syzkaller login: [ 79.029019] BUG: Bad rss-counter state mm:000000005f28ec00 type:MM_FILEPAGES val:33 [ 79.030348] BUG: Bad rss-counter state mm:000000005f28ec00 type:MM_ANONPAGES val:22 [ 79.180191] ================================================================== [ 79.181354] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 79.182531] Read of size 8 at addr ffff888009807a50 by task sshd/220 [ 79.183633] [ 79.183880] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 79.184963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 79.186015] Call Trace: [ 79.186349] [ 79.186649] dump_stack_lvl+0x91/0xf0 [ 79.187159] print_report+0xcc/0x620 [ 79.187668] ? __virt_addr_valid+0x102/0x340 [ 79.188265] ? vma_interval_tree_remove+0xc75/0xec0 [ 79.188914] ? vma_interval_tree_remove+0xc75/0xec0 [ 79.189556] kasan_report+0xbe/0xf0 [ 79.190052] ? vma_interval_tree_remove+0xc75/0xec0 [ 79.190698] vma_interval_tree_remove+0xc75/0xec0 [ 79.191316] vma_prepare+0xc54/0x11a0 [ 79.191841] __split_vma+0x5af/0x950 [ 79.192337] ? __pfx___split_vma+0x10/0x10 [ 79.192888] ? find_held_lock+0x2c/0x110 [ 79.193426] do_vmi_align_munmap+0x2ba/0x11f0 [ 79.194014] ? lock_is_held_type+0x9f/0x120 [ 79.194574] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 79.195197] ? mtree_range_walk+0x632/0x900 [ 79.195789] ? mas_walk+0x5c7/0x7c0 [ 79.196291] do_vmi_munmap+0x1f1/0x2b0 [ 79.196807] mmap_region+0x1f9/0x2660 [ 79.197311] ? vm_mmap_pgoff+0x15c/0x3a0 [ 79.197838] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 79.198578] ? __pfx_lock_acquire+0x10/0x10 [ 79.199135] ? __pfx_mmap_region+0x10/0x10 [ 79.199688] ? security_mmap_addr+0x7d/0xa0 [ 79.200274] ? get_unmapped_area+0x1f5/0x3f0 [ 79.200844] do_mmap+0x854/0xf00 [ 79.201306] vm_mmap_pgoff+0x1a6/0x3a0 [ 79.201823] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 79.202407] ksys_mmap_pgoff+0x3af/0x500 [ 79.202934] do_syscall_64+0x3f/0x90 [ 79.203428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 79.204112] RIP: 0033:0x7f4980a4ed82 [ 79.204586] 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 [ 79.206772] RSP: 002b:00007ffcb4e19388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 79.207707] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4980a4ed82 [ 79.208590] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f497fe88000 [ 79.209464] RBP: 00007f497fe88000 R08: 0000000000000009 R09: 0000000000001000 [ 79.210335] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623cda74f70 [ 79.211215] R13: 00007ffcb4e193a0 R14: 00007ffcb4e193d0 R15: 00007ffcb4e19730 [ 79.212125] [ 79.212432] [ 79.212661] Allocated by task 213: [ 79.213106] kasan_save_stack+0x22/0x50 [ 79.213633] kasan_set_track+0x25/0x30 [ 79.214145] __kasan_slab_alloc+0x59/0x70 [ 79.214698] kmem_cache_alloc+0x16b/0x370 [ 79.215231] vm_area_dup+0x20/0x160 [ 79.215703] __split_vma+0x170/0x950 [ 79.216202] split_vma+0xc6/0x110 [ 79.216656] mprotect_fixup+0x8d2/0xb30 [ 79.217176] do_mprotect_pkey+0x87e/0xd40 [ 79.217722] __x64_sys_mprotect+0x78/0xc0 [ 79.218263] do_syscall_64+0x3f/0x90 [ 79.218752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 79.219413] [ 79.219644] Freed by task 213: [ 79.220070] kasan_save_stack+0x22/0x50 [ 79.220592] kasan_set_track+0x25/0x30 [ 79.221106] kasan_save_free_info+0x2b/0x50 [ 79.221656] __kasan_slab_free+0x10a/0x190 [ 79.222208] kmem_cache_free+0x10d/0x4d0 [ 79.222793] rcu_core+0x8c8/0x2860 [ 79.223344] __do_softirq+0x1b7/0x7d4 [ 79.223957] [ 79.224222] Last potentially related work creation: [ 