syzkaller login: [ 30.047442] BUG: Bad rss-counter state mm:000000002e10a04f type:MM_FILEPAGES val:33 [ 30.048763] BUG: Bad rss-counter state mm:000000002e10a04f type:MM_ANONPAGES val:22 [ 30.200370] ================================================================== [ 30.201362] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.202375] Read of size 8 at addr ffff88800ef40df0 by task sshd/220 [ 30.203196] [ 30.203437] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.204533] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.205596] Call Trace: [ 30.205937] [ 30.206250] dump_stack_lvl+0x91/0xf0 [ 30.206806] print_report+0xcc/0x620 [ 30.207322] ? __virt_addr_valid+0x102/0x340 [ 30.207913] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.208590] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.209261] kasan_report+0xbe/0xf0 [ 30.209793] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.210452] vma_interval_tree_remove+0xc75/0xec0 [ 30.211094] vma_prepare+0xc54/0x11a0 [ 30.211612] __split_vma+0x5af/0x950 [ 30.212117] ? __pfx___split_vma+0x10/0x10 [ 30.212681] ? find_held_lock+0x2c/0x110 [ 30.213231] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.213860] ? lock_is_held_type+0x9f/0x120 [ 30.214432] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.215072] ? mtree_range_walk+0x632/0x900 [ 30.215658] ? mas_walk+0x5c7/0x7c0 [ 30.216164] do_vmi_munmap+0x1f1/0x2b0 [ 30.216681] mmap_region+0x1f9/0x2660 [ 30.217195] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.217755] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.218511] ? __pfx_lock_acquire+0x10/0x10 [ 30.219074] ? __pfx_mmap_region+0x10/0x10 [ 30.219634] ? security_mmap_addr+0x7d/0xa0 [ 30.220200] ? get_unmapped_area+0x1f5/0x3f0 [ 30.220782] do_mmap+0x854/0xf00 [ 30.221251] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.221804] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.222403] ksys_mmap_pgoff+0x3af/0x500 [ 30.222940] do_syscall_64+0x3f/0x90 [ 30.223455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.224143] RIP: 0033:0x7f31a3846d82 [ 30.224626] 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 [ 30.226889] RSP: 002b:00007fffe2fba4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.227850] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31a3846d82 [ 30.228749] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31a2c80000 [ 30.229678] RBP: 00007f31a2c80000 R08: 0000000000000009 R09: 0000000000001000 [ 30.230578] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644200b5ec0 [ 30.231482] R13: 00007fffe2fba4d0 R14: 00007fffe2fba500 R15: 00007fffe2fba860 [ 30.232394] [ 30.232708] [ 30.232938] Allocated by task 213: [ 30.233392] kasan_save_stack+0x22/0x50 [ 30.233953] kasan_set_track+0x25/0x30 [ 30.234484] __kasan_slab_alloc+0x59/0x70 [ 30.235042] kmem_cache_alloc+0x16b/0x370 [ 30.235590] vm_area_dup+0x20/0x160 [ 30.236070] __split_vma+0x170/0x950 [ 30.236567] split_vma+0xc6/0x110 [ 30.237032] mprotect_fixup+0x8d2/0xb30 [ 30.237582] do_mprotect_pkey+0x87e/0xd40 [ 30.238133] __x64_sys_mprotect+0x78/0xc0 [ 30.238694] do_syscall_64+0x3f/0x90 [ 30.239216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.239893] [ 30.240121] Freed by task 213: [ 30.240534] kasan_save_stack+0x22/0x50 [ 30.241071] kasan_set_track+0x25/0x30 [ 30.241602] kasan_save_free_info+0x2b/0x50 [ 30.242167] __kasan_slab_free+0x10a/0x190 [ 30.242729] kmem_cache_free+0x10d/0x4d0 [ 30.243262] rcu_core+0x8c8/0x2860 [ 30.243729] __do_softirq+0x1b7/0x7d4 [ 30.244230] [ 30.244451] Last potentially related work creation: [ 30.245071] kasan_save_stack+0x22/0x50 [ 30.245680] __kasan_record_aux_stack+0x8e/0xa0 [ 30.246282] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.246961] remove_vma+0x139/0x170 [ 30.247443] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.248031] do_vmi_munmap+0x1f1/0x2b0 [ 30.248560] __vm_munmap+0x138/0x3a0 [ 30.249044] __x64_sys_munmap+0x59/0x80 [ 30.249590] do_syscall_64+0x3f/0x90 [ 30.250097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.250779] [ 30.251004] The buggy address belongs to the object at ffff88800ef40d98 [ 30.251004] which belongs to the cache vm_area_struct of size 168 [ 30.252562] The buggy address is located 88 bytes inside of [ 30.252562] freed 168-byte region [ffff88800ef40d98, ffff88800ef40e40) [ 30.254061] [ 30.254302] The buggy address belongs to the physical page: [ 30.255003] page:00000000c8b5b96f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef40 [ 30.256166] memcg:ffff888016bbcf01 [ 30.256625] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.257311] page_type: 0xffffffff() [ 30.257813] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.258791] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016bbcf01 [ 30.259775] page dumped because: kasan: bad access detected [ 30.260478] [ 30.260707] Memory state around the buggy address: [ 30.261321] ffff88800ef40c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.262245] ffff88800ef40d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.263157] >ffff88800ef40d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.264068] ^ [ 30.264921] ffff88800ef40e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.265859] ffff88800ef40e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.266753] ================================================================== [ 30.267809] Disabling lock debugging due to kernel taint [ 32.391964] BUG: Bad rss-counter state mm:000000006bd69f26 type:MM_FILEPAGES val:33 [ 32.392966] BUG: Bad rss-counter state mm:000000006bd69f26 type:MM_ANONPAGES val:22 [ 32.835200] BUG: Bad rss-counter state mm:000000005a18ad6b type:MM_FILEPAGES val:33 [ 32.836395] BUG: Bad rss-counter state mm:000000005a18ad6b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24929' (ECDSA) to the list of known hosts. 2023/06/19 14:53:16 fuzzer started 2023/06/19 14:53:17 dialing manager at localhost:44161 2023/06/19 14:53:17 checking machine... 2023/06/19 14:53:17 checking revisions... [ 33.574800] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:53:17 testing simple program... [ 33.630723] cgroup: Unknown subsys name 'net' [ 33.680424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:53:16 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=0000000000000001 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=00007ffef17177d8 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=00007fa172f5d5100000558e47bea790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a57c29 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a2954 RDI=ffffffff852be148 RBP=ffff88801436fd28 RSP=ffff88801436fc60 R8 =0000000000000006 R9 =0000000000000101 R10=00000000000000c6 R11=0000000000000000 R12=0000000000000015 R13=ffff88801436fd60 R14=0000000000000015 R15=ffffc9000068d5c8 RIP=ffffffff815a298f 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 00007f18a2d6b900 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=00007fcc0257c650 CR3=000000000d99e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=35bd35155f3346cb00000000000ae988 XMM05=1abad08afa60f9520000000000135590 XMM06=74f1f006455717720000000000134330 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000