[ 24.123066] BUG: Bad rss-counter state mm:0000000054f09708 type:MM_FILEPAGES val:33 [ 24.124621] BUG: Bad rss-counter state mm:0000000054f09708 type:MM_ANONPAGES val:22 [ 24.220354] ================================================================== [ 24.221276] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.222376] Read of size 8 at addr ffff88800e43c4e0 by task sshd/220 [ 24.223170] [ 24.223391] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.224261] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.225252] Call Trace: [ 24.225576] [ 24.225867] dump_stack_lvl+0x91/0xf0 [ 24.226380] print_report+0xcc/0x620 [ 24.226882] ? __virt_addr_valid+0x102/0x340 [ 24.227463] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.228085] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.228819] kasan_report+0xbe/0xf0 [ 24.229326] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.229958] vma_interval_tree_remove+0xc75/0xec0 [ 24.230634] vma_prepare+0xc54/0x11a0 [ 24.231171] __split_vma+0x5af/0x950 [ 24.231695] ? __pfx___split_vma+0x10/0x10 [ 24.232269] ? find_held_lock+0x2c/0x110 [ 24.232834] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.233448] ? lock_is_held_type+0x9f/0x120 [ 24.234028] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.234700] ? mtree_range_walk+0x632/0x900 [ 24.235316] ? mas_walk+0x5c7/0x7c0 [ 24.235832] do_vmi_munmap+0x1f1/0x2b0 [ 24.236381] mmap_region+0x1f9/0x2660 [ 24.236899] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.237458] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.238231] ? __pfx_lock_acquire+0x10/0x10 [ 24.238818] ? __pfx_mmap_region+0x10/0x10 [ 24.239412] ? security_mmap_addr+0x7d/0xa0 [ 24.239983] ? get_unmapped_area+0x1f5/0x3f0 [ 24.240596] do_mmap+0x854/0xf00 [ 24.241069] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.241609] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.242216] ksys_mmap_pgoff+0x3af/0x500 [ 24.242782] do_syscall_64+0x3f/0x90 [ 24.243321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.244011] RIP: 0033:0x7f0e30cefd82 [ 24.244512] 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 [ 24.246860] RSP: 002b:00007ffd25a1aed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.247853] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e30cefd82 [ 24.248781] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e30129000 [ 24.249716] RBP: 00007f0e30129000 R08: 0000000000000009 R09: 0000000000001000 [ 24.250655] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580f3077b20 [ 24.251658] R13: 00007ffd25a1aef0 R14: 00007ffd25a1af20 R15: 00007ffd25a1b280 [ 24.252734] [ 24.253105] [ 24.253348] Allocated by task 213: [ 24.253810] kasan_save_stack+0x22/0x50 [ 24.254362] kasan_set_track+0x25/0x30 [ 24.254904] __kasan_slab_alloc+0x59/0x70 [ 24.255490] kmem_cache_alloc+0x16b/0x370 [ 24.256049] vm_area_dup+0x20/0x160 [ 24.256557] __split_vma+0x170/0x950 [ 24.257061] split_vma+0xc6/0x110 [ 24.257542] mprotect_fixup+0x8d2/0xb30 [ 24.258078] do_mprotect_pkey+0x87e/0xd40 [ 24.258660] __x64_sys_mprotect+0x78/0xc0 [ 24.259239] do_syscall_64+0x3f/0x90 [ 24.259749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.260458] [ 24.260689] Freed by task 213: [ 24.261114] kasan_save_stack+0x22/0x50 [ 24.261665] kasan_set_track+0x25/0x30 [ 24.262199] kasan_save_free_info+0x2b/0x50 [ 24.262785] __kasan_slab_free+0x10a/0x190 [ 24.263386] kmem_cache_free+0x10d/0x4d0 [ 24.264021] rcu_core+0x8c8/0x2860 [ 24.264511] __do_softirq+0x1b7/0x7d4 [ 24.265034] [ 24.265277] Last potentially related work creation: [ 24.265903] kasan_save_stack+0x22/0x50 [ 24.266459] __kasan_record_aux_stack+0x8e/0xa0 [ 24.267097] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.267807] remove_vma+0x139/0x170 [ 24.268302] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.268897] do_vmi_munmap+0x1f1/0x2b0 [ 24.269427] __vm_munmap+0x138/0x3a0 [ 24.269927] __x64_sys_munmap+0x59/0x80 [ 24.270468] do_syscall_64+0x3f/0x90 [ 24.270981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.271678] [ 24.271910] The buggy address belongs to the object at ffff88800e43c488 [ 24.271910] which belongs to the cache vm_area_struct of size 168 [ 24.273494] The buggy address is located 88 bytes inside of [ 24.273494] freed 168-byte region [ffff88800e43c488, ffff88800e43c530) [ 24.275019] [ 24.275264] The buggy address belongs to the physical page: [ 24.275973] page:00000000bf4fa451 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe43c [ 24.277158] memcg:ffff88800e272401 [ 24.277617] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.278328] page_type: 0xffffffff() [ 24.278825] raw: 0100000000000200 ffff8880087a0c80 ffffea000037a8c0 dead000000000008 [ 24.279815] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e272401 [ 24.280801] page dumped because: kasan: bad access detected [ 24.281526] [ 24.281754] Memory state around the buggy address: [ 24.282382] ffff88800e43c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.283327] ffff88800e43c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.284262] >ffff88800e43c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.285191] ^ [ 24.285989] ffff88800e43c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.286938] ffff88800e43c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.287866] ================================================================== [ 24.288868] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.274079] BUG: Bad rss-counter state mm:00000000134153a8 type:MM_FILEPAGES val:33 [ 26.275481] BUG: Bad rss-counter state mm:00000000134153a8 type:MM_ANONPAGES val:22 [ 26.806066] BUG: Bad rss-counter state mm:00000000c699bbf5 type:MM_FILEPAGES val:33 [ 26.807077] BUG: Bad rss-counter state mm:00000000c699bbf5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15582' (ECDSA) to the list of known hosts. 2023/06/21 03:56:46 fuzzer started 2023/06/21 03:56:46 dialing manager at localhost:36067 2023/06/21 03:56:46 checking machine... 2023/06/21 03:56:46 checking revisions... [ 27.474933] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:56:47 testing simple program... [ 27.535890] cgroup: Unknown subsys name 'net' [ 27.586158] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:56:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016a17d80 RCX=ffffffff838721cc RDX=ffff88800ea91b40 RSI=0000000000000000 RDI=0000000000000005 RBP=00000000000000f4 RSP=ffff888016a17be0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000019 R11=0000000000000000 R12=ffff888018dfb3c0 R13=ffff88800ca72140 R14=0000000000000019 R15=0000000000000000 RIP=ffffffff814c0864 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 00007fd0f5092900 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=00007ffd7341e000 CR3=00000000096dc000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f06ea695a40 CR3=000000000cbae000 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=45809581c2890f8e7a4c4b4fbed34e98 XMM02=2c67c8bc2e329bc3000000000011d028 XMM03=fb795ef6d65770560000000000120cd0 XMM04=a6c503a38028f21500000000000ae988 XMM05=4aa3db3b51d45e4800000000001312d0 XMM06=4fda316b135da52b0000000000130770 XMM07=e042d86d42eb936e0000000000120f50 XMM08=08345b4bdb69a7c3000000000011d088 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000