[ 26.982334] BUG: Bad rss-counter state mm:00000000097c9098 type:MM_FILEPAGES val:33 [ 26.984023] BUG: Bad rss-counter state mm:00000000097c9098 type:MM_ANONPAGES val:22 [ 27.150939] ================================================================== [ 27.151871] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.152811] Read of size 8 at addr ffff88800df85968 by task sshd/220 [ 27.153582] [ 27.153799] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.154728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.155709] Call Trace: [ 27.156085] [ 27.156371] dump_stack_lvl+0x91/0xf0 [ 27.156861] print_report+0xcc/0x620 [ 27.157352] ? __virt_addr_valid+0x102/0x340 [ 27.157903] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.158520] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.159139] kasan_report+0xbe/0xf0 [ 27.159618] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.160244] vma_interval_tree_remove+0xc75/0xec0 [ 27.160862] vma_prepare+0xc54/0x11a0 [ 27.161344] __split_vma+0x5af/0x950 [ 27.161820] ? __pfx___split_vma+0x10/0x10 [ 27.162360] ? find_held_lock+0x2c/0x110 [ 27.162882] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.163456] ? lock_is_held_type+0x9f/0x120 [ 27.164026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.164651] ? mtree_range_walk+0x632/0x900 [ 27.165212] ? mas_walk+0x5c7/0x7c0 [ 27.165685] do_vmi_munmap+0x1f1/0x2b0 [ 27.166177] mmap_region+0x1f9/0x2660 [ 27.166662] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.167176] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.167896] ? __pfx_lock_acquire+0x10/0x10 [ 27.168443] ? __pfx_mmap_region+0x10/0x10 [ 27.168988] ? security_mmap_addr+0x7d/0xa0 [ 27.169536] ? get_unmapped_area+0x1f5/0x3f0 [ 27.170101] do_mmap+0x854/0xf00 [ 27.170546] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.171052] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.171626] ksys_mmap_pgoff+0x3af/0x500 [ 27.172141] do_syscall_64+0x3f/0x90 [ 27.172629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.173292] RIP: 0033:0x7f7e340efd82 [ 27.173757] 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 [ 27.175927] RSP: 002b:00007ffcdc0c02c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.176849] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7e340efd82 [ 27.177717] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7e33529000 [ 27.178588] RBP: 00007f7e33529000 R08: 0000000000000009 R09: 0000000000001000 [ 27.179454] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d8c961ec0 [ 27.180329] R13: 00007ffcdc0c02e0 R14: 00007ffcdc0c0310 R15: 00007ffcdc0c0670 [ 27.181195] [ 27.181502] [ 27.181720] Allocated by task 213: [ 27.182156] kasan_save_stack+0x22/0x50 [ 27.182668] kasan_set_track+0x25/0x30 [ 27.183173] __kasan_slab_alloc+0x59/0x70 [ 27.183713] kmem_cache_alloc+0x16b/0x370 [ 27.184266] vm_area_dup+0x20/0x160 [ 27.184730] __split_vma+0x170/0x950 [ 27.185208] split_vma+0xc6/0x110 [ 27.185663] mprotect_fixup+0x8d2/0xb30 [ 27.186175] do_mprotect_pkey+0x87e/0xd40 [ 27.186715] __x64_sys_mprotect+0x78/0xc0 [ 27.187239] do_syscall_64+0x3f/0x90 [ 27.187716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.188382] [ 27.188599] Freed by task 213: [ 27.188993] kasan_save_stack+0x22/0x50 [ 27.189510] kasan_set_track+0x25/0x30 [ 27.190014] kasan_save_free_info+0x2b/0x50 [ 27.190557] __kasan_slab_free+0x10a/0x190 [ 27.191111] kmem_cache_free+0x10d/0x4d0 [ 27.191636] rcu_core+0x8c8/0x2860 [ 27.192102] __do_softirq+0x1b7/0x7d4 [ 27.192591] [ 27.192814] Last potentially related work creation: [ 27.193422] kasan_save_stack+0x22/0x50 [ 27.193939] __kasan_record_aux_stack+0x8e/0xa0 [ 27.194527] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.195182] remove_vma+0x139/0x170 [ 27.195642] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.196234] do_vmi_munmap+0x1f1/0x2b0 [ 27.196735] __vm_munmap+0x138/0x3a0 [ 27.197205] __x64_sys_munmap+0x59/0x80 [ 27.197710] do_syscall_64+0x3f/0x90 [ 27.198195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.198846] [ 