[ 70.481430] BUG: Bad rss-counter state mm:00000000a77772d7 type:MM_FILEPAGES val:33 [ 70.482672] BUG: Bad rss-counter state mm:00000000a77772d7 type:MM_ANONPAGES val:22 [ 70.642736] ================================================================== [ 70.643822] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.645075] Read of size 8 at addr ffff888010123880 by task sshd/218 [ 70.645866] [ 70.646088] CPU: 0 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 70.647141] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.648124] Call Trace: [ 70.648446] [ 70.648729] dump_stack_lvl+0x91/0xf0 [ 70.649227] print_report+0xcc/0x620 [ 70.649722] ? __virt_addr_valid+0x102/0x340 [ 70.650287] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.650913] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.651534] kasan_report+0xbe/0xf0 [ 70.652011] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.652632] vma_interval_tree_remove+0xc75/0xec0 [ 70.653231] vma_prepare+0xc54/0x11a0 [ 70.653727] __split_vma+0x5af/0x950 [ 70.654201] ? __pfx___split_vma+0x10/0x10 [ 70.654729] ? find_held_lock+0x2c/0x110 [ 70.655249] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.655812] ? lock_is_held_type+0x9f/0x120 [ 70.656346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.656951] ? mtree_range_walk+0x632/0x900 [ 70.657495] ? mas_walk+0x5c7/0x7c0 [ 70.657985] do_vmi_munmap+0x1f1/0x2b0 [ 70.658478] mmap_region+0x1f9/0x2660 [ 70.658958] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.659467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.660179] ? __pfx_lock_acquire+0x10/0x10 [ 70.660705] ? __pfx_mmap_region+0x10/0x10 [ 70.661233] ? security_mmap_addr+0x7d/0xa0 [ 70.661787] ? get_unmapped_area+0x1f5/0x3f0 [ 70.662341] do_mmap+0x854/0xf00 [ 70.662779] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.663272] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.663838] ksys_mmap_pgoff+0x3af/0x500 [ 70.664348] do_syscall_64+0x3f/0x90 [ 70.664831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.665477] RIP: 0033:0x7f77e5e56d82 [ 70.665938] 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 [ 70.668070] RSP: 002b:00007fff1973b0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.668964] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f77e5e56d82 [ 70.669819] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f77e5290000 [ 70.670660] RBP: 00007f77e5290000 R08: 0000000000000009 R09: 0000000000001000 [ 70.671515] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b073daab20 [ 70.672378] R13: 00007fff1973b110 R14: 00007fff1973b140 R15: 00007fff1973b4a0 [ 70.673237] [ 70.673534] [ 70.673767] Allocated by task 211: [ 70.674202] kasan_save_stack+0x22/0x50 [ 70.674704] kasan_set_track+0x25/0x30 [ 70.675195] __kasan_slab_alloc+0x59/0x70 [ 70.675721] kmem_cache_alloc+0x16b/0x370 [ 70.676241] vm_area_dup+0x20/0x160 [ 70.676701] __split_vma+0x170/0x950 [ 70.677165] split_vma+0xc6/0x110 [ 70.677604] mprotect_fixup+0x8d2/0xb30 [ 70.678117] do_mprotect_pkey+0x87e/0xd40 [ 70.678638] __x64_sys_mprotect+0x78/0xc0 [ 70.679159] do_syscall_64+0x3f/0x90 [ 70.679627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.680264] [ 70.680481] Freed by task 211: [ 70.680883] kasan_save_stack+0x22/0x50 [ 70.681407] kasan_set_track+0x25/0x30 [ 70.681927] kasan_save_free_info+0x2b/0x50 [ 70.682467] __kasan_slab_free+0x10a/0x190 [ 70.683005] kmem_cache_free+0x10d/0x4d0 [ 70.683527] rcu_core+0x8c8/0x2860 [ 70.683984] __do_softirq+0x1b7/0x7d4 [ 70.684470] [ 70.684687] Last potentially related work creation: [ 70.685273] kasan_save_stack+0x22/0x50 [ 70.685778] __kasan_record_aux_stack+0x8e/0xa0 [ 70.686352] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.686997] remove_vma+0x139/0x170 [ 70.687449] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.688010] do_vmi_munmap+0x1f1/0x2b0 [ 70.688495] __vm_munmap+0x138/0x3a0 [ 70.688969] __x64_sys_munmap+0x59/0x80 [ 70.689463] do_syscall_64+0x3f/0x90 [ 70.689956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.690598] [ 70.690813] Second to last potentially related work creation: [ 70.691494] kasan_save_stack+0x22/0x50 [ 70.691997] __kasan_record_aux_stack+0x8e/0xa0 [ 70.692571] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.693209] remove_vma+0x139/0x170 [ 70.693658] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.694239] do_vmi_munmap+0x1f1/0x2b0 [ 70.694730] mmap_region+0x1f9/0x2660 [ 70.695212] do_mmap+0x854/0xf00 [ 70.695657] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.696144] ksys_mmap_pgoff+0x7d/0x500 [ 70.696635] do_syscall_64+0x3f/0x90 [ 70.697112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.697781] [ 70.697998] The buggy address belongs to the object at ffff888010123828 [ 70.697998] which belongs to the cache vm_area_struct of size 168 [ 70.699459] The buggy address is located 88 bytes inside of [ 70.699459] freed 168-byte region [ffff888010123828, ffff8880101238d0) [ 70.700855] [ 70.701069] The buggy address belongs to the physical page: [ 70.701751] page:000000004b14e37d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10123 [ 70.702843] memcg:ffff88800d1ad501 [ 70.703277] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 70.703970] page_type: 0xffffffff() [ 70.704423] raw: 0100000000000200 ffff88800879fc80 ffffea00003aac00 dead000000000005 [ 70.705342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1ad501 [ 70.706256] page dumped because: kasan: bad access detected [ 70.706921] [ 70.707135] Memory state around the buggy address: [ 70.707718] ffff888010123780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 70.708579] ffff888010123800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 70.709428] >ffff888010123880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 70.710301] ^ [ 70.710716] ffff888010123900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 70.711571] ffff888010123980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 70.712424] ================================================================== [ 70.713478] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 72.865506] BUG: Bad rss-counter state mm:00000000470ad98d type:MM_FILEPAGES val:33 [ 72.866645] BUG: Bad rss-counter state mm:00000000470ad98d type:MM_ANONPAGES val:22 [ 73.416993] BUG: Bad rss-counter state mm:000000008ebb4cfe type:MM_FILEPAGES val:33 [ 73.418199] BUG: Bad rss-counter state mm:000000008ebb4cfe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57687' (ECDSA) to the list of known hosts. 2023/06/20 05:42:02 fuzzer started 2023/06/20 05:42:02 dialing manager at localhost:44161 2023/06/20 05:42:03 checking machine... 2023/06/20 05:42:03 checking revisions... [ 74.170190] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:42:03 testing simple program... [ 74.215207] cgroup: Unknown subsys name 'net' [ 74.263370] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:41:24 Registers: info registers vcpu 0 RAX=0000000005cd0115 RBX=00000000000000e3 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff846000aa RDI=ffff88801a1baca8 RBP=0000000000000138 RSP=ffff88801bfbfc58 R8 =000000004c650672 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888016343028 R13=0000000000000000 R14=ffff88801a1bac28 R15=ffff88801a1babe0 RIP=ffffffff81847459 RFL=00000286 [--S--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 00007f61ca5d7900 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=00007f61cab8f0b0 CR3=000000000ffe0000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 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=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=0000556d5082b250 CR3=000000000f068000 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=2032303a32343a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a32343a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000