syzkaller login: [ 43.515476] BUG: Bad rss-counter state mm:000000008a88c8ed type:MM_FILEPAGES val:33 [ 43.516824] BUG: Bad rss-counter state mm:000000008a88c8ed type:MM_ANONPAGES val:22 [ 43.675491] ================================================================== [ 43.676398] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.677335] Read of size 8 at addr ffff88800d87cdf0 by task sshd/221 [ 43.678096] [ 43.678324] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.679280] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.680251] Call Trace: [ 43.680575] [ 43.680890] dump_stack_lvl+0x91/0xf0 [ 43.681378] print_report+0xcc/0x620 [ 43.681857] ? __virt_addr_valid+0x102/0x340 [ 43.682422] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.683036] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.683648] kasan_report+0xbe/0xf0 [ 43.684120] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.684738] vma_interval_tree_remove+0xc75/0xec0 [ 43.685347] vma_prepare+0xc54/0x11a0 [ 43.685824] __split_vma+0x5af/0x950 [ 43.686319] ? __pfx___split_vma+0x10/0x10 [ 43.686847] ? find_held_lock+0x2c/0x110 [ 43.687369] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.687933] ? lock_is_held_type+0x9f/0x120 [ 43.688469] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.689084] ? mtree_range_walk+0x632/0x900 [ 43.689640] ? mas_walk+0x5c7/0x7c0 [ 43.690112] do_vmi_munmap+0x1f1/0x2b0 [ 43.690628] mmap_region+0x1f9/0x2660 [ 43.691109] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.691620] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.692338] ? __pfx_lock_acquire+0x10/0x10 [ 43.692862] ? __pfx_mmap_region+0x10/0x10 [ 43.693403] ? security_mmap_addr+0x7d/0xa0 [ 43.693942] ? get_unmapped_area+0x1f5/0x3f0 [ 43.694514] do_mmap+0x854/0xf00 [ 43.694951] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.695447] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.696010] ksys_mmap_pgoff+0x3af/0x500 [ 43.696528] do_syscall_64+0x3f/0x90 [ 43.697013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.697673] RIP: 0033:0x7f9e8f807d82 [ 43.698132] 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 [ 43.700311] RSP: 002b:00007ffef0893b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.701221] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e8f807d82 [ 43.702067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e8ec41000 [ 43.702952] RBP: 00007f9e8ec41000 R08: 0000000000000009 R09: 0000000000001000 [ 43.703818] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf54bd5d90 [ 43.704673] R13: 00007ffef0893ba0 R14: 00007ffef0893bd0 R15: 00007ffef0893f30 [ 43.705528] [ 43.705830] [ 43.706045] Allocated by task 213: [ 43.706482] kasan_save_stack+0x22/0x50 [ 43.706993] kasan_set_track+0x25/0x30 [ 43.707496] __kasan_slab_alloc+0x59/0x70 [ 43.708020] kmem_cache_alloc+0x16b/0x370 [ 43.708536] vm_area_dup+0x20/0x160 [ 43.709006] __split_vma+0x170/0x950 [ 43.709483] split_vma+0xc6/0x110 [ 43.709928] mprotect_fixup+0x8d2/0xb30 [ 43.710458] do_mprotect_pkey+0x87e/0xd40 [ 43.710978] __x64_sys_mprotect+0x78/0xc0 [ 43.711508] do_syscall_64+0x3f/0x90 [ 43.711990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.712649] [ 43.712863] Freed by task 213: [ 43.713253] kasan_save_stack+0x22/0x50 [ 43.713757] kasan_set_track+0x25/0x30 [ 43.714261] kasan_save_free_info+0x2b/0x50 [ 43.714789] __kasan_slab_free+0x10a/0x190 [ 43.715331] kmem_cache_free+0x10d/0x4d0 [ 43.715846] rcu_core+0x8c8/0x2860 [ 43.716294] __do_softirq+0x1b7/0x7d4 [ 43.716777] [ 43.716990] Last potentially related work creation: [ 43.717577] kasan_save_stack+0x22/0x50 [ 43.718080] __kasan_record_aux_stack+0x8e/0xa0 [ 43.718674] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.719320] remove_vma+0x139/0x170 [ 43.719769] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.720329] do_vmi_munmap+0x1f1/0x2b0 [ 43.720820] __vm_munmap+0x138/0x3a0 [ 43.721283] __x64_sys_munmap+0x59/0x80 [ 43.721787] do_syscall_64+0x3f/0x90 [ 43.722271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.722915] [ 43.723127] Second to last potentially related work creation: [ 43.723814] kasan_save_stack+0x22/0x50 [ 43.724335] __kasan_record_aux_stack+0x8e/0xa0 [ 43.724931] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.725597] remove_vma+0x139/0x170 [ 43.726065] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.726663] do_vmi_munmap+0x1f1/0x2b0 [ 43.727162] mmap_region+0x1f9/0x2660 [ 43.727662] do_mmap+0x854/0xf00 [ 43.728105] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.728614] ksys_mmap_pgoff+0x3af/0x500 [ 43.729135] do_syscall_64+0x3f/0x90 [ 43.729622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.730299] [ 43.730521] The buggy address belongs to the object at ffff88800d87cd98 [ 43.730521] which belongs to the cache vm_area_struct of size 168 [ 43.732047] The buggy address is located 88 bytes inside of [ 43.732047] freed 168-byte region [ffff88800d87cd98, ffff88800d87ce40) [ 43.733496] [ 43.733724] The buggy address belongs to the physical page: [ 43.734421] page:000000005bd0c793 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd87c [ 43.735553] memcg:ffff88800dc83901 [ 43.735995] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.736666] page_type: 0xffffffff() [ 43.737127] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 43.738087] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc83901 [ 43.739064] page dumped because: kasan: bad access detected [ 43.739746] [ 43.739971] Memory state around the buggy address: [ 43.740580] ffff88800d87cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 43.741476] ffff88800d87cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 43.742373] >ffff88800d87cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 43.743261] ^ [ 43.744100] ffff88800d87ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 43.744987] ffff88800d87ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.745872] ================================================================== [ 43.746869] Disabling lock debugging due to kernel taint [ 45.704446] BUG: Bad rss-counter state mm:000000006a8558ed type:MM_FILEPAGES val:33 [ 45.705644] BUG: Bad rss-counter state mm:000000006a8558ed type:MM_ANONPAGES val:22 [ 46.173285] BUG: Bad rss-counter state mm:000000003b4f0a14 type:MM_FILEPAGES val:33 [ 46.174288] BUG: Bad rss-counter state mm:000000003b4f0a14 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18518' (ECDSA) to the list of known hosts. 2023/06/19 23:02:01 fuzzer started 2023/06/19 23:02:02 dialing manager at localhost:44161 2023/06/19 23:02:02 checking machine... 2023/06/19 23:02:02 checking revisions... [ 46.889976] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:02:02 testing simple program... [ 46.939696] cgroup: Unknown subsys name 'net' [ 46.997003] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:01:57 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=00007fec098a2360 CR3=000000000f1ce000 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=2031303a32303a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a32303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016787f48 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016787e01 RSI=ffff888016787ef0 RDI=ffff888016787ef0 RBP=ffff888016787a58 RSP=ffff888016787990 R8 =0000000000000001 R9 =ffff888016787a40 R10=0000000000038001 R11=000000000008a96b R12=ffff888016787a60 R13=ffff888016787a48 R14=ffff888016787ef0 R15=ffff888016787a00 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007facc2a39900 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=00007ffddb2b3000 CR3=0000000009a26000 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