syzkaller login: [ 39.780244] BUG: Bad rss-counter state mm:0000000017559f73 type:MM_FILEPAGES val:33 [ 39.781525] BUG: Bad rss-counter state mm:0000000017559f73 type:MM_ANONPAGES val:22 [ 39.950413] ================================================================== [ 39.951511] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.952503] Read of size 8 at addr ffff88800997c968 by task sshd/219 [ 39.953323] [ 39.953554] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.954468] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.955504] Call Trace: [ 39.955858] [ 39.956158] dump_stack_lvl+0x91/0xf0 [ 39.956675] print_report+0xcc/0x620 [ 39.957203] ? __virt_addr_valid+0x102/0x340 [ 39.957787] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.958438] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.959121] kasan_report+0xbe/0xf0 [ 39.959633] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.960296] vma_interval_tree_remove+0xc75/0xec0 [ 39.960943] vma_prepare+0xc54/0x11a0 [ 39.961471] __split_vma+0x5af/0x950 [ 39.961976] ? __pfx___split_vma+0x10/0x10 [ 39.962539] ? find_held_lock+0x2c/0x110 [ 39.963095] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.963699] ? lock_is_held_type+0x9f/0x120 [ 39.964274] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.964920] ? mtree_range_walk+0x632/0x900 [ 39.965511] ? mas_walk+0x5c7/0x7c0 [ 39.966017] do_vmi_munmap+0x1f1/0x2b0 [ 39.966538] mmap_region+0x1f9/0x2660 [ 39.967050] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.967596] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.968357] ? __pfx_lock_acquire+0x10/0x10 [ 39.968926] ? __pfx_mmap_region+0x10/0x10 [ 39.969505] ? security_mmap_addr+0x7d/0xa0 [ 39.970072] ? get_unmapped_area+0x1f5/0x3f0 [ 39.970662] do_mmap+0x854/0xf00 [ 39.971131] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.971661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.972263] ksys_mmap_pgoff+0x3af/0x500 [ 39.972809] do_syscall_64+0x3f/0x90 [ 39.973340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.974030] RIP: 0033:0x7fc2279ddd82 [ 39.974519] 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 [ 39.976790] RSP: 002b:00007ffe44eaed98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.977773] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc2279ddd82 [ 39.978680] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc226e17000 [ 39.979584] RBP: 00007fc226e17000 R08: 0000000000000009 R09: 0000000000001000 [ 39.980496] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a63a91f70 [ 39.981421] R13: 00007ffe44eaedb0 R14: 00007ffe44eaede0 R15: 00007ffe44eaf140 [ 39.982331] [ 39.982646] [ 39.982877] Allocated by task 212: [ 39.983332] kasan_save_stack+0x22/0x50 [ 39.983871] kasan_set_track+0x25/0x30 [ 39.984393] __kasan_slab_alloc+0x59/0x70 [ 39.984956] kmem_cache_alloc+0x16b/0x370 [ 39.985515] vm_area_dup+0x20/0x160 [ 39.986000] __split_vma+0x170/0x950 [ 39.986496] split_vma+0xc6/0x110 [ 39.986963] mprotect_fixup+0x8d2/0xb30 [ 39.987497] do_mprotect_pkey+0x87e/0xd40 [ 39.988054] __x64_sys_mprotect+0x78/0xc0 [ 39.988614] do_syscall_64+0x3f/0x90 [ 39.989124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.989808] [ 39.990038] Freed by task 203: [ 39.990456] kasan_save_stack+0x22/0x50 [ 39.990990] kasan_set_track+0x25/0x30 [ 39.991514] kasan_save_free_info+0x2b/0x50 [ 39.992085] __kasan_slab_free+0x10a/0x190 [ 39.992658] kmem_cache_free+0x10d/0x4d0 [ 39.993223] rcu_core+0x8c8/0x2860 [ 39.993701] __do_softirq+0x1b7/0x7d4 [ 39.994207] [ 39.994437] Last potentially related work creation: [ 39.995065] kasan_save_stack+0x22/0x50 [ 39.995602] __kasan_record_aux_stack+0x8e/0xa0 [ 39.996214] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.996901] remove_vma+0x139/0x170 [ 39.997390] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.997985] do_vmi_munmap+0x1f1/0x2b0 [ 39.998498] __vm_munmap+0x138/0x3a0 [ 39.999000] __x64_sys_munmap+0x59/0x80 [ 39.999531] do_syscall_64+0x3f/0x90 [ 40.000039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.000719] [ 40.000949] The buggy address belongs to the object at ffff88800997c910 [ 40.000949] which belongs to the cache vm_area_struct of size 168 [ 40.002569] The buggy address is located 88 bytes inside of [ 40.002569] freed 168-byte region [ffff88800997c910, ffff88800997c9b8) [ 40.004067] [ 40.004297] The buggy address belongs to the physical page: [ 40.005002] page:00000000feef6c70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x997c [ 40.006164] memcg:ffff8880097ad201 [ 40.006619] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.007364] page_type: 0xffffffff() [ 40.007848] raw: 0100000000000200 ffff88800879fc80 ffffea0000372800 dead000000000003 [ 40.008826] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097ad201 [ 40.009809] page dumped because: kasan: bad access detected [ 40.010519] [ 40.010748] Memory state around the buggy address: [ 40.011369] ffff88800997c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 40.012282] ffff88800997c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 40.013196] >ffff88800997c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.014095] ^ [ 40.014935] ffff88800997c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 40.015838] ffff88800997ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.016750] ================================================================== [ 40.017898] Disabling lock debugging due to kernel taint [ 42.070849] BUG: Bad rss-counter state mm:00000000f83419e6 type:MM_FILEPAGES val:33 [ 42.071826] BUG: Bad rss-counter state mm:00000000f83419e6 type:MM_ANONPAGES val:22 [ 42.500427] BUG: Bad rss-counter state mm:00000000f7570fdc type:MM_FILEPAGES val:33 [ 42.501441] BUG: Bad rss-counter state mm:00000000f7570fdc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61745' (ECDSA) to the list of known hosts. 2023/06/20 05:14:21 fuzzer started 2023/06/20 05:14:22 dialing manager at localhost:44161 2023/06/20 05:14:22 checking machine... 2023/06/20 05:14:22 checking revisions... [ 43.284878] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:14:22 testing simple program... [ 43.336090] cgroup: Unknown subsys name 'net' [ 43.412628] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:14:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888099d58b30 RCX=0000000000000100 RDX=ffff888016c3d1c0 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff88801462fcf0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6cb2 R12=ffffffff81845c80 R13=ffffea0000677180 R14=ffffffff813782a8 R15=ffff888019dc62e0 RIP=ffffffff8180c485 RFL=00000206 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f92ecb82900 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=00007ffbe29c9650 CR3=000000000e5de000 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=00000000000000000000000000000000 XMM02=000000000000000000ff000000000000 XMM03=006c616e72756f6a2f646d6574737973 XMM04=8487d23748d7064e00000000000ae988 XMM05=42f00d4f76ab16a60000000000135208 XMM06=806171799158d9670000000000133c88 XMM07=fb795ef6d657705600000000001244b0 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000001c1ecea6d4 RBX=0000000000000000 RCX=00000000000006e0 RDX=000000000000001c RSI=ffff88806cf28140 RDI=00000000000538b5 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ef258 R11=0000000000000001 R12=00000000000538b5 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000012 [----A--] 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=00007ffbe22fb000 CR3=0000000016f74000 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=2031323a34313a3530203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a34313a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000