syzkaller login: [ 34.476885] BUG: Bad rss-counter state mm:000000007eb126b1 type:MM_FILEPAGES val:33 [ 34.477788] BUG: Bad rss-counter state mm:000000007eb126b1 type:MM_ANONPAGES val:22 [ 34.595665] ================================================================== [ 34.596348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.597060] Read of size 8 at addr ffff88800ee6aed8 by task sshd/219 [ 34.597639] [ 34.597802] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.598447] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.599193] Call Trace: [ 34.599434] [ 34.599648] dump_stack_lvl+0x91/0xf0 [ 34.600009] print_report+0xcc/0x620 [ 34.600375] ? __virt_addr_valid+0x102/0x340 [ 34.600786] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.601247] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.601712] kasan_report+0xbe/0xf0 [ 34.602072] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.602542] vma_interval_tree_remove+0xc75/0xec0 [ 34.602992] vma_prepare+0xc54/0x11a0 [ 34.603362] __split_vma+0x5af/0x950 [ 34.603714] ? __pfx___split_vma+0x10/0x10 [ 34.604112] ? find_held_lock+0x2c/0x110 [ 34.604500] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.604919] ? lock_is_held_type+0x9f/0x120 [ 34.605323] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.605775] ? mtree_range_walk+0x632/0x900 [ 34.606188] ? mas_walk+0x5c7/0x7c0 [ 34.606553] do_vmi_munmap+0x1f1/0x2b0 [ 34.606920] mmap_region+0x1f9/0x2660 [ 34.607296] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.607678] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.608212] ? __pfx_lock_acquire+0x10/0x10 [ 34.608610] ? __pfx_mmap_region+0x10/0x10 [ 34.609003] ? security_mmap_addr+0x7d/0xa0 [ 34.609397] ? get_unmapped_area+0x1f5/0x3f0 [ 34.609813] do_mmap+0x854/0xf00 [ 34.610141] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.610508] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.610923] ksys_mmap_pgoff+0x3af/0x500 [ 34.611309] do_syscall_64+0x3f/0x90 [ 34.611666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.612144] RIP: 0033:0x7fe04b401d82 [ 34.612485] 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 [ 34.614072] RSP: 002b:00007ffd2d54ea48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.614752] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe04b401d82 [ 34.615400] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe04a83b000 [ 34.616029] RBP: 00007fe04a83b000 R08: 0000000000000009 R09: 0000000000001000 [ 34.616662] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2aa952b20 [ 34.617295] R13: 00007ffd2d54ea60 R14: 00007ffd2d54ea90 R15: 00007ffd2d54edf0 [ 34.617935] [ 34.618153] [ 34.618313] Allocated by task 212: [ 34.618632] kasan_save_stack+0x22/0x50 [ 34.619005] kasan_set_track+0x25/0x30 [ 34.619378] __kasan_slab_alloc+0x59/0x70 [ 34.619769] kmem_cache_alloc+0x16b/0x370 [ 34.620152] vm_area_dup+0x20/0x160 [ 34.620493] __split_vma+0x170/0x950 [ 34.620843] split_vma+0xc6/0x110 [ 34.621171] mprotect_fixup+0x8d2/0xb30 [ 34.621544] do_mprotect_pkey+0x87e/0xd40 [ 34.621930] __x64_sys_mprotect+0x78/0xc0 [ 34.622316] do_syscall_64+0x3f/0x90 [ 34.622672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.623151] [ 34.623311] Freed by task 212: [ 34.623598] kasan_save_stack+0x22/0x50 [ 34.623966] kasan_set_track+0x25/0x30 [ 34.624329] kasan_save_free_info+0x2b/0x50 [ 34.624722] __kasan_slab_free+0x10a/0x190 [ 34.625113] kmem_cache_free+0x10d/0x4d0 [ 34.625489] rcu_core+0x8c8/0x2860 [ 34.625815] __do_softirq+0x1b7/0x7d4 [ 34.626162] [ 34.626320] Last potentially related work creation: [ 34.626747] kasan_save_stack+0x22/0x50 [ 34.627132] __kasan_record_aux_stack+0x8e/0xa0 [ 34.627557] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.628036] remove_vma+0x139/0x170 [ 34.628365] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.628777] do_vmi_munmap+0x1f1/0x2b0 [ 34.629137] __vm_munmap+0x138/0x3a0 [ 34.629478] __x64_sys_munmap+0x59/0x80 [ 34.629843] do_syscall_64+0x3f/0x90 [ 34.630193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.630673] [ 34.630831] Second to last potentially related work creation: [ 34.631344] kasan_save_stack+0x22/0x50 [ 34.631713] __kasan_record_aux_stack+0x8e/0xa0 [ 34.632140] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.632612] remove_vma+0x139/0x170 [ 34.632947] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.633359] do_vmi_munmap+0x1f1/0x2b0 [ 34.633719] mmap_region+0x1f9/0x2660 [ 34.634070] do_mmap+0x854/0xf00 [ 34.634385] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.634746] ksys_mmap_pgoff+0x3af/0x500 [ 34.635126] do_syscall_64+0x3f/0x90 [ 34.635475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.635954] [ 34.636111] The buggy address belongs to the object at ffff88800ee6ae80 [ 34.636111] which belongs to the cache vm_area_struct of size 168 [ 34.637200] The buggy address is located 88 bytes inside of [ 34.637200] freed 168-byte region [ffff88800ee6ae80, ffff88800ee6af28) [ 34.638238] [ 34.638395] The buggy address belongs to the physical page: [ 34.638882] page:00000000c0198114 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee6a [ 34.639690] memcg:ffff88800ed9c101 [ 34.640000] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.640473] page_type: 0xffffffff() [ 34.640801] raw: 0100000000000200 ffff88800879fc80 ffffea00003b98c0 dead000000000002 [ 34.641482] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed9c101 [ 34.642148] page dumped because: kasan: bad access detected [ 34.642635] [ 34.642791] Memory state around the buggy address: [ 34.643230] ffff88800ee6ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.643855] ffff88800ee6ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 34.644481] >ffff88800ee6ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.645105] ^ [ 34.645640] ffff88800ee6af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 34.646261] ffff88800ee6af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.646881] ================================================================== [ 34.647738] Disabling lock debugging due to kernel taint [ 36.566920] BUG: Bad rss-counter state mm:0000000006c16a8b type:MM_FILEPAGES val:33 [ 36.568189] BUG: Bad rss-counter state mm:0000000006c16a8b type:MM_ANONPAGES val:22 [ 37.018584] BUG: Bad rss-counter state mm:00000000acf5e69d type:MM_FILEPAGES val:33 [ 37.019771] BUG: Bad rss-counter state mm:00000000acf5e69d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9473' (ECDSA) to the list of known hosts. 2023/06/19 10:58:11 fuzzer started 2023/06/19 10:58:12 dialing manager at localhost:44161 2023/06/19 10:58:12 checking machine... 2023/06/19 10:58:12 checking revisions... [ 37.660006] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:58:12 testing simple program... [ 37.706251] cgroup: Unknown subsys name 'net' [ 37.772661] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:58:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008d7f9a8 RSP=ffff888008d7f890 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888008d7f9b0 R13=ffff888008d7f998 R14=ffff888008d7f991 R15=ffff888008d7f950 RIP=ffffffff81130ad6 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 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=00007f6efadb1618 CR3=000000000e410000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f02c6ed6550 CR3=0000000013a74000 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=ece28a48fdff8d9f4546a591ac2f87a0 XMM02=000000000011c8d0eff9b2d0a8fce9cb XMM03=000000000011c9a02c67c8bc2e329bc3 XMM04=3eb264900095991d00000000000ae988 XMM05=19e9129bd510f2350000000000135300 XMM06=8514a1d3a71d2eb20000000000134168 XMM07=e042d86d42eb936e00000000001240d8 XMM08=28e7622f7f49bab2000000000011c9a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000