[ 30.624020] BUG: Bad rss-counter state mm:000000002445909e type:MM_FILEPAGES val:33 [ 30.625061] BUG: Bad rss-counter state mm:000000002445909e type:MM_ANONPAGES val:22 [ 30.792042] ================================================================== [ 30.792970] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.793918] Read of size 8 at addr ffff88800d5b0968 by task sshd/218 [ 30.794687] [ 30.794909] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.795930] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.796898] Call Trace: [ 30.797219] [ 30.797533] dump_stack_lvl+0x91/0xf0 [ 30.798033] print_report+0xcc/0x620 [ 30.798521] ? __virt_addr_valid+0x102/0x340 [ 30.799072] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.799719] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.800343] kasan_report+0xbe/0xf0 [ 30.800813] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.801430] vma_interval_tree_remove+0xc75/0xec0 [ 30.802034] vma_prepare+0xc54/0x11a0 [ 30.802519] __split_vma+0x5af/0x950 [ 30.803003] ? __pfx___split_vma+0x10/0x10 [ 30.803550] ? find_held_lock+0x2c/0x110 [ 30.804083] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.804660] ? lock_is_held_type+0x9f/0x120 [ 30.805199] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.805810] ? mtree_range_walk+0x632/0x900 [ 30.806366] ? mas_walk+0x5c7/0x7c0 [ 30.806856] do_vmi_munmap+0x1f1/0x2b0 [ 30.807360] mmap_region+0x1f9/0x2660 [ 30.807881] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.808403] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.809130] ? __pfx_lock_acquire+0x10/0x10 [ 30.809674] ? __pfx_mmap_region+0x10/0x10 [ 30.810212] ? security_mmap_addr+0x7d/0xa0 [ 30.810754] ? get_unmapped_area+0x1f5/0x3f0 [ 30.811320] do_mmap+0x854/0xf00 [ 30.811774] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.812282] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.812852] ksys_mmap_pgoff+0x3af/0x500 [ 30.813372] do_syscall_64+0x3f/0x90 [ 30.813858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.814516] RIP: 0033:0x7f02c723bd82 [ 30.814983] 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 [ 30.817129] RSP: 002b:00007ffefcf07268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.818057] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02c723bd82 [ 30.818915] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02c6675000 [ 30.819796] RBP: 00007f02c6675000 R08: 0000000000000009 R09: 0000000000001000 [ 30.820652] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640d77f3ec0 [ 30.821499] R13: 00007ffefcf07280 R14: 00007ffefcf072b0 R15: 00007ffefcf07610 [ 30.822357] [ 30.822652] [ 30.822868] Allocated by task 211: [ 30.823297] kasan_save_stack+0x22/0x50 [ 30.823821] kasan_set_track+0x25/0x30 [ 30.824317] __kasan_slab_alloc+0x59/0x70 [ 30.824839] kmem_cache_alloc+0x16b/0x370 [ 30.825368] vm_area_dup+0x20/0x160 [ 30.825826] __split_vma+0x170/0x950 [ 30.826292] split_vma+0xc6/0x110 [ 30.826738] mprotect_fixup+0x8d2/0xb30 [ 30.827240] do_mprotect_pkey+0x87e/0xd40 [ 30.827773] __x64_sys_mprotect+0x78/0xc0 [ 30.828301] do_syscall_64+0x3f/0x90 [ 30.828789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.829441] [ 30.829659] Freed by task 19: [ 30.830047] kasan_save_stack+0x22/0x50 [ 30.830557] kasan_set_track+0x25/0x30 [ 30.831052] kasan_save_free_info+0x2b/0x50 [ 30.831607] __kasan_slab_free+0x10a/0x190 [ 30.832152] kmem_cache_free+0x10d/0x4d0 [ 30.832686] rcu_core+0x8c8/0x2860 [ 30.833137] __do_softirq+0x1b7/0x7d4 [ 30.833626] [ 30.833847] Last potentially related work creation: [ 30.834444] kasan_save_stack+0x22/0x50 [ 30.834961] __kasan_record_aux_stack+0x8e/0xa0 [ 30.835562] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.836302] remove_vma+0x139/0x170 [ 30.836768] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.837338] do_vmi_munmap+0x1f1/0x2b0 [ 30.837825] __vm_munmap+0x138/0x3a0 [ 30.838296] __x64_sys_munmap+0x59/0x80 [ 30.838801] do_syscall_64+0x3f/0x90 [ 30.839280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.839941] [ 30.840159] Second to last potentially related work creation: [ 30.840857] kasan_save_stack+0x22/0x50 [ 30.841383] __kasan_record_aux_stack+0x8e/0xa0 [ 30.841961] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.842630] remove_vma+0x139/0x170 [ 30.843097] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.843702] do_vmi_munmap+0x1f1/0x2b0 [ 30.844204] mmap_region+0x1f9/0x2660 [ 30.844680] do_mmap+0x854/0xf00 [ 30.845130] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.845639] ksys_mmap_pgoff+0x3af/0x500 [ 30.846164] do_syscall_64+0x3f/0x90 [ 30.846658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.847331] [ 30.847559] The buggy address belongs to the object at ffff88800d5b0910 [ 30.847559] which belongs to the cache vm_area_struct of size 168 [ 30.849062] The buggy address is located 88 bytes inside of [ 30.849062] freed 168-byte region [ffff88800d5b0910, ffff88800d5b09b8) [ 30.850481] [ 30.850702] The buggy address belongs to the physical page: [ 30.851370] page:00000000ebc10080 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5b0 [ 30.852511] memcg:ffff88800ff79901 [ 30.852937] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.853644] page_type: 0xffffffff() [ 30.854091] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.855011] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff79901 [ 30.855948] page dumped because: kasan: bad access detected [ 30.856618] [ 30.856843] Memory state around the buggy address: [ 30.857464] ffff88800d5b0800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.858328] ffff88800d5b0880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.859208] >ffff88800d5b0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.860062] ^ [ 30.860848] ffff88800d5b0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.861711] ffff88800d5b0a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.862566] ================================================================== [ 30.863501] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.662259] BUG: Bad rss-counter state mm:000000006db20027 type:MM_FILEPAGES val:33 [ 32.662906] BUG: Bad rss-counter state mm:000000006db20027 type:MM_ANONPAGES val:22 [ 33.047684] BUG: Bad rss-counter state mm:00000000627df0ea type:MM_FILEPAGES val:33 [ 33.048356] BUG: Bad rss-counter state mm:00000000627df0ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64176' (ECDSA) to the list of known hosts. 2023/06/21 06:50:26 fuzzer started 2023/06/21 06:50:26 dialing manager at localhost:36067 2023/06/21 06:50:26 checking machine... 2023/06/21 06:50:26 checking revisions... [ 33.820140] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:50:26 testing simple program... [ 33.876526] cgroup: Unknown subsys name 'net' [ 33.939126] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:50:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f6e27c3a010 CR3=000000001598a000 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=2035323a30353a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a30353a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888019c30001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019c2fd01 RSI=ffff888019c2fda0 RDI=ffff888019c2f060 RBP=ffff888019c2f0a8 RSP=ffff888019c2efc8 R8 =0000000000000001 R9 =ffff888019c2f090 R10=0000000000038001 R11=000000000001e427 R12=ffff888019c2f0b0 R13=ffff888019c28000 R14=ffff888019c2fda0 R15=ffff888019c2f050 RIP=ffffffff811304d1 RFL=00000292 [--S-A--] 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 00007fa2f83dd900 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=00007fa2f83bc020 CR3=000000001a0da000 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=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