27.199066] Second to last potentially related work creation: [ 27.199769] kasan_save_stack+0x22/0x50 [ 27.200280] __kasan_record_aux_stack+0x8e/0xa0 [ 27.200854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.201498] remove_vma+0x139/0x170 [ 27.201952] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.202521] do_vmi_munmap+0x1f1/0x2b0 [ 27.203019] __vm_munmap+0x138/0x3a0 [ 27.203503] __x64_sys_munmap+0x59/0x80 [ 27.204025] do_syscall_64+0x3f/0x90 [ 27.204512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.205164] [ 27.205382] The buggy address belongs to the object at ffff88800df85910 [ 27.205382] which belongs to the cache vm_area_struct of size 168 [ 27.206871] The buggy address is located 88 bytes inside of [ 27.206871] freed 168-byte region [ffff88800df85910, ffff88800df859b8) [ 27.208300] [ 27.208521] The buggy address belongs to the physical page: [ 27.209189] page:00000000baf584b7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf85 [ 27.210303] memcg:ffff88800cd59301 [ 27.210734] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.211396] page_type: 0xffffffff() [ 27.211861] raw: 0100000000000200 ffff88800879fc80 ffffea000035f480 dead000000000004 [ 27.212791] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd59301 [ 27.213719] page dumped because: kasan: bad access detected [ 27.214396] [ 27.214617] Memory state around the buggy address: [ 27.215205] ffff88800df85800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 27.216102] ffff88800df85880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 27.216985] >ffff88800df85900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.217901] ^ [ 27.218728] ffff88800df85980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 27.219603] ffff88800df85a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.220465] ================================================================== [ 27.221575] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.180414] BUG: Bad rss-counter state mm:00000000876f06f3 type:MM_FILEPAGES val:33 [ 29.181584] BUG: Bad rss-counter state mm:00000000876f06f3 type:MM_ANONPAGES val:22 [ 29.560485] BUG: Bad rss-counter state mm:0000000035833578 type:MM_FILEPAGES val:33 [ 29.561473] BUG: Bad rss-counter state mm:0000000035833578 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57313' (ECDSA) to the list of known hosts. 2023/06/19 23:49:02 fuzzer started 2023/06/19 23:49:02 dialing manager at localhost:44161 2023/06/19 23:49:02 checking machine... 2023/06/19 23:49:02 checking revisions... [ 30.295663] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:49:02 testing simple program... [ 30.343037] cgroup: Unknown subsys name 'net' [ 30.381197] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:48:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea0000763b80 RCX=0000000000000000 RDX=ffff88800efbb680 RSI=ffffffff81711e2f RDI=0000000000000007 RBP=ffff8880145b7d90 RSP=ffff8880145b7bf8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800d70d9f8 R14=ffffea0000763b80 R15=0000000000000000 RIP=ffffffff814c081b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f82bccdd900 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=00007f82bd44f3ec CR3=000000000e89c000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=0000000000000008 RBX=ffffffff8604dcec RCX=ffffffff8450b05d RDX=0000000000000011 RSI=ffffffff864b1140 RDI=ffffffff8604dccc RBP=ffffffff8604dccc RSP=ffff88806cf099e0 R8 =ffffffff864b1140 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffffffff8604dd10 R13=ffffffff8604dccc R14=ffffffff8604dccc R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000213 [----A-C] 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=00007f2dce11f000 CR3=000000000e8b6000 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=2031303a39343a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a39343a3332203931 XMM08=00000000000000000000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000