syzkaller login: [ 30.667173] BUG: Bad rss-counter state mm:0000000083feca67 type:MM_FILEPAGES val:33 [ 30.668381] BUG: Bad rss-counter state mm:0000000083feca67 type:MM_ANONPAGES val:22 [ 30.706573] ================================================================== [ 30.707683] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.708740] Read of size 8 at addr ffff8880165aa6b0 by task sshd/225 [ 30.709723] [ 30.709967] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.710903] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.712001] Call Trace: [ 30.712373] [ 30.712680] dump_stack_lvl+0x91/0xf0 [ 30.713216] print_report+0xcc/0x620 [ 30.713755] ? __virt_addr_valid+0x102/0x340 [ 30.714371] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.715047] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.715714] kasan_report+0xbe/0xf0 [ 30.716241] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.716929] vma_interval_tree_remove+0xc75/0xec0 [ 30.717578] vma_prepare+0xc54/0x11a0 [ 30.718098] __split_vma+0x5af/0x950 [ 30.718610] ? __pfx___split_vma+0x10/0x10 [ 30.719181] ? find_held_lock+0x2c/0x110 [ 30.719741] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.720393] ? lock_is_held_type+0x9f/0x120 [ 30.720985] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.721643] ? mtree_range_walk+0x632/0x900 [ 30.722240] ? mas_walk+0x5c7/0x7c0 [ 30.722762] do_vmi_munmap+0x1f1/0x2b0 [ 30.723319] mmap_region+0x1f9/0x2660 [ 30.723854] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.724417] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.725184] ? __pfx_lock_acquire+0x10/0x10 [ 30.725762] ? __pfx_mmap_region+0x10/0x10 [ 30.726338] ? security_mmap_addr+0x7d/0xa0 [ 30.726906] ? get_unmapped_area+0x1f5/0x3f0 [ 30.727493] do_mmap+0x854/0xf00 [ 30.727967] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.728529] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.729136] ksys_mmap_pgoff+0x3af/0x500 [ 30.729683] do_syscall_64+0x3f/0x90 [ 30.730196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.730894] RIP: 0033:0x7effac3bfd82 [ 30.731390] 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 [ 30.733660] RSP: 002b:00007fff10337928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.734882] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007effac3bfd82 [ 30.735799] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007effab7f9000 [ 30.736745] RBP: 00007effab7f9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.737644] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e62b44aec0 [ 30.738551] R13: 00007fff10337940 R14: 00007fff10337970 R15: 00007fff10337cd0 [ 30.739465] [ 30.739773] [ 30.740002] Allocated by task 218: [ 30.740463] kasan_save_stack+0x22/0x50 [ 30.741000] kasan_set_track+0x25/0x30 [ 30.741520] __kasan_slab_alloc+0x59/0x70 [ 30.742078] kmem_cache_alloc+0x16b/0x370 [ 30.742623] vm_area_dup+0x20/0x160 [ 30.743108] __split_vma+0x170/0x950 [ 30.743598] split_vma+0xc6/0x110 [ 30.744073] mprotect_fixup+0x8d2/0xb30 [ 30.744601] do_mprotect_pkey+0x87e/0xd40 [ 30.745147] __x64_sys_mprotect+0x78/0xc0 [ 30.745703] do_syscall_64+0x3f/0x90 [ 30.746206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.746887] [ 30.747117] Freed by task 218: [ 30.747536] kasan_save_stack+0x22/0x50 [ 30.748090] kasan_set_track+0x25/0x30 [ 30.748617] kasan_save_free_info+0x2b/0x50 [ 30.749179] __kasan_slab_free+0x10a/0x190 [ 30.749743] kmem_cache_free+0x10d/0x4d0 [ 30.750276] rcu_core+0x8c8/0x2860 [ 30.750743] __do_softirq+0x1b7/0x7d4 [ 30.751247] [ 30.751475] Last potentially related work creation: [ 30.752099] kasan_save_stack+0x22/0x50 [ 30.752623] __kasan_record_aux_stack+0x8e/0xa0 [ 30.753219] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.753898] remove_vma+0x139/0x170 [ 30.754371] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.754951] do_vmi_munmap+0x1f1/0x2b0 [ 30.755463] __vm_munmap+0x138/0x3a0 [ 30.755957] __x64_sys_munmap+0x59/0x80 [ 30.756498] do_syscall_64+0x3f/0x90 [ 30.757001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757701] [ 30.757946] The buggy address belongs to the object at ffff8880165aa658 [ 30.757946] which belongs to the cache vm_area_struct of size 168 [ 30.759614] The buggy address is located 88 bytes inside of [ 30.759614] freed 168-byte region [ffff8880165aa658, ffff8880165aa700) [ 30.761220] [ 30.761460] The buggy address belongs to the physical page: [ 30.762197] page:0000000045375030 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165aa [ 30.763426] memcg:ffff88800f187001 [ 30.763902] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.764635] page_type: 0xffffffff() [ 30.765142] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.766177] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f187001 [ 30.767161] page dumped because: kasan: bad access detected [ 30.767879] [ 30.768131] Memory state around the buggy address: [ 30.768766] ffff8880165aa580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.769698] ffff8880165aa600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.770627] >ffff8880165aa680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.771556] ^ [ 30.772205] ffff8880165aa700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.773134] ffff8880165aa780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.774055] ================================================================== [ 30.775288] Disabling lock debugging due to kernel taint [ 32.838646] BUG: Bad rss-counter state mm:000000000be07b24 type:MM_FILEPAGES val:33 [ 32.839931] BUG: Bad rss-counter state mm:000000000be07b24 type:MM_ANONPAGES val:22 [ 33.402199] BUG: Bad rss-counter state mm:00000000dd798c82 type:MM_FILEPAGES val:33 [ 33.403371] BUG: Bad rss-counter state mm:00000000dd798c82 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38395' (ECDSA) to the list of known hosts. 2023/06/21 00:46:26 fuzzer started 2023/06/21 00:46:27 dialing manager at localhost:36067 2023/06/21 00:46:27 checking machine... 2023/06/21 00:46:27 checking revisions... [ 34.102884] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:46:27 testing simple program... [ 34.145614] cgroup: Unknown subsys name 'net' [ 34.191248] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:46:26 Registers: info registers vcpu 0 RAX=ffffffff8450cc7f RBX=0000000000000001 RCX=ffffffff863b3c26 RDX=dffffc0000000000 RSI=ffff88801670ff38 RDI=1ffff11002ce1e36 RBP=ffff88801670f1b0 RSP=ffff88801670f0e8 R8 =ffffffff863b3c2a R9 =ffff88801670f198 R10=0000000000038001 R11=000000000008aa85 R12=ffff88801670f1b8 R13=ffff88801670f1a0 R14=ffff88801670ff40 R15=ffff88801670f158 RIP=ffffffff8113106f 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 00007f5a1e481900 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=00007fff5cc05000 CR3=000000000e504000 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=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 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=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ff4b6ff5650 CR3=000000000eb22000 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=2036323a36343a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a36343a3030203132 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000