syzkaller login: [ 38.469328] BUG: Bad rss-counter state mm:0000000033df6853 type:MM_FILEPAGES val:33 [ 38.470851] BUG: Bad rss-counter state mm:0000000033df6853 type:MM_ANONPAGES val:22 [ 38.595760] ================================================================== [ 38.596403] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.597065] Read of size 8 at addr ffff88800ed39058 by task sshd/220 [ 38.597559] [ 38.597703] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.598315] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.598976] Call Trace: [ 38.599187] [ 38.599382] dump_stack_lvl+0x91/0xf0 [ 38.599739] print_report+0xcc/0x620 [ 38.600171] ? __virt_addr_valid+0x102/0x340 [ 38.600630] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.601038] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.601460] kasan_report+0xbe/0xf0 [ 38.601780] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.602228] vma_interval_tree_remove+0xc75/0xec0 [ 38.602641] vma_prepare+0xc54/0x11a0 [ 38.602954] __split_vma+0x5af/0x950 [ 38.603279] ? __pfx___split_vma+0x10/0x10 [ 38.603643] ? find_held_lock+0x2c/0x110 [ 38.604013] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.604401] ? lock_is_held_type+0x9f/0x120 [ 38.604766] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.605176] ? mtree_range_walk+0x632/0x900 [ 38.605551] ? mas_walk+0x5c7/0x7c0 [ 38.605869] do_vmi_munmap+0x1f1/0x2b0 [ 38.606231] mmap_region+0x1f9/0x2660 [ 38.606560] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.606909] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.607399] ? __pfx_lock_acquire+0x10/0x10 [ 38.607769] ? __pfx_mmap_region+0x10/0x10 [ 38.608141] ? security_mmap_addr+0x7d/0xa0 [ 38.608511] ? get_unmapped_area+0x1f5/0x3f0 [ 38.608891] do_mmap+0x854/0xf00 [ 38.609198] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.609545] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.609932] ksys_mmap_pgoff+0x3af/0x500 [ 38.610319] do_syscall_64+0x3f/0x90 [ 38.610658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.611102] RIP: 0033:0x7fe9c216ad82 [ 38.611417] 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 [ 38.612835] RSP: 002b:00007ffccb2b77d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.613433] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe9c216ad82 [ 38.613999] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9c15a4000 [ 38.614589] RBP: 00007fe9c15a4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.615149] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d95f31980 [ 38.615712] R13: 00007ffccb2b77f0 R14: 00007ffccb2b7820 R15: 00007ffccb2b7b80 [ 38.616278] [ 38.616477] [ 38.616630] Allocated by task 213: [ 38.616910] kasan_save_stack+0x22/0x50 [ 38.617255] kasan_set_track+0x25/0x30 [ 38.617588] __kasan_slab_alloc+0x59/0x70 [ 38.617941] kmem_cache_alloc+0x16b/0x370 [ 38.618330] vm_area_dup+0x20/0x160 [ 38.618628] __split_vma+0x170/0x950 [ 38.618939] split_vma+0xc6/0x110 [ 38.619240] mprotect_fixup+0x8d2/0xb30 [ 38.619581] do_mprotect_pkey+0x87e/0xd40 [ 38.619936] __x64_sys_mprotect+0x78/0xc0 [ 38.620292] do_syscall_64+0x3f/0x90 [ 38.620616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.621065] [ 38.621219] Freed by task 13: [ 38.621483] kasan_save_stack+0x22/0x50 [ 38.621822] kasan_set_track+0x25/0x30 [ 38.622177] kasan_save_free_info+0x2b/0x50 [ 38.622530] __kasan_slab_free+0x10a/0x190 [ 38.622891] kmem_cache_free+0x10d/0x4d0 [ 38.623233] rcu_core+0x8c8/0x2860 [ 38.623537] __do_softirq+0x1b7/0x7d4 [ 38.623855] [ 38.624001] Last potentially related work creation: [ 38.624390] kasan_save_stack+0x22/0x50 [ 38.624721] __kasan_record_aux_stack+0x8e/0xa0 [ 38.625111] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.625544] remove_vma+0x139/0x170 [ 38.625851] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.626263] do_vmi_munmap+0x1f1/0x2b0 [ 38.626594] __vm_munmap+0x138/0x3a0 [ 38.626910] __x64_sys_munmap+0x59/0x80 [ 38.627248] do_syscall_64+0x3f/0x90 [ 38.627572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.628008] [ 38.628155] The buggy address belongs to the object at ffff88800ed39000 [ 38.628155] which belongs to the cache vm_area_struct of size 168 [ 38.629123] The buggy address is located 88 bytes inside of [ 38.629123] freed 168-byte region [ffff88800ed39000, ffff88800ed390a8) [ 38.630068] [ 38.630219] The buggy address belongs to the physical page: [ 38.630646] page:00000000d1d71eb2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed39 [ 38.631387] memcg:ffff8880144aac01 [ 38.631670] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.632110] page_type: 0xffffffff() [ 38.632422] raw: 0100000000000200 ffff8880087a0c80 ffffea0000392700 dead000000000004 [ 38.633045] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144aac01 [ 38.633638] page dumped because: kasan: bad access detected [ 38.634104] [ 38.634269] Memory state around the buggy address: [ 38.634650] ffff88800ed38f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.635219] ffff88800ed38f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.635790] >ffff88800ed39000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.636367] ^ [ 38.636849] ffff88800ed39080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.637426] ffff88800ed39100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.637996] ================================================================== [ 38.638671] Disabling lock debugging due to kernel taint [ 40.701239] BUG: Bad rss-counter state mm:000000008d459604 type:MM_FILEPAGES val:33 [ 40.702038] BUG: Bad rss-counter state mm:000000008d459604 type:MM_ANONPAGES val:22 [ 41.064196] BUG: Bad rss-counter state mm:000000006b44932a type:MM_FILEPAGES val:33 [ 41.064982] BUG: Bad rss-counter state mm:000000006b44932a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39493' (ECDSA) to the list of known hosts. 2023/06/21 09:31:35 fuzzer started 2023/06/21 09:31:35 dialing manager at localhost:36067 2023/06/21 09:31:35 checking machine... 2023/06/21 09:31:35 checking revisions... [ 41.620782] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:31:36 testing simple program... [ 41.657723] cgroup: Unknown subsys name 'net' [ 41.697953] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:31:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09a98 RCX=ffffffff864bd87c RDX=1ffff1100d9c1353 RSI=ffffffff85407f20 RDI=ffff88806ce09a98 RBP=ffffffff85407f20 RSP=ffff88806ce099f0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffffffff85407f20 R15=ffff88806ce09a98 RIP=ffffffff8113041a 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 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=0000558d01b46218 CR3=000000000fe72000 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=2035333a31333a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a31333a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800f13f878 RCX=0000000000000001 RDX=ffff88800f13f890 RSI=ffff88800f13f878 RDI=ffff88800f13f7f0 RBP=ffff88800f138000 RSP=ffff88800f13f760 R8 =0000000000000001 R9 =ffff88800f13f820 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800f13f840 R13=ffff88800f13f828 R14=ffff88800f13f878 R15=ffff88800f13f7e0 RIP=ffffffff81130930 RFL=00000282 [--S----] 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 00007f673d880900 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=00007f673de35650 CR3=000000000c94c000 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=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