syzkaller login: [ 30.485742] BUG: Bad rss-counter state mm:00000000d5b3cbc8 type:MM_FILEPAGES val:33 [ 30.487802] BUG: Bad rss-counter state mm:00000000d5b3cbc8 type:MM_ANONPAGES val:22 [ 30.656827] ================================================================== [ 30.657731] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.658658] Read of size 8 at addr ffff88800eb46310 by task sshd/220 [ 30.659413] [ 30.659636] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.660597] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.661555] Call Trace: [ 30.661868] [ 30.662149] dump_stack_lvl+0x91/0xf0 [ 30.662638] print_report+0xcc/0x620 [ 30.663122] ? __virt_addr_valid+0x102/0x340 [ 30.663677] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.664289] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.664926] kasan_report+0xbe/0xf0 [ 30.665397] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.666006] vma_interval_tree_remove+0xc75/0xec0 [ 30.666596] vma_prepare+0xc54/0x11a0 [ 30.667072] __split_vma+0x5af/0x950 [ 30.667534] ? __pfx___split_vma+0x10/0x10 [ 30.668051] ? find_held_lock+0x2c/0x110 [ 30.668567] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.669130] ? lock_is_held_type+0x9f/0x120 [ 30.669660] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.670262] ? mtree_range_walk+0x632/0x900 [ 30.670814] ? mas_walk+0x5c7/0x7c0 [ 30.671281] do_vmi_munmap+0x1f1/0x2b0 [ 30.671764] mmap_region+0x1f9/0x2660 [ 30.672238] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.672762] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.673459] ? __pfx_lock_acquire+0x10/0x10 [ 30.673994] ? __pfx_mmap_region+0x10/0x10 [ 30.674513] ? security_mmap_addr+0x7d/0xa0 [ 30.675040] ? get_unmapped_area+0x1f5/0x3f0 [ 30.675585] do_mmap+0x854/0xf00 [ 30.676014] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.676501] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.677063] ksys_mmap_pgoff+0x3af/0x500 [ 30.677565] do_syscall_64+0x3f/0x90 [ 30.678042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.678681] RIP: 0033:0x7f2788bf9d82 [ 30.679137] 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 [ 30.681254] RSP: 002b:00007ffe226ca2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.682160] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2788bf9d82 [ 30.682999] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2788033000 [ 30.683837] RBP: 00007f2788033000 R08: 0000000000000009 R09: 0000000000001000 [ 30.684683] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fcd2be7ec0 [ 30.685528] R13: 00007ffe226ca310 R14: 00007ffe226ca340 R15: 00007ffe226ca6a0 [ 30.686375] [ 30.686663] [ 30.686875] Allocated by task 213: [ 30.687296] kasan_save_stack+0x22/0x50 [ 30.687794] kasan_set_track+0x25/0x30 [ 30.688286] __kasan_slab_alloc+0x59/0x70 [ 30.688813] kmem_cache_alloc+0x16b/0x370 [ 30.689320] vm_area_dup+0x20/0x160 [ 30.689772] __split_vma+0x170/0x950 [ 30.690235] split_vma+0xc6/0x110 [ 30.690669] mprotect_fixup+0x8d2/0xb30 [ 30.691164] do_mprotect_pkey+0x87e/0xd40 [ 30.691677] __x64_sys_mprotect+0x78/0xc0 [ 30.692196] do_syscall_64+0x3f/0x90 [ 30.692679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.693327] [ 30.693540] Freed by task 213: [ 30.693934] kasan_save_stack+0x22/0x50 [ 30.694442] kasan_set_track+0x25/0x30 [ 30.694937] kasan_save_free_info+0x2b/0x50 [ 30.695466] __kasan_slab_free+0x10a/0x190 [ 30.695994] kmem_cache_free+0x10d/0x4d0 [ 30.696495] rcu_core+0x8c8/0x2860 [ 30.696942] __do_softirq+0x1b7/0x7d4 [ 30.697418] [ 30.697627] Last potentially related work creation: [ 30.698203] kasan_save_stack+0x22/0x50 [ 30.698696] __kasan_record_aux_stack+0x8e/0xa0 [ 30.699265] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.699897] remove_vma+0x139/0x170 [ 30.700338] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.700905] do_vmi_munmap+0x1f1/0x2b0 [ 30.701386] __vm_munmap+0x138/0x3a0 [ 30.701846] __x64_sys_munmap+0x59/0x80 [ 30.702338] do_syscall_64+0x3f/0x90 [ 30.702808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.703441] [ 30.703653] Second to last potentially related work creation: [ 30.704328] kasan_save_stack+0x22/0x50 [ 30.704834] __kasan_record_aux_stack+0x8e/0xa0 [ 30.705411] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.706042] remove_vma+0x139/0x170 [ 30.706489] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.707038] do_vmi_munmap+0x1f1/0x2b0 [ 30.707519] mmap_region+0x1f9/0x2660 [ 30.707992] do_mmap+0x854/0xf00 [ 30.708420] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.708907] ksys_mmap_pgoff+0x3af/0x500 [ 30.709401] do_syscall_64+0x3f/0x90 [ 30.709874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.710516] [ 30.710729] The buggy address belongs to the object at ffff88800eb462b8 [ 30.710729] which belongs to the cache vm_area_struct of size 168 [ 30.712174] The buggy address is located 88 bytes inside of [ 30.712174] freed 168-byte region [ffff88800eb462b8, ffff88800eb46360) [ 30.713575] [ 30.713786] The buggy address belongs to the physical page: [ 30.714439] page:00000000d46ec3b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb46 [ 30.715517] memcg:ffff88800eb37e01 [ 30.715935] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.716631] page_type: 0xffffffff() [ 30.717079] raw: 0100000000000200 ffff8880087a0c80 ffffea0000269080 dead000000000005 [ 30.717995] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb37e01 [ 30.718891] page dumped because: kasan: bad access detected [ 30.719540] [ 30.719752] Memory state around the buggy address: [ 30.720321] ffff88800eb46200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.721185] ffff88800eb46280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.722029] >ffff88800eb46300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.722875] ^ [ 30.723330] ffff88800eb46380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.724187] ffff88800eb46400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.725039] ================================================================== [ 30.726072] Disabling lock debugging due to kernel taint [ 33.318512] BUG: Bad rss-counter state mm:0000000082af5716 type:MM_FILEPAGES val:33 [ 33.319543] BUG: Bad rss-counter state mm:0000000082af5716 type:MM_ANONPAGES val:22 [ 33.792986] BUG: Bad rss-counter state mm:0000000080afb893 type:MM_FILEPAGES val:33 [ 33.794640] BUG: Bad rss-counter state mm:0000000080afb893 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38764' (ECDSA) to the list of known hosts. 2023/06/20 19:52:36 fuzzer started 2023/06/20 19:52:36 dialing manager at localhost:36067 2023/06/20 19:52:36 checking machine... 2023/06/20 19:52:36 checking revisions... [ 34.516377] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:52:36 testing simple program... [ 34.569510] cgroup: Unknown subsys name 'net' [ 34.610722] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:52:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880165eb680 RSI=ffffffff8170f695 RDI=0000000000000007 RBP=ffff88801a04fd90 RSP=ffff88801a04fbf8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea00006d2780 R13=ffff8880097f49f8 R14=ffff88801a04fdb8 R15=0000000000000000 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd3acb0c900 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=00007ffee34dd30c CR3=000000000c4d2000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c4567316d72657417322e3223242e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f4e9410b7f0 CR3=000000000dbc0000 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=2036333a32353a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a32353a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000