syzkaller login: [ 38.753538] BUG: Bad rss-counter state mm:0000000069dcb93c type:MM_FILEPAGES val:33 [ 38.754557] BUG: Bad rss-counter state mm:0000000069dcb93c type:MM_ANONPAGES val:22 [ 38.929655] ================================================================== [ 38.930660] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.931693] Read of size 8 at addr ffff888019df16b0 by task sshd/226 [ 38.932656] [ 38.932892] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.933836] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.934933] Call Trace: [ 38.935277] <TASK> [ 38.935582] dump_stack_lvl+0x91/0xf0 [ 38.936120] print_report+0xcc/0x620 [ 38.936653] ? __virt_addr_valid+0x102/0x340 [ 38.937253] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.937927] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.938595] kasan_report+0xbe/0xf0 [ 38.939106] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.939806] vma_interval_tree_remove+0xc75/0xec0 [ 38.940459] vma_prepare+0xc54/0x11a0 [ 38.941022] __split_vma+0x5af/0x950 [ 38.941538] ? __pfx___split_vma+0x10/0x10 [ 38.942127] ? find_held_lock+0x2c/0x110 [ 38.942727] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.943343] ? lock_is_held_type+0x9f/0x120 [ 38.943938] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.944624] ? mtree_range_walk+0x632/0x900 [ 38.945228] ? mas_walk+0x5c7/0x7c0 [ 38.945748] do_vmi_munmap+0x1f1/0x2b0 [ 38.946302] mmap_region+0x1f9/0x2660 [ 38.946821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.947368] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.948131] ? __pfx_lock_acquire+0x10/0x10 [ 38.948700] ? __pfx_mmap_region+0x10/0x10 [ 38.949255] ? security_mmap_addr+0x7d/0xa0 [ 38.949823] ? get_unmapped_area+0x1f5/0x3f0 [ 38.950408] do_mmap+0x854/0xf00 [ 38.950879] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.951407] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.952002] ksys_mmap_pgoff+0x3af/0x500 [ 38.952565] do_syscall_64+0x3f/0x90 [ 38.953087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953773] RIP: 0033:0x7f1af4678d82 [ 38.954260] 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 [ 38.956550] RSP: 002b:00007ffcca2cfcc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.957516] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1af4678d82 [ 38.958423] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1af3ab2000 [ 38.959316] RBP: 00007f1af3ab2000 R08: 0000000000000009 R09: 0000000000001000 [ 38.960216] R10: 0000000000000812 R11: 0000000000000206 R12: 000056326fa76ec0 [ 38.961126] R13: 00007ffcca2cfce0 R14: 00007ffcca2cfd10 R15: 00007ffcca2d0070 [ 38.962030] </TASK> [ 38.962340] [ 38.962569] Allocated by task 219: [ 38.963018] kasan_save_stack+0x22/0x50 [ 38.963564] kasan_set_track+0x25/0x30 [ 38.964067] __kasan_slab_alloc+0x59/0x70 [ 38.964626] kmem_cache_alloc+0x16b/0x370 [ 38.965163] vm_area_dup+0x20/0x160 [ 38.965635] __split_vma+0x170/0x950 [ 38.966124] split_vma+0xc6/0x110 [ 38.966572] mprotect_fixup+0x8d2/0xb30 [ 38.967095] do_mprotect_pkey+0x87e/0xd40 [ 38.967619] __x64_sys_mprotect+0x78/0xc0 [ 38.968162] do_syscall_64+0x3f/0x90 [ 38.968647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.969293] [ 38.969506] Freed by task 204: [ 38.969900] kasan_save_stack+0x22/0x50 [ 38.970406] kasan_set_track+0x25/0x30 [ 38.970904] kasan_save_free_info+0x2b/0x50 [ 38.971443] __kasan_slab_free+0x10a/0x190 [ 38.971978] kmem_cache_free+0x10d/0x4d0 [ 38.972496] rcu_core+0x8c8/0x2860 [ 38.972953] __do_softirq+0x1b7/0x7d4 [ 38.973438] [ 38.973653] Last potentially related work creation: [ 38.974243] kasan_save_stack+0x22/0x50 [ 38.974752] __kasan_record_aux_stack+0x8e/0xa0 [ 38.975343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.975997] remove_vma+0x139/0x170 [ 38.976455] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.977046] do_vmi_munmap+0x1f1/0x2b0 [ 38.977553] __vm_munmap+0x138/0x3a0 [ 38.978027] __x64_sys_munmap+0x59/0x80 [ 38.978533] do_syscall_64+0x3f/0x90 [ 38.979021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.979684] [ 38.979908] The buggy address belongs to the object at ffff888019df1658 [ 38.979908] which belongs to the cache vm_area_struct of size 168 [ 38.981404] The buggy address is located 88 bytes inside of [ 38.981404] freed 168-byte region [ffff888019df1658, ffff888019df1700) [ 38.982852] [ 38.983073] The buggy address belongs to the physical page: [ 38.983752] page:00000000d5d0405c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19df1 [ 38.984895] memcg:ffff88800e8fae01 [ 38.985333] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.985992] page_type: 0xffffffff() [ 38.986455] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.987398] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8fae01 [ 38.988329] page dumped because: kasan: bad access detected [ 38.989011] [ 38.989230] Memory state around the buggy address: [ 38.989823] ffff888019df1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.990711] ffff888019df1600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.991609] >ffff888019df1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.992492] ^ [ 38.993096] ffff888019df1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.993979] ffff888019df1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.994860] ================================================================== [ 38.995844] Disabling lock debugging due to kernel taint [ 40.879730] BUG: Bad rss-counter state mm:000000006b757931 type:MM_FILEPAGES val:33 [ 40.880957] BUG: Bad rss-counter state mm:000000006b757931 type:MM_ANONPAGES val:22 [ 41.536732] BUG: Bad rss-counter state mm:00000000e24f18c7 type:MM_FILEPAGES val:33 [ 41.538018] BUG: Bad rss-counter state mm:00000000e24f18c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2257' (ECDSA) to the list of known hosts. 2023/06/20 19:41:50 fuzzer started 2023/06/20 19:41:50 dialing manager at localhost:36067 2023/06/20 19:41:50 checking machine... 2023/06/20 19:41:50 checking revisions... [ 42.214536] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:41:51 testing simple program... [ 42.255037] cgroup: Unknown subsys name 'net' [ 42.292053] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:41:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000005a RCX=ffffffff83723c94 RDX=ffff888015c88000 RSI=0000000000000000 RDI=0000000000000000 RBP=000000000000005b RSP=ffff88801021f7b8 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99db0 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0408 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 00007f70ab6ca900 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=00007ffc8d29c000 CR3=000000000eebe000 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=00007f328c1b5000 CR3=0000000009a44000 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=aef2977a712afcbb604dab62fdf233c0 XMM02=2c67c8bc2e329bc3000000000011c288 XMM03=fb795ef6d65770560000000000122490 XMM04=aadb54008bc8dcfc00000000000ae988 XMM05=6860aeb314f8829d0000000000132ab0 XMM06=13e856d8d71426c80000000000132938 XMM07=e042d86d42eb936e0000000000122768 XMM08=c4a3d9ff6040694d000000000011c2e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000