[ 30.939037] BUG: Bad rss-counter state mm:000000007bdeaaf7 type:MM_FILEPAGES val:33 [ 30.940663] BUG: Bad rss-counter state mm:000000007bdeaaf7 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.098812] ================================================================== [ 31.099930] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.100951] Read of size 8 at addr ffff88800e297968 by task sshd/219 [ 31.101969] [ 31.102192] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.103099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.104148] Call Trace: [ 31.104463] [ 31.104756] dump_stack_lvl+0x91/0xf0 [ 31.105247] print_report+0xcc/0x620 [ 31.105744] ? __virt_addr_valid+0x102/0x340 [ 31.106301] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.106926] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.107544] kasan_report+0xbe/0xf0 [ 31.108049] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.108672] vma_interval_tree_remove+0xc75/0xec0 [ 31.109331] vma_prepare+0xc54/0x11a0 [ 31.109842] __split_vma+0x5af/0x950 [ 31.110323] ? __pfx___split_vma+0x10/0x10 [ 31.110861] ? find_held_lock+0x2c/0x110 [ 31.111388] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.111987] ? lock_is_held_type+0x9f/0x120 [ 31.112535] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.113159] ? mtree_range_walk+0x632/0x900 [ 31.113720] ? mas_walk+0x5c7/0x7c0 [ 31.114213] do_vmi_munmap+0x1f1/0x2b0 [ 31.114707] mmap_region+0x1f9/0x2660 [ 31.115206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.115722] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.116467] ? __pfx_lock_acquire+0x10/0x10 [ 31.117011] ? __pfx_mmap_region+0x10/0x10 [ 31.117546] ? security_mmap_addr+0x7d/0xa0 [ 31.118085] ? get_unmapped_area+0x1f5/0x3f0 [ 31.118640] do_mmap+0x854/0xf00 [ 31.119090] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.119585] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.120190] ksys_mmap_pgoff+0x3af/0x500 [ 31.120698] do_syscall_64+0x3f/0x90 [ 31.121189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.121847] RIP: 0033:0x7f0f20192d82 [ 31.122322] 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 [ 31.124500] RSP: 002b:00007ffd46d89eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.125413] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f20192d82 [ 31.126277] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f1f5cc000 [ 31.127121] RBP: 00007f0f1f5cc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.127988] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de2e1bbec0 [ 31.128855] R13: 00007ffd46d89ed0 R14: 00007ffd46d89f00 R15: 00007ffd46d8a260 [ 31.129745] [ 31.130041] [ 31.130255] Allocated by task 212: [ 31.130698] kasan_save_stack+0x22/0x50 [ 31.131206] kasan_set_track+0x25/0x30 [ 31.131715] __kasan_slab_alloc+0x59/0x70 [ 31.132255] kmem_cache_alloc+0x16b/0x370 [ 31.132781] vm_area_dup+0x20/0x160 [ 31.133240] __split_vma+0x170/0x950 [ 31.133719] split_vma+0xc6/0x110 [ 31.134159] mprotect_fixup+0x8d2/0xb30 [ 31.134670] do_mprotect_pkey+0x87e/0xd40 [ 31.135192] __x64_sys_mprotect+0x78/0xc0 [ 31.135735] do_syscall_64+0x3f/0x90 [ 31.136220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.136875] [ 31.137091] Freed by task 212: [ 31.137496] kasan_save_stack+0x22/0x50 [ 31.138002] kasan_set_track+0x25/0x30 [ 31.138518] kasan_save_free_info+0x2b/0x50 [ 31.139059] __kasan_slab_free+0x10a/0x190 [ 31.139606] kmem_cache_free+0x10d/0x4d0 [ 31.140136] rcu_core+0x8c8/0x2860 [ 31.140597] __do_softirq+0x1b7/0x7d4 [ 31.141083] [ 31.141303] Last potentially related work creation: [ 31.141915] kasan_save_stack+0x22/0x50 [ 31.142422] __kasan_record_aux_stack+0x8e/0xa0 [ 31.143062] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.143723] remove_vma+0x139/0x170 [ 31.144196] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.144776] do_vmi_munmap+0x1f1/0x2b0 [ 31.145259] __vm_munmap+0x138/0x3a0 [ 31.145737] __x64_sys_munmap+0x59/0x80 [ 31.146239] do_syscall_64+0x3f/0x90 [ 31.146741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.147392] [ 31.147612] The buggy address belongs to the object at ffff88800e297910 [ 31.147612] which belongs to the cache vm_area_struct of size 168 [ 31.149131] The buggy address is located 88 bytes inside of [ 31.149131] freed 168-byte region [ffff88800e297910, ffff88800e2979b8) [ 31.150562] [ 31.150790] The buggy address belongs to the physical page: [ 31.151452] page:000000006b7c15d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe297 [ 31.152576] memcg:ffff88800ddaa201 [ 31.153018] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.153727] page_type: 0xffffffff() [ 31.154189] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a0d80 dead000000000003 [ 31.155129] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddaa201 [ 31.156055] page dumped because: kasan: bad access detected [ 31.156716] [ 31.156946] Memory state around the buggy address: [ 31.157545] ffff88800e297800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.158418] ffff88800e297880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.159295] >ffff88800e297900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.160178] ^ [ 31.160975] ffff88800e297980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.161844] ffff88800e297a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.162724] ================================================================== [ 31.163657] Disabling lock debugging due to kernel taint [ 33.058984] BUG: Bad rss-counter state mm:000000000304075f type:MM_FILEPAGES val:33 [ 33.060177] BUG: Bad rss-counter state mm:000000000304075f type:MM_ANONPAGES val:22 [ 33.522924] BUG: Bad rss-counter state mm:00000000c4eb2835 type:MM_FILEPAGES val:33 [ 33.524130] BUG: Bad rss-counter state mm:00000000c4eb2835 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4429' (ECDSA) to the list of known hosts. 2023/06/20 22:35:49 fuzzer started 2023/06/20 22:35:49 dialing manager at localhost:36067 2023/06/20 22:35:49 checking machine... 2023/06/20 22:35:49 checking revisions... [ 34.173098] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:35:49 testing simple program... [ 34.234063] cgroup: Unknown subsys name 'net' [ 34.302014] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:35:48 Registers: info registers vcpu 0 RAX=0000000000000010 RBX=0000000000000002 RCX=ffffffff86138976 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff8613897a R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09e38 R15=ffff88806ce09a78 RIP=ffffffff81130bba 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 00007f6fc463e900 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=00007f6fc3b5c000 CR3=000000000ca88000 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=ab5ba04b52e3dd0f00000000000ae988 XMM05=e6a808d6b05078810000000000132e10 XMM06=806171799158d9670000000000131890 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fb4e22130b0 CR3=000000000cb3c000 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=2038343a35333a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a35333a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000