 36.083470] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.084083] vma_interval_tree_remove+0xc75/0xec0 [ 36.084673] vma_prepare+0xc54/0x11a0 [ 36.085156] __split_vma+0x5af/0x950 [ 36.085624] ? __pfx___split_vma+0x10/0x10 [ 36.086165] ? find_held_lock+0x2c/0x110 [ 36.086689] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.087253] ? lock_is_held_type+0x9f/0x120 [ 36.087789] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.088395] ? mtree_range_walk+0x632/0x900 [ 36.088947] ? mas_walk+0x5c7/0x7c0 [ 36.089423] do_vmi_munmap+0x1f1/0x2b0 [ 36.089932] mmap_region+0x1f9/0x2660 [ 36.090412] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.090923] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.091628] ? __pfx_lock_acquire+0x10/0x10 [ 36.092163] ? __pfx_mmap_region+0x10/0x10 [ 36.092686] ? security_mmap_addr+0x7d/0xa0 [ 36.093219] ? get_unmapped_area+0x1f5/0x3f0 [ 36.093761] do_mmap+0x854/0xf00 [ 36.094201] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.094688] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.095239] ksys_mmap_pgoff+0x3af/0x500 [ 36.095739] do_syscall_64+0x3f/0x90 [ 36.096208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.096842] RIP: 0033:0x7fcd8d3d0d82 [ 36.097299] 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 [ 36.099394] RSP: 002b:00007fffc64e73b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.100291] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd8d3d0d82 [ 36.101126] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd8c80a000 [ 36.101984] RBP: 00007fcd8c80a000 R08: 0000000000000009 R09: 0000000000001000 [ 36.102811] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f394f8cf70 [ 36.103640] R13: 00007fffc64e73d0 R14: 00007fffc64e7400 R15: 00007fffc64e7760 [ 36.104484] [ 36.104770] [ 36.104984] Allocated by task 213: [ 36.105409] kasan_save_stack+0x22/0x50 [ 36.105917] kasan_set_track+0x25/0x30 [ 36.106409] __kasan_slab_alloc+0x59/0x70 [ 36.106922] kmem_cache_alloc+0x16b/0x370 [ 36.107432] vm_area_dup+0x20/0x160 [ 36.107883] __split_vma+0x170/0x950 [ 36.108342] split_vma+0xc6/0x110 [ 36.108775] mprotect_fixup+0x8d2/0xb30 [ 36.109287] do_mprotect_pkey+0x87e/0xd40 [ 36.109797] __x64_sys_mprotect+0x78/0xc0 [ 36.110334] do_syscall_64+0x3f/0x90 [ 36.110808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.111438] [ 36.111650] Freed by task 203: [ 36.112041] kasan_save_stack+0x22/0x50 [ 36.112537] kasan_set_track+0x25/0x30 [ 36.113024] kasan_save_free_info+0x2b/0x50 [ 36.113549] __kasan_slab_free+0x10a/0x190 [ 36.114096] kmem_cache_free+0x10d/0x4d0 [ 36.114597] rcu_core+0x8c8/0x2860 [ 36.115040] __do_softirq+0x1b7/0x7d4 [ 36.115511] [ 36.115724] Last potentially related work creation: [ 36.116303] kasan_save_stack+0x22/0x50 [ 36.116804] __kasan_record_aux_stack+0x8e/0xa0 [ 36.117375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.118019] remove_vma+0x139/0x170 [ 36.118462] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.119014] do_vmi_munmap+0x1f1/0x2b0 [ 36.119493] __vm_munmap+0x138/0x3a0 [ 36.119951] __x64_sys_munmap+0x59/0x80 [ 36.120438] do_syscall_64+0x3f/0x90 [ 36.120910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.121546] [ 36.121758] Second to last potentially related work creation: [ 36.122457] kasan_save_stack+0x22/0x50 [ 36.122954] __kasan_record_aux_stack+0x8e/0xa0 [ 36.123517] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.124162] remove_vma+0x139/0x170 [ 36.124608] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.125166] do_vmi_munmap+0x1f1/0x2b0 [ 36.125649] mmap_region+0x1f9/0x2660 [ 36.126123] do_mmap+0x854/0xf00 [ 36.126552] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.127031] ksys_mmap_pgoff+0x3af/0x500 [ 36.127532] do_syscall_64+0x3f/0x90 [ 36.128004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.128637] [ 36.128849] The buggy address belongs to the object at ffff88800c501570 [ 36.128849] which belongs to the cache vm_area_struct of size 168 [ 36.130322] The buggy address is located 88 bytes inside of [ 36.130322] freed 168-byte region [ffff88800c501570, ffff88800c501618) [ 36.131696] [ 36.131908] The buggy address belongs to the physical page: [ 36.132552] page:00000000db30c690 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc501 [ 36.133616] memcg:ffff8880180d1601 [ 36.134048] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.134693] page_type: 0xffffffff() [ 36.135151] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 36.136075] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880180d1601 [ 36.136989] page dumped because: kasan: bad access detected [ 36.137663] [ 36.137902] Memory state around the buggy address: [ 36.138494] ffff88800c501480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.139366] ffff88800c501500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 36.140231] >ffff88800c501580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.141086] ^ [ 36.141761] ffff88800c501600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 36.142619] ffff88800c501680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.143478] ================================================================== [ 36.144444] Disabling lock debugging due to kernel taint [ 37.680483] BUG: Bad rss-counter state mm:00000000bc98a62f type:MM_FILEPAGES val:33 [ 37.681286] BUG: Bad rss-counter state mm:00000000bc98a62f type:MM_ANONPAGES val:22 [ 38.093249] BUG: Bad rss-counter state mm:000000003370aa97 type:MM_FILEPAGES val:33 [ 38.094440] BUG: Bad rss-counter state mm:000000003370aa97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54837' (ECDSA) to the list of known hosts. 2023/06/20 08:36:36 fuzzer started 2023/06/20 08:36:36 dialing manager at localhost:44161 2023/06/20 08:36:36 checking machine... 2023/06/20 08:36:36 checking revisions... [ 38.750417] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:36:36 testing simple program... [ 38.788929] cgroup: Unknown subsys name 'net' [ 38.833706] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:36:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861cb336 RDX=0000000000000008 RSI=ffff888009effce0 RDI=ffff888009eff808 RBP=ffff888009eff860 RSP=ffff888009eff778 R8 =0000000000000001 R9 =ffff888009eff848 R10=0000000000038001 R11=00000000000397e7 R12=ffff888009eff868 R13=ffff888009eff850 R14=ffff888009effce0 R15=ffff888009eff808 RIP=ffffffff81130400 RFL=00000293 [--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 00007f1a70a06900 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=00007f1a70fbb650 CR3=000000000caf2000 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=0000000000000000 RBX=ffff88806cf39500 RCX=ffffffff812e00e5 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88806cf09e60 RBP=1ffff1100d9e13c8 RSP=ffff88806cf09e38 R8 =0000000000000001 R9 =ffffed100d9e13cc R10=0000000000000003 R11=ffff88806cf09ff8 R12=ffff88806cf39508 R13=ffff88806cf39510 R14=0000000000000000 R15=ffff88806cf39500 RIP=ffffffff812e00f6 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 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=00007ffdcbeeade8 CR3=000000000df2a000 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=2035333a36333a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a36333a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000