syzkaller login: [ 30.920735] BUG: Bad rss-counter state mm:00000000c0ad48b7 type:MM_FILEPAGES val:33 [ 30.922070] BUG: Bad rss-counter state mm:00000000c0ad48b7 type:MM_ANONPAGES val:22 [ 31.096023] ================================================================== [ 31.096974] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.097935] Read of size 8 at addr ffff88800ecd8880 by task sshd/219 [ 31.098877] [ 31.099096] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.099983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.100966] Call Trace: [ 31.101289] [ 31.101576] dump_stack_lvl+0x91/0xf0 [ 31.102109] print_report+0xcc/0x620 [ 31.102594] ? __virt_addr_valid+0x102/0x340 [ 31.103164] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.103802] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.104421] kasan_report+0xbe/0xf0 [ 31.104908] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.105532] vma_interval_tree_remove+0xc75/0xec0 [ 31.106171] vma_prepare+0xc54/0x11a0 [ 31.106675] __split_vma+0x5af/0x950 [ 31.107148] ? __pfx___split_vma+0x10/0x10 [ 31.107701] ? find_held_lock+0x2c/0x110 [ 31.108227] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.108807] ? lock_is_held_type+0x9f/0x120 [ 31.109344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.109969] ? mtree_range_walk+0x632/0x900 [ 31.110551] ? mas_walk+0x5c7/0x7c0 [ 31.111047] do_vmi_munmap+0x1f1/0x2b0 [ 31.111548] mmap_region+0x1f9/0x2660 [ 31.112067] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.112585] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.113311] ? __pfx_lock_acquire+0x10/0x10 [ 31.113859] ? __pfx_mmap_region+0x10/0x10 [ 31.114412] ? security_mmap_addr+0x7d/0xa0 [ 31.114966] ? get_unmapped_area+0x1f5/0x3f0 [ 31.115529] do_mmap+0x854/0xf00 [ 31.116004] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.116511] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.117084] ksys_mmap_pgoff+0x3af/0x500 [ 31.117596] do_syscall_64+0x3f/0x90 [ 31.118113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.118781] RIP: 0033:0x7f1b2bbe5d82 [ 31.119241] 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 [ 31.121406] RSP: 002b:00007ffeb3af7108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.122329] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b2bbe5d82 [ 31.123190] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b2b01f000 [ 31.124061] RBP: 00007f1b2b01f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.124923] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579bd441f70 [ 31.125785] R13: 00007ffeb3af7120 R14: 00007ffeb3af7150 R15: 00007ffeb3af74b0 [ 31.126687] [ 31.126980] [ 31.127195] Allocated by task 212: [ 31.127629] kasan_save_stack+0x22/0x50 [ 31.128158] kasan_set_track+0x25/0x30 [ 31.128665] __kasan_slab_alloc+0x59/0x70 [ 31.129189] kmem_cache_alloc+0x16b/0x370 [ 31.129721] vm_area_dup+0x20/0x160 [ 31.130186] __split_vma+0x170/0x950 [ 31.130668] split_vma+0xc6/0x110 [ 31.131111] mprotect_fixup+0x8d2/0xb30 [ 31.131617] do_mprotect_pkey+0x87e/0xd40 [ 31.132161] __x64_sys_mprotect+0x78/0xc0 [ 31.132702] do_syscall_64+0x3f/0x90 [ 31.133176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.133833] [ 31.134066] Freed by task 212: [ 31.134463] kasan_save_stack+0x22/0x50 [ 31.134997] kasan_set_track+0x25/0x30 [ 31.135497] kasan_save_free_info+0x2b/0x50 [ 31.136055] __kasan_slab_free+0x10a/0x190 [ 31.136591] kmem_cache_free+0x10d/0x4d0 [ 31.137117] rcu_core+0x8c8/0x2860 [ 31.137568] __do_softirq+0x1b7/0x7d4 [ 31.138086] [ 31.138305] Last potentially related work creation: [ 31.138912] kasan_save_stack+0x22/0x50 [ 31.139422] __kasan_record_aux_stack+0x8e/0xa0 [ 31.140022] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.140701] remove_vma+0x139/0x170 [ 31.141153] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.141737] do_vmi_munmap+0x1f1/0x2b0 [ 31.142239] __vm_munmap+0x138/0x3a0 [ 31.142730] __x64_sys_munmap+0x59/0x80 [ 31.143229] do_syscall_64+0x3f/0x90 [ 31.143744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.144392] [ 31.144612] The buggy address belongs to the object at ffff88800ecd8828 [ 31.144612] which belongs to the cache vm_area_struct of size 168 [ 31.146143] The buggy address is located 88 bytes inside of [ 31.146143] freed 168-byte region [ffff88800ecd8828, ffff88800ecd88d0) [ 31.147563] [ 31.147803] The buggy address belongs to the physical page: [ 31.148461] page:000000009cbaffc3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecd8 [ 31.149567] memcg:ffff8880144ecb01 [ 31.150004] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.150680] page_type: 0xffffffff() [ 31.151131] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.152067] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144ecb01 [ 31.153004] page dumped because: kasan: bad access detected [ 31.153674] [ 31.153888] Memory state around the buggy address: [ 31.154499] ffff88800ecd8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.155373] ffff88800ecd8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.156248] >ffff88800ecd8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.157110] ^ [ 31.157530] ffff88800ecd8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.158410] ffff88800ecd8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.159276] ================================================================== [ 31.160348] Disabling lock debugging due to kernel taint [ 33.062938] BUG: Bad rss-counter state mm:00000000884492d8 type:MM_FILEPAGES val:33 [ 33.063931] BUG: Bad rss-counter state mm:00000000884492d8 type:MM_ANONPAGES val:22 [ 33.674399] BUG: Bad rss-counter state mm:000000008f697dbd type:MM_FILEPAGES val:33 [ 33.675716] BUG: Bad rss-counter state mm:000000008f697dbd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64217' (ECDSA) to the list of known hosts. 2023/06/21 09:38:40 fuzzer started 2023/06/21 09:38:40 dialing manager at localhost:36067 2023/06/21 09:38:40 checking machine... 2023/06/21 09:38:40 checking revisions... [ 34.295236] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:38:40 testing simple program... [ 34.338147] cgroup: Unknown subsys name 'net' [ 34.382227] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:38:39 Registers: info registers vcpu 0 RAX=ffffffff8121b48b RBX=ffffffff813ad470 RCX=ffffffff860a1201 RDX=1ffff110011b3f3a RSI=ffffffff8121b48b RDI=ffff888008d9fa40 RBP=ffff888008d9fa10 RSP=ffff888008d9f970 R8 =ffffffff860a12fa R9 =ffff888008d9f9b8 R10=0000000000038001 R11=00000000000078fb R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800fd44080 RIP=ffffffff813ad474 RFL=00000286 [--S--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=00007f7c5b3b99d0 CR3=000000000d802000 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=553b746d8321067200000000000ae988 XMM05=9b44ec97e33ef07c0000000000133938 XMM06=806171799158d9670000000000132728 XMM07=fb795ef6d657705600000000001229e0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=5c8ed799b4599200 RBX=0000000000092cc0 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81787d2a RDI=ffffffff856cd6a0 RBP=1ffff110039d8f6b RSP=ffff88801cec7b48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff856cd6a0 R13=ffffffff81787d2a R14=0000000000000001 R15=ffffffff8184725c RIP=ffffffff812d86b9 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 00007fb1dc31e900 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=00007fff1ea9d000 CR3=000000000fdc6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000