syzkaller login: [ 38.681775] BUG: Bad rss-counter state mm:0000000086836dbf type:MM_FILEPAGES val:33 [ 38.682715] BUG: Bad rss-counter state mm:0000000086836dbf type:MM_ANONPAGES val:22 [ 38.849811] ================================================================== [ 38.850925] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.851977] Read of size 8 at addr ffff88800dc7cb38 by task sshd/218 [ 38.852958] [ 38.853166] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.853969] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.854896] Call Trace: [ 38.855200] [ 38.855479] dump_stack_lvl+0x91/0xf0 [ 38.855949] print_report+0xcc/0x620 [ 38.856433] ? __virt_addr_valid+0x102/0x340 [ 38.856962] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.857539] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.858134] kasan_report+0xbe/0xf0 [ 38.858589] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.859201] vma_interval_tree_remove+0xc75/0xec0 [ 38.859797] vma_prepare+0xc54/0x11a0 [ 38.860253] __split_vma+0x5af/0x950 [ 38.860707] ? __pfx___split_vma+0x10/0x10 [ 38.861226] ? find_held_lock+0x2c/0x110 [ 38.861739] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.862285] ? lock_is_held_type+0x9f/0x120 [ 38.862822] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.863429] ? mtree_range_walk+0x632/0x900 [ 38.863966] ? mas_walk+0x5c7/0x7c0 [ 38.864444] do_vmi_munmap+0x1f1/0x2b0 [ 38.864930] mmap_region+0x1f9/0x2660 [ 38.865394] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.865893] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.866577] ? __pfx_lock_acquire+0x10/0x10 [ 38.867085] ? __pfx_mmap_region+0x10/0x10 [ 38.867588] ? security_mmap_addr+0x7d/0xa0 [ 38.868093] ? get_unmapped_area+0x1f5/0x3f0 [ 38.868620] do_mmap+0x854/0xf00 [ 38.869049] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.869527] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.870069] ksys_mmap_pgoff+0x3af/0x500 [ 38.870559] do_syscall_64+0x3f/0x90 [ 38.871019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871634] RIP: 0033:0x7fd70428ed82 [ 38.872070] 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 [ 38.874129] RSP: 002b:00007fff60147d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.874996] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd70428ed82 [ 38.875820] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd7036c8000 [ 38.876647] RBP: 00007fd7036c8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.877460] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b60540b20 [ 38.878294] R13: 00007fff60147d50 R14: 00007fff60147d80 R15: 00007fff601480e0 [ 38.879120] [ 38.879402] [ 38.879606] Allocated by task 211: [ 38.880020] kasan_save_stack+0x22/0x50 [ 38.880509] kasan_set_track+0x25/0x30 [ 38.880997] __kasan_slab_alloc+0x59/0x70 [ 38.881501] kmem_cache_alloc+0x16b/0x370 [ 38.882005] vm_area_dup+0x20/0x160 [ 38.882440] __split_vma+0x170/0x950 [ 38.882899] split_vma+0xc6/0x110 [ 38.883320] mprotect_fixup+0x8d2/0xb30 [ 38.883800] do_mprotect_pkey+0x87e/0xd40 [ 38.884331] __x64_sys_mprotect+0x78/0xc0 [ 38.884834] do_syscall_64+0x3f/0x90 [ 38.885295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.885914] [ 38.886122] Freed by task 211: [ 38.886501] kasan_save_stack+0x22/0x50 [ 38.886982] kasan_set_track+0x25/0x30 [ 38.887464] kasan_save_free_info+0x2b/0x50 [ 38.887976] __kasan_slab_free+0x10a/0x190 [ 38.888500] kmem_cache_free+0x10d/0x4d0 [ 38.888995] rcu_core+0x8c8/0x2860 [ 38.889421] __do_softirq+0x1b7/0x7d4 [ 38.889884] [ 38.890090] Last potentially related work creation: [ 38.890654] kasan_save_stack+0x22/0x50 [ 38.891136] __kasan_record_aux_stack+0x8e/0xa0 [ 38.891685] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.892303] remove_vma+0x139/0x170 [ 38.892753] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.893293] do_vmi_munmap+0x1f1/0x2b0 [ 38.893765] __vm_munmap+0x138/0x3a0 [ 38.894216] __x64_sys_munmap+0x59/0x80 [ 38.894694] do_syscall_64+0x3f/0x90 [ 38.895155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.895769] [ 38.895980] The buggy address belongs to the object at ffff88800dc7cae0 [ 38.895980] which belongs to the cache vm_area_struct of size 168 [ 38.897406] The buggy address is located 88 bytes inside of [ 38.897406] freed 168-byte region [ffff88800dc7cae0, ffff88800dc7cb88) [ 38.898748] [ 38.898958] The buggy address belongs to the physical page: [ 38.899594] page:0000000060aaf084 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc7c [ 38.900668] memcg:ffff88800d9e3801 [ 38.901083] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.901699] page_type: 0xffffffff() [ 38.902143] raw: 0100000000000200 ffff8880087a0c80 ffffea000031b780 dead000000000006 [ 38.903024] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9e3801 [ 38.903889] page dumped because: kasan: bad access detected [ 38.904519] [ 38.904726] Memory state around the buggy address: [ 38.905285] ffff88800dc7ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.906102] ffff88800dc7ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.906914] >ffff88800dc7cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.907726] ^ [ 38.908329] ffff88800dc7cb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.909148] ffff88800dc7cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.909973] ================================================================== [ 38.910946] Disabling lock debugging due to kernel taint [ 40.925663] BUG: Bad rss-counter state mm:00000000c8ff4f8f type:MM_FILEPAGES val:33 [ 40.927052] BUG: Bad rss-counter state mm:00000000c8ff4f8f type:MM_ANONPAGES val:22 [ 41.423773] BUG: Bad rss-counter state mm:00000000f5513f38 type:MM_FILEPAGES val:33 [ 41.424977] BUG: Bad rss-counter state mm:00000000f5513f38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2113' (ECDSA) to the list of known hosts. 2023/06/21 03:15:10 fuzzer started 2023/06/21 03:15:10 dialing manager at localhost:36067 2023/06/21 03:15:11 checking machine... 2023/06/21 03:15:11 checking revisions... [ 42.208570] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:15:11 testing simple program... [ 42.260146] cgroup: Unknown subsys name 'net' [ 42.297970] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:15:10 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f87a135c340 CR3=000000000cb74000 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=498c3a90a0e8a4b5264e7ee070732606 XMM02=2c67c8bc2e329bc3000000000011a560 XMM03=fb795ef6d657705600000000001212d0 XMM04=ef442c564effc47100000000000ae988 XMM05=751b9502027dc0b90000000000130e40 XMM06=bdf2e299e47b49d50000000000130cc8 XMM07=e042d86d42eb936e0000000000121550 XMM08=5e631d2f63255a4c000000000011a5c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84511678 RBP=0000000000000000 RSP=ffff8880167f7f58 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84601a78 RFL=00000006 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9551479900 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=00007f95518153ec CR3=000000001bc54000 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=6720646572637465733a4d41503d706f 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