syzkaller login: [ 146.909107] BUG: Bad rss-counter state mm:000000004ab1db90 type:MM_FILEPAGES val:33 [ 146.910350] BUG: Bad rss-counter state mm:000000004ab1db90 type:MM_ANONPAGES val:22 [ 146.947254] ================================================================== [ 146.948174] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 146.949077] Read of size 8 at addr ffff88800e96adf0 by task sshd/220 [ 146.949907] [ 146.950119] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 146.951071] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 146.951988] Call Trace: [ 146.952292] [ 146.952575] dump_stack_lvl+0x91/0xf0 [ 146.953036] print_report+0xcc/0x620 [ 146.953494] ? __virt_addr_valid+0x102/0x340 [ 146.954010] ? vma_interval_tree_remove+0xc75/0xec0 [ 146.954591] ? vma_interval_tree_remove+0xc75/0xec0 [ 146.955185] kasan_report+0xbe/0xf0 [ 146.955641] ? vma_interval_tree_remove+0xc75/0xec0 [ 146.956235] vma_interval_tree_remove+0xc75/0xec0 [ 146.956839] vma_prepare+0xc54/0x11a0 [ 146.957296] __split_vma+0x5af/0x950 [ 146.957758] ? __pfx___split_vma+0x10/0x10 [ 146.958270] ? find_held_lock+0x2c/0x110 [ 146.958778] do_vmi_align_munmap+0x2ba/0x11f0 [ 146.959325] ? lock_is_held_type+0x9f/0x120 [ 146.959851] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 146.960452] ? mtree_range_walk+0x632/0x900 [ 146.960989] ? mas_walk+0x5c7/0x7c0 [ 146.961453] do_vmi_munmap+0x1f1/0x2b0 [ 146.961936] mmap_region+0x1f9/0x2660 [ 146.962404] ? vm_mmap_pgoff+0x15c/0x3a0 [ 146.962903] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 146.963588] ? __pfx_lock_acquire+0x10/0x10 [ 146.964102] ? __pfx_mmap_region+0x10/0x10 [ 146.964634] ? security_mmap_addr+0x7d/0xa0 [ 146.965154] ? get_unmapped_area+0x1f5/0x3f0 [ 146.965695] do_mmap+0x854/0xf00 [ 146.966123] vm_mmap_pgoff+0x1a6/0x3a0 [ 146.966617] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 146.967147] ksys_mmap_pgoff+0x3af/0x500 [ 146.967634] do_syscall_64+0x3f/0x90 [ 146.968098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 146.968749] RIP: 0033:0x7f30480e5d82 [ 146.969187] 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 [ 146.971248] RSP: 002b:00007ffceb47a0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 146.972130] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f30480e5d82 [ 146.972975] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f304751f000 [ 146.973799] RBP: 00007f304751f000 R08: 0000000000000009 R09: 0000000000001000 [ 146.974630] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3d1521ec0 [ 146.975461] R13: 00007ffceb47a0e0 R14: 00007ffceb47a110 R15: 00007ffceb47a470 [ 146.976283] [ 146.976586] [ 146.976794] Allocated by task 213: [ 146.977216] kasan_save_stack+0x22/0x50 [ 146.977712] kasan_set_track+0x25/0x30 [ 146.978192] __kasan_slab_alloc+0x59/0x70 [ 146.978712] kmem_cache_alloc+0x16b/0x370 [ 146.979217] vm_area_dup+0x20/0x160 [ 146.979659] __split_vma+0x170/0x950 [ 146.980112] split_vma+0xc6/0x110 [ 146.980547] mprotect_fixup+0x8d2/0xb30 [ 146.981041] do_mprotect_pkey+0x87e/0xd40 [ 146.981550] __x64_sys_mprotect+0x78/0xc0 [ 146.982050] do_syscall_64+0x3f/0x90 [ 146.982516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 146.983139] [ 146.983352] Freed by task 213: [ 146.983740] kasan_save_stack+0x22/0x50 [ 146.984215] kasan_set_track+0x25/0x30 [ 146.984699] kasan_save_free_info+0x2b/0x50 [ 146.985204] __kasan_slab_free+0x10a/0x190 [ 146.985712] kmem_cache_free+0x10d/0x4d0 [ 146.986200] rcu_core+0x8c8/0x2860 [ 146.986628] __do_softirq+0x1b7/0x7d4 [ 146.987080] [ 146.987288] Last potentially related work creation: [ 