syzkaller login: [ 39.018080] BUG: Bad rss-counter state mm:00000000d0b9bb1c type:MM_FILEPAGES val:33 [ 39.018690] BUG: Bad rss-counter state mm:00000000d0b9bb1c type:MM_ANONPAGES val:22 [ 39.179644] ================================================================== [ 39.180759] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.181707] Read of size 8 at addr ffff88800fcc4b38 by task sshd/224 [ 39.182636] [ 39.182855] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.183732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.184749] Call Trace: [ 39.185086] [ 39.185369] dump_stack_lvl+0x91/0xf0 [ 39.185868] print_report+0xcc/0x620 [ 39.186372] ? __virt_addr_valid+0x102/0x340 [ 39.186924] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.187560] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.188218] kasan_report+0xbe/0xf0 [ 39.188716] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.189366] vma_interval_tree_remove+0xc75/0xec0 [ 39.189998] vma_prepare+0xc54/0x11a0 [ 39.190501] __split_vma+0x5af/0x950 [ 39.190995] ? __pfx___split_vma+0x10/0x10 [ 39.191546] ? find_held_lock+0x2c/0x110 [ 39.192089] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.192683] ? lock_is_held_type+0x9f/0x120 [ 39.193246] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.193882] ? mtree_range_walk+0x632/0x900 [ 39.194459] ? mas_walk+0x5c7/0x7c0 [ 39.194954] do_vmi_munmap+0x1f1/0x2b0 [ 39.195473] mmap_region+0x1f9/0x2660 [ 39.195979] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.196521] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.197270] ? __pfx_lock_acquire+0x10/0x10 [ 39.197827] ? __pfx_mmap_region+0x10/0x10 [ 39.198386] ? security_mmap_addr+0x7d/0xa0 [ 39.198945] ? get_unmapped_area+0x1f5/0x3f0 [ 39.199527] do_mmap+0x854/0xf00 [ 39.199988] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.200527] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.201119] ksys_mmap_pgoff+0x3af/0x500 [ 39.201653] do_syscall_64+0x3f/0x90 [ 39.202154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.202839] RIP: 0033:0x7f37af6cbd82 [ 39.203315] 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 [ 39.205575] RSP: 002b:00007fffdbdd51f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.206522] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f37af6cbd82 [ 39.207412] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f37aeb05000 [ 39.208319] RBP: 00007f37aeb05000 R08: 0000000000000009 R09: 0000000000001000 [ 39.209210] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1e5109ec0 [ 39.210102] R13: 00007fffdbdd5210 R14: 00007fffdbdd5240 R15: 00007fffdbdd55a0 [ 39.211005] [ 39.211314] [ 39.211535] Allocated by task 217: [ 39.211985] kasan_save_stack+0x22/0x50 [ 39.212520] kasan_set_track+0x25/0x30 [ 39.213033] __kasan_slab_alloc+0x59/0x70 [ 39.213586] kmem_cache_alloc+0x16b/0x370 [ 39.214124] vm_area_dup+0x20/0x160 [ 39.214601] __split_vma+0x170/0x950 [ 39.215087] split_vma+0xc6/0x110 [ 39.215550] mprotect_fixup+0x8d2/0xb30 [ 39.216073] do_mprotect_pkey+0x87e/0xd40 [ 39.216636] __x64_sys_mprotect+0x78/0xc0 [ 39.217182] do_syscall_64+0x3f/0x90 [ 39.217676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.218357] [ 39.218583] Freed by task 203: [ 39.218991] kasan_save_stack+0x22/0x50 [ 39.219525] kasan_set_track+0x25/0x30 [ 39.220037] kasan_save_free_info+0x2b/0x50 [ 39.220608] __kasan_slab_free+0x10a/0x190 [ 39.221174] kmem_cache_free+0x10d/0x4d0 [ 39.221719] rcu_core+0x8c8/0x2860 [ 39.222182] __do_softirq+0x1b7/0x7d4 [ 39.222686] [ 39.222916] Last potentially related work creation: [ 39.223529] kasan_save_stack+0x22/0x50 [ 39.224053] __kasan_record_aux_stack+0x8e/0xa0 [ 39.224676] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.225347] remove_vma+0x139/0x170 [ 39.225824] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.226401] do_vmi_munmap+0x1f1/0x2b0 [ 39.226910] __vm_munmap+0x138/0x3a0 [ 39.227395] __x64_sys_munmap+0x59/0x80 [ 39.227916] do_syscall_64+0x3f/0x90 [ 39.228427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.229105] [ 39.229336] The buggy address belongs to the object at ffff88800fcc4ae0 [ 39.229336] which belongs to the cache vm_area_struct of size 168 [ 39.230888] The buggy address is located 88 bytes inside of [ 39.230888] freed 168-byte region [ffff88800fcc4ae0, ffff88800fcc4b88) [ 39.232386] [ 39.232613] The buggy address belongs to the physical page: [ 39.233310] page:000000001e7f6a01 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcc4 [ 39.234453] memcg:ffff88800de86501 [ 39.234901] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.235584] page_type: 0xffffffff() [ 39.236052] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.237046] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de86501 [ 39.238000] page dumped because: kasan: bad access detected [ 39.238702] [ 39.238926] Memory state around the buggy address: [ 39.239535] ffff88800fcc4a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.240448] ffff88800fcc4a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 39.241365] >ffff88800fcc4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.242287] ^ [ 39.242936] ffff88800fcc4b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.243844] ffff88800fcc4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.244784] ================================================================== [ 39.245900] Disabling lock debugging due to kernel taint [ 41.581283] BUG: Bad rss-counter state mm:00000000bfa1366b type:MM_FILEPAGES val:33 [ 41.582642] BUG: Bad rss-counter state mm:00000000bfa1366b type:MM_ANONPAGES val:22 [ 42.043570] BUG: Bad rss-counter state mm:00000000aaab0ad3 type:MM_FILEPAGES val:33 [ 42.044625] BUG: Bad rss-counter state mm:00000000aaab0ad3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26684' (ECDSA) to the list of known hosts. 2023/06/21 02:28:37 fuzzer started 2023/06/21 02:28:37 dialing manager at localhost:36067 2023/06/21 02:28:37 checking machine... 2023/06/21 02:28:37 checking revisions... [ 42.829427] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:28:38 testing simple program... [ 42.887241] cgroup: Unknown subsys name 'net' [ 42.923286] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:28:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800c9ba540 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ce37958 RBP=ffff88800ce37940 RSP=ffff88801689f918 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000003 R11=0000000000000001 R12=0000000000000046 R13=0000000000000000 R14=0000000000000010 R15=ffff88800ce37940 RIP=ffffffff812d8e6e RFL=00000046 [---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 00007f44fe6e2900 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=00007f44fec97650 CR3=000000000e014000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffc48708cb8 CR3=000000000dc88000 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=2037333a38323a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3333 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3333325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a38323a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000