syzkaller login: [ 23.900005] BUG: Bad rss-counter state mm:00000000c4468ac0 type:MM_FILEPAGES val:33 [ 23.901212] BUG: Bad rss-counter state mm:00000000c4468ac0 type:MM_ANONPAGES val:22 [ 23.934863] ================================================================== [ 23.935755] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.936692] Read of size 8 at addr ffff88800c65c3f8 by task sshd/220 [ 23.937473] [ 23.937692] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.938701] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.939696] Call Trace: [ 23.940020] [ 23.940309] dump_stack_lvl+0x91/0xf0 [ 23.940816] print_report+0xcc/0x620 [ 23.941307] ? __virt_addr_valid+0x102/0x340 [ 23.941865] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.942515] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.943144] kasan_report+0xbe/0xf0 [ 23.943630] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.944278] vma_interval_tree_remove+0xc75/0xec0 [ 23.944888] vma_prepare+0xc54/0x11a0 [ 23.945366] __split_vma+0x5af/0x950 [ 23.945841] ? __pfx___split_vma+0x10/0x10 [ 23.946384] ? find_held_lock+0x2c/0x110 [ 23.946915] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.947483] ? lock_is_held_type+0x9f/0x120 [ 23.948020] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.948627] ? mtree_range_walk+0x632/0x900 [ 23.949181] ? mas_walk+0x5c7/0x7c0 [ 23.949657] do_vmi_munmap+0x1f1/0x2b0 [ 23.950148] mmap_region+0x1f9/0x2660 [ 23.950642] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.951162] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.951874] ? __pfx_lock_acquire+0x10/0x10 [ 23.952415] ? __pfx_mmap_region+0x10/0x10 [ 23.952953] ? security_mmap_addr+0x7d/0xa0 [ 23.953486] ? get_unmapped_area+0x1f5/0x3f0 [ 23.954037] do_mmap+0x854/0xf00 [ 23.954496] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.954988] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.955552] ksys_mmap_pgoff+0x3af/0x500 [ 23.956064] do_syscall_64+0x3f/0x90 [ 23.956547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.957192] RIP: 0033:0x7f18f2d81d82 [ 23.957647] 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 [ 23.959769] RSP: 002b:00007ffe8bdc9688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.960682] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18f2d81d82 [ 23.961521] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18f21bb000 [ 23.962363] RBP: 00007f18f21bb000 R08: 0000000000000009 R09: 0000000000001000 [ 23.963220] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620d69eaec0 [ 23.964063] R13: 00007ffe8bdc96a0 R14: 00007ffe8bdc96d0 R15: 00007ffe8bdc9a30 [ 23.964920] [ 23.965209] [ 23.965427] Allocated by task 213: [ 23.965860] kasan_save_stack+0x22/0x50 [ 23.966366] kasan_set_track+0x25/0x30 [ 23.966889] __kasan_slab_alloc+0x59/0x70 [ 23.967410] kmem_cache_alloc+0x16b/0x370 [ 23.967924] vm_area_dup+0x20/0x160 [ 23.968389] __split_vma+0x170/0x950 [ 23.968853] split_vma+0xc6/0x110 [ 23.969290] mprotect_fixup+0x8d2/0xb30 [ 23.969789] do_mprotect_pkey+0x87e/0xd40 [ 23.970311] __x64_sys_mprotect+0x78/0xc0 [ 23.970845] do_syscall_64+0x3f/0x90 [ 23.971324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.971962] [ 23.972179] Freed by task 13: [ 23.972562] kasan_save_stack+0x22/0x50 [ 23.973069] kasan_set_track+0x25/0x30 [ 23.973562] kasan_save_free_info+0x2b/0x50 [ 23.974096] __kasan_slab_free+0x10a/0x190 [ 23.974642] kmem_cache_free+0x10d/0x4d0 [ 23.975156] rcu_core+0x8c8/0x2860 [ 23.975603] __do_softirq+0x1b7/0x7d4 [ 23.976124] [ 23.976338] Last potentially related work creation: [ 23.976924] kasan_save_stack+0x22/0x50 [ 23.977428] __kasan_record_aux_stack+0x8e/0xa0 [ 23.978009] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.978675] remove_vma+0x139/0x170 [ 23.979131] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.979694] do_vmi_munmap+0x1f1/0x2b0 [ 23.980189] __vm_munmap+0x138/0x3a0 [ 23.980669] __x64_sys_munmap+0x59/0x80 [ 23.981168] do_syscall_64+0x3f/0x90 [ 23.981657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.982329] [ 23.982554] Second to last potentially related work creation: [ 23.983244] kasan_save_stack+0x22/0x50 [ 23.983744] __kasan_record_aux_stack+0x8e/0xa0 [ 23.984321] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.984971] remove_vma+0x139/0x170 [ 23.985433] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.986000] do_vmi_munmap+0x1f1/0x2b0 [ 23.986497] mmap_region+0x1f9/0x2660 [ 23.986977] do_mmap+0x854/0xf00 [ 23.987417] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.987915] ksys_mmap_pgoff+0x3af/0x500 [ 23.988423] do_syscall_64+0x3f/0x90 [ 23.988900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.989539] [ 23.989762] The buggy address belongs to the object at ffff88800c65c3a0 [ 23.989762] which belongs to the cache vm_area_struct of size 168 [ 23.991238] The buggy address is located 88 bytes inside of [ 23.991238] freed 168-byte region [ffff88800c65c3a0, ffff88800c65c448) [ 23.992646] [ 23.992864] The buggy address belongs to the physical page: [ 23.993526] page:0000000090bdf453 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc65c [ 23.994621] memcg:ffff8880093d2f01 [ 23.995051] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.995757] page_type: 0xffffffff() [ 23.996221] raw: 0100000000000200 ffff8880087a0c80 ffffea0000355780 dead000000000007 [ 23.997141] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880093d2f01 [ 23.998048] page dumped because: kasan: bad access detected [ 23.998722] [ 23.998940] Memory state around the buggy address: [ 23.999527] ffff88800c65c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.000394] ffff88800c65c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.001254] >ffff88800c65c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.002109] ^ [ 24.002977] ffff88800c65c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.003842] ffff88800c65c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.004704] ================================================================== [ 24.005701] Disabling lock debugging due to kernel taint [ 26.181691] BUG: Bad rss-counter state mm:00000000ca340a19 type:MM_FILEPAGES val:33 [ 26.182971] BUG: Bad rss-counter state mm:00000000ca340a19 type:MM_ANONPAGES val:22 [ 26.645156] BUG: Bad rss-counter state mm:00000000758f73f0 type:MM_FILEPAGES val:33 [ 26.646170] BUG: Bad rss-counter state mm:00000000758f73f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49487' (ECDSA) to the list of known hosts. 2023/06/20 22:51:50 fuzzer started 2023/06/20 22:51:50 dialing manager at localhost:36067 2023/06/20 22:51:50 checking machine... 2023/06/20 22:51:50 checking revisions... [ 27.386439] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:51:50 testing simple program... [ 27.437417] cgroup: Unknown subsys name 'net' [ 27.477048] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:51:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd34dd3b88 CR3=000000000fcea000 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=2039343a31353a3232203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a31353a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801a02ebe0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88801a02ebe4 RBP=1ffff1100d9e13ab RSP=ffff88806cf09d50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000202 R13=ffff88801a02ec20 R14=ffffffff813782f8 R15=ffff88800e362800 RIP=ffffffff812e0072 RFL=00000013 [----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 00007fe62a927900 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=00007ffc7bfd5000 CR3=000000001029c000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=706d6f63206d687469726f676c612023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000