syzkaller login: [ 40.072730] BUG: Bad rss-counter state mm:000000008d76f63e type:MM_FILEPAGES val:33 [ 40.073475] BUG: Bad rss-counter state mm:000000008d76f63e type:MM_ANONPAGES val:22 [ 40.210574] ================================================================== [ 40.211297] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.212049] Read of size 8 at addr ffff88800fd40a50 by task sshd/219 [ 40.212676] [ 40.212852] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.213577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.214460] Call Trace: [ 40.214737] [ 40.214967] dump_stack_lvl+0x91/0xf0 [ 40.215425] print_report+0xcc/0x620 [ 40.215816] ? __virt_addr_valid+0x102/0x340 [ 40.216281] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.216794] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.217298] kasan_report+0xbe/0xf0 [ 40.217680] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.218180] vma_interval_tree_remove+0xc75/0xec0 [ 40.218693] vma_prepare+0xc54/0x11a0 [ 40.219087] __split_vma+0x5af/0x950 [ 40.219465] ? __pfx___split_vma+0x10/0x10 [ 40.219892] ? find_held_lock+0x2c/0x110 [ 40.220323] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.220788] ? lock_is_held_type+0x9f/0x120 [ 40.221224] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.221716] ? mtree_range_walk+0x632/0x900 [ 40.222154] ? mas_walk+0x5c7/0x7c0 [ 40.222556] do_vmi_munmap+0x1f1/0x2b0 [ 40.222951] mmap_region+0x1f9/0x2660 [ 40.223334] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.223746] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.224346] ? __pfx_lock_acquire+0x10/0x10 [ 40.224774] ? __pfx_mmap_region+0x10/0x10 [ 40.225200] ? security_mmap_addr+0x7d/0xa0 [ 40.225630] ? get_unmapped_area+0x1f5/0x3f0 [ 40.226075] do_mmap+0x854/0xf00 [ 40.226430] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.226863] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.227318] ksys_mmap_pgoff+0x3af/0x500 [ 40.227731] do_syscall_64+0x3f/0x90 [ 40.228113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.228650] RIP: 0033:0x7f082b1c6d82 [ 40.229014] 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 [ 40.230730] RSP: 002b:00007fffb094c368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.231460] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f082b1c6d82 [ 40.232145] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f082a600000 [ 40.232835] RBP: 00007f082a600000 R08: 0000000000000009 R09: 0000000000001000 [ 40.233523] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b52aa70b20 [ 40.234198] R13: 00007fffb094c380 R14: 00007fffb094c3b0 R15: 00007fffb094c710 [ 40.234912] [ 40.235149] [ 40.235322] Allocated by task 212: [ 40.235672] kasan_save_stack+0x22/0x50 [ 40.236079] kasan_set_track+0x25/0x30 [ 40.236504] __kasan_slab_alloc+0x59/0x70 [ 40.236927] kmem_cache_alloc+0x16b/0x370 [ 40.237340] vm_area_dup+0x20/0x160 [ 40.237712] __split_vma+0x170/0x950 [ 40.238091] split_vma+0xc6/0x110 [ 40.238453] mprotect_fixup+0x8d2/0xb30 [ 40.238879] do_mprotect_pkey+0x87e/0xd40 [ 40.239300] __x64_sys_mprotect+0x78/0xc0 [ 40.239721] do_syscall_64+0x3f/0x90 [ 40.240102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.240630] [ 40.240803] Freed by task 212: [ 40.241122] kasan_save_stack+0x22/0x50 [ 40.241528] kasan_set_track+0x25/0x30 [ 40.241923] kasan_save_free_info+0x2b/0x50 [ 40.242354] __kasan_slab_free+0x10a/0x190 [ 40.242805] kmem_cache_free+0x10d/0x4d0 [ 40.243220] rcu_core+0x8c8/0x2860 [ 40.243578] __do_softirq+0x1b7/0x7d4 [ 40.243960] [ 40.244135] Last potentially related work creation: [ 40.244628] kasan_save_stack+0x22/0x50 [ 40.245036] __kasan_record_aux_stack+0x8e/0xa0 [ 40.245498] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.246023] remove_vma+0x139/0x170 [ 40.246383] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.246855] do_vmi_munmap+0x1f1/0x2b0 [ 40.247247] __vm_munmap+0x138/0x3a0 [ 40.247629] __x64_sys_munmap+0x59/0x80 [ 40.248036] do_syscall_64+0x3f/0x90 [ 40.248429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.248943] [ 40.249115] The buggy address belongs to the object at ffff88800fd409f8 [ 40.249115] which belongs to the cache vm_area_struct of size 168 [ 40.250301] The buggy address is located 88 bytes inside of [ 40.250301] freed 168-byte region [ffff88800fd409f8, ffff88800fd40aa0) [ 40.251460] [ 40.251633] The buggy address belongs to the physical page: [ 40.252163] page:00000000b5c4d8ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd40 [ 40.253056] memcg:ffff888008f3bf01 [ 40.253397] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.253920] page_type: 0xffffffff() [ 40.254283] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.255045] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008f3bf01 [ 40.255776] page dumped because: kasan: bad access detected [ 40.256338] [ 40.256510] Memory state around the buggy address: [ 40.256973] ffff88800fd40900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.257663] ffff88800fd40980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 40.258352] >ffff88800fd40a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.259060] ^ [ 40.259633] ffff88800fd40a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 40.260328] ffff88800fd40b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.261014] ================================================================== [ 40.261847] Disabling lock debugging due to kernel taint [ 41.865298] BUG: Bad rss-counter state mm:00000000b199b16d type:MM_FILEPAGES val:33 [ 41.866460] BUG: Bad rss-counter state mm:00000000b199b16d type:MM_ANONPAGES val:22 [ 42.260000] BUG: Bad rss-counter state mm:00000000c83491b4 type:MM_FILEPAGES val:33 [ 42.261085] BUG: Bad rss-counter state mm:00000000c83491b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32509' (ECDSA) to the list of known hosts. 2023/06/20 03:30:53 fuzzer started 2023/06/20 03:30:54 dialing manager at localhost:44161 2023/06/20 03:30:54 checking machine... 2023/06/20 03:30:54 checking revisions... [ 42.961469] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:30:54 testing simple program... [ 43.018545] cgroup: Unknown subsys name 'net' [ 43.066783] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:30:52 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=00007ffd7ae1fd68 CR3=000000000ec94000 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=2033353a30333a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a30333a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff846000aa RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffffffff846000aa RDI=ffff88806cf09b38 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888019eeb680 R15=ffff88800c9317e8 RIP=ffffffff813ad420 RFL=00000286 [--S--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 00007f5b81d48900 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=00007f5b823000b0 CR3=000000000ef86000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000