146.987844] kasan_save_stack+0x22/0x50 [ 146.988330] __kasan_record_aux_stack+0x8e/0xa0 [ 146.988879] __call_rcu_common.constprop.0+0x6a/0xb90 [ 146.989488] remove_vma+0x139/0x170 [ 146.989916] do_vmi_align_munmap+0xd4a/0x11f0 [ 146.990454] do_vmi_munmap+0x1f1/0x2b0 [ 146.990912] __vm_munmap+0x138/0x3a0 [ 146.991354] __x64_sys_munmap+0x59/0x80 [ 146.991832] do_syscall_64+0x3f/0x90 [ 146.992280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 146.992923] [ 146.993127] The buggy address belongs to the object at ffff88800e96ad98 [ 146.993127] which belongs to the cache vm_area_struct of size 168 [ 146.994605] The buggy address is located 88 bytes inside of [ 146.994605] freed 168-byte region [ffff88800e96ad98, ffff88800e96ae40) [ 146.996044] [ 146.996261] The buggy address belongs to the physical page: [ 146.996930] page:0000000038ffaf7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe96a [ 146.998000] memcg:ffff88800daeb101 [ 146.998416] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 146.999115] page_type: 0xffffffff() [ 146.999555] raw: 0100000000000200 ffff88800879fc80 ffffea0000237d40 dead000000000005 [ 147.000500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800daeb101 [ 147.001361] page dumped because: kasan: bad access detected [ 147.002024] [ 147.002239] Memory state around the buggy address: [ 147.002825] ffff88800e96ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 147.003681] ffff88800e96ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 147.004550] >ffff88800e96ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 147.005397] ^ [ 147.006215] ffff88800e96ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 147.007059] ffff88800e96ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 147.007935] ================================================================== [ 147.009037] Disabling lock debugging due to kernel taint [ 149.483652] BUG: Bad rss-counter state mm:00000000cc5fae8a type:MM_FILEPAGES val:33 [ 149.485060] BUG: Bad rss-counter state mm:00000000cc5fae8a type:MM_ANONPAGES val:22 [ 150.047411] BUG: Bad rss-counter state mm:00000000a9a1e2e7 type:MM_FILEPAGES val:33 [ 150.048620] BUG: Bad rss-counter state mm:00000000a9a1e2e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40035' (ECDSA) to the list of known hosts. 2023/06/20 01:16:27 fuzzer started 2023/06/20 01:16:27 dialing manager at localhost:44161 2023/06/20 01:16:27 checking machine... 2023/06/20 01:16:27 checking revisions... [ 150.683572] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:16:27 testing simple program... [ 150.744990] cgroup: Unknown subsys name 'net' [ 150.785924] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:14:35 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=ffff888008c58000 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=00007f8254784000 CR3=00000000166a2000 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=2036323a36313a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a36313a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff86048e58 RCX=ffffffff844c0a79 RDX=0000000000000000 RSI=ffffffff864a9b92 RDI=ffffffff86048e58 RBP=ffffffff86048e58 RSP=ffff88800c65ee60 R8 =ffffffff864a9b92 R9 =ffff88800c65ef58 R10=0000000000038001 R11=00000000000b3ea1 R12=ffffffff86048e58 R13=ffffffff86048e58 R14=ffffffff86048e58 R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000206 [-----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 00007f8be428a900 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=00007f8be4254008 CR3=000000000e2c4000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000