syzkaller login: [ 31.524100] BUG: Bad rss-counter state mm:000000003e37f759 type:MM_FILEPAGES val:33 [ 31.525670] BUG: Bad rss-counter state mm:000000003e37f759 type:MM_ANONPAGES val:22 [ 31.677128] ================================================================== [ 31.678146] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.679178] Read of size 8 at addr ffff888015e49968 by task sshd/220 [ 31.680166] [ 31.680399] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.681324] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.682408] Call Trace: [ 31.682752] [ 31.683057] dump_stack_lvl+0x91/0xf0 [ 31.683576] print_report+0xcc/0x620 [ 31.684088] ? __virt_addr_valid+0x102/0x340 [ 31.684671] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.685324] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.685989] kasan_report+0xbe/0xf0 [ 31.686499] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.687161] vma_interval_tree_remove+0xc75/0xec0 [ 31.687807] vma_prepare+0xc54/0x11a0 [ 31.688318] __split_vma+0x5af/0x950 [ 31.688842] ? __pfx___split_vma+0x10/0x10 [ 31.689415] ? find_held_lock+0x2c/0x110 [ 31.689984] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.690605] ? lock_is_held_type+0x9f/0x120 [ 31.691202] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.691877] ? mtree_range_walk+0x632/0x900 [ 31.692489] ? mas_walk+0x5c7/0x7c0 [ 31.693016] do_vmi_munmap+0x1f1/0x2b0 [ 31.693559] mmap_region+0x1f9/0x2660 [ 31.694110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.694682] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.695460] ? __pfx_lock_acquire+0x10/0x10 [ 31.696050] ? __pfx_mmap_region+0x10/0x10 [ 31.696632] ? security_mmap_addr+0x7d/0xa0 [ 31.697216] ? get_unmapped_area+0x1f5/0x3f0 [ 31.697827] do_mmap+0x854/0xf00 [ 31.698303] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.698849] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.699451] ksys_mmap_pgoff+0x3af/0x500 [ 31.699998] do_syscall_64+0x3f/0x90 [ 31.700509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.701198] RIP: 0033:0x7fd9facbad82 [ 31.701684] 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 [ 31.704001] RSP: 002b:00007ffce75a1978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.704995] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9facbad82 [ 31.705946] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9fa0f4000 [ 31.706852] RBP: 00007fd9fa0f4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.707754] R10: 0000000000000812 R11: 0000000000000206 R12: 00005630f66d1d90 [ 31.708661] R13: 00007ffce75a1990 R14: 00007ffce75a19c0 R15: 00007ffce75a1d20 [ 31.709577] [ 31.709914] [ 31.710147] Allocated by task 213: [ 31.710605] kasan_save_stack+0x22/0x50 [ 31.711147] kasan_set_track+0x25/0x30 [ 31.711676] __kasan_slab_alloc+0x59/0x70 [ 31.712240] kmem_cache_alloc+0x16b/0x370 [ 31.712792] vm_area_dup+0x20/0x160 [ 31.713278] __split_vma+0x170/0x950 [ 31.713787] split_vma+0xc6/0x110 [ 31.714280] mprotect_fixup+0x8d2/0xb30 [ 31.714834] do_mprotect_pkey+0x87e/0xd40 [ 31.715400] __x64_sys_mprotect+0x78/0xc0 [ 31.715982] do_syscall_64+0x3f/0x90 [ 31.716497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.717192] [ 31.717426] Freed by task 213: [ 31.717874] kasan_save_stack+0x22/0x50 [ 31.718421] kasan_set_track+0x25/0x30 [ 31.718959] kasan_save_free_info+0x2b/0x50 [ 31.719540] __kasan_slab_free+0x10a/0x190 [ 31.720122] kmem_cache_free+0x10d/0x4d0 [ 31.720676] rcu_core+0x8c8/0x2860 [ 31.721248] __do_softirq+0x1b7/0x7d4 [ 31.721780] [ 31.722017] Last potentially related work creation: [ 31.722652] kasan_save_stack+0x22/0x50 [ 31.723201] __kasan_record_aux_stack+0x8e/0xa0 [ 31.723828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.724540] remove_vma+0x139/0x170 [ 31.725034] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.725650] do_vmi_munmap+0x1f1/0x2b0 [ 31.726204] __vm_munmap+0x138/0x3a0 [ 31.726706] __x64_sys_munmap+0x59/0x80 [ 31.727238] do_syscall_64+0x3f/0x90 [ 31.727744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.728431] [ 31.728665] The buggy address belongs to the object at ffff888015e49910 [ 31.728665] which belongs to the cache vm_area_struct of size 168 [ 31.730262] The buggy address is located 88 bytes inside of [ 31.730262] freed 168-byte region [ffff888015e49910, ffff888015e499b8) [ 31.731811] [ 31.732051] The buggy address belongs to the physical page: [ 31.732778] page:00000000ddfbff0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e49 [ 31.733988] memcg:ffff88801869f701 [ 31.734469] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.735178] page_type: 0xffffffff() [ 31.735665] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.736657] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801869f701 [ 31.737621] page dumped because: kasan: bad access detected [ 31.738349] [ 31.738580] Memory state around the buggy address: [ 31.739214] ffff888015e49800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.740150] ffff888015e49880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.741089] >ffff888015e49900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.742015] ^ [ 31.742860] ffff888015e49980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.743778] ffff888015e49a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.744700] ================================================================== [ 31.745708] Disabling lock debugging due to kernel taint [ 34.530662] BUG: Bad rss-counter state mm:00000000608641a1 type:MM_FILEPAGES val:33 [ 34.531427] BUG: Bad rss-counter state mm:00000000608641a1 type:MM_ANONPAGES val:22 [ 34.936297] BUG: Bad rss-counter state mm:00000000be8bb87f type:MM_FILEPAGES val:33 [ 34.937058] BUG: Bad rss-counter state mm:00000000be8bb87f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45466' (ECDSA) to the list of known hosts. 2023/06/20 09:40:04 fuzzer started 2023/06/20 09:40:04 dialing manager at localhost:44161 2023/06/20 09:40:04 checking machine... 2023/06/20 09:40:04 checking revisions... [ 35.595944] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:40:04 testing simple program... [ 35.634823] cgroup: Unknown subsys name 'net' [ 35.689024] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:40:03 Registers: info registers vcpu 0 RAX=ffff88800da98001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800da97f01 RSI=ffff88800da97f18 RDI=ffff88806ce09aa8 RBP=ffff88800da97f18 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008ab99 R12=0000000000000008 R13=ffff88800da90000 R14=ffff88800da97f18 R15=ffff88806ce09a98 RIP=ffffffff811304ce RFL=00000282 [--S----] 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 00007f3012f7f900 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=00007f30123d9670 CR3=000000000d540000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f6a5da18a858633900000000000ae988 XMM05=b987ea7f79f1885500000000001355a0 XMM06=19e9129bd510f2350000000000134708 XMM07=fb795ef6d65770560000000000124b60 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888019fb0000 RSI=ffffffff844b1c33 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff888016227d68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff888016227e70 R14=ffffffffffffffff R15=1ffff11002c44faf RIP=ffffffff814c0800 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 00007f2c362cb900 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=00007f2c36290008 CR3=000000000f0d4000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000