79.224958] kasan_save_stack+0x22/0x50 [ 79.225566] __kasan_record_aux_stack+0x8e/0xa0 [ 79.226249] __call_rcu_common.constprop.0+0x6a/0xb90 [ 79.227013] remove_vma+0x139/0x170 [ 79.227549] do_vmi_align_munmap+0xd4a/0x11f0 [ 79.228242] do_vmi_munmap+0x1f1/0x2b0 [ 79.228784] __vm_munmap+0x138/0x3a0 [ 79.229250] __x64_sys_munmap+0x59/0x80 [ 79.229743] do_syscall_64+0x3f/0x90 [ 79.230212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 79.230852] [ 79.231067] The buggy address belongs to the object at ffff8880098079f8 [ 79.231067] which belongs to the cache vm_area_struct of size 168 [ 79.232536] The buggy address is located 88 bytes inside of [ 79.232536] freed 168-byte region [ffff8880098079f8, ffff888009807aa0) [ 79.233950] [ 79.234161] The buggy address belongs to the physical page: [ 79.234823] page:00000000a903e904 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9807 [ 79.235920] memcg:ffff888008f86601 [ 79.236342] flags: 0x100000000000200(slab|node=0|zone=1) [ 79.236997] page_type: 0xffffffff() [ 79.237443] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 79.238357] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008f86601 [ 79.239256] page dumped because: kasan: bad access detected [ 79.239948] [ 79.240166] Memory state around the buggy address: [ 79.240750] ffff888009807900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 79.241615] ffff888009807980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 79.242470] >ffff888009807a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 79.243395] ^ [ 79.244209] ffff888009807a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 79.245143] ffff888009807b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 79.246002] ================================================================== [ 79.247113] Disabling lock debugging due to kernel taint [ 81.108630] BUG: Bad rss-counter state mm:000000005809e4e2 type:MM_FILEPAGES val:33 [ 81.109611] BUG: Bad rss-counter state mm:000000005809e4e2 type:MM_ANONPAGES val:22 [ 81.585728] BUG: Bad rss-counter state mm:00000000548e2643 type:MM_FILEPAGES val:33 [ 81.586896] BUG: Bad rss-counter state mm:00000000548e2643 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18790' (ECDSA) to the list of known hosts. 2023/06/19 11:36:52 fuzzer started 2023/06/19 11:36:53 dialing manager at localhost:44161 2023/06/19 11:36:53 checking machine... 2023/06/19 11:36:53 checking revisions... [ 82.302094] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:36:53 testing simple program... [ 82.351068] cgroup: Unknown subsys name 'net' [ 82.413652] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:36:04 Registers: info registers vcpu 0 RAX=0000000000001000 RBX=0000558d06353ed0 RCX=00007f708e320e8e RDX=0000000000001000 RSI=0000558d063624b0 RDI=0000000000000008 RBP=00007f708e3f24a0 RSP=00007ffd2d1408d8 R8 =0000000000000008 R9 =00007f708e3f0be0 R10=0000000000000100 R11=0000000000000246 R12=0000000000000035 R13=00007f708e3f18a0 R14=0000000000000d68 R15=0000000000000d68 RIP=00007f708e320e8e RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f708de3e900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd2d13b000 CR3=000000000d634000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=0000000000000001 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=00007fa8894c1000 CR3=0000000018248000 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=2032353a36333a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a36333a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000