syzkaller login: [ 30.994996] BUG: Bad rss-counter state mm:00000000da4a6a85 type:MM_FILEPAGES val:33 [ 30.996003] BUG: Bad rss-counter state mm:00000000da4a6a85 type:MM_ANONPAGES val:22 [ 31.166332] ================================================================== [ 31.167263] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.168219] Read of size 8 at addr ffff88801a2a7a50 by task sshd/220 [ 31.168987] [ 31.169211] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.170164] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.171170] Call Trace: [ 31.171491] [ 31.171774] dump_stack_lvl+0x91/0xf0 [ 31.172301] print_report+0xcc/0x620 [ 31.172786] ? __virt_addr_valid+0x102/0x340 [ 31.173334] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.173958] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.174600] kasan_report+0xbe/0xf0 [ 31.175079] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.175698] vma_interval_tree_remove+0xc75/0xec0 [ 31.176301] vma_prepare+0xc54/0x11a0 [ 31.176780] __split_vma+0x5af/0x950 [ 31.177250] ? __pfx___split_vma+0x10/0x10 [ 31.177779] ? find_held_lock+0x2c/0x110 [ 31.178299] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.178872] ? lock_is_held_type+0x9f/0x120 [ 31.179416] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.180020] ? mtree_range_walk+0x632/0x900 [ 31.180567] ? mas_walk+0x5c7/0x7c0 [ 31.181043] do_vmi_munmap+0x1f1/0x2b0 [ 31.181542] mmap_region+0x1f9/0x2660 [ 31.182024] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.182554] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.183303] ? __pfx_lock_acquire+0x10/0x10 [ 31.183839] ? __pfx_mmap_region+0x10/0x10 [ 31.184373] ? security_mmap_addr+0x7d/0xa0 [ 31.184911] ? get_unmapped_area+0x1f5/0x3f0 [ 31.185465] do_mmap+0x854/0xf00 [ 31.185912] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.186410] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.187009] ksys_mmap_pgoff+0x3af/0x500 [ 31.187530] do_syscall_64+0x3f/0x90 [ 31.188019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.188667] RIP: 0033:0x7fe411f1ad82 [ 31.189133] 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 [ 31.191262] RSP: 002b:00007ffd9ee5d2a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.192173] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe411f1ad82 [ 31.193010] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe411354000 [ 31.193857] RBP: 00007fe411354000 R08: 0000000000000009 R09: 0000000000001000 [ 31.194724] R10: 0000000000000812 R11: 0000000000000206 R12: 000055692fb0aec0 [ 31.195571] R13: 00007ffd9ee5d2c0 R14: 00007ffd9ee5d2f0 R15: 00007ffd9ee5d650 [ 31.196429] [ 31.196719] [ 31.196937] Allocated by task 213: [ 31.197359] kasan_save_stack+0x22/0x50 [ 31.197861] kasan_set_track+0x25/0x30 [ 31.198355] __kasan_slab_alloc+0x59/0x70 [ 31.198893] kmem_cache_alloc+0x16b/0x370 [ 31.199424] vm_area_dup+0x20/0x160 [ 31.199889] __split_vma+0x170/0x950 [ 31.200361] split_vma+0xc6/0x110 [ 31.200800] mprotect_fixup+0x8d2/0xb30 [ 31.201300] do_mprotect_pkey+0x87e/0xd40 [ 31.201819] __x64_sys_mprotect+0x78/0xc0 [ 31.202342] do_syscall_64+0x3f/0x90 [ 31.202842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.203486] [ 31.203702] Freed by task 213: [ 31.204096] kasan_save_stack+0x22/0x50 [ 31.204595] kasan_set_track+0x25/0x30 [ 31.205083] kasan_save_free_info+0x2b/0x50 [ 31.205618] __kasan_slab_free+0x10a/0x190 [ 31.206149] kmem_cache_free+0x10d/0x4d0 [ 31.206671] rcu_core+0x8c8/0x2860 [ 31.207112] __do_softirq+0x1b7/0x7d4 [ 31.207586] [ 31.207799] Last potentially related work creation: [ 31.208382] kasan_save_stack+0x22/0x50 [ 31.208881] __kasan_record_aux_stack+0x8e/0xa0 [ 31.209447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.210088] remove_vma+0x139/0x170 [ 31.210548] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.211108] do_vmi_munmap+0x1f1/0x2b0 [ 31.211594] __vm_munmap+0x138/0x3a0 [ 31.212063] __x64_sys_munmap+0x59/0x80 [ 31.212563] do_syscall_64+0x3f/0x90 [ 31.213039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.213690] [ 31.213902] The buggy address belongs to the object at ffff88801a2a79f8 [ 31.213902] which belongs to the cache vm_area_struct of size 168 [ 31.215395] The buggy address is located 88 bytes inside of [ 31.215395] freed 168-byte region [ffff88801a2a79f8, ffff88801a2a7aa0) [ 31.216814] [ 31.217042] The buggy address belongs to the physical page: [ 31.217729] page:000000004d468acd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2a7 [ 31.218824] memcg:ffff88800e626d01 [ 31.219250] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.219891] page_type: 0xffffffff() [ 31.220343] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.221257] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e626d01 [ 31.222179] page dumped because: kasan: bad access detected [ 31.222861] [ 31.223075] Memory state around the buggy address: [ 31.223650] ffff88801a2a7900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.224508] ffff88801a2a7980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.225360] >ffff88801a2a7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.226215] ^ [ 31.226967] ffff88801a2a7a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.227853] ffff88801a2a7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.228705] ================================================================== [ 31.229686] Disabling lock debugging due to kernel taint [ 33.472029] BUG: Bad rss-counter state mm:00000000f00a1a21 type:MM_FILEPAGES val:33 [ 33.473287] BUG: Bad rss-counter state mm:00000000f00a1a21 type:MM_ANONPAGES val:22 [ 33.941387] BUG: Bad rss-counter state mm:00000000d9d17bc6 type:MM_FILEPAGES val:33 [ 33.942368] BUG: Bad rss-counter state mm:00000000d9d17bc6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44209' (ECDSA) to the list of known hosts. 2023/06/21 05:14:05 fuzzer started 2023/06/21 05:14:06 dialing manager at localhost:36067 2023/06/21 05:14:06 checking machine... 2023/06/21 05:14:06 checking revisions... [ 34.667646] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:14:06 testing simple program... [ 34.715458] cgroup: Unknown subsys name 'net' [ 34.757624] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:14:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff11001cf0f0b RDX=dffffc0000000000 RSI=ffffffff8185a0f4 RDI=ffff88800e787800 RBP=ffff88800e787858 RSP=ffff88800e787790 R8 =0000000000000001 R9 =ffff88800e787840 R10=0000000000038001 R11=0000000000023906 R12=ffff88800e787860 R13=ffff88800e787848 R14=ffff88800e787841 R15=ffff88800e787800 RIP=ffffffff81130706 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 00007f9d51b7b900 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=00007f0e42f6bff0 CR3=000000000fd0c000 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=0000000000000001 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=00007ffd5ccaf000 CR3=000000000fd0c000 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=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