syzkaller login: [ 30.473591] BUG: Bad rss-counter state mm:0000000012f08a8c type:MM_FILEPAGES val:33 [ 30.474574] BUG: Bad rss-counter state mm:0000000012f08a8c type:MM_ANONPAGES val:22 [ 30.641416] ================================================================== [ 30.642306] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.643244] Read of size 8 at addr ffff8880094ac968 by task sshd/219 [ 30.643997] [ 30.644212] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.645163] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.646137] Call Trace: [ 30.646453] [ 30.646770] dump_stack_lvl+0x91/0xf0 [ 30.647262] print_report+0xcc/0x620 [ 30.647739] ? __virt_addr_valid+0x102/0x340 [ 30.648294] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.648902] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.649513] kasan_report+0xbe/0xf0 [ 30.649987] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.650601] vma_interval_tree_remove+0xc75/0xec0 [ 30.651216] vma_prepare+0xc54/0x11a0 [ 30.651692] __split_vma+0x5af/0x950 [ 30.652161] ? __pfx___split_vma+0x10/0x10 [ 30.652679] ? find_held_lock+0x2c/0x110 [ 30.653197] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.653754] ? lock_is_held_type+0x9f/0x120 [ 30.654291] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.654917] ? mtree_range_walk+0x632/0x900 [ 30.655468] ? mas_walk+0x5c7/0x7c0 [ 30.655938] do_vmi_munmap+0x1f1/0x2b0 [ 30.656445] mmap_region+0x1f9/0x2660 [ 30.656918] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.657432] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.658130] ? __pfx_lock_acquire+0x10/0x10 [ 30.658669] ? __pfx_mmap_region+0x10/0x10 [ 30.659198] ? security_mmap_addr+0x7d/0xa0 [ 30.659726] ? get_unmapped_area+0x1f5/0x3f0 [ 30.660269] do_mmap+0x854/0xf00 [ 30.660708] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.661212] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.661768] ksys_mmap_pgoff+0x3af/0x500 [ 30.662269] do_syscall_64+0x3f/0x90 [ 30.662749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.663392] RIP: 0033:0x7f2d4a08fd82 [ 30.663843] 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 [ 30.665937] RSP: 002b:00007ffe5f3b9e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.666839] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d4a08fd82 [ 30.667671] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d494c9000 [ 30.668509] RBP: 00007f2d494c9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.669345] R10: 0000000000000812 R11: 0000000000000206 R12: 00005593e5c07ec0 [ 30.670187] R13: 00007ffe5f3b9ea0 R14: 00007ffe5f3b9ed0 R15: 00007ffe5f3ba230 [ 30.671047] [ 30.671336] [ 30.671551] Allocated by task 212: [ 30.671972] kasan_save_stack+0x22/0x50 [ 30.672469] kasan_set_track+0x25/0x30 [ 30.672961] __kasan_slab_alloc+0x59/0x70 [ 30.673477] kmem_cache_alloc+0x16b/0x370 [ 30.673992] vm_area_dup+0x20/0x160 [ 30.674440] __split_vma+0x170/0x950 [ 30.674917] split_vma+0xc6/0x110 [ 30.675353] mprotect_fixup+0x8d2/0xb30 [ 30.675846] do_mprotect_pkey+0x87e/0xd40 [ 30.676364] __x64_sys_mprotect+0x78/0xc0 [ 30.676877] do_syscall_64+0x3f/0x90 [ 30.677348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.677993] [ 30.678205] Freed by task 212: [ 30.678599] kasan_save_stack+0x22/0x50 [ 30.679121] kasan_set_track+0x25/0x30 [ 30.679621] kasan_save_free_info+0x2b/0x50 [ 30.680144] __kasan_slab_free+0x10a/0x190 [ 30.680680] kmem_cache_free+0x10d/0x4d0 [ 30.681184] rcu_core+0x8c8/0x2860 [ 30.681629] __do_softirq+0x1b7/0x7d4 [ 30.682103] [ 30.682319] Last potentially related work creation: [ 30.682904] kasan_save_stack+0x22/0x50 [ 30.683415] __kasan_record_aux_stack+0x8e/0xa0 [ 30.683981] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.684623] remove_vma+0x139/0x170 [ 30.685072] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.685629] do_vmi_munmap+0x1f1/0x2b0 [ 30.686113] __vm_munmap+0x138/0x3a0 [ 30.686581] __x64_sys_munmap+0x59/0x80 [ 30.687085] do_syscall_64+0x3f/0x90 [ 30.687570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.688211] [ 30.688433] Second to last potentially related work creation: [ 30.689116] kasan_save_stack+0x22/0x50 [ 30.689614] __kasan_record_aux_stack+0x8e/0xa0 [ 30.690188] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.690846] remove_vma+0x139/0x170 [ 30.691299] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.691847] do_vmi_munmap+0x1f1/0x2b0 [ 30.692335] mmap_region+0x1f9/0x2660 [ 30.692806] do_mmap+0x854/0xf00 [ 30.693235] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.693721] ksys_mmap_pgoff+0x3af/0x500 [ 30.694216] do_syscall_64+0x3f/0x90 [ 30.694694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.695327] [ 30.695540] The buggy address belongs to the object at ffff8880094ac910 [ 30.695540] which belongs to the cache vm_area_struct of size 168 [ 30.696993] The buggy address is located 88 bytes inside of [ 30.696993] freed 168-byte region [ffff8880094ac910, ffff8880094ac9b8) [ 30.698379] [ 30.698592] The buggy address belongs to the physical page: [ 30.699242] page:00000000ce2fd717 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94ac [ 30.700316] memcg:ffff888009ca4601 [ 30.700737] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.701372] page_type: 0xffffffff() [ 30.701821] raw: 0100000000000200 ffff8880087a0c80 ffffea0000362900 dead000000000002 [ 30.702754] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009ca4601 [ 30.703645] page dumped because: kasan: bad access detected [ 30.704291] [ 30.704505] Memory state around the buggy address: [ 30.705073] ffff8880094ac800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.705911] ffff8880094ac880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.706766] >ffff8880094ac900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.707599] ^ [ 30.708370] ffff8880094ac980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.709230] ffff8880094aca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.710082] ================================================================== [ 30.711181] Disabling lock debugging due to kernel taint [ 33.436467] BUG: Bad rss-counter state mm:00000000f89791e0 type:MM_FILEPAGES val:33 [ 33.437464] BUG: Bad rss-counter state mm:00000000f89791e0 type:MM_ANONPAGES val:22 [ 33.907226] BUG: Bad rss-counter state mm:0000000046f90834 type:MM_FILEPAGES val:33 [ 33.908636] BUG: Bad rss-counter state mm:0000000046f90834 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27196' (ECDSA) to the list of known hosts. 2023/06/20 21:36:57 fuzzer started 2023/06/20 21:36:57 dialing manager at localhost:36067 2023/06/20 21:36:57 checking machine... 2023/06/20 21:36:57 checking revisions... [ 34.638635] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:36:58 testing simple program... [ 34.676219] cgroup: Unknown subsys name 'net' [ 34.722139] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:36:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=010000000000203a RCX=ffffffff81668833 RDX=1ffffd40000bc250 RSI=0000000000000008 RDI=ffffea00005e1280 RBP=ffffea00005e1280 RSP=ffff88800f167660 R8 =0000000000000000 R9 =fffff940000bc250 R10=ffffea00005e1287 R11=00000000000b6a61 R12=ffff888015e41488 R13=00000000000362c0 R14=ffff888015e41488 R15=0000000000000505 RIP=ffffffff81668852 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 00007f4363fff700 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=00007f31a83c0c50 CR3=00000000168ca000 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=2037353a36333a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a36333a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff87f97640 RCX=0000000000000000 RDX=ffff88800f3a1b40 RSI=ffffffff83c60a6a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800fd0f6a0 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000c0 R11=0000097600000976 R12=0000000000000000 R13=00000000000000c0 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c089b 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 00007f3f177e6900 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=00007ffdf9d63000 CR3=000000000f2d8000 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=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