[ 31.716141] BUG: Bad rss-counter state mm:000000002f18ac01 type:MM_FILEPAGES val:33 [ 31.717553] BUG: Bad rss-counter state mm:000000002f18ac01 type:MM_ANONPAGES val:22 [ 31.872153] ================================================================== [ 31.873053] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.874005] Read of size 8 at addr ffff88800c770a50 by task sshd/218 [ 31.874845] [ 31.875060] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.875907] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.876891] Call Trace: [ 31.877209] [ 31.877490] dump_stack_lvl+0x91/0xf0 [ 31.877986] print_report+0xcc/0x620 [ 31.878463] ? __virt_addr_valid+0x102/0x340 [ 31.879011] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.879618] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.880225] kasan_report+0xbe/0xf0 [ 31.880696] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.881308] vma_interval_tree_remove+0xc75/0xec0 [ 31.881904] vma_prepare+0xc54/0x11a0 [ 31.882405] __split_vma+0x5af/0x950 [ 31.882878] ? __pfx___split_vma+0x10/0x10 [ 31.883400] ? find_held_lock+0x2c/0x110 [ 31.883914] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.884468] ? lock_is_held_type+0x9f/0x120 [ 31.885005] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.885606] ? mtree_range_walk+0x632/0x900 [ 31.886163] ? mas_walk+0x5c7/0x7c0 [ 31.886638] do_vmi_munmap+0x1f1/0x2b0 [ 31.887126] mmap_region+0x1f9/0x2660 [ 31.887600] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.888110] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.888815] ? __pfx_lock_acquire+0x10/0x10 [ 31.889344] ? __pfx_mmap_region+0x10/0x10 [ 31.889865] ? security_mmap_addr+0x7d/0xa0 [ 31.890409] ? get_unmapped_area+0x1f5/0x3f0 [ 31.890954] do_mmap+0x854/0xf00 [ 31.891392] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.891882] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.892434] ksys_mmap_pgoff+0x3af/0x500 [ 31.892935] do_syscall_64+0x3f/0x90 [ 31.893410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.894056] RIP: 0033:0x7f9d6e2bed82 [ 31.894509] 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 [ 31.896604] RSP: 002b:00007ffcd99b8fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.897499] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d6e2bed82 [ 31.898352] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d6d6f8000 [ 31.899185] RBP: 00007f9d6d6f8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.900022] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562985c9fec0 [ 31.900861] R13: 00007ffcd99b8ff0 R14: 00007ffcd99b9020 R15: 00007ffcd99b9380 [ 31.901705] [ 31.902015] [ 31.902228] Allocated by task 211: [ 31.902651] kasan_save_stack+0x22/0x50 [ 31.903154] kasan_set_track+0x25/0x30 [ 31.903643] __kasan_slab_alloc+0x59/0x70 [ 31.904158] kmem_cache_alloc+0x16b/0x370 [ 31.904666] vm_area_dup+0x20/0x160 [ 31.905116] __split_vma+0x170/0x950 [ 31.905572] split_vma+0xc6/0x110 [ 31.906014] mprotect_fixup+0x8d2/0xb30 [ 31.906513] do_mprotect_pkey+0x87e/0xd40 [ 31.907027] __x64_sys_mprotect+0x78/0xc0 [ 31.907539] do_syscall_64+0x3f/0x90 [ 31.908010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.908640] [ 31.908853] Freed by task 202: [ 31.909238] kasan_save_stack+0x22/0x50 [ 31.909730] kasan_set_track+0x25/0x30 [ 31.910250] kasan_save_free_info+0x2b/0x50 [ 31.910790] __kasan_slab_free+0x10a/0x190 [ 31.911319] kmem_cache_free+0x10d/0x4d0 [ 31.911822] rcu_core+0x8c8/0x2860 [ 31.912271] __do_softirq+0x1b7/0x7d4 [ 31.912754] [ 31.912967] Last potentially related work creation: [ 31.913553] kasan_save_stack+0x22/0x50 [ 31.914056] __kasan_record_aux_stack+0x8e/0xa0 [ 31.914622] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.915266] remove_vma+0x139/0x170 [ 31.915719] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.916292] do_vmi_munmap+0x1f1/0x2b0 [ 31.916799] __vm_munmap+0x138/0x3a0 [ 31.917286] __x64_sys_munmap+0x59/0x80 [ 31.917802] do_syscall_64+0x3f/0x90 [ 31.918315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.918985] [ 31.919210] The buggy address belongs to the object at ffff88800c7709f8 [ 31.919210] which belongs to the cache vm_area_struct of size 168 [ 31.920744] The buggy address is located 88 bytes inside of [ 31.920744] freed 168-byte region [ffff88800c7709f8, ffff88800c770aa0) [ 31.922218] [ 31.922443] The buggy address belongs to the physical page: [ 31.923126] page:00000000cd09d41b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc770 [ 31.924255] memcg:ffff88800f5af401 [ 31.924701] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.925419] page_type: 0xffffffff() [ 31.925886] raw: 0100000000000200 ffff8880087a0c80 ffffea000039b100 dead000000000007 [ 31.926864] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5af401 [ 31.927824] page dumped because: kasan: bad access detected [ 31.928517] [ 31.928739] Memory state around the buggy address: [ 31.929346] ffff88800c770900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.930241] ffff88800c770980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.931130] >ffff88800c770a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.932019] ^ [ 31.932758] ffff88800c770a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.933656] ffff88800c770b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.934560] ================================================================== [ 31.935875] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.730523] BUG: Bad rss-counter state mm:00000000a93997c2 type:MM_FILEPAGES val:33 [ 34.731677] BUG: Bad rss-counter state mm:00000000a93997c2 type:MM_ANONPAGES val:22 [ 35.112780] BUG: Bad rss-counter state mm:00000000123df4e1 type:MM_FILEPAGES val:33 [ 35.113846] BUG: Bad rss-counter state mm:00000000123df4e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55119' (ECDSA) to the list of known hosts. 2023/06/20 15:44:30 fuzzer started 2023/06/20 15:44:31 dialing manager at localhost:36067 2023/06/20 15:44:31 checking machine... 2023/06/20 15:44:31 checking revisions... [ 35.880043] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:44:31 testing simple program... [ 35.929347] cgroup: Unknown subsys name 'net' [ 35.965053] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:44:30 Registers: info registers vcpu 0 RAX=ffffffff8608a557 RBX=0000000000000001 RCX=ffffffff8608a556 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8608a55a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88801465f360 R15=ffff88806ce09a98 RIP=ffffffff81131767 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 00007f6d4112d900 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=00007f73153b1650 CR3=000000000f394000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a9aab9e779c786bd00000000000ae988 XMM05=9aa6afb66d9965d90000000000132be0 XMM06=bdf2e299e47b49d50000000000131660 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8148316f RDX=ffff888016a30000 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff888014777cb8 R8 =0000000000000005 R9 =0000000000000005 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffffffff854ee9e0 R15=0000000000000001 RIP=ffffffff814c027c 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 00007f7314dfc900 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=00007f73153b40b0 CR3=000000001455c000 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