syzkaller login: [ 45.181875] BUG: Bad rss-counter state mm:00000000747380f5 type:MM_FILEPAGES val:33 [ 45.183669] BUG: Bad rss-counter state mm:00000000747380f5 type:MM_ANONPAGES val:22 [ 45.350334] ================================================================== [ 45.351312] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.352316] Read of size 8 at addr ffff88800ef42798 by task sshd/221 [ 45.353241] [ 45.353608] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.354605] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.355751] Call Trace: [ 45.356134] [ 45.356454] dump_stack_lvl+0x91/0xf0 [ 45.357032] print_report+0xcc/0x620 [ 45.357591] ? __virt_addr_valid+0x102/0x340 [ 45.358223] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.358944] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.359672] kasan_report+0xbe/0xf0 [ 45.360219] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.360949] vma_interval_tree_remove+0xc75/0xec0 [ 45.361643] vma_prepare+0xc54/0x11a0 [ 45.362194] __split_vma+0x5af/0x950 [ 45.362728] ? __pfx___split_vma+0x10/0x10 [ 45.363333] ? find_held_lock+0x2c/0x110 [ 45.363936] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.364589] ? lock_is_held_type+0x9f/0x120 [ 45.365233] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.365947] ? mtree_range_walk+0x632/0x900 [ 45.366577] ? mas_walk+0x5c7/0x7c0 [ 45.367119] do_vmi_munmap+0x1f1/0x2b0 [ 45.367701] mmap_region+0x1f9/0x2660 [ 45.368266] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.368872] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.369699] ? __pfx_lock_acquire+0x10/0x10 [ 45.370322] ? __pfx_mmap_region+0x10/0x10 [ 45.370937] ? security_mmap_addr+0x7d/0xa0 [ 45.371553] ? get_unmapped_area+0x1f5/0x3f0 [ 45.372196] do_mmap+0x854/0xf00 [ 45.372707] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.373295] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.373940] ksys_mmap_pgoff+0x3af/0x500 [ 45.374524] do_syscall_64+0x3f/0x90 [ 45.375079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.375831] RIP: 0033:0x7f954a6aed82 [ 45.376364] 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 [ 45.378867] RSP: 002b:00007fff66bb0a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.379926] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f954a6aed82 [ 45.380929] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9549ae8000 [ 45.381930] RBP: 00007f9549ae8000 R08: 0000000000000009 R09: 0000000000001000 [ 45.382922] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560c1b75cec0 [ 45.383941] R13: 00007fff66bb0a80 R14: 00007fff66bb0ab0 R15: 00007fff66bb0e10 [ 45.384969] [ 45.385311] [ 45.385564] Allocated by task 214: [ 45.386060] kasan_save_stack+0x22/0x50 [ 45.386646] kasan_set_track+0x25/0x30 [ 45.387216] __kasan_slab_alloc+0x59/0x70 [ 45.387820] kmem_cache_alloc+0x16b/0x370 [ 45.388417] vm_area_dup+0x20/0x160 [ 45.388957] __split_vma+0x170/0x950 [ 45.389485] split_vma+0xc6/0x110 [ 45.389994] mprotect_fixup+0x8d2/0xb30 [ 45.390572] do_mprotect_pkey+0x87e/0xd40 [ 45.391172] __x64_sys_mprotect+0x78/0xc0 [ 45.391761] do_syscall_64+0x3f/0x90 [ 45.392306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.393057] [ 45.393306] Freed by task 214: [ 45.393734] kasan_save_stack+0x22/0x50 [ 45.394290] kasan_set_track+0x25/0x30 [ 45.394832] kasan_save_free_info+0x2b/0x50 [ 45.395409] __kasan_slab_free+0x10a/0x190 [ 45.396000] kmem_cache_free+0x10d/0x4d0 [ 45.396560] rcu_core+0x8c8/0x2860 [ 45.397064] __do_softirq+0x1b7/0x7d4 [ 45.397591] [ 45.397835] Last potentially related work creation: [ 45.398476] kasan_save_stack+0x22/0x50 [ 45.399026] __kasan_record_aux_stack+0x8e/0xa0 [ 45.399649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.400368] remove_vma+0x139/0x170 [ 45.400885] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.401505] do_vmi_munmap+0x1f1/0x2b0 [ 45.402059] __vm_munmap+0x138/0x3a0 [ 45.402589] __x64_sys_munmap+0x59/0x80 [ 45.403151] do_syscall_64+0x3f/0x90 [ 45.403686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.404412] [ 45.404653] The buggy address belongs to the object at ffff88800ef42740 [ 45.404653] which belongs to the cache vm_area_struct of size 168 [ 45.406339] The buggy address is located 88 bytes inside of [ 45.406339] freed 168-byte region [ffff88800ef42740, ffff88800ef427e8) [ 45.407908] [ 45.408154] The buggy address belongs to the physical page: [ 45.408913] page:000000008c1c29b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef42 [ 45.410128] memcg:ffff88800e668c01 [ 45.410608] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.411342] page_type: 0xffffffff() [ 45.411851] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.412904] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e668c01 [ 45.413957] page dumped because: kasan: bad access detected [ 45.414726] [ 45.414982] Memory state around the buggy address: [ 45.415655] ffff88800ef42680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.416649] ffff88800ef42700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 45.417648] >ffff88800ef42780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 45.418639] ^ [ 45.419206] ffff88800ef42800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 45.420197] ffff88800ef42880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 45.421204] ================================================================== [ 45.422316] Disabling lock debugging due to kernel taint [ 47.410090] BUG: Bad rss-counter state mm:000000006b04ddc4 type:MM_FILEPAGES val:33 [ 47.411557] BUG: Bad rss-counter state mm:000000006b04ddc4 type:MM_ANONPAGES val:22 [ 47.868874] BUG: Bad rss-counter state mm:00000000995d28bf type:MM_FILEPAGES val:33 [ 47.869997] BUG: Bad rss-counter state mm:00000000995d28bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60347' (ECDSA) to the list of known hosts. 2023/06/19 21:57:52 fuzzer started 2023/06/19 21:57:52 dialing manager at localhost:44161 2023/06/19 21:57:53 checking machine... 2023/06/19 21:57:53 checking revisions... [ 48.762974] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:57:53 testing simple program... [ 48.815394] cgroup: Unknown subsys name 'net' [ 48.857352] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:57:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fa56c0f19b0 CR3=0000000016d5e000 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=2032353a37353a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a37353a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8613dd30 RDX=1ffff1100399cdff RSI=1ffff1100399cdfe RDI=1ffff1100399cdfe RBP=ffff88801cce6ff0 RSP=ffff88801cce6f28 R8 =ffffffff8613dd34 R9 =ffff88801cce6fd8 R10=0000000000038001 R11=0000000000021edf R12=ffff88801cce6ff8 R13=ffff88801cce6fe0 R14=ffff88801cce73d8 R15=ffff88801cce6f98 RIP=ffffffff811310ce 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 00007f669ae62900 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=00007f669ae41020 CR3=000000000c8f2000 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=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