syzkaller login: [ 30.947628] BUG: Bad rss-counter state mm:0000000005a25c36 type:MM_FILEPAGES val:33 [ 30.949133] BUG: Bad rss-counter state mm:0000000005a25c36 type:MM_ANONPAGES val:22 [ 31.114267] ================================================================== [ 31.115178] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.116126] Read of size 8 at addr ffff888019d28310 by task sshd/220 [ 31.117004] [ 31.117229] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.118107] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.119086] Call Trace: [ 31.119416] [ 31.119700] dump_stack_lvl+0x91/0xf0 [ 31.120198] print_report+0xcc/0x620 [ 31.120685] ? __virt_addr_valid+0x102/0x340 [ 31.121246] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.121858] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.122503] kasan_report+0xbe/0xf0 [ 31.122996] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.123632] vma_interval_tree_remove+0xc75/0xec0 [ 31.124251] vma_prepare+0xc54/0x11a0 [ 31.124739] __split_vma+0x5af/0x950 [ 31.125223] ? __pfx___split_vma+0x10/0x10 [ 31.125762] ? find_held_lock+0x2c/0x110 [ 31.126303] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.126881] ? lock_is_held_type+0x9f/0x120 [ 31.127449] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.128065] ? mtree_range_walk+0x632/0x900 [ 31.128635] ? mas_walk+0x5c7/0x7c0 [ 31.129126] do_vmi_munmap+0x1f1/0x2b0 [ 31.129643] mmap_region+0x1f9/0x2660 [ 31.130147] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.130674] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.131398] ? __pfx_lock_acquire+0x10/0x10 [ 31.131943] ? __pfx_mmap_region+0x10/0x10 [ 31.132496] ? security_mmap_addr+0x7d/0xa0 [ 31.133048] ? get_unmapped_area+0x1f5/0x3f0 [ 31.133614] do_mmap+0x854/0xf00 [ 31.134091] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.134598] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.135168] ksys_mmap_pgoff+0x3af/0x500 [ 31.135688] do_syscall_64+0x3f/0x90 [ 31.136173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.136832] RIP: 0033:0x7f0066500d82 [ 31.137297] 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 [ 31.139457] RSP: 002b:00007ffc2b453668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.140368] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0066500d82 [ 31.141231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f006593a000 [ 31.142122] RBP: 00007f006593a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.142973] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562492218ec0 [ 31.143815] R13: 00007ffc2b453680 R14: 00007ffc2b4536b0 R15: 00007ffc2b453a10 [ 31.144670] [ 31.144963] [ 31.145182] Allocated by task 213: [ 31.145616] kasan_save_stack+0x22/0x50 [ 31.146154] kasan_set_track+0x25/0x30 [ 31.146664] __kasan_slab_alloc+0x59/0x70 [ 31.147205] kmem_cache_alloc+0x16b/0x370 [ 31.147733] vm_area_dup+0x20/0x160 [ 31.148203] __split_vma+0x170/0x950 [ 31.148684] split_vma+0xc6/0x110 [ 31.149136] mprotect_fixup+0x8d2/0xb30 [ 31.149647] do_mprotect_pkey+0x87e/0xd40 [ 31.150188] __x64_sys_mprotect+0x78/0xc0 [ 31.150714] do_syscall_64+0x3f/0x90 [ 31.151208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.151860] [ 31.152074] Freed by task 213: [ 31.152471] kasan_save_stack+0x22/0x50 [ 31.152978] kasan_set_track+0x25/0x30 [ 31.153477] kasan_save_free_info+0x2b/0x50 [ 31.154038] __kasan_slab_free+0x10a/0x190 [ 31.154595] kmem_cache_free+0x10d/0x4d0 [ 31.155114] rcu_core+0x8c8/0x2860 [ 31.155571] __do_softirq+0x1b7/0x7d4 [ 31.156065] [ 31.156292] Last potentially related work creation: [ 31.156886] kasan_save_stack+0x22/0x50 [ 31.157390] __kasan_record_aux_stack+0x8e/0xa0 [ 31.157985] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.158643] remove_vma+0x139/0x170 [ 31.159111] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.159676] do_vmi_munmap+0x1f1/0x2b0 [ 31.160166] __vm_munmap+0x138/0x3a0 [ 31.160638] __x64_sys_munmap+0x59/0x80 [ 31.161137] do_syscall_64+0x3f/0x90 [ 31.161616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.162283] [ 31.162506] The buggy address belongs to the object at ffff888019d282b8 [ 31.162506] which belongs to the cache vm_area_struct of size 168 [ 31.163974] The buggy address is located 88 bytes inside of [ 31.163974] freed 168-byte region [ffff888019d282b8, ffff888019d28360) [ 31.165400] [ 31.165619] The buggy address belongs to the physical page: [ 31.166300] page:0000000037555a15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d28 [ 31.167402] memcg:ffff888019d66b01 [ 31.167836] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.168495] page_type: 0xffffffff() [ 31.168950] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.169882] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d66b01 [ 31.170828] page dumped because: kasan: bad access detected [ 31.171502] [ 31.171718] Memory state around the buggy address: [ 31.172300] ffff888019d28200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.173175] ffff888019d28280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.174049] >ffff888019d28300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.174912] ^ [ 31.175375] ffff888019d28380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.176239] ffff888019d28400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.177091] ================================================================== [ 31.178087] Disabling lock debugging due to kernel taint [ 32.956446] BUG: Bad rss-counter state mm:000000004356bcf8 type:MM_FILEPAGES val:33 [ 32.957582] BUG: Bad rss-counter state mm:000000004356bcf8 type:MM_ANONPAGES val:22 [ 33.344327] BUG: Bad rss-counter state mm:000000003aadd3d8 type:MM_FILEPAGES val:33 [ 33.345506] BUG: Bad rss-counter state mm:000000003aadd3d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57562' (ECDSA) to the list of known hosts. 2023/06/20 23:12:16 fuzzer started 2023/06/20 23:12:16 dialing manager at localhost:36067 2023/06/20 23:12:16 checking machine... 2023/06/20 23:12:16 checking revisions... [ 33.958508] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:12:16 testing simple program... [ 34.003716] cgroup: Unknown subsys name 'net' [ 34.056739] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:12:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffeac37a9a8 CR3=0000000005482000 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=00007fc18b9e751000005629dbfb1790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff813ad71f RDX=0000000000003ad7 RSI=0000000000003ad7 RDI=ffffffff864f854c RBP=ffff88800f8bf810 RSP=ffff88800f8bf748 R8 =0000000000000000 R9 =ffff88800f8bf7f8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800f8bf818 R13=ffff88800f8bf800 R14=ffff88800f8bf7f9 R15=ffff88800f8bf7b8 RIP=ffffffff8113077a RFL=00000217 [----APC] 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=00007f8ffe372328 CR3=0000000016b4c000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000