syzkaller login: [ 31.365075] BUG: Bad rss-counter state mm:0000000028bdfc2c type:MM_FILEPAGES val:33 [ 31.366376] BUG: Bad rss-counter state mm:0000000028bdfc2c type:MM_ANONPAGES val:22 [ 31.512192] ================================================================== [ 31.513282] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.514399] Read of size 8 at addr ffff88800d653880 by task sshd/220 [ 31.515324] [ 31.515589] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.516738] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.517928] Call Trace: [ 31.518322] <TASK> [ 31.518660] dump_stack_lvl+0x91/0xf0 [ 31.519249] print_report+0xcc/0x620 [ 31.519838] ? __virt_addr_valid+0x102/0x340 [ 31.520537] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.521265] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.521851] kasan_report+0xbe/0xf0 [ 31.522303] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.522887] vma_interval_tree_remove+0xc75/0xec0 [ 31.523453] vma_prepare+0xc54/0x11a0 [ 31.523915] __split_vma+0x5af/0x950 [ 31.524362] ? __pfx___split_vma+0x10/0x10 [ 31.524865] ? find_held_lock+0x2c/0x110 [ 31.525358] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.525888] ? lock_is_held_type+0x9f/0x120 [ 31.526400] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.526970] ? mtree_range_walk+0x632/0x900 [ 31.527488] ? mas_walk+0x5c7/0x7c0 [ 31.527949] do_vmi_munmap+0x1f1/0x2b0 [ 31.528411] mmap_region+0x1f9/0x2660 [ 31.528869] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.529350] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.530019] ? __pfx_lock_acquire+0x10/0x10 [ 31.530521] ? __pfx_mmap_region+0x10/0x10 [ 31.531021] ? security_mmap_addr+0x7d/0xa0 [ 31.531520] ? get_unmapped_area+0x1f5/0x3f0 [ 31.532065] do_mmap+0x854/0xf00 [ 31.532478] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.532945] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.533480] ksys_mmap_pgoff+0x3af/0x500 [ 31.533976] do_syscall_64+0x3f/0x90 [ 31.534435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.535061] RIP: 0033:0x7f8e60446d82 [ 31.535499] 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 [ 31.537538] RSP: 002b:00007ffd09ccfec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.538417] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e60446d82 [ 31.539240] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e5f880000 [ 31.540070] RBP: 00007f8e5f880000 R08: 0000000000000009 R09: 0000000000001000 [ 31.540888] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f3efc0ec0 [ 31.541705] R13: 00007ffd09ccfee0 R14: 00007ffd09ccff10 R15: 00007ffd09cd0270 [ 31.542546] </TASK> [ 31.542836] [ 31.543045] Allocated by task 213: [ 31.543458] kasan_save_stack+0x22/0x50 [ 31.543962] kasan_set_track+0x25/0x30 [ 31.544448] __kasan_slab_alloc+0x59/0x70 [ 31.544959] kmem_cache_alloc+0x16b/0x370 [ 31.545458] vm_area_dup+0x20/0x160 [ 31.545899] __split_vma+0x170/0x950 [ 31.546347] split_vma+0xc6/0x110 [ 31.546787] mprotect_fixup+0x8d2/0xb30 [ 31.547282] do_mprotect_pkey+0x87e/0xd40 [ 31.547793] __x64_sys_mprotect+0x78/0xc0 [ 31.548305] do_syscall_64+0x3f/0x90 [ 31.548773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.549387] [ 31.549602] Freed by task 213: [ 31.549981] kasan_save_stack+0x22/0x50 [ 31.550460] kasan_set_track+0x25/0x30 [ 31.550941] kasan_save_free_info+0x2b/0x50 [ 31.551450] __kasan_slab_free+0x10a/0x190 [ 31.551978] kmem_cache_free+0x10d/0x4d0 [ 31.552471] rcu_core+0x8c8/0x2860 [ 31.552903] __do_softirq+0x1b7/0x7d4 [ 31.553364] [ 31.553578] Last potentially related work creation: [ 31.554138] kasan_save_stack+0x22/0x50 [ 31.554622] __kasan_record_aux_stack+0x8e/0xa0 [ 31.555184] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.555801] remove_vma+0x139/0x170 [ 31.556265] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.556811] do_vmi_munmap+0x1f1/0x2b0 [ 31.557293] __vm_munmap+0x138/0x3a0 [ 31.557744] __x64_sys_munmap+0x59/0x80 [ 31.558216] do_syscall_64+0x3f/0x90 [ 31.558681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.559311] [ 31.559525] The buggy address belongs to the object at ffff88800d653828 [ 31.559525] which belongs to the cache vm_area_struct of size 168 [ 31.560943] The buggy address is located 88 bytes inside of [ 31.560943] freed 168-byte region [ffff88800d653828, ffff88800d6538d0) [ 31.562288] [ 31.562499] The buggy address belongs to the physical page: [ 31.563146] page:000000000a8bd627 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd653 [ 31.564195] memcg:ffff888014575901 [ 31.564609] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.565228] page_type: 0xffffffff() [ 31.565662] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.566548] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014575901 [ 31.567415] page dumped because: kasan: bad access detected [ 31.568076] [ 31.568282] Memory state around the buggy address: [ 31.568845] ffff88800d653780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.569668] ffff88800d653800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.570486] >ffff88800d653880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.571334] ^ [ 31.571778] ffff88800d653900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.572651] ffff88800d653980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.573494] ================================================================== [ 31.574498] Disabling lock debugging due to kernel taint [ 33.182752] BUG: Bad rss-counter state mm:000000002cdd64a6 type:MM_FILEPAGES val:33 [ 33.183527] BUG: Bad rss-counter state mm:000000002cdd64a6 type:MM_ANONPAGES val:22 [ 33.552108] BUG: Bad rss-counter state mm:0000000008efb058 type:MM_FILEPAGES val:33 [ 33.552623] BUG: Bad rss-counter state mm:0000000008efb058 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48773' (ECDSA) to the list of known hosts. 2023/06/21 08:12:46 fuzzer started 2023/06/21 08:12:46 dialing manager at localhost:36067 2023/06/21 08:12:46 checking machine... 2023/06/21 08:12:46 checking revisions... [ 34.282984] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:12:46 testing simple program... [ 34.335616] cgroup: Unknown subsys name 'net' [ 34.399130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:12:45 Registers: info registers vcpu 0 RAX=ffff888016d3b680 RBX=ffff888016497370 RCX=ffffffff81132ffe RDX=ffff888016497288 RSI=0000000000000000 RDI=ffff888016497348 RBP=ffff888016d3b680 RSP=ffff888016497288 R8 =0000000000000002 R9 =0000000000000000 R10=ffff8880164972d8 R11=00000000000b6a61 R12=0000000000000000 R13=ffff888016497300 R14=ffff888016497320 R15=ffff8880164972d8 RIP=ffffffff81133010 RFL=00000246 [---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 00007f9f117f0900 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=00007ffeeb9ae000 CR3=000000000c5e4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=ffff888008c04400 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=00007f2565fa95f0 CR3=000000000c56e000 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=2035343a32313a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a32313a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000