syzkaller login: [ 38.369386] BUG: Bad rss-counter state mm:0000000061ced6ec type:MM_FILEPAGES val:33 [ 38.370101] BUG: Bad rss-counter state mm:0000000061ced6ec type:MM_ANONPAGES val:22 [ 38.537216] ================================================================== [ 38.544309] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.546577] Read of size 8 at addr ffff88800e0f4968 by task sshd/221 [ 38.547080] [ 38.547224] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.547825] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.548458] Call Trace: [ 38.548675] <TASK> [ 38.548855] dump_stack_lvl+0x91/0xf0 [ 38.549318] print_report+0xcc/0x620 [ 38.549628] ? __virt_addr_valid+0x102/0x340 [ 38.549980] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.550376] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.550774] kasan_report+0xbe/0xf0 [ 38.551085] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.551497] vma_interval_tree_remove+0xc75/0xec0 [ 38.551887] vma_prepare+0xc54/0x11a0 [ 38.552199] __split_vma+0x5af/0x950 [ 38.552508] ? __pfx___split_vma+0x10/0x10 [ 38.554725] ? find_held_lock+0x2c/0x110 [ 38.555064] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.555475] ? lock_is_held_type+0x9f/0x120 [ 38.555822] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.556230] ? mtree_range_walk+0x632/0x900 [ 38.556618] ? mas_walk+0x5c7/0x7c0 [ 38.556929] do_vmi_munmap+0x1f1/0x2b0 [ 38.557251] mmap_region+0x1f9/0x2660 [ 38.557602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.561613] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.562796] ? __pfx_lock_acquire+0x10/0x10 [ 38.563152] ? __pfx_mmap_region+0x10/0x10 [ 38.563609] ? security_mmap_addr+0x7d/0xa0 [ 38.563967] ? get_unmapped_area+0x1f5/0x3f0 [ 38.564355] do_mmap+0x854/0xf00 [ 38.564891] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.565884] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.567119] ksys_mmap_pgoff+0x3af/0x500 [ 38.568147] do_syscall_64+0x3f/0x90 [ 38.569085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.570382] RIP: 0033:0x7f301bf44d82 [ 38.571480] 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 [ 38.574938] RSP: 002b:00007ffc360310a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.575982] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f301bf44d82 [ 38.576731] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f301b37e000 [ 38.578217] RBP: 00007f301b37e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.580046] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec12c2ff70 [ 38.581859] R13: 00007ffc360310c0 R14: 00007ffc360310f0 R15: 00007ffc36031450 [ 38.583653] </TASK> [ 38.584168] [ 38.584611] Allocated by task 214: [ 38.585497] kasan_save_stack+0x22/0x50 [ 38.586477] kasan_set_track+0x25/0x30 [ 38.587364] __kasan_slab_alloc+0x59/0x70 [ 38.588360] kmem_cache_alloc+0x16b/0x370 [ 38.589380] vm_area_dup+0x20/0x160 [ 38.590294] __split_vma+0x170/0x950 [ 38.591208] split_vma+0xc6/0x110 [ 38.592096] mprotect_fixup+0x8d2/0xb30 [ 38.593108] do_mprotect_pkey+0x87e/0xd40 [ 38.594678] __x64_sys_mprotect+0x78/0xc0 [ 38.595739] do_syscall_64+0x3f/0x90 [ 38.596715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.598022] [ 38.598500] Freed by task 19: [ 38.599226] kasan_save_stack+0x22/0x50 [ 38.600228] kasan_set_track+0x25/0x30 [ 38.601222] kasan_save_free_info+0x2b/0x50 [ 38.602331] __kasan_slab_free+0x10a/0x190 [ 38.603402] kmem_cache_free+0x10d/0x4d0 [ 38.604391] rcu_core+0x8c8/0x2860 [ 38.605281] __do_softirq+0x1b7/0x7d4 [ 38.606227] [ 38.606732] Last potentially related work creation: [ 38.607935] kasan_save_stack+0x22/0x50 [ 38.608874] __kasan_record_aux_stack+0x8e/0xa0 [ 38.610020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.611380] remove_vma+0x139/0x170 [ 38.612270] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.613477] do_vmi_munmap+0x1f1/0x2b0 [ 38.614373] __vm_munmap+0x138/0x3a0 [ 38.615311] __x64_sys_munmap+0x59/0x80 [ 38.616295] do_syscall_64+0x3f/0x90 [ 38.617262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.618664] [ 38.619036] Second to last potentially related work creation: [ 38.620390] kasan_save_stack+0x22/0x50 [ 38.621376] __kasan_record_aux_stack+0x8e/0xa0 [ 38.622576] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.623217] remove_vma+0x139/0x170 [ 38.623579] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.623993] do_vmi_munmap+0x1f1/0x2b0 [ 38.624332] mmap_region+0x1f9/0x2660 [ 38.624983] do_mmap+0x854/0xf00 [ 38.625814] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.626795] ksys_mmap_pgoff+0x3af/0x500 [ 38.627792] do_syscall_64+0x3f/0x90 [ 38.628496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.629579] [ 38.629961] The buggy address belongs to the object at ffff88800e0f4910 [ 38.629961] which belongs to the cache vm_area_struct of size 168 [ 38.631513] The buggy address is located 88 bytes inside of [ 38.631513] freed 168-byte region [ffff88800e0f4910, ffff88800e0f49b8) [ 38.633518] [ 38.633672] The buggy address belongs to the physical page: [ 38.634099] page:0000000020f397d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0f4 [ 38.634937] memcg:ffff88800cb14201 [ 38.635217] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.635730] page_type: 0xffffffff() [ 38.636036] raw: 0100000000000200 ffff8880087a0c80 ffffea0000385480 dead000000000004 [ 38.636714] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb14201 [ 38.637298] page dumped because: kasan: bad access detected [ 38.637797] [ 38.637940] Memory state around the buggy address: [ 38.638308] ffff88800e0f4800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.638949] ffff88800e0f4880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.639585] >ffff88800e0f4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.640163] ^ [ 38.641771] ffff88800e0f4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.643475] ffff88800e0f4a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.645133] ================================================================== [ 38.664691] Disabling lock debugging due to kernel taint [ 41.532683] BUG: Bad rss-counter state mm:00000000c0ebd25f type:MM_FILEPAGES val:33 [ 41.533360] BUG: Bad rss-counter state mm:00000000c0ebd25f type:MM_ANONPAGES val:22 [ 43.284809] BUG: Bad rss-counter state mm:000000007a095d66 type:MM_FILEPAGES val:33 [ 43.285484] BUG: Bad rss-counter state mm:000000007a095d66 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40604' (ECDSA) to the list of known hosts. 2023/06/21 10:24:09 fuzzer started 2023/06/21 10:24:09 dialing manager at localhost:36067 2023/06/21 10:24:09 checking machine... 2023/06/21 10:24:09 checking revisions... [ 44.189033] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:24:10 testing simple program... [ 44.233760] cgroup: Unknown subsys name 'net' [ 44.385480] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:24:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=ffffffff86138e01 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8180c705 RBP=ffff88806ce09af0 RSP=ffff88806ce09a70 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e66d080 RIP=ffffffff811fc875 RFL=00000046 [---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=00007f58aff56328 CR3=0000000005482000 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=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 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=ffff888008c04400 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=00007fd88b21d2a0 CR3=000000000cb8c000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=05baf9b8aa2637610000000000135558 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=61149f6b7c67c75700000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000