syzkaller login: [ 31.967736] BUG: Bad rss-counter state mm:000000007a4d533c type:MM_FILEPAGES val:33 [ 31.969203] BUG: Bad rss-counter state mm:000000007a4d533c type:MM_ANONPAGES val:22 [ 32.136950] ================================================================== [ 32.138022] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.139126] Read of size 8 at addr ffff888017644d08 by task sshd/220 [ 32.140221] [ 32.140484] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.141543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.142689] Call Trace: [ 32.143016] [ 32.143301] dump_stack_lvl+0x91/0xf0 [ 32.143832] print_report+0xcc/0x620 [ 32.144332] ? __virt_addr_valid+0x102/0x340 [ 32.144898] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.145542] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.146162] kasan_report+0xbe/0xf0 [ 32.146642] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.147283] vma_interval_tree_remove+0xc75/0xec0 [ 32.147911] vma_prepare+0xc54/0x11a0 [ 32.148397] __split_vma+0x5af/0x950 [ 32.148879] ? __pfx___split_vma+0x10/0x10 [ 32.149422] ? find_held_lock+0x2c/0x110 [ 32.149962] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.150543] ? lock_is_held_type+0x9f/0x120 [ 32.151094] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.151741] ? mtree_range_walk+0x632/0x900 [ 32.152301] ? mas_walk+0x5c7/0x7c0 [ 32.152785] do_vmi_munmap+0x1f1/0x2b0 [ 32.153288] mmap_region+0x1f9/0x2660 [ 32.153783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.154315] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.155041] ? __pfx_lock_acquire+0x10/0x10 [ 32.155606] ? __pfx_mmap_region+0x10/0x10 [ 32.156156] ? security_mmap_addr+0x7d/0xa0 [ 32.156702] ? get_unmapped_area+0x1f5/0x3f0 [ 32.157268] do_mmap+0x854/0xf00 [ 32.157717] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.158228] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.158807] ksys_mmap_pgoff+0x3af/0x500 [ 32.159330] do_syscall_64+0x3f/0x90 [ 32.159845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.160508] RIP: 0033:0x7f458a4d7d82 [ 32.160980] 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 [ 32.163180] RSP: 002b:00007fff78306878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.164124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f458a4d7d82 [ 32.164992] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4589911000 [ 32.165866] RBP: 00007f4589911000 R08: 0000000000000009 R09: 0000000000001000 [ 32.166737] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a64e04aec0 [ 32.167619] R13: 00007fff78306890 R14: 00007fff783068c0 R15: 00007fff78306c20 [ 32.168496] [ 32.168794] [ 32.169011] Allocated by task 213: [ 32.169449] kasan_save_stack+0x22/0x50 [ 32.169968] kasan_set_track+0x25/0x30 [ 32.170475] __kasan_slab_alloc+0x59/0x70 [ 32.171013] kmem_cache_alloc+0x16b/0x370 [ 32.171564] vm_area_dup+0x20/0x160 [ 32.172032] __split_vma+0x170/0x950 [ 32.172514] split_vma+0xc6/0x110 [ 32.172970] mprotect_fixup+0x8d2/0xb30 [ 32.173486] do_mprotect_pkey+0x87e/0xd40 [ 32.174023] __x64_sys_mprotect+0x78/0xc0 [ 32.174559] do_syscall_64+0x3f/0x90 [ 32.175047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.175688] [ 32.175904] Freed by task 213: [ 32.176293] kasan_save_stack+0x22/0x50 [ 32.176793] kasan_set_track+0x25/0x30 [ 32.177282] kasan_save_free_info+0x2b/0x50 [ 32.177806] __kasan_slab_free+0x10a/0x190 [ 32.178331] kmem_cache_free+0x10d/0x4d0 [ 32.178835] rcu_core+0x8c8/0x2860 [ 32.179274] __do_softirq+0x1b7/0x7d4 [ 32.179765] [ 32.179979] Last potentially related work creation: [ 32.180557] kasan_save_stack+0x22/0x50 [ 32.181131] __kasan_record_aux_stack+0x8e/0xa0 [ 32.181699] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.182331] remove_vma+0x139/0x170 [ 32.182777] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.183327] do_vmi_munmap+0x1f1/0x2b0 [ 32.183821] __vm_munmap+0x138/0x3a0 [ 32.184280] __x64_sys_munmap+0x59/0x80 [ 32.184780] do_syscall_64+0x3f/0x90 [ 32.185253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.185889] [ 32.186104] Second to last potentially related work creation: [ 32.186781] kasan_save_stack+0x22/0x50 [ 32.187287] __kasan_record_aux_stack+0x8e/0xa0 [ 32.187892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.188535] remove_vma+0x139/0x170 [ 32.188989] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.189541] do_vmi_munmap+0x1f1/0x2b0 [ 32.190024] mmap_region+0x1f9/0x2660 [ 32.190502] do_mmap+0x854/0xf00 [ 32.190932] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.191418] ksys_mmap_pgoff+0x3af/0x500 [ 32.191950] do_syscall_64+0x3f/0x90 [ 32.192422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.193062] [ 32.193277] The buggy address belongs to the object at ffff888017644cb0 [ 32.193277] which belongs to the cache vm_area_struct of size 168 [ 32.194728] The buggy address is located 88 bytes inside of [ 32.194728] freed 168-byte region [ffff888017644cb0, ffff888017644d58) [ 32.196117] [ 32.196333] The buggy address belongs to the physical page: [ 32.196979] page:00000000c56d443b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17644 [ 32.198062] memcg:ffff888017643001 [ 32.198485] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.199126] page_type: 0xffffffff() [ 32.199601] raw: 0100000000000200 ffff88800879fc80 ffffea00005728c0 dead000000000008 [ 32.200511] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017643001 [ 32.201407] page dumped because: kasan: bad access detected [ 32.202063] [ 32.202280] Memory state around the buggy address: [ 32.202861] ffff888017644c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.203728] ffff888017644c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.204577] >ffff888017644d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.205417] ^ [ 32.205850] ffff888017644d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.206695] ffff888017644e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.207570] ================================================================== [ 32.208500] Disabling lock debugging due to kernel taint [ 34.434773] BUG: Bad rss-counter state mm:00000000720333c7 type:MM_FILEPAGES val:33 [ 34.435763] BUG: Bad rss-counter state mm:00000000720333c7 type:MM_ANONPAGES val:22 [ 34.996862] BUG: Bad rss-counter state mm:000000004017beb0 type:MM_FILEPAGES val:33 [ 34.997838] BUG: Bad rss-counter state mm:000000004017beb0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46289' (ECDSA) to the list of known hosts. 2023/06/19 23:44:46 fuzzer started 2023/06/19 23:44:46 dialing manager at localhost:44161 2023/06/19 23:44:46 checking machine... 2023/06/19 23:44:46 checking revisions... [ 35.639186] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:44:46 testing simple program... [ 35.694928] cgroup: Unknown subsys name 'net' [ 35.759660] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:44:45 Registers: info registers vcpu 0 RAX=1ffff11001be5169 RBX=ffff88800df28b18 RCX=1ffff11001ca7744 RDX=dffffc0000000000 RSI=ffff888016368b80 RDI=ffff88800df28b48 RBP=ffff88800e53b538 RSP=ffff88801828fc58 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888016368a48 R13=0000000000000000 R14=ffff88800edcc3d8 R15=ffff88800edcc390 RIP=ffffffff818474fe RFL=00000046 [---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 00007f3f80b30900 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=00007ffd39dd7ff8 CR3=000000000945e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007facb6433fb0 CR3=000000000f50a000 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=02b27940de07f0babc46d162d8699257 XMM02=ec2efd57dc4c00df000000000011e0f8 XMM03=0eb0e724a56582c4000000000011e1c8 XMM04=7c0d332ad57fa43200000000000ae988 XMM05=07c6765d91b552570000000000136c88 XMM06=4fda316b135da52b0000000000135d28 XMM07=e042d86d42eb936e00000000001251e8 XMM08=0eb0e724a56582c4000000000011e1c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000