syzkaller login: [ 35.421745] BUG: Bad rss-counter state mm:00000000b834bad9 type:MM_FILEPAGES val:33 [ 35.422902] BUG: Bad rss-counter state mm:00000000b834bad9 type:MM_ANONPAGES val:22 [ 35.575391] ================================================================== [ 35.576250] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.577133] Read of size 8 at addr ffff88800e1fb798 by task sshd/219 [ 35.577870] [ 35.578080] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.579045] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.579973] Call Trace: [ 35.580275] [ 35.580546] dump_stack_lvl+0x91/0xf0 [ 35.581013] print_report+0xcc/0x620 [ 35.581481] ? __virt_addr_valid+0x102/0x340 [ 35.582002] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.582591] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.583171] kasan_report+0xbe/0xf0 [ 35.583625] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.584215] vma_interval_tree_remove+0xc75/0xec0 [ 35.584787] vma_prepare+0xc54/0x11a0 [ 35.585242] __split_vma+0x5af/0x950 [ 35.585714] ? __pfx___split_vma+0x10/0x10 [ 35.586217] ? find_held_lock+0x2c/0x110 [ 35.586711] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.587274] ? lock_is_held_type+0x9f/0x120 [ 35.587910] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.588624] ? mtree_range_walk+0x632/0x900 [ 35.589274] ? mas_walk+0x5c7/0x7c0 [ 35.589840] do_vmi_munmap+0x1f1/0x2b0 [ 35.590422] mmap_region+0x1f9/0x2660 [ 35.590994] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.591602] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.592445] ? __pfx_lock_acquire+0x10/0x10 [ 35.593076] ? __pfx_mmap_region+0x10/0x10 [ 35.593715] ? security_mmap_addr+0x7d/0xa0 [ 35.594340] ? get_unmapped_area+0x1f5/0x3f0 [ 35.594991] do_mmap+0x854/0xf00 [ 35.595507] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.596092] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.596757] ksys_mmap_pgoff+0x3af/0x500 [ 35.597376] do_syscall_64+0x3f/0x90 [ 35.597935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.598712] RIP: 0033:0x7f21613ead82 [ 35.599256] 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 [ 35.601798] RSP: 002b:00007ffd92138798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.602873] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f21613ead82 [ 35.603879] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2160824000 [ 35.604883] RBP: 00007f2160824000 R08: 0000000000000009 R09: 0000000000001000 [ 35.605891] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d2cbc7ec0 [ 35.606897] R13: 00007ffd921387b0 R14: 00007ffd921387e0 R15: 00007ffd92138b40 [ 35.607906] [ 35.608252] [ 35.608503] Allocated by task 212: [ 35.609011] kasan_save_stack+0x22/0x50 [ 35.609630] kasan_set_track+0x25/0x30 [ 35.610214] __kasan_slab_alloc+0x59/0x70 [ 35.610835] kmem_cache_alloc+0x16b/0x370 [ 35.611444] vm_area_dup+0x20/0x160 [ 35.611979] __split_vma+0x170/0x950 [ 35.612526] split_vma+0xc6/0x110 [ 35.613044] mprotect_fixup+0x8d2/0xb30 [ 35.613646] do_mprotect_pkey+0x87e/0xd40 [ 35.614260] __x64_sys_mprotect+0x78/0xc0 [ 35.614874] do_syscall_64+0x3f/0x90 [ 35.615432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.616189] [ 35.616440] Freed by task 102: [ 35.616901] kasan_save_stack+0x22/0x50 [ 35.617498] kasan_set_track+0x25/0x30 [ 35.618083] kasan_save_free_info+0x2b/0x50 [ 35.618714] __kasan_slab_free+0x10a/0x190 [ 35.619422] kmem_cache_free+0x10d/0x4d0 [ 35.620023] rcu_core+0x8c8/0x2860 [ 35.620546] __do_softirq+0x1b7/0x7d4 [ 35.621110] [ 35.621374] Last potentially related work creation: [ 35.622067] kasan_save_stack+0x22/0x50 [ 35.622665] __kasan_record_aux_stack+0x8e/0xa0 [ 35.623340] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.624099] remove_vma+0x139/0x170 [ 35.624635] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.625290] do_vmi_munmap+0x1f1/0x2b0 [ 