syzkaller login: [ 146.801597] BUG: Bad rss-counter state mm:00000000fcad7858 type:MM_FILEPAGES val:33 [ 146.802975] BUG: Bad rss-counter state mm:00000000fcad7858 type:MM_ANONPAGES val:22 [ 146.926788] ================================================================== [ 146.927922] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 146.929108] Read of size 8 at addr ffff888016883968 by task sshd/220 [ 146.930188] [ 146.930457] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 146.931745] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 146.932855] Call Trace: [ 146.933177] [ 146.933466] dump_stack_lvl+0x91/0xf0 [ 146.933968] print_report+0xcc/0x620 [ 146.934459] ? __virt_addr_valid+0x102/0x340 [ 146.935021] ? vma_interval_tree_remove+0xc75/0xec0 [ 146.935651] ? vma_interval_tree_remove+0xc75/0xec0 [ 146.936268] kasan_report+0xbe/0xf0 [ 146.936753] ? vma_interval_tree_remove+0xc75/0xec0 [ 146.937384] vma_interval_tree_remove+0xc75/0xec0 [ 146.937992] vma_prepare+0xc54/0x11a0 [ 146.938472] __split_vma+0x5af/0x950 [ 146.938947] ? __pfx___split_vma+0x10/0x10 [ 146.939476] ? find_held_lock+0x2c/0x110 [ 146.939997] do_vmi_align_munmap+0x2ba/0x11f0 [ 146.940564] ? lock_is_held_type+0x9f/0x120 [ 146.941119] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 146.941731] ? mtree_range_walk+0x632/0x900 [ 146.942282] ? mas_walk+0x5c7/0x7c0 [ 146.942759] do_vmi_munmap+0x1f1/0x2b0 [ 146.943252] mmap_region+0x1f9/0x2660 [ 146.943739] ? vm_mmap_pgoff+0x15c/0x3a0 [ 146.944269] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 146.945005] ? __pfx_lock_acquire+0x10/0x10 [ 146.945542] ? __pfx_mmap_region+0x10/0x10 [ 146.946082] ? security_mmap_addr+0x7d/0xa0 [ 146.946627] ? get_unmapped_area+0x1f5/0x3f0 [ 146.947197] do_mmap+0x854/0xf00 [ 146.947651] vm_mmap_pgoff+0x1a6/0x3a0 [ 146.948168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 146.948760] ksys_mmap_pgoff+0x3af/0x500 [ 146.949277] do_syscall_64+0x3f/0x90 [ 146.949764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 146.950433] RIP: 0033:0x7fed7d237d82 [ 146.950902] 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 [ 146.953084] RSP: 002b:00007ffc3d178928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 146.953992] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed7d237d82 [ 146.954850] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed7c671000 [ 146.955699] RBP: 00007fed7c671000 R08: 0000000000000009 R09: 0000000000001000 [ 146.956553] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c187583f60 [ 146.957421] R13: 00007ffc3d178940 R14: 00007ffc3d178970 R15: 00007ffc3d178cd0 [ 146.958281] [ 146.958581] [ 146.958805] Allocated by task 213: [ 146.959231] kasan_save_stack+0x22/0x50 [ 146.959742] kasan_set_track+0x25/0x30 [ 146.960238] __kasan_slab_alloc+0x59/0x70 [ 146.960774] kmem_cache_alloc+0x16b/0x370 [ 146.961305] vm_area_dup+0x20/0x160 [ 146.961766] __split_vma+0x170/0x950 [ 146.962238] split_vma+0xc6/0x110 [ 146.962681] mprotect_fixup+0x8d2/0xb30 [ 146.963185] do_mprotect_pkey+0x87e/0xd40 [ 146.963707] __x64_sys_mprotect+0x78/0xc0 [ 146.964229] do_syscall_64+0x3f/0x90 [ 146.964711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 146.965357] [ 146.965580] Freed by task 213: [ 146.965974] kasan_save_stack+0x22/0x50 [ 146.966477] kasan_set_track+0x25/0x30 [ 146.966973] kasan_save_free_info+0x2b/0x50 [ 146.967506] __kasan_slab_free+0x10a/0x190 [ 146.968040] kmem_cache_free+0x10d/0x4d0 [ 146.968549] rcu_core+0x8c8/0x2860 [ 146.969012] __do_softirq+0x1b7/0x7d4 [ 146.969495] [ 146.969710] Last potentially related work creation: [ 146.970296] kasan_save_stack+0x22/0x50 [ 146.970801] __kasan_record_aux_stack+0x8e/0xa0 [ 146.971401] __call_rcu_common.constprop.0+0x6a/0xb90 [ 146.972046] remove_vma+0x139/0x170 [ 146.972501] do_vmi_align_munmap+0xd4a/0x11f0 [ 146.973079] do_vmi_munmap+0x1f1/0x2b0 [ 146.973567] __vm_munmap+0x138/0x3a0 [ 146.974036] __x64_sys_munmap+0x59/0x80 [ 146.974534] do_syscall_64+0x3f/0x90 [ 146.975009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 146.975653] [ 146.975872] The buggy address belongs to the object at ffff888016883910 [ 146.975872] which belongs to the cache vm_area_struct of size 168 [ 146.977352] The buggy address is located 88 bytes inside of [ 146.977352] freed 168-byte region [ffff888016883910, ffff8880168839b8) [ 146.978753] [ 146.978974] The buggy address belongs to the physical page: [ 146.979629] page:00000000e9a09da1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16883 [ 146.980739] memcg:ffff88800dcd7f01 [ 146.981168] flags: 0x100000000000200(slab|node=0|zone=1) [ 146.981817] page_type: 0xffffffff() [ 146.982271] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 146.983187] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcd7f01 [ 146.984092] page dumped because: kasan: bad access detected [ 146.984760] [ 146.984983] Memory state around the buggy address: [ 146.985565] ffff888016883800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 146.986424] ffff888016883880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 146.987285] >ffff888016883900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 146.988135] ^ [ 146.988940] ffff888016883980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 146.989799] ffff888016883a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 146.990648] ================================================================== [ 146.991564] Disabling lock debugging due to kernel taint [ 148.760880] BUG: Bad rss-counter state mm:00000000fcc8187a type:MM_FILEPAGES val:33 [ 148.762144] BUG: Bad rss-counter state mm:00000000fcc8187a type:MM_ANONPAGES val:22 [ 149.318361] BUG: Bad rss-counter state mm:0000000069538005 type:MM_FILEPAGES val:33 [ 149.319517] BUG: Bad rss-counter state mm:0000000069538005 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47072' (ECDSA) to the list of known hosts. 2023/06/20 03:01:47 fuzzer started 2023/06/20 03:01:48 dialing manager at localhost:44161 2023/06/20 03:01:48 checking machine... 2023/06/20 03:01:48 checking revisions... [ 149.967221] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:01:48 testing simple program... [ 150.020077] cgroup: Unknown subsys name 'net' [ 150.070221] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:00:21 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=0000000000000001 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=00007ffd5a50dac8 CR3=0000000005482000 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=00007ffad45f9510000055accfb1b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 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=00007f885f8e6b40 CR3=0000000015a44000 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=2037343a31303a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a31303a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000