syzkaller login: [ 39.622725] BUG: Bad rss-counter state mm:00000000211f10fc type:MM_FILEPAGES val:33 [ 39.623432] BUG: Bad rss-counter state mm:00000000211f10fc type:MM_ANONPAGES val:22 [ 39.743981] ================================================================== [ 39.744705] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.745387] Read of size 8 at addr ffff88800f21cb38 by task sshd/219 [ 39.745908] [ 39.746053] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.746631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.747284] Call Trace: [ 39.747504] [ 39.747695] dump_stack_lvl+0x91/0xf0 [ 39.748031] print_report+0xcc/0x620 [ 39.748484] ? __virt_addr_valid+0x102/0x340 [ 39.748874] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.749294] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.749706] kasan_report+0xbe/0xf0 [ 39.750019] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.750431] vma_interval_tree_remove+0xc75/0xec0 [ 39.750852] vma_prepare+0xc54/0x11a0 [ 39.751166] __split_vma+0x5af/0x950 [ 39.751475] ? __pfx___split_vma+0x10/0x10 [ 39.751833] ? find_held_lock+0x2c/0x110 [ 39.752182] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.752554] ? lock_is_held_type+0x9f/0x120 [ 39.752906] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.753340] ? mtree_range_walk+0x632/0x900 [ 39.753703] ? mas_walk+0x5c7/0x7c0 [ 39.754020] do_vmi_munmap+0x1f1/0x2b0 [ 39.754350] mmap_region+0x1f9/0x2660 [ 39.754681] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.755031] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.755505] ? __pfx_lock_acquire+0x10/0x10 [ 39.755849] ? __pfx_mmap_region+0x10/0x10 [ 39.756195] ? security_mmap_addr+0x7d/0xa0 [ 39.756562] ? get_unmapped_area+0x1f5/0x3f0 [ 39.756930] do_mmap+0x854/0xf00 [ 39.757235] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.757565] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.757927] ksys_mmap_pgoff+0x3af/0x500 [ 39.758258] do_syscall_64+0x3f/0x90 [ 39.758576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.759000] RIP: 0033:0x7f6288eabd82 [ 39.759296] 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 [ 39.760698] RSP: 002b:00007fff67cac2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.761341] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6288eabd82 [ 39.761914] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62882e5000 [ 39.762496] RBP: 00007f62882e5000 R08: 0000000000000009 R09: 0000000000001000 [ 39.763077] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560453af7ec0 [ 39.763651] R13: 00007fff67cac310 R14: 00007fff67cac340 R15: 00007fff67cac6a0 [ 39.764248] [ 39.764447] [ 39.764593] Allocated by task 212: [ 39.764884] kasan_save_stack+0x22/0x50 [ 39.765286] kasan_set_track+0x25/0x30 [ 39.765616] __kasan_slab_alloc+0x59/0x70 [ 39.765965] kmem_cache_alloc+0x16b/0x370 [ 39.766313] vm_area_dup+0x20/0x160 [ 39.766623] __split_vma+0x170/0x950 [ 39.766948] split_vma+0xc6/0x110 [ 39.767246] mprotect_fixup+0x8d2/0xb30 [ 39.767574] do_mprotect_pkey+0x87e/0xd40 [ 39.767924] __x64_sys_mprotect+0x78/0xc0 [ 39.768282] do_syscall_64+0x3f/0x90 [ 39.768595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.769032] [ 39.769204] Freed by task 203: [ 39.769471] kasan_save_stack+0x22/0x50 [ 39.769813] kasan_set_track+0x25/0x30 [ 39.770149] kasan_save_free_info+0x2b/0x50 [ 39.770511] __kasan_slab_free+0x10a/0x190 [ 39.770869] kmem_cache_free+0x10d/0x4d0 [ 39.771222] rcu_core+0x8c8/0x2860 [ 39.771527] __do_softirq+0x1b7/0x7d4 [ 39.771846] [ 39.771990] Last potentially related work creation: [ 39.772390] kasan_save_stack+0x22/0x50 [ 39.772730] __kasan_record_aux_stack+0x8e/0xa0 [ 39.773135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.773577] remove_vma+0x139/0x170 [ 39.773882] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.774257] do_vmi_munmap+0x1f1/0x2b0 [ 39.774576] __vm_munmap+0x138/0x3a0 [ 39.774897] __x64_sys_munmap+0x59/0x80 [ 39.775230] do_syscall_64+0x3f/0x90 [ 39.775546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.775986] [ 39.776134] The buggy address belongs to the object at ffff88800f21cae0 [ 39.776134] which belongs to the cache vm_area_struct of size 168 [ 39.777159] The buggy address is located 88 bytes inside of [ 39.777159] freed 168-byte region [ffff88800f21cae0, ffff88800f21cb88) [ 39.778116] [ 39.778267] The buggy address belongs to the physical page: [ 39.778720] page:00000000d7c16843 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf21c [ 39.779486] memcg:ffff88800cf48001 [ 39.779777] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.780223] page_type: 0xffffffff() [ 39.780529] raw: 0100000000000200 ffff88800879fc80 ffffea0000386a00 dead000000000008 [ 39.781189] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf48001 [ 39.781803] page dumped because: kasan: bad access detected [ 39.782245] [ 39.782389] Memory state around the buggy address: [ 39.782798] ffff88800f21ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.783391] ffff88800f21ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.783977] >ffff88800f21cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.784559] ^ [ 39.784967] ffff88800f21cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.785572] ffff88800f21cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.786149] ================================================================== [ 39.787087] Disabling lock debugging due to kernel taint [ 41.753063] BUG: Bad rss-counter state mm:0000000070bd576f type:MM_FILEPAGES val:33 [ 41.754116] BUG: Bad rss-counter state mm:0000000070bd576f type:MM_ANONPAGES val:22 [ 42.110602] BUG: Bad rss-counter state mm:000000002dc60c43 type:MM_FILEPAGES val:33 [ 42.111371] BUG: Bad rss-counter state mm:000000002dc60c43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31849' (ECDSA) to the list of known hosts. 2023/06/20 08:58:06 fuzzer started 2023/06/20 08:58:07 dialing manager at localhost:44161 2023/06/20 08:58:07 checking machine... 2023/06/20 08:58:07 checking revisions... [ 42.690824] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:58:07 testing simple program... [ 42.725346] cgroup: Unknown subsys name 'net' [ 42.774979] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:58:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000287 RCX=ffffffff812e00e5 RDX=1ffff11001b13913 RSI=ffffffff845136aa RDI=ffffffff856d8238 RBP=ffffffff856d8220 RSP=ffff88806ce09dd0 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=0000000000000000 R12=0000000000000287 R13=ffff88800e0129c8 R14=ffffffff813782a8 R15=ffff888018e2a7e8 RIP=ffffffff812d8614 RFL=00000082 [--S----] 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=00005571d4c61290 CR3=000000001582a000 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=2036303a38353a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a38353a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fb82719d890 CR3=000000000d9ae000 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=00000000000000000000000000000000 XMM01=ed431f484f94bd9de4498aaab6778050 XMM02=000000000011de08ec2efd57dc4c00df XMM03=000000000012401092e8eb6b21c2d079 XMM04=fd30b758d0885c2c00000000000ae988 XMM05=dfcdbad4f1609c370000000000133840 XMM06=242a7e48150ac6a20000000000132a18 XMM07=e042d86d42eb936e0000000000124290 XMM08=92e8eb6b21c2d079000000000011de68 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000