syzkaller login: [ 30.957516] BUG: Bad rss-counter state mm:000000001ad50ebb type:MM_FILEPAGES val:33 [ 30.958974] BUG: Bad rss-counter state mm:000000001ad50ebb type:MM_ANONPAGES val:22 [ 31.106630] ================================================================== [ 31.107589] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.108539] Read of size 8 at addr ffff88800e42ddf0 by task sshd/220 [ 31.109327] [ 31.109553] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.110611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.111613] Call Trace: [ 31.111937] [ 31.112246] dump_stack_lvl+0x91/0xf0 [ 31.112736] print_report+0xcc/0x620 [ 31.113227] ? __virt_addr_valid+0x102/0x340 [ 31.113785] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.114412] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.115027] kasan_report+0xbe/0xf0 [ 31.115517] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.116156] vma_interval_tree_remove+0xc75/0xec0 [ 31.116755] vma_prepare+0xc54/0x11a0 [ 31.117231] __split_vma+0x5af/0x950 [ 31.117709] ? __pfx___split_vma+0x10/0x10 [ 31.118231] ? find_held_lock+0x2c/0x110 [ 31.118755] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.119334] ? lock_is_held_type+0x9f/0x120 [ 31.119876] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.120488] ? mtree_range_walk+0x632/0x900 [ 31.121042] ? mas_walk+0x5c7/0x7c0 [ 31.121518] do_vmi_munmap+0x1f1/0x2b0 [ 31.122009] mmap_region+0x1f9/0x2660 [ 31.122494] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.123009] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.123739] ? __pfx_lock_acquire+0x10/0x10 [ 31.124274] ? __pfx_mmap_region+0x10/0x10 [ 31.124810] ? security_mmap_addr+0x7d/0xa0 [ 31.125336] ? get_unmapped_area+0x1f5/0x3f0 [ 31.125886] do_mmap+0x854/0xf00 [ 31.126328] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.126832] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.127406] ksys_mmap_pgoff+0x3af/0x500 [ 31.127922] do_syscall_64+0x3f/0x90 [ 31.128399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.129052] RIP: 0033:0x7f45a69b6d82 [ 31.129511] 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 [ 31.131641] RSP: 002b:00007ffe51d775a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.132536] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f45a69b6d82 [ 31.133402] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45a5df0000 [ 31.134263] RBP: 00007f45a5df0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.135110] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b5e3275b20 [ 31.135962] R13: 00007ffe51d775c0 R14: 00007ffe51d775f0 R15: 00007ffe51d77950 [ 31.136819] [ 31.137110] [ 31.137329] Allocated by task 213: [ 31.137754] kasan_save_stack+0x22/0x50 [ 31.138256] kasan_set_track+0x25/0x30 [ 31.138746] __kasan_slab_alloc+0x59/0x70 [ 31.139285] kmem_cache_alloc+0x16b/0x370 [ 31.139805] vm_area_dup+0x20/0x160 [ 31.140282] __split_vma+0x170/0x950 [ 31.140751] split_vma+0xc6/0x110 [ 31.141203] mprotect_fixup+0x8d2/0xb30 [ 31.141705] do_mprotect_pkey+0x87e/0xd40 [ 31.142233] __x64_sys_mprotect+0x78/0xc0 [ 31.142751] do_syscall_64+0x3f/0x90 [ 31.143226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.143906] [ 31.144119] Freed by task 213: [ 31.144512] kasan_save_stack+0x22/0x50 [ 31.145013] kasan_set_track+0x25/0x30 [ 31.145502] kasan_save_free_info+0x2b/0x50 [ 31.146037] __kasan_slab_free+0x10a/0x190 [ 31.146578] kmem_cache_free+0x10d/0x4d0 [ 31.147090] rcu_core+0x8c8/0x2860 [ 31.147559] __do_softirq+0x1b7/0x7d4 [ 31.148042] [ 31.148256] Last potentially related work creation: [ 31.148834] kasan_save_stack+0x22/0x50 [ 31.149343] __kasan_record_aux_stack+0x8e/0xa0 [ 31.149921] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.150569] remove_vma+0x139/0x170 [ 31.151108] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.151699] do_vmi_munmap+0x1f1/0x2b0 [ 31.152185] __vm_munmap+0x138/0x3a0 [ 31.152651] __x64_sys_munmap+0x59/0x80 [ 31.153152] do_syscall_64+0x3f/0x90 [ 31.153638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.154279] [ 31.154493] The buggy address belongs to the object at ffff88800e42dd98 [ 31.154493] which belongs to the cache vm_area_struct of size 168 [ 31.155984] The buggy address is located 88 bytes inside of [ 31.155984] freed 168-byte region [ffff88800e42dd98, ffff88800e42de40) [ 31.157410] [ 31.157627] The buggy address belongs to the physical page: [ 31.158280] page:0000000032fa58e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe42d [ 31.159394] memcg:ffff88800eadaf01 [ 31.159823] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.160523] page_type: 0xffffffff() [ 31.160980] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.161892] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eadaf01 [ 31.162811] page dumped because: kasan: bad access detected [ 31.163491] [ 31.163707] Memory state around the buggy address: [ 31.164289] ffff88800e42dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.165156] ffff88800e42dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.166010] >ffff88800e42dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.166856] ^ [ 31.167667] ffff88800e42de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.168517] ffff88800e42de80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.169383] ================================================================== [ 31.170443] Disabling lock debugging due to kernel taint [ 33.080777] BUG: Bad rss-counter state mm:000000001df5f181 type:MM_FILEPAGES val:31 [ 33.082067] BUG: Bad rss-counter state mm:000000001df5f181 type:MM_ANONPAGES val:22 [ 33.540403] BUG: Bad rss-counter state mm:00000000b35a0ffa type:MM_FILEPAGES val:33 [ 33.541444] BUG: Bad rss-counter state mm:00000000b35a0ffa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41844' (ECDSA) to the list of known hosts. 2023/06/20 13:08:59 fuzzer started 2023/06/20 13:08:59 dialing manager at localhost:36067 2023/06/20 13:08:59 checking machine... 2023/06/20 13:08:59 checking revisions... [ 34.268233] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:08:59 testing simple program... [ 34.317672] cgroup: Unknown subsys name 'net' [ 34.369011] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:08:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000003 RCX=0000000000000000 RDX=ffff88800fea51c0 RSI=ffffffff8224652f RDI=ffff888015d1be34 RBP=ffff888015d1bdc0 RSP=ffff888015c87470 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000003 R11=000008c4000008c4 R12=0000000000000001 R13=000000000000000b R14=ffff888015c874f0 R15=00000000fffbc3d1 RIP=ffffffff82246533 RFL=00000293 [--S-A-C] 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 00007fcf345dd900 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=00007fcf34b94618 CR3=0000000015fc2000 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=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=00007fed166575b0 CR3=000000000d5da000 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=790f9963e8e2af92b7411a1659e91ade XMM02=ec2efd57dc4c00df000000000011b1c0 XMM03=2270f59589ff0376000000000011b290 XMM04=fd155860357a2dc400000000000ae988 XMM05=19e9129bd510f23500000000001324d8 XMM06=52ee8bff7cdbe15f0000000000131340 XMM07=e042d86d42eb936e0000000000122970 XMM08=2270f59589ff0376000000000011b290 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000