syzkaller login: [ 31.041947] BUG: Bad rss-counter state mm:0000000027cd9a57 type:MM_FILEPAGES val:33 [ 31.043136] BUG: Bad rss-counter state mm:0000000027cd9a57 type:MM_ANONPAGES val:22 [ 31.080904] ================================================================== [ 31.081936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.082905] Read of size 8 at addr ffff888016a84798 by task sshd/221 [ 31.083804] [ 31.084030] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.084903] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.085935] Call Trace: [ 31.086261] [ 31.086550] dump_stack_lvl+0x91/0xf0 [ 31.087046] print_report+0xcc/0x620 [ 31.087547] ? __virt_addr_valid+0x102/0x340 [ 31.088107] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.088734] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.089363] kasan_report+0xbe/0xf0 [ 31.089840] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.090457] vma_interval_tree_remove+0xc75/0xec0 [ 31.091064] vma_prepare+0xc54/0x11a0 [ 31.091560] __split_vma+0x5af/0x950 [ 31.092042] ? __pfx___split_vma+0x10/0x10 [ 31.092595] ? find_held_lock+0x2c/0x110 [ 31.093126] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.093702] ? lock_is_held_type+0x9f/0x120 [ 31.094241] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.094864] ? mtree_range_walk+0x632/0x900 [ 31.095422] ? mas_walk+0x5c7/0x7c0 [ 31.095917] do_vmi_munmap+0x1f1/0x2b0 [ 31.096410] mmap_region+0x1f9/0x2660 [ 31.096893] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.097425] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.098140] ? __pfx_lock_acquire+0x10/0x10 [ 31.098677] ? __pfx_mmap_region+0x10/0x10 [ 31.099211] ? security_mmap_addr+0x7d/0xa0 [ 31.099765] ? get_unmapped_area+0x1f5/0x3f0 [ 31.100310] do_mmap+0x854/0xf00 [ 31.100747] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.101241] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.101801] ksys_mmap_pgoff+0x3af/0x500 [ 31.102318] do_syscall_64+0x3f/0x90 [ 31.102798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.103450] RIP: 0033:0x7fc673547d82 [ 31.103918] 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 [ 31.106031] RSP: 002b:00007ffe07d8cfb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.106943] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc673547d82 [ 31.107803] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc672981000 [ 31.108656] RBP: 00007fc672981000 R08: 0000000000000009 R09: 0000000000001000 [ 31.109490] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f08a02ec0 [ 31.110338] R13: 00007ffe07d8cfd0 R14: 00007ffe07d8d000 R15: 00007ffe07d8d360 [ 31.111185] [ 31.111482] [ 31.111701] Allocated by task 214: [ 31.112130] kasan_save_stack+0x22/0x50 [ 31.112629] kasan_set_track+0x25/0x30 [ 31.113121] __kasan_slab_alloc+0x59/0x70 [ 31.113641] kmem_cache_alloc+0x16b/0x370 [ 31.114158] vm_area_dup+0x20/0x160 [ 31.114609] __split_vma+0x170/0x950 [ 31.115070] split_vma+0xc6/0x110 [ 31.115513] mprotect_fixup+0x8d2/0xb30 [ 31.116013] do_mprotect_pkey+0x87e/0xd40 [ 31.116524] __x64_sys_mprotect+0x78/0xc0 [ 31.117039] do_syscall_64+0x3f/0x90 [ 31.117520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.118158] [ 31.118371] Freed by task 214: [ 31.118757] kasan_save_stack+0x22/0x50 [ 31.119256] kasan_set_track+0x25/0x30 [ 31.119781] kasan_save_free_info+0x2b/0x50 [ 31.120393] __kasan_slab_free+0x10a/0x190 [ 31.121006] kmem_cache_free+0x10d/0x4d0 [ 31.121591] rcu_core+0x8c8/0x2860 [ 31.122103] __do_softirq+0x1b7/0x7d4 [ 31.122657] [ 31.122904] Last potentially related work creation: [ 31.123583] kasan_save_stack+0x22/0x50 [ 31.124158] __kasan_record_aux_stack+0x8e/0xa0 [ 31.124817] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.125561] remove_vma+0x139/0x170 [ 31.126085] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.126730] do_vmi_munmap+0x1f1/0x2b0 [ 31.127295] __vm_munmap+0x138/0x3a0 [ 31.127838] __x64_sys_munmap+0x59/0x80 [ 31.128410] do_syscall_64+0x3f/0x90 [ 31.128957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.129697] [ 31.129946] The buggy address belongs to the object at ffff888016a84740 [ 31.129946] which belongs to the cache vm_area_struct of size 168 [ 31.131656] The buggy address is located 88 bytes inside of [ 31.131656] freed 168-byte region [ffff888016a84740, ffff888016a847e8) [ 31.133246] [ 31.133493] The buggy address belongs to the physical page: [ 31.134249] page:0000000084231c66 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a84 [ 31.135509] memcg:ffff8880102d1401 [ 31.135999] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.136733] page_type: 0xffffffff() [ 31.137249] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.138301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880102d1401 [ 31.139341] page dumped because: kasan: bad access detected [ 31.140111] [ 31.140355] Memory state around the buggy address: [ 31.141021] ffff888016a84680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.141991] ffff888016a84700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.142970] >ffff888016a84780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.143941] ^ [ 31.144501] ffff888016a84800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.145468] ffff888016a84880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.146426] ================================================================== [ 31.147590] Disabling lock debugging due to kernel taint [ 33.560915] BUG: Bad rss-counter state mm:000000004445440e type:MM_FILEPAGES val:33 [ 33.561661] BUG: Bad rss-counter state mm:000000004445440e type:MM_ANONPAGES val:22 [ 33.972462] BUG: Bad rss-counter state mm:000000008f2c3528 type:MM_FILEPAGES val:33 [ 33.973303] BUG: Bad rss-counter state mm:000000008f2c3528 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45324' (ECDSA) to the list of known hosts. 2023/06/20 16:57:55 fuzzer started 2023/06/20 16:57:55 dialing manager at localhost:36067 2023/06/20 16:57:55 checking machine... 2023/06/20 16:57:55 checking revisions... [ 34.723691] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:57:55 testing simple program... [ 34.779886] cgroup: Unknown subsys name 'net' [ 34.831826] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:57:55 Registers: info registers vcpu 0 RAX=ffffffff81206541 RBX=ffffffff85da19a0 RCX=ffffffff8120686e RDX=0000000000000000 RSI=ffffffff860ae4d2 RDI=ffffffff85da19a0 RBP=ffffffff85da19a4 RSP=ffff888008d9f870 R8 =ffffffff860ae4d2 R9 =ffff888008d9f968 R10=0000000000038001 R11=0000000000009bf7 R12=ffffffff85da19a0 R13=ffffffff85da19a0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 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=00007f26e40f2880 CR3=0000000019616000 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=2035353a37353a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a37353a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f660be12163 RCX=0000000000000000 RDX=ffff888014713680 RSI=00007f660be12163 RDI=ffffffff85652b60 RBP=00007f660be12163 RSP=ffff88800d60f310 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800d60f438 R13=0000000000000000 R14=ffff888014713680 R15=0000000000002000 RIP=ffffffff814c845a 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 00007f660b91f900 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=00007ffd80f09000 CR3=000000000d94e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000