syzkaller login: [ 31.442919] BUG: Bad rss-counter state mm:00000000ab19b880 type:MM_FILEPAGES val:33 [ 31.444391] BUG: Bad rss-counter state mm:00000000ab19b880 type:MM_ANONPAGES val:22 [ 31.617311] ================================================================== [ 31.618415] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.619552] Read of size 8 at addr ffff8880164455c8 by task sshd/220 [ 31.620596] [ 31.620860] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.621912] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.623110] Call Trace: [ 31.623502] [ 31.623843] dump_stack_lvl+0x91/0xf0 [ 31.624418] print_report+0xcc/0x620 [ 31.624906] ? __virt_addr_valid+0x102/0x340 [ 31.625457] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.626070] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.626686] kasan_report+0xbe/0xf0 [ 31.627158] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.627788] vma_interval_tree_remove+0xc75/0xec0 [ 31.628409] vma_prepare+0xc54/0x11a0 [ 31.628887] __split_vma+0x5af/0x950 [ 31.629359] ? __pfx___split_vma+0x10/0x10 [ 31.629885] ? find_held_lock+0x2c/0x110 [ 31.630411] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.630981] ? lock_is_held_type+0x9f/0x120 [ 31.631513] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.632177] ? mtree_range_walk+0x632/0x900 [ 31.632744] ? mas_walk+0x5c7/0x7c0 [ 31.633228] do_vmi_munmap+0x1f1/0x2b0 [ 31.633729] mmap_region+0x1f9/0x2660 [ 31.634220] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.634733] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.635465] ? __pfx_lock_acquire+0x10/0x10 [ 31.636047] ? __pfx_mmap_region+0x10/0x10 [ 31.636586] ? security_mmap_addr+0x7d/0xa0 [ 31.637129] ? get_unmapped_area+0x1f5/0x3f0 [ 31.637685] do_mmap+0x854/0xf00 [ 31.638126] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.638630] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.639201] ksys_mmap_pgoff+0x3af/0x500 [ 31.639719] do_syscall_64+0x3f/0x90 [ 31.640221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.640880] RIP: 0033:0x7f75065b6d82 [ 31.641349] 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 [ 31.643549] RSP: 002b:00007ffe73172448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.644481] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75065b6d82 [ 31.645353] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75059f0000 [ 31.646198] RBP: 00007f75059f0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.647039] R10: 0000000000000812 R11: 0000000000000206 R12: 000056463d17bec0 [ 31.647882] R13: 00007ffe73172460 R14: 00007ffe73172490 R15: 00007ffe731727f0 [ 31.648760] [ 31.649051] [ 31.649273] Allocated by task 213: [ 31.649705] kasan_save_stack+0x22/0x50 [ 31.650218] kasan_set_track+0x25/0x30 [ 31.650711] __kasan_slab_alloc+0x59/0x70 [ 31.651252] kmem_cache_alloc+0x16b/0x370 [ 31.651787] vm_area_dup+0x20/0x160 [ 31.652246] __split_vma+0x170/0x950 [ 31.652714] split_vma+0xc6/0x110 [ 31.653152] mprotect_fixup+0x8d2/0xb30 [ 31.653667] do_mprotect_pkey+0x87e/0xd40 [ 31.654207] __x64_sys_mprotect+0x78/0xc0 [ 31.654736] do_syscall_64+0x3f/0x90 [ 31.655220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.655873] [ 31.656117] Freed by task 213: [ 31.656524] kasan_save_stack+0x22/0x50 [ 31.657028] kasan_set_track+0x25/0x30 [ 31.657533] kasan_save_free_info+0x2b/0x50 [ 31.658067] __kasan_slab_free+0x10a/0x190 [ 31.658610] kmem_cache_free+0x10d/0x4d0 [ 31.659121] rcu_core+0x8c8/0x2860 [ 31.659573] __do_softirq+0x1b7/0x7d4 [ 31.660077] [ 31.660296] Last potentially related work creation: [ 31.660891] kasan_save_stack+0x22/0x50 [ 31.661397] __kasan_record_aux_stack+0x8e/0xa0 [ 31.661974] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.662624] remove_vma+0x139/0x170 [ 31.663081] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.663640] do_vmi_munmap+0x1f1/0x2b0 [ 31.664145] __vm_munmap+0x138/0x3a0 [ 31.664616] __x64_sys_munmap+0x59/0x80 [ 31.665120] do_syscall_64+0x3f/0x90 [ 31.665594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.666238] [ 31.666456] Second to last potentially related work creation: [ 31.667141] kasan_save_stack+0x22/0x50 [ 31.667658] __kasan_record_aux_stack+0x8e/0xa0 [ 31.668254] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.668893] remove_vma+0x139/0x170 [ 31.669346] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.669908] do_vmi_munmap+0x1f1/0x2b0 [ 31.670398] mmap_region+0x1f9/0x2660 [ 31.670874] do_mmap+0x854/0xf00 [ 31.671306] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.671793] ksys_mmap_pgoff+0x3af/0x500 [ 31.672307] do_syscall_64+0x3f/0x90 [ 31.672782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.673435] [ 31.673652] The buggy address belongs to the object at ffff888016445570 [ 31.673652] which belongs to the cache vm_area_struct of size 168 [ 31.675111] The buggy address is located 88 bytes inside of [ 31.675111] freed 168-byte region [ffff888016445570, ffff888016445618) [ 31.676542] [ 31.676756] The buggy address belongs to the physical page: [ 31.677416] page:00000000ab324e28 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16445 [ 31.678511] memcg:ffff888016b06501 [ 31.678938] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.679638] page_type: 0xffffffff() [ 31.680100] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.681020] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b06501 [ 31.681922] page dumped because: kasan: bad access detected [ 31.682595] [ 31.682813] Memory state around the buggy address: [ 31.683401] ffff888016445480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.684323] ffff888016445500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.685214] >ffff888016445580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.686062] ^ [ 31.686722] ffff888016445600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.687577] ffff888016445680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.688431] ================================================================== [ 31.689463] Disabling lock debugging due to kernel taint [ 33.707686] BUG: Bad rss-counter state mm:00000000a9003f07 type:MM_FILEPAGES val:31 [ 33.708818] BUG: Bad rss-counter state mm:00000000a9003f07 type:MM_ANONPAGES val:22 [ 34.169356] BUG: Bad rss-counter state mm:000000008e90b38d type:MM_FILEPAGES val:33 [ 34.170098] BUG: Bad rss-counter state mm:000000008e90b38d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25401' (ECDSA) to the list of known hosts. 2023/06/19 21:29:48 fuzzer started 2023/06/19 21:29:48 dialing manager at localhost:44161 2023/06/19 21:29:48 checking machine... 2023/06/19 21:29:48 checking revisions... [ 34.918961] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:29:48 testing simple program... [ 34.972667] cgroup: Unknown subsys name 'net' [ 35.016893] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:29:47 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8153425b RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff81371069 RSP=ffff88806ce09dc8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00000000000000a4 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff81534263 RFL=00000047 [---Z-PC] 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 00007efd3f104900 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=00007efd3f6bc0b0 CR3=0000000017e3e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffd64580768 CR3=00000000146ee000 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=2038343a39323a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a39323a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000