[ 57.905964] BUG: Bad rss-counter state mm:00000000574f353a type:MM_FILEPAGES val:33 [ 57.906669] BUG: Bad rss-counter state mm:00000000574f353a type:MM_ANONPAGES val:22 [ 58.135436] ================================================================== [ 58.136023] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 58.136946] Read of size 8 at addr ffff88800e423c20 by task sshd/219 [ 58.137420] [ 58.137558] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 58.138155] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 58.138815] Call Trace: [ 58.139017] [ 58.139197] dump_stack_lvl+0x91/0xf0 [ 58.139879] print_report+0xcc/0x620 [ 58.140184] ? __virt_addr_valid+0x102/0x340 [ 58.141021] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.141411] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.141874] kasan_report+0xbe/0xf0 [ 58.142173] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.142559] vma_interval_tree_remove+0xc75/0xec0 [ 58.143039] vma_prepare+0xc54/0x11a0 [ 58.143339] __split_vma+0x5af/0x950 [ 58.143711] ? __pfx___split_vma+0x10/0x10 [ 58.144070] ? find_held_lock+0x2c/0x110 [ 58.144440] do_vmi_align_munmap+0x2ba/0x11f0 [ 58.144850] ? lock_is_held_type+0x9f/0x120 [ 58.145227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 58.145665] ? mtree_range_walk+0x632/0x900 [ 58.146046] ? mas_walk+0x5c7/0x7c0 [ 58.146341] do_vmi_munmap+0x1f1/0x2b0 [ 58.146700] mmap_region+0x1f9/0x2660 [ 58.147009] ? vm_mmap_pgoff+0x15c/0x3a0 [ 58.147330] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 58.147843] ? __pfx_lock_acquire+0x10/0x10 [ 58.148186] ? __pfx_mmap_region+0x10/0x10 [ 58.148546] ? security_mmap_addr+0x7d/0xa0 [ 58.148930] ? get_unmapped_area+0x1f5/0x3f0 [ 58.149270] do_mmap+0x854/0xf00 [ 58.149546] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.149912] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 58.150267] ksys_mmap_pgoff+0x3af/0x500 [ 58.150634] do_syscall_64+0x3f/0x90 [ 58.150939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.151341] RIP: 0033:0x7f76da0a0d82 [ 58.151698] 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 [ 58.153085] RSP: 002b:00007ffc19600928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 58.153700] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76da0a0d82 [ 58.154226] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76d94da000 [ 58.154858] RBP: 00007f76d94da000 R08: 0000000000000009 R09: 0000000000001000 [ 58.155393] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560fded0bd90 [ 58.156023] R13: 00007ffc19600940 R14: 00007ffc19600970 R15: 00007ffc19600cd0 [ 58.156613] [ 58.156830] [ 58.156987] Allocated by task 212: [ 58.157283] kasan_save_stack+0x22/0x50 [ 58.157682] kasan_set_track+0x25/0x30 [ 58.158068] __kasan_slab_alloc+0x59/0x70 [ 58.158439] kmem_cache_alloc+0x16b/0x370 [ 58.158851] vm_area_dup+0x20/0x160 [ 58.159148] __split_vma+0x170/0x950 [ 58.159439] split_vma+0xc6/0x110 [ 58.159784] mprotect_fixup+0x8d2/0xb30 [ 58.160110] do_mprotect_pkey+0x87e/0xd40 [ 58.160447] __x64_sys_mprotect+0x78/0xc0 [ 58.160843] do_syscall_64+0x3f/0x90 [ 58.161149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.161550] [ 58.161745] Freed by task 212: [ 58.162036] kasan_save_stack+0x22/0x50 [ 58.162355] kasan_set_track+0x25/0x30 [ 58.162718] kasan_save_free_info+0x2b/0x50 [ 58.163054] __kasan_slab_free+0x10a/0x190 [ 58.163387] kmem_cache_free+0x10d/0x4d0 [ 58.163775] rcu_core+0x8c8/0x2860 [ 58.164056] __do_softirq+0x1b7/0x7d4 [ 58.164354] [ 58.164500] Last potentially related work creation: [ 58.164927] kasan_save_stack+0x22/0x50 [ 58.165284] __kasan_record_aux_stack+0x8e/0xa0 [ 58.165702] __call_rcu_common.constprop.0+0x6a/0xb90 [ 58.166131] remove_vma+0x139/0x170 [ 58.166403] do_vmi_align_munmap+0xd4a/0x11f0 [ 58.166804] do_vmi_munmap+0x1f1/0x2b0 [ 58.167159] __vm_munmap+0x138/0x3a0 [ 58.167454] __x64_sys_munmap+0x59/0x80 [ 58.167863] do_syscall_64+0x3f/0x90 [ 58.168171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.168682] [ 58.168829] The buggy address belongs to the object at ffff88800e423bc8 [ 58.168829] which belongs to the cache vm_area_struct of size 168 [ 58.169890] The buggy address is located 88 bytes inside of [ 58.169890] freed 168-byte region [ffff88800e423bc8, ffff88800e423c70) [ 58.170862] [ 58.171002] The buggy address belongs to the physical page: [ 58.171406] page:000000006c6feb0c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe423 [ 58.172184] memcg:ffff88800e46d701 [ 58.172468] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 58.173028] page_type: 0xffffffff() [ 58.173310] raw: 0100000000000200 ffff88800879fc80 ffffea000037f600 dead000000000007 [ 58.173957] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e46d701 [ 58.174544] page dumped because: kasan: bad access detected [ 58.175039] [ 58.175176] Memory state around the buggy address: [ 58.175534] ffff88800e423b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.176134] ffff88800e423b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 58.176767] >ffff88800e423c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 58.177403] ^ [ 58.177811] ffff88800e423c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 58.178401] ffff88800e423d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 58.179075] ================================================================== [ 58.188451] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 61.960533] BUG: Bad rss-counter state mm:00000000e5eea787 type:MM_FILEPAGES val:33 [ 61.961237] BUG: Bad rss-counter state mm:00000000e5eea787 type:MM_ANONPAGES val:22 [ 62.955811] BUG: Bad rss-counter state mm:00000000d71570ad type:MM_FILEPAGES val:33 [ 62.956419] BUG: Bad rss-counter state mm:00000000d71570ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35458' (ECDSA) to the list of known hosts. 2023/06/20 09:57:56 fuzzer started 2023/06/20 09:57:56 dialing manager at localhost:44161 2023/06/20 09:57:56 checking machine... 2023/06/20 09:57:56 checking revisions... [ 64.011361] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:57:57 testing simple program... [ 64.065417] cgroup: Unknown subsys name 'net' [ 64.165675] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:57:37 Registers: info registers vcpu 0 RAX=0000000000000030 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8 RSI=ffffffff82505fe5 RDI=ffffffff87f6c0a0 RBP=ffffffff87f6c060 RSP=ffff888010357980 R8 =0000000000000001 R9 =000000000000000a R10=0000000000000030 R11=000000003a475542 R12=0000000000000030 R13=ffffffff87f6c060 R14=0000000000000010 R15=ffffffff82505fd0 RIP=ffffffff8250603d RFL=00000002 [-------] 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=00007fc9a506c328 CR3=0000000016776000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303236 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000006 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88800c42eb80 RSP=ffff888019f2f848 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000006 R14=0000000000000118 R15=ffffea00005a7900 RIP=ffffffff81839785 RFL=00000002 [-------] 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 00007f28d4645900 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=00007f27aacb2db0 CR3=000000000da66000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=0000000000000000313d595449524f49 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=10e66ce9e3831e090000000000135fa8 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=21595b8b63fb7fa100000000000ae988 XMM07=00000000000000000000000000000000 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000