syzkaller login: [ 121.462888] BUG: Bad rss-counter state mm:00000000177ebe6a type:MM_FILEPAGES val:33 [ 121.463593] BUG: Bad rss-counter state mm:00000000177ebe6a type:MM_ANONPAGES val:22 [ 121.608159] ================================================================== [ 121.608819] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 121.609517] Read of size 8 at addr ffff888017e5f798 by task sshd/220 [ 121.610087] [ 121.610236] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 121.611111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 121.611785] Call Trace: [ 121.612000] [ 121.612183] dump_stack_lvl+0x91/0xf0 [ 121.612508] print_report+0xcc/0x620 [ 121.613060] ? __virt_addr_valid+0x102/0x340 [ 121.613410] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.613835] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.614283] kasan_report+0xbe/0xf0 [ 121.614599] ? vma_interval_tree_remove+0xc75/0xec0 [ 121.615010] vma_interval_tree_remove+0xc75/0xec0 [ 121.615394] vma_prepare+0xc54/0x11a0 [ 121.615700] __split_vma+0x5af/0x950 [ 121.616026] ? __pfx___split_vma+0x10/0x10 [ 121.616382] ? find_held_lock+0x2c/0x110 [ 121.616738] do_vmi_align_munmap+0x2ba/0x11f0 [ 121.617131] ? lock_is_held_type+0x9f/0x120 [ 121.617500] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 121.617932] ? mtree_range_walk+0x632/0x900 [ 121.618294] ? mas_walk+0x5c7/0x7c0 [ 121.618610] do_vmi_munmap+0x1f1/0x2b0 [ 121.618944] mmap_region+0x1f9/0x2660 [ 121.619311] ? vm_mmap_pgoff+0x15c/0x3a0 [ 121.619668] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 121.620154] ? __pfx_lock_acquire+0x10/0x10 [ 121.620516] ? __pfx_mmap_region+0x10/0x10 [ 121.620878] ? security_mmap_addr+0x7d/0xa0 [ 121.621266] ? get_unmapped_area+0x1f5/0x3f0 [ 121.621640] do_mmap+0x854/0xf00 [ 121.621985] vm_mmap_pgoff+0x1a6/0x3a0 [ 121.622359] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 121.622739] ksys_mmap_pgoff+0x3af/0x500 [ 121.623083] do_syscall_64+0x3f/0x90 [ 121.623417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.623861] RIP: 0033:0x7fa514a4dd82 [ 121.624184] 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 [ 121.625619] RSP: 002b:00007ffdc3bb3088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 121.626250] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa514a4dd82 [ 121.626798] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa513e87000 [ 121.627356] RBP: 00007fa513e87000 R08: 0000000000000009 R09: 0000000000001000 [ 121.627910] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee89dc2ec0 [ 121.628461] R13: 00007ffdc3bb30a0 R14: 00007ffdc3bb30d0 R15: 00007ffdc3bb3430 [ 121.629036] [ 121.629240] [ 121.629382] Allocated by task 213: [ 121.629658] kasan_save_stack+0x22/0x50 [ 121.630175] kasan_set_track+0x25/0x30 [ 121.630539] __kasan_slab_alloc+0x59/0x70 [ 121.630892] kmem_cache_alloc+0x16b/0x370 [ 121.631252] vm_area_dup+0x20/0x160 [ 121.631577] __split_vma+0x170/0x950 [ 121.631903] split_vma+0xc6/0x110 [ 121.632200] mprotect_fixup+0x8d2/0xb30 [ 121.632552] do_mprotect_pkey+0x87e/0xd40 [ 121.632906] __x64_sys_mprotect+0x78/0xc0 [ 121.633270] do_syscall_64+0x3f/0x90 [ 121.633595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.634073] [ 121.634222] Freed by task 19: [ 121.634486] kasan_save_stack+0x22/0x50 [ 121.634812] kasan_set_track+0x25/0x30 [ 121.635123] kasan_save_free_info+0x2b/0x50 [ 121.635472] __kasan_slab_free+0x10a/0x190 [ 121.635843] kmem_cache_free+0x10d/0x4d0 [ 121.636194] rcu_core+0x8c8/0x2860 [ 121.636493] __do_softirq+0x1b7/0x7d4 [ 121.636829] [ 121.636978] Last potentially related work creation: [ 121.637380] kasan_save_stack+0x22/0x50 [ 121.637707] __kasan_record_aux_stack+0x8e/0xa0 [ 121.638158] __call_rcu_common.constprop.0+0x6a/0xb90 [ 121.638602] remove_vma+0x139/0x170 [ 121.638909] do_vmi_align_munmap+0xd4a/0x11f0 [ 121.639301] do_vmi_munmap+0x1f1/0x2b0 [ 121.639630] __vm_munmap+0x138/0x3a0 [ 121.639948] __x64_sys_munmap+0x59/0x80 [ 121.640284] do_syscall_64+0x3f/0x90 [ 121.640587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 121.641008] [ 121.641166] The buggy address belongs to the object at ffff888017e5f740 [ 121.641166] which belongs to the cache vm_area_struct of size 168 [ 121.642184] The buggy address is located 88 bytes inside of [ 121.642184] freed 168-byte region [ffff888017e5f740, ffff888017e5f7e8) [ 121.643160] [ 121.643310] The buggy address belongs to the physical page: [ 121.643768] page:0000000095fc84d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e5f [ 121.644499] memcg:ffff88800e9f5a01 [ 121.644776] flags: 0x100000000000200(slab|node=0|zone=1) [ 121.645197] page_type: 0xffffffff() [ 121.645493] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 121.646159] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9f5a01 [ 121.646759] page dumped because: kasan: bad access detected [ 121.647232] [ 121.647376] Memory state around the buggy address: [ 121.647773] ffff888017e5f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 121.648336] ffff888017e5f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 121.648901] >ffff888017e5f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 121.649476] ^ [ 121.649837] ffff888017e5f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 121.650434] ffff888017e5f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 121.651009] ================================================================== [ 121.651663] Disabling lock debugging due to kernel taint [ 123.162353] BUG: Bad rss-counter state mm:0000000077954f64 type:MM_FILEPAGES val:33 [ 123.163138] BUG: Bad rss-counter state mm:0000000077954f64 type:MM_ANONPAGES val:22 [ 123.535930] BUG: Bad rss-counter state mm:00000000751ae167 type:MM_FILEPAGES val:33 [ 123.536609] BUG: Bad rss-counter state mm:00000000751ae167 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23798' (ECDSA) to the list of known hosts. 2023/06/20 09:03:45 fuzzer started 2023/06/20 09:03:45 dialing manager at localhost:44161 2023/06/20 09:03:45 checking machine... 2023/06/20 09:03:45 checking revisions... [ 124.167510] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:03:45 testing simple program... [ 124.204158] cgroup: Unknown subsys name 'net' [ 124.251492] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:02:13 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=00007fac83eb4430 CR3=0000000019f7e000 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=2034343a33303a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a33303a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff844a3ccb RDX=ffff888017ee51c0 RSI=0000000000000001 RDI=0000000000000000 RBP=ffff88800d311200 RSP=ffff888014507b18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=dffffc0000000000 R14=ffff88800d311280 R15=ffff888014507e70 RIP=ffffffff814c0328 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 00007f7fac572900 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=00007f7fac551020 CR3=000000000ee7c000 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