35.625870] __vm_munmap+0x138/0x3a0 [ 35.626419] __x64_sys_munmap+0x59/0x80 [ 35.627006] do_syscall_64+0x3f/0x90 [ 35.627566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.628332] [ 35.628583] Second to last potentially related work creation: [ 35.629413] kasan_save_stack+0x22/0x50 [ 35.630008] __kasan_record_aux_stack+0x8e/0xa0 [ 35.630684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.631443] remove_vma+0x139/0x170 [ 35.631975] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.632634] do_vmi_munmap+0x1f1/0x2b0 [ 35.633208] mmap_region+0x1f9/0x2660 [ 35.633790] do_mmap+0x854/0xf00 [ 35.634299] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.634876] ksys_mmap_pgoff+0x3af/0x500 [ 35.635469] do_syscall_64+0x3f/0x90 [ 35.636028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.636787] [ 35.637039] The buggy address belongs to the object at ffff88800e1fb740 [ 35.637039] which belongs to the cache vm_area_struct of size 168 [ 35.638799] The buggy address is located 88 bytes inside of [ 35.638799] freed 168-byte region [ffff88800e1fb740, ffff88800e1fb7e8) [ 35.640464] [ 35.640717] The buggy address belongs to the physical page: [ 35.641509] page:00000000e330e98c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1fb [ 35.642793] memcg:ffff88800d352401 [ 35.643300] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.644062] page_type: 0xffffffff() [ 35.644594] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 35.645689] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d352401 [ 35.646767] page dumped because: kasan: bad access detected [ 35.647550] [ 35.647802] Memory state around the buggy address: [ 35.648489] ffff88800e1fb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.649515] ffff88800e1fb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.650528] >ffff88800e1fb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.651536] ^ [ 35.652121] ffff88800e1fb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.653135] ffff88800e1fb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.654148] ================================================================== [ 35.655269] Disabling lock debugging due to kernel taint [ 37.796133] BUG: Bad rss-counter state mm:0000000047089c95 type:MM_FILEPAGES val:33 [ 37.797162] BUG: Bad rss-counter state mm:0000000047089c95 type:MM_ANONPAGES val:22 [ 38.268913] BUG: Bad rss-counter state mm:00000000a4c3b8a0 type:MM_FILEPAGES val:33 [ 38.270261] BUG: Bad rss-counter state mm:00000000a4c3b8a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12697' (ECDSA) to the list of known hosts. 2023/06/20 00:59:42 fuzzer started 2023/06/20 00:59:42 dialing manager at localhost:44161 2023/06/20 00:59:42 checking machine... 2023/06/20 00:59:42 checking revisions... [ 38.943605] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:59:42 testing simple program... [ 38.992779] cgroup: Unknown subsys name 'net' [ 39.055865] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:59:37 Registers: info registers vcpu 0 RAX=0000000000000072 RBX=00005615509d0d00 RCX=0000000000000001 RDX=00007fbf63dd4003 RSI=00007fbf63dd415e RDI=00005615509d0d00 RBP=00007fbf63dd415e RSP=00007ffffed2f7c0 R8 =00007fbf64391f60 R9 =00007fbf64390be0 R10=000000000000006e R11=0000000000000000 R12=00007fbf63dd4003 R13=00005615509d0d00 R14=0000000000000001 R15=00005615509c9450 RIP=00007fbf642531cb 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 00007fbf63dde900 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=00007fbf643960b0 CR3=000000001ac14000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=ffff888008c58400 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=00007fffa4de1a68 CR3=000000000e4d4000 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=2032343a39353a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a39353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000