syzkaller login: [ 31.354081] BUG: Bad rss-counter state mm:00000000094b0696 type:MM_FILEPAGES val:33 [ 31.355111] BUG: Bad rss-counter state mm:00000000094b0696 type:MM_ANONPAGES val:22 [ 31.396513] ================================================================== [ 31.397622] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.398684] Read of size 8 at addr ffff888010009058 by task sshd/220 [ 31.399604] [ 31.399833] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.400814] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.402164] Call Trace: [ 31.402551] [ 31.402891] dump_stack_lvl+0x91/0xf0 [ 31.403479] print_report+0xcc/0x620 [ 31.404072] ? __virt_addr_valid+0x102/0x340 [ 31.404743] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.405485] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.406214] kasan_report+0xbe/0xf0 [ 31.406770] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.407501] vma_interval_tree_remove+0xc75/0xec0 [ 31.408241] vma_prepare+0xc54/0x11a0 [ 31.408733] __split_vma+0x5af/0x950 [ 31.409207] ? __pfx___split_vma+0x10/0x10 [ 31.409739] ? find_held_lock+0x2c/0x110 [ 31.410282] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.410864] ? lock_is_held_type+0x9f/0x120 [ 31.411400] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.412021] ? mtree_range_walk+0x632/0x900 [ 31.412595] ? mas_walk+0x5c7/0x7c0 [ 31.413083] do_vmi_munmap+0x1f1/0x2b0 [ 31.413606] mmap_region+0x1f9/0x2660 [ 31.414106] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.414651] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.415392] ? __pfx_lock_acquire+0x10/0x10 [ 31.415950] ? __pfx_mmap_region+0x10/0x10 [ 31.416482] ? security_mmap_addr+0x7d/0xa0 [ 31.417032] ? get_unmapped_area+0x1f5/0x3f0 [ 31.417603] do_mmap+0x854/0xf00 [ 31.418056] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.418580] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.419133] ksys_mmap_pgoff+0x3af/0x500 [ 31.419647] do_syscall_64+0x3f/0x90 [ 31.420144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.420803] RIP: 0033:0x7fbd31b45d82 [ 31.421277] 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 [ 31.423429] RSP: 002b:00007fffe2e48298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.424359] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd31b45d82 [ 31.425246] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd30f7f000 [ 31.426090] RBP: 00007fbd30f7f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.426944] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b01060ec0 [ 31.427794] R13: 00007fffe2e482b0 R14: 00007fffe2e482e0 R15: 00007fffe2e48640 [ 31.428673] [ 31.428971] [ 31.429189] Allocated by task 213: [ 31.429647] kasan_save_stack+0x22/0x50 [ 31.430161] kasan_set_track+0x25/0x30 [ 31.430682] __kasan_slab_alloc+0x59/0x70 [ 31.431217] kmem_cache_alloc+0x16b/0x370 [ 31.431733] vm_area_dup+0x20/0x160 [ 31.432192] __split_vma+0x170/0x950 [ 31.432663] split_vma+0xc6/0x110 [ 31.433110] mprotect_fixup+0x8d2/0xb30 [ 31.433616] do_mprotect_pkey+0x87e/0xd40 [ 31.434152] __x64_sys_mprotect+0x78/0xc0 [ 31.434687] do_syscall_64+0x3f/0x90 [ 31.435160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.435798] [ 31.436028] Freed by task 213: [ 31.436425] kasan_save_stack+0x22/0x50 [ 31.436930] kasan_set_track+0x25/0x30 [ 31.437434] kasan_save_free_info+0x2b/0x50 [ 31.437978] __kasan_slab_free+0x10a/0x190 [ 31.438526] kmem_cache_free+0x10d/0x4d0 [ 31.439052] rcu_core+0x8c8/0x2860 [ 31.439501] __do_softirq+0x1b7/0x7d4 [ 31.440006] [ 31.440223] Last potentially related work creation: [ 31.440814] kasan_save_stack+0x22/0x50 [ 31.441429] __kasan_record_aux_stack+0x8e/0xa0 [ 31.442011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.442659] remove_vma+0x139/0x170 [ 31.443118] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.443677] do_vmi_munmap+0x1f1/0x2b0 [ 31.444176] __vm_munmap+0x138/0x3a0 [ 31.444646] __x64_sys_munmap+0x59/0x80 [ 31.445141] do_syscall_64+0x3f/0x90 [ 31.445617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.446276] [ 31.446497] The buggy address belongs to the object at ffff888010009000 [ 31.446497] which belongs to the cache vm_area_struct of size 168 [ 31.448011] The buggy address is located 88 bytes inside of [ 31.448011] freed 168-byte region [ffff888010009000, ffff8880100090a8) [ 31.449429] [ 31.449642] The buggy address belongs to the physical page: [ 31.450297] page:000000000afbb502 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10009 [ 31.451380] memcg:ffff88800f072901 [ 31.451813] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.452460] page_type: 0xffffffff() [ 31.452908] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.453833] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f072901 [ 31.454751] page dumped because: kasan: bad access detected [ 31.455434] [ 31.455655] Memory state around the buggy address: [ 31.456235] ffff888010008f00: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.457092] ffff888010008f80: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.457967] >ffff888010009000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.458821] ^ [ 31.459547] ffff888010009080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.460423] ffff888010009100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.461273] ================================================================== [ 31.462201] Disabling lock debugging due to kernel taint [ 33.399572] BUG: Bad rss-counter state mm:00000000f6de229b type:MM_FILEPAGES val:33 [ 33.400867] BUG: Bad rss-counter state mm:00000000f6de229b type:MM_ANONPAGES val:22 [ 33.898941] BUG: Bad rss-counter state mm:00000000c2b0f200 type:MM_FILEPAGES val:33 [ 33.900110] BUG: Bad rss-counter state mm:00000000c2b0f200 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51105' (ECDSA) to the list of known hosts. 2023/06/20 06:06:30 fuzzer started 2023/06/20 06:06:30 dialing manager at localhost:44161 2023/06/20 06:06:30 checking machine... 2023/06/20 06:06:30 checking revisions... [ 34.551150] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:06:30 testing simple program... [ 34.603206] cgroup: Unknown subsys name 'net' [ 34.642815] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:06:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=1ffff1100d9c1354 RSI=ffff88806ce09bc8 RDI=ffff88806ce09aa0 RBP=ffff88806ce09bc8 RSP=ffff88806ce099f0 R8 =ffffffff860d68fa R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88806ce09bd0 R15=ffff88806ce09a98 RIP=ffffffff81130445 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=00007fff6bcd46c8 CR3=0000000016d60000 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=2039323a36303a3630203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a36303a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001b1dfdb RBX=ffff88800d8efea8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d8efed8 RBP=ffff888016708000 RSP=ffff888008e57cb8 R8 =0000000000000001 R9 =ffffed10011caf8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888016701490 R14=ffffffff813782a8 R15=ffff88800d9ebc80 RIP=ffffffff81846362 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 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=00007efe753080b0 CR3=000000000f800000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000