[ 23.945440] BUG: Bad rss-counter state mm:00000000c0f9503a type:MM_FILEPAGES val:33 [ 23.946750] BUG: Bad rss-counter state mm:00000000c0f9503a type:MM_ANONPAGES val:22 [ 24.108700] ================================================================== [ 24.109557] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.110452] Read of size 8 at addr ffff88800ea786b0 by task sshd/219 [ 24.111171] [ 24.111376] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.112326] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.113243] Call Trace: [ 24.113544] [ 24.113813] dump_stack_lvl+0x91/0xf0 [ 24.114329] print_report+0xcc/0x620 [ 24.114806] ? __virt_addr_valid+0x102/0x340 [ 24.115328] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.115914] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.116504] kasan_report+0xbe/0xf0 [ 24.116954] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.117537] vma_interval_tree_remove+0xc75/0xec0 [ 24.118102] vma_prepare+0xc54/0x11a0 [ 24.118592] __split_vma+0x5af/0x950 [ 24.119062] ? __pfx___split_vma+0x10/0x10 [ 24.119587] ? find_held_lock+0x2c/0x110 [ 24.120102] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.120676] ? lock_is_held_type+0x9f/0x120 [ 24.121224] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.121840] ? mtree_range_walk+0x632/0x900 [ 24.122411] ? mas_walk+0x5c7/0x7c0 [ 24.122892] do_vmi_munmap+0x1f1/0x2b0 [ 24.123397] mmap_region+0x1f9/0x2660 [ 24.123876] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.124384] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.125103] ? __pfx_lock_acquire+0x10/0x10 [ 24.125643] ? __pfx_mmap_region+0x10/0x10 [ 24.126189] ? security_mmap_addr+0x7d/0xa0 [ 24.126735] ? get_unmapped_area+0x1f5/0x3f0 [ 24.127297] do_mmap+0x854/0xf00 [ 24.127730] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.128220] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.128785] ksys_mmap_pgoff+0x3af/0x500 [ 24.129302] do_syscall_64+0x3f/0x90 [ 24.129781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.130446] RIP: 0033:0x7f2ab1495d82 [ 24.130906] 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 [ 24.133060] RSP: 002b:00007ffdde1e15f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.133961] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ab1495d82 [ 24.134813] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ab08cf000 [ 24.135667] RBP: 00007f2ab08cf000 R08: 0000000000000009 R09: 0000000000001000 [ 24.136525] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a5efa78ec0 [ 24.137384] R13: 00007ffdde1e1610 R14: 00007ffdde1e1640 R15: 00007ffdde1e19a0 [ 24.138251] [ 24.138555] [ 24.138770] Allocated by task 212: [ 24.139201] kasan_save_stack+0x22/0x50 [ 24.139701] kasan_set_track+0x25/0x30 [ 24.140193] __kasan_slab_alloc+0x59/0x70 [ 24.140722] kmem_cache_alloc+0x16b/0x370 [ 24.141240] vm_area_dup+0x20/0x160 [ 24.141694] __split_vma+0x170/0x950 [ 24.142152] split_vma+0xc6/0x110 [ 24.142615] mprotect_fixup+0x8d2/0xb30 [ 24.143112] do_mprotect_pkey+0x87e/0xd40 [ 24.143633] __x64_sys_mprotect+0x78/0xc0 [ 24.144158] do_syscall_64+0x3f/0x90 [ 24.144642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.145287] [ 24.145506] Freed by task 19: [ 24.145898] kasan_save_stack+0x22/0x50 [ 24.146403] kasan_set_track+0x25/0x30 [ 24.146897] kasan_save_free_info+0x2b/0x50 [ 24.147441] __kasan_slab_free+0x10a/0x190 [ 24.147983] kmem_cache_free+0x10d/0x4d0 [ 24.148502] rcu_core+0x8c8/0x2860 [ 24.148942] __do_softirq+0x1b7/0x7d4 [ 24.149426] [ 24.149645] Last potentially related work creation: [ 24.150235] kasan_save_stack+0x22/0x50 [ 24.150749] __kasan_record_aux_stack+0x8e/0xa0 [ 24.151320] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.151969] remove_vma+0x139/0x170 [ 24.152402] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.152997] do_vmi_munmap+0x1f1/0x2b0 [ 24.153459] __vm_munmap+0x138/0x3a0 [ 24.153898] __x64_sys_munmap+0x59/0x80 [ 24.154372] do_syscall_64+0x3f/0x90 [ 24.154834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.155443] [ 24.155647] The buggy address belongs to the object at ffff88800ea78658 [ 24.155647] which belongs to the cache vm_area_struct of size 168 [ 24.157017] The buggy address is located 88 bytes inside of [ 24.157017] freed 168-byte region [ffff88800ea78658, ffff88800ea78700) [ 24.158339] [ 24.158567] The buggy address belongs to the physical page: [ 24.159190] page:00000000c7dcb5b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea78 [ 24.160204] memcg:ffff88800eaabc01 [ 24.160608] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.161259] page_type: 0xffffffff() [ 24.161685] raw: 0100000000000200 ffff8880087a0c80 ffffea000040a000 dead000000000003 [ 24.162559] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaabc01 [ 24.163417] page dumped because: kasan: bad access detected [ 24.164069] [ 24.164280] Memory state around the buggy address: [ 24.164863] ffff88800ea78580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.165723] ffff88800ea78600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.166604] >ffff88800ea78680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.167465] ^ [ 24.168055] ffff88800ea78700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.168918] ffff88800ea78780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.169773] ================================================================== [ 24.170901] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.098659] BUG: Bad rss-counter state mm:00000000fb5a121b type:MM_FILEPAGES val:33 [ 26.099679] BUG: Bad rss-counter state mm:00000000fb5a121b type:MM_ANONPAGES val:22 [ 26.598546] BUG: Bad rss-counter state mm:00000000da306a49 type:MM_FILEPAGES val:33 [ 26.599666] BUG: Bad rss-counter state mm:00000000da306a49 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21128' (ECDSA) to the list of known hosts. 2023/06/20 19:14:09 fuzzer started 2023/06/20 19:14:10 dialing manager at localhost:36067 2023/06/20 19:14:10 checking machine... 2023/06/20 19:14:10 checking revisions... [ 27.330900] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:14:10 testing simple program... [ 27.374966] cgroup: Unknown subsys name 'net' [ 27.455239] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:14:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d9f978 RCX=0000000000000001 RDX=1ffff110011b3f30 RSI=ffff888008d9faa8 RDI=ffff888008d9f980 RBP=ffff888008d9faa8 RSP=ffff888008d9f8d0 R8 =ffffffff860d825a R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000010b8d R12=0000000000000008 R13=ffff888008d9f9c0 R14=ffff888008d9fab0 R15=ffff888008d9f978 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=00007f28c54bf650 CR3=000000000c4e4000 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=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 info registers vcpu 1 RAX=ffffffff8185af33 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014747e01 RSI=ffff888014747e80 RDI=ffff888014747e80 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff8614148e R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000223eb R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff888014747e88 R15=ffff88806cf09a78 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007ff30c45e900 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=00007ff30b97c000 CR3=000000000f2b8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7e7525131c2c8cc900000000000ae988 XMM05=74627429cba930360000000000132cf8 XMM06=806171799158d96700000000001314a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000