syzkaller login: [ 30.585894] BUG: Bad rss-counter state mm:000000007a91eb9a type:MM_FILEPAGES val:33 [ 30.587170] BUG: Bad rss-counter state mm:000000007a91eb9a type:MM_ANONPAGES val:22 [ 30.741713] ================================================================== [ 30.742628] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.743588] Read of size 8 at addr ffff888015f01880 by task sshd/221 [ 30.744346] [ 30.744563] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.745626] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.746610] Call Trace: [ 30.746928] [ 30.747234] dump_stack_lvl+0x91/0xf0 [ 30.747736] print_report+0xcc/0x620 [ 30.748223] ? __virt_addr_valid+0x102/0x340 [ 30.748785] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749407] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750019] kasan_report+0xbe/0xf0 [ 30.750500] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.751160] vma_interval_tree_remove+0xc75/0xec0 [ 30.751759] vma_prepare+0xc54/0x11a0 [ 30.752236] __split_vma+0x5af/0x950 [ 30.752702] ? __pfx___split_vma+0x10/0x10 [ 30.753230] ? find_held_lock+0x2c/0x110 [ 30.753754] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.754310] ? lock_is_held_type+0x9f/0x120 [ 30.754845] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.755468] ? mtree_range_walk+0x632/0x900 [ 30.756027] ? mas_walk+0x5c7/0x7c0 [ 30.756503] do_vmi_munmap+0x1f1/0x2b0 [ 30.757006] mmap_region+0x1f9/0x2660 [ 30.757481] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.758011] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.758747] ? __pfx_lock_acquire+0x10/0x10 [ 30.759296] ? __pfx_mmap_region+0x10/0x10 [ 30.759831] ? security_mmap_addr+0x7d/0xa0 [ 30.760369] ? get_unmapped_area+0x1f5/0x3f0 [ 30.760914] do_mmap+0x854/0xf00 [ 30.761351] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.761866] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.762434] ksys_mmap_pgoff+0x3af/0x500 [ 30.762955] do_syscall_64+0x3f/0x90 [ 30.763442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.764078] RIP: 0033:0x7fbff8fa1d82 [ 30.764537] 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 [ 30.766677] RSP: 002b:00007fff3af5a7c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.767586] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbff8fa1d82 [ 30.768430] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbff83db000 [ 30.769271] RBP: 00007fbff83db000 R08: 0000000000000009 R09: 0000000000001000 [ 30.770105] R10: 0000000000000812 R11: 0000000000000206 R12: 000056027c9f8ec0 [ 30.770947] R13: 00007fff3af5a7e0 R14: 00007fff3af5a810 R15: 00007fff3af5ab70 [ 30.771809] [ 30.772102] [ 30.772317] Allocated by task 214: [ 30.772741] kasan_save_stack+0x22/0x50 [ 30.773246] kasan_set_track+0x25/0x30 [ 30.773743] __kasan_slab_alloc+0x59/0x70 [ 30.774261] kmem_cache_alloc+0x16b/0x370 [ 30.774768] vm_area_dup+0x20/0x160 [ 30.775229] __split_vma+0x170/0x950 [ 30.775695] split_vma+0xc6/0x110 [ 30.776134] mprotect_fixup+0x8d2/0xb30 [ 30.776629] do_mprotect_pkey+0x87e/0xd40 [ 30.777192] __x64_sys_mprotect+0x78/0xc0 [ 30.777726] do_syscall_64+0x3f/0x90 [ 30.778192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.778833] [ 30.779049] Freed by task 214: [ 30.779463] kasan_save_stack+0x22/0x50 [ 30.779967] kasan_set_track+0x25/0x30 [ 30.780452] kasan_save_free_info+0x2b/0x50 [ 30.780985] __kasan_slab_free+0x10a/0x190 [ 30.781508] kmem_cache_free+0x10d/0x4d0 [ 30.782020] rcu_core+0x8c8/0x2860 [ 30.782458] __do_softirq+0x1b7/0x7d4 [ 30.782942] [ 30.783166] Last potentially related work creation: [ 30.783753] kasan_save_stack+0x22/0x50 [ 30.784248] __kasan_record_aux_stack+0x8e/0xa0 [ 30.784819] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.785457] remove_vma+0x139/0x170 [ 30.785908] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.786532] do_vmi_munmap+0x1f1/0x2b0 [ 30.787016] __vm_munmap+0x138/0x3a0 [ 30.787493] __x64_sys_munmap+0x59/0x80 [ 30.787993] do_syscall_64+0x3f/0x90 [ 30.788465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.789102] [ 30.789315] The buggy address belongs to the object at ffff888015f01828 [ 30.789315] which belongs to the cache vm_area_struct of size 168 [ 30.790788] The buggy address is located 88 bytes inside of [ 30.790788] freed 168-byte region [ffff888015f01828, ffff888015f018d0) [ 30.792236] [ 30.792449] The buggy address belongs to the physical page: [ 30.793108] page:000000006a48ecf9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f01 [ 30.794198] memcg:ffff88800e78a501 [ 30.794621] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.795279] page_type: 0xffffffff() [ 30.795728] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.796637] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e78a501 [ 30.797532] page dumped because: kasan: bad access detected [ 30.798191] [ 30.798402] Memory state around the buggy address: [ 30.798981] ffff888015f01780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.799844] ffff888015f01800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.800698] >ffff888015f01880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.801558] ^ [ 30.801971] ffff888015f01900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.802821] ffff888015f01980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 30.803686] ================================================================== [ 30.804679] Disabling lock debugging due to kernel taint [ 32.717772] BUG: Bad rss-counter state mm:00000000239cc10f type:MM_FILEPAGES val:33 [ 32.718504] BUG: Bad rss-counter state mm:00000000239cc10f type:MM_ANONPAGES val:22 [ 33.094576] BUG: Bad rss-counter state mm:00000000db6d5578 type:MM_FILEPAGES val:33 [ 33.095437] BUG: Bad rss-counter state mm:00000000db6d5578 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26502' (ECDSA) to the list of known hosts. 2023/06/20 21:24:37 fuzzer started 2023/06/20 21:24:37 dialing manager at localhost:36067 2023/06/20 21:24:37 checking machine... 2023/06/20 21:24:37 checking revisions... [ 33.746219] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:24:37 testing simple program... [ 33.790864] cgroup: Unknown subsys name 'net' [ 33.832389] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:24:37 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800f3e0b80 RCX=1ffff11001e7c22c RDX=1ffff11001e7c1b6 RSI=0000000000000004 RDI=ffff888008d77aa8 RBP=1ffff110011aef76 RSP=ffff888008d77b38 R8 =0000000000000001 R9 =ffffed10011aef55 R10=0000000000000003 R11=0000000000000000 R12=ffff88800f3e0d98 R13=000000000000526b R14=ffff88800f3e0000 R15=ffff88800f3e0b80 RIP=ffffffff8302b491 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=0000556e1e3a2b88 CR3=000000000e78c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fc2c1268190 CR3=0000000010386000 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=2037333a34323a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a34323a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000