syzkaller login: [ 31.249356] BUG: Bad rss-counter state mm:000000007a4ef724 type:MM_FILEPAGES val:33 [ 31.250431] BUG: Bad rss-counter state mm:000000007a4ef724 type:MM_ANONPAGES val:22 [ 31.349106] ================================================================== [ 31.349607] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.350119] Read of size 8 at addr ffff888015e45d08 by task sshd/220 [ 31.350538] [ 31.350656] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.351124] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.351682] Call Trace: [ 31.351863] [ 31.352088] dump_stack_lvl+0x91/0xf0 [ 31.352464] print_report+0xcc/0x620 [ 31.352832] ? __virt_addr_valid+0x102/0x340 [ 31.353254] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.353715] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354182] kasan_report+0xbe/0xf0 [ 31.354604] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.355123] vma_interval_tree_remove+0xc75/0xec0 [ 31.355605] vma_prepare+0xc54/0x11a0 [ 31.355973] __split_vma+0x5af/0x950 [ 31.356340] ? __pfx___split_vma+0x10/0x10 [ 31.356746] ? find_held_lock+0x2c/0x110 [ 31.357147] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.357588] ? lock_is_held_type+0x9f/0x120 [ 31.358011] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.358484] ? mtree_range_walk+0x632/0x900 [ 31.358909] ? mas_walk+0x5c7/0x7c0 [ 31.359293] do_vmi_munmap+0x1f1/0x2b0 [ 31.359677] mmap_region+0x1f9/0x2660 [ 31.360042] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.360341] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.360762] ? __pfx_lock_acquire+0x10/0x10 [ 31.361072] ? __pfx_mmap_region+0x10/0x10 [ 31.361378] ? security_mmap_addr+0x7d/0xa0 [ 31.361684] ? get_unmapped_area+0x1f5/0x3f0 [ 31.361999] do_mmap+0x854/0xf00 [ 31.362254] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.362543] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.362878] ksys_mmap_pgoff+0x3af/0x500 [ 31.363188] do_syscall_64+0x3f/0x90 [ 31.363473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.363845] RIP: 0033:0x7fd00c667d82 [ 31.364112] 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 [ 31.365364] RSP: 002b:00007fff97fdd0d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.365897] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd00c667d82 [ 31.366398] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd00baa1000 [ 31.366890] RBP: 00007fd00baa1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.367399] R10: 0000000000000812 R11: 0000000000000206 R12: 000056410f042f70 [ 31.367898] R13: 00007fff97fdd0f0 R14: 00007fff97fdd120 R15: 00007fff97fdd480 [ 31.368409] [ 31.368578] [ 31.368704] Allocated by task 213: [ 31.368953] kasan_save_stack+0x22/0x50 [ 31.369238] kasan_set_track+0x25/0x30 [ 31.369525] __kasan_slab_alloc+0x59/0x70 [ 31.369829] kmem_cache_alloc+0x16b/0x370 [ 31.370133] vm_area_dup+0x20/0x160 [ 31.370400] __split_vma+0x170/0x950 [ 31.370671] split_vma+0xc6/0x110 [ 31.370923] mprotect_fixup+0x8d2/0xb30 [ 31.371220] do_mprotect_pkey+0x87e/0xd40 [ 31.371520] __x64_sys_mprotect+0x78/0xc0 [ 31.371821] do_syscall_64+0x3f/0x90 [ 31.372098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.372477] [ 31.372599] Freed by task 203: [ 31.372822] kasan_save_stack+0x22/0x50 [ 31.373112] kasan_set_track+0x25/0x30 [ 31.373398] kasan_save_free_info+0x2b/0x50 [ 31.373703] __kasan_slab_free+0x10a/0x190 [ 31.374011] kmem_cache_free+0x10d/0x4d0 [ 31.374308] rcu_core+0x8c8/0x2860 [ 31.374566] __do_softirq+0x1b7/0x7d4 [ 31.374841] [ 31.374963] Last potentially related work creation: [ 31.375309] kasan_save_stack+0x22/0x50 [ 31.375599] __kasan_record_aux_stack+0x8e/0xa0 [ 31.375930] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.376296] remove_vma+0x139/0x170 [ 31.376556] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.376879] do_vmi_munmap+0x1f1/0x2b0 [ 31.377161] __vm_munmap+0x138/0x3a0 [ 31.377425] __x64_sys_munmap+0x59/0x80 [ 31.377716] do_syscall_64+0x3f/0x90 [ 31.377993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.378363] [ 31.378483] The buggy address belongs to the object at ffff888015e45cb0 [ 31.378483] which belongs to the cache vm_area_struct of size 168 [ 31.379354] The buggy address is located 88 bytes inside of [ 31.379354] freed 168-byte region [ffff888015e45cb0, ffff888015e45d58) [ 31.380180] [ 31.380309] The buggy address belongs to the physical page: [ 31.380691] page:000000006f808bb0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e45 [ 31.381327] memcg:ffff888016b75301 [ 31.381573] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.381956] page_type: 0xffffffff() [ 31.382215] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.382755] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b75301 [ 31.383293] page dumped because: kasan: bad access detected [ 31.383689] [ 31.383811] Memory state around the buggy address: [ 31.384155] ffff888015e45c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.384680] ffff888015e45c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.385148] >ffff888015e45d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.385605] ^ [ 31.385842] ffff888015e45d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.386301] ffff888015e45e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.386758] ================================================================== [ 31.387252] Disabling lock debugging due to kernel taint [ 33.241489] BUG: Bad rss-counter state mm:0000000072a765fc type:MM_FILEPAGES val:33 [ 33.242471] BUG: Bad rss-counter state mm:0000000072a765fc type:MM_ANONPAGES val:22 [ 33.737875] BUG: Bad rss-counter state mm:00000000cffc19bb type:MM_FILEPAGES val:33 [ 33.738885] BUG: Bad rss-counter state mm:00000000cffc19bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57883' (ECDSA) to the list of known hosts. 2023/06/20 18:19:55 fuzzer started 2023/06/20 18:19:55 dialing manager at localhost:36067 2023/06/20 18:19:55 checking machine... 2023/06/20 18:19:55 checking revisions... [ 34.504255] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:19:55 testing simple program... [ 34.556484] cgroup: Unknown subsys name 'net' [ 34.594134] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:19:55 Registers: info registers vcpu 0 RAX=ffffffff85492ba0 RBX=ffffffff85d3e490 RCX=0000000000000000 RDX=0000000000000002 RSI=ffffffff849053a0 RDI=ffffffff87f346c0 RBP=ffff88801919a5f0 RSP=ffff88800d95fcd8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000004 R11=00000000000b6a61 R12=ffffffff87f346c0 R13=0000000000000000 R14=ffffffff87b6a200 R15=ffff88801919a650 RIP=ffffffff812c19c8 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 00007fb9d3541900 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=00007fb9d3af6650 CR3=000000000f252000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800dc69bc0 RCX=0000000000000000 RDX=ffff88806cf39fe8 RSI=1ffff1100d9e73fd RDI=ffff88806cf395d0 RBP=ffff88806cf395c0 RSP=ffff88801743f9c8 R8 =000000000001cc00 R9 =ffff88806cf3965c R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000000009 R14=dffffc0000000000 R15=ffff88806cf39fe8 RIP=ffffffff81260922 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 00007f52d9eb5700 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=00007f1b424d1310 CR3=000000000ed44000 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=2035353a39313a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a39313a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000