syzkaller login: [ 30.575003] BUG: Bad rss-counter state mm:00000000f69f2687 type:MM_FILEPAGES val:33 [ 30.576281] BUG: Bad rss-counter state mm:00000000f69f2687 type:MM_ANONPAGES val:22 [ 30.740575] ================================================================== [ 30.741589] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.742631] Read of size 8 at addr ffff888018ddc3f8 by task sshd/219 [ 30.743493] [ 30.743817] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.744744] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.745713] Call Trace: [ 30.746044] [ 30.746333] dump_stack_lvl+0x91/0xf0 [ 30.746827] print_report+0xcc/0x620 [ 30.747308] ? __virt_addr_valid+0x102/0x340 [ 30.747869] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.748505] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749121] kasan_report+0xbe/0xf0 [ 30.749599] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750223] vma_interval_tree_remove+0xc75/0xec0 [ 30.750823] vma_prepare+0xc54/0x11a0 [ 30.751302] __split_vma+0x5af/0x950 [ 30.751766] ? __pfx___split_vma+0x10/0x10 [ 30.752289] ? find_held_lock+0x2c/0x110 [ 30.752833] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.753398] ? lock_is_held_type+0x9f/0x120 [ 30.753935] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.754533] ? mtree_range_walk+0x632/0x900 [ 30.755081] ? mas_walk+0x5c7/0x7c0 [ 30.755553] do_vmi_munmap+0x1f1/0x2b0 [ 30.756049] mmap_region+0x1f9/0x2660 [ 30.756541] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.757049] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.757757] ? __pfx_lock_acquire+0x10/0x10 [ 30.758287] ? __pfx_mmap_region+0x10/0x10 [ 30.758822] ? security_mmap_addr+0x7d/0xa0 [ 30.759353] ? get_unmapped_area+0x1f5/0x3f0 [ 30.759899] do_mmap+0x854/0xf00 [ 30.760341] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.760862] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.761428] ksys_mmap_pgoff+0x3af/0x500 [ 30.761936] do_syscall_64+0x3f/0x90 [ 30.762409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.763051] RIP: 0033:0x7f497cb83d82 [ 30.763509] 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 [ 30.765629] RSP: 002b:00007ffeba48a0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.766522] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f497cb83d82 [ 30.767365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f497bfbd000 [ 30.768240] RBP: 00007f497bfbd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.769127] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556486fb7d90 [ 30.770003] R13: 00007ffeba48a110 R14: 00007ffeba48a140 R15: 00007ffeba48a4a0 [ 30.770889] [ 30.771192] [ 30.771436] Allocated by task 212: [ 30.771873] kasan_save_stack+0x22/0x50 [ 30.772393] kasan_set_track+0x25/0x30 [ 30.772914] __kasan_slab_alloc+0x59/0x70 [ 30.773448] kmem_cache_alloc+0x16b/0x370 [ 30.773975] vm_area_dup+0x20/0x160 [ 30.774448] __split_vma+0x170/0x950 [ 30.774922] split_vma+0xc6/0x110 [ 30.775376] mprotect_fixup+0x8d2/0xb30 [ 30.775891] do_mprotect_pkey+0x87e/0xd40 [ 30.776432] __x64_sys_mprotect+0x78/0xc0 [ 30.776973] do_syscall_64+0x3f/0x90 [ 30.777465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.778123] [ 30.778342] Freed by task 212: [ 30.778744] kasan_save_stack+0x22/0x50 [ 30.779267] kasan_set_track+0x25/0x30 [ 30.779775] kasan_save_free_info+0x2b/0x50 [ 30.780323] __kasan_slab_free+0x10a/0x190 [ 30.780877] kmem_cache_free+0x10d/0x4d0 [ 30.781397] rcu_core+0x8c8/0x2860 [ 30.781853] __do_softirq+0x1b7/0x7d4 [ 30.782346] [ 30.782567] Last potentially related work creation: [ 30.783172] kasan_save_stack+0x22/0x50 [ 30.783686] __kasan_record_aux_stack+0x8e/0xa0 [ 30.784278] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.784956] remove_vma+0x139/0x170 [ 30.785495] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.786070] do_vmi_munmap+0x1f1/0x2b0 [ 30.786567] __vm_munmap+0x138/0x3a0 [ 30.787047] __x64_sys_munmap+0x59/0x80 [ 30.787557] do_syscall_64+0x3f/0x90 [ 30.788048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.788721] [ 30.788944] Second to last potentially related work creation: [ 30.789650] kasan_save_stack+0x22/0x50 [ 30.790162] __kasan_record_aux_stack+0x8e/0xa0 [ 30.790755] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.791422] remove_vma+0x139/0x170 [ 30.791887] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.792484] do_vmi_munmap+0x1f1/0x2b0 [ 30.792985] mmap_region+0x1f9/0x2660 [ 30.793470] do_mmap+0x854/0xf00 [ 30.793917] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.794423] ksys_mmap_pgoff+0x7d/0x500 [ 30.794953] do_syscall_64+0x3f/0x90 [ 30.795441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.796102] [ 30.796321] The buggy address belongs to the object at ffff888018ddc3a0 [ 30.796321] which belongs to the cache vm_area_struct of size 168 [ 30.797859] The buggy address is located 88 bytes inside of [ 30.797859] freed 168-byte region [ffff888018ddc3a0, ffff888018ddc448) [ 30.799315] [ 30.799542] The buggy address belongs to the physical page: [ 30.800220] page:000000008dd52b78 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ddc [ 30.801375] memcg:ffff888018dd3201 [ 30.801817] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.802495] page_type: 0xffffffff() [ 30.802960] raw: 0100000000000200 ffff8880087a0c80 ffffea0000637480 000000000000000a [ 30.803923] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018dd3201 [ 30.804875] page dumped because: kasan: bad access detected [ 30.805565] [ 30.805788] Memory state around the buggy address: [ 30.806384] ffff888018ddc280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.807267] ffff888018ddc300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.808158] >ffff888018ddc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.809049] ^ [ 30.809927] ffff888018ddc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.810822] ffff888018ddc480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.811711] ================================================================== [ 30.812671] Disabling lock debugging due to kernel taint [ 32.731642] BUG: Bad rss-counter state mm:00000000f8c9694c type:MM_FILEPAGES val:33 [ 32.732859] BUG: Bad rss-counter state mm:00000000f8c9694c type:MM_ANONPAGES val:22 [ 33.288819] BUG: Bad rss-counter state mm:00000000fc806986 type:MM_FILEPAGES val:33 [ 33.290166] BUG: Bad rss-counter state mm:00000000fc806986 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6520' (ECDSA) to the list of known hosts. 2023/06/21 04:59:43 fuzzer started 2023/06/21 04:59:43 dialing manager at localhost:36067 2023/06/21 04:59:43 checking machine... 2023/06/21 04:59:43 checking revisions... [ 33.943139] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:59:43 testing simple program... [ 33.991527] cgroup: Unknown subsys name 'net' [ 34.050168] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:59:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800dc60000 RSI=ffffffff814c8575 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff8880164cf918 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000000cc0 RIP=ffffffff812d8664 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 00007f644b4b5900 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=00007ffe63fc0000 CR3=000000001ce3a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f64a8209740 CR3=000000000d8f0000 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=7ee0b7f161b8fc8ea94c6d175f216da2 XMM02=0000000000119fd8eff9b2d0a8fce9cb XMM03=000000000011a0a82c67c8bc2e329bc3 XMM04=5f48e61792a58fec00000000000ae988 XMM05=dfcdbad4f1609c370000000000132b60 XMM06=6ebed1a9a65cb98b00000000001319c8 XMM07=e042d86d42eb936e0000000000121c10 XMM08=264694674332d56d000000000011a0a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000