[ 24.036508] BUG: Bad rss-counter state mm:000000004a762144 type:MM_FILEPAGES val:33 [ 24.037759] BUG: Bad rss-counter state mm:000000004a762144 type:MM_ANONPAGES val:22 [ 24.167017] ================================================================== [ 24.167720] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.168454] Read of size 8 at addr ffff88801b841310 by task sshd/220 [ 24.169038] [ 24.169211] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.169982] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.170766] Call Trace: [ 24.171012] [ 24.171231] dump_stack_lvl+0x91/0xf0 [ 24.171611] print_report+0xcc/0x620 [ 24.171987] ? __virt_addr_valid+0x102/0x340 [ 24.172429] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.172905] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.173377] kasan_report+0xbe/0xf0 [ 24.173797] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.174342] vma_interval_tree_remove+0xc75/0xec0 [ 24.174871] vma_prepare+0xc54/0x11a0 [ 24.175278] __split_vma+0x5af/0x950 [ 24.175677] ? __pfx___split_vma+0x10/0x10 [ 24.176120] ? find_held_lock+0x2c/0x110 [ 24.176553] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.177023] ? lock_is_held_type+0x9f/0x120 [ 24.177482] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.178007] ? mtree_range_walk+0x632/0x900 [ 24.178467] ? mas_walk+0x5c7/0x7c0 [ 24.178861] do_vmi_munmap+0x1f1/0x2b0 [ 24.179274] mmap_region+0x1f9/0x2660 [ 24.179678] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.180107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.180704] ? __pfx_lock_acquire+0x10/0x10 [ 24.181149] ? __pfx_mmap_region+0x10/0x10 [ 24.181599] ? security_mmap_addr+0x7d/0xa0 [ 24.182053] ? get_unmapped_area+0x1f5/0x3f0 [ 24.182525] do_mmap+0x854/0xf00 [ 24.182893] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.183311] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.183790] ksys_mmap_pgoff+0x3af/0x500 [ 24.184229] do_syscall_64+0x3f/0x90 [ 24.184652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.185204] RIP: 0033:0x7f84ea7a3d82 [ 24.185598] 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 [ 24.187294] RSP: 002b:00007fffef3d3748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.187976] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84ea7a3d82 [ 24.188617] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84e9bdd000 [ 24.189265] RBP: 00007f84e9bdd000 R08: 0000000000000009 R09: 0000000000001000 [ 24.189923] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ece6d92b20 [ 24.190573] R13: 00007fffef3d3760 R14: 00007fffef3d3790 R15: 00007fffef3d3af0 [ 24.191220] [ 24.191444] [ 24.191609] Allocated by task 209: [ 24.191937] kasan_save_stack+0x22/0x50 [ 24.192319] kasan_set_track+0x25/0x30 [ 24.192701] __kasan_slab_alloc+0x59/0x70 [ 24.193105] kmem_cache_alloc+0x16b/0x370 [ 24.193504] vm_area_dup+0x20/0x160 [ 24.193867] __split_vma+0x170/0x950 [ 24.194221] split_vma+0xc6/0x110 [ 24.194559] mprotect_fixup+0x8d2/0xb30 [ 24.194945] do_mprotect_pkey+0x87e/0xd40 [ 24.195343] __x64_sys_mprotect+0x78/0xc0 [ 24.195744] do_syscall_64+0x3f/0x90 [ 24.196109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.196602] [ 24.196771] Freed by task 209: [ 24.197069] kasan_save_stack+0x22/0x50 [ 24.197453] kasan_set_track+0x25/0x30 [ 24.197833] kasan_save_free_info+0x2b/0x50 [ 24.198242] __kasan_slab_free+0x10a/0x190 [ 24.198652] kmem_cache_free+0x10d/0x4d0 [ 24.199041] rcu_core+0x8c8/0x2860 [ 24.199377] __do_softirq+0x1b7/0x7d4 [ 24.199745] [ 24.199912] Last potentially related work creation: [ 24.200358] kasan_save_stack+0x22/0x50 [ 24.200742] __kasan_record_aux_stack+0x8e/0xa0 [ 24.201179] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.201670] remove_vma+0x139/0x170 [ 24.202032] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.202452] do_vmi_munmap+0x1f1/0x2b0 [ 24.202820] __vm_munmap+0x138/0x3a0 [ 24.203181] __x64_sys_munmap+0x59/0x80 [ 24.203565] do_syscall_64+0x3f/0x90 [ 24.203931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.204421] [ 24.204586] The buggy address belongs to the object at ffff88801b8412b8 [ 24.204586] which belongs to the cache vm_area_struct of size 168 [ 24.205691] The buggy address is located 88 bytes inside of [ 24.205691] freed 168-byte region [ffff88801b8412b8, ffff88801b841360) [ 24.206760] [ 24.206931] The buggy address belongs to the physical page: [ 24.207427] page:000000004116bd76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b841 [ 24.208248] memcg:ffff88801a3cd901 [ 24.208568] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.209054] page_type: 0xffffffff() [ 24.209399] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.210103] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3cd901 [ 24.210829] page dumped because: kasan: bad access detected [ 24.211346] [ 24.211509] Memory state around the buggy address: [ 24.211946] ffff88801b841200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.212592] ffff88801b841280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.213233] >ffff88801b841300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.213881] ^ [ 24.214232] ffff88801b841380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.214867] ffff88801b841400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.215511] ================================================================== [ 24.216263] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.961985] BUG: Bad rss-counter state mm:000000004202b36b type:MM_FILEPAGES val:33 [ 26.962982] BUG: Bad rss-counter state mm:000000004202b36b type:MM_ANONPAGES val:22 [ 27.404423] BUG: Bad rss-counter state mm:0000000003f99c16 type:MM_FILEPAGES val:33 [ 27.405677] BUG: Bad rss-counter state mm:0000000003f99c16 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15917' (ECDSA) to the list of known hosts. 2023/06/20 23:46:51 fuzzer started 2023/06/20 23:46:52 dialing manager at localhost:36067 2023/06/20 23:46:52 checking machine... 2023/06/20 23:46:52 checking revisions... [ 28.149729] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:46:52 testing simple program... [ 28.191700] cgroup: Unknown subsys name 'net' [ 28.228097] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:46:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000002 RDX=1ffff1100d9c1357 RSI=ffff88806ce09e00 RDI=ffff88806ce09ac0 RBP=ffff88806ce09e58 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000000fc0c R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09e00 R15=ffff88806ce09a70 RIP=ffffffff81131c60 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 00007f25840a1900 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=00007f25834e1070 CR3=000000000d5e2000 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=2c375cf82604429a1f4e7b904ca9c9cd XMM02=0000000000119ff0eff9b2d0a8fce9cb XMM03=000000000011a0c02c67c8bc2e329bc3 XMM04=7cb95ba510dafe3d00000000000ae988 XMM05=1776cab5c35814180000000000131b08 XMM06=e0a9349b9e0768bf0000000000130840 XMM07=fb795ef6d6577056000000000011f608 XMM08=2c67c8bc2e329bc3000000000011a060 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800dad73e8 RCX=0000000000000001 RDX=1ffff11001b5ae7e RSI=ffff88800dad7768 RDI=ffff88800dad73f0 RBP=ffff88800dad7768 RSP=ffff88800dad7340 R8 =ffffffff861390ac R9 =ffff88800dad7428 R10=0000000000038001 R11=0000000000020de5 R12=0000000000000008 R13=ffff88800dad7430 R14=ffff88800dad7770 R15=ffff88800dad73e8 RIP=ffffffff81130445 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 00007fc517913900 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=00007ffe359ff000 CR3=0000000015a58000 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