[ 24.045327] BUG: Bad rss-counter state mm:00000000fc51e892 type:MM_FILEPAGES val:33 [ 24.046592] BUG: Bad rss-counter state mm:00000000fc51e892 type:MM_ANONPAGES val:22 [ 24.088475] ================================================================== [ 24.089425] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.090389] Read of size 8 at addr ffff88800ed1b968 by task sshd/220 [ 24.091172] [ 24.091398] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.092277] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.093280] Call Trace: [ 24.093604] [ 24.093900] dump_stack_lvl+0x91/0xf0 [ 24.094402] print_report+0xcc/0x620 [ 24.094910] ? __virt_addr_valid+0x102/0x340 [ 24.095478] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.096099] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.096716] kasan_report+0xbe/0xf0 [ 24.097196] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.097829] vma_interval_tree_remove+0xc75/0xec0 [ 24.098434] vma_prepare+0xc54/0x11a0 [ 24.098933] __split_vma+0x5af/0x950 [ 24.099415] ? __pfx___split_vma+0x10/0x10 [ 24.099949] ? find_held_lock+0x2c/0x110 [ 24.100474] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.101052] ? lock_is_held_type+0x9f/0x120 [ 24.101592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.102203] ? mtree_range_walk+0x632/0x900 [ 24.102763] ? mas_walk+0x5c7/0x7c0 [ 24.103240] do_vmi_munmap+0x1f1/0x2b0 [ 24.103735] mmap_region+0x1f9/0x2660 [ 24.104221] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.104737] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.105457] ? __pfx_lock_acquire+0x10/0x10 [ 24.105995] ? __pfx_mmap_region+0x10/0x10 [ 24.106530] ? security_mmap_addr+0x7d/0xa0 [ 24.107089] ? get_unmapped_area+0x1f5/0x3f0 [ 24.107645] do_mmap+0x854/0xf00 [ 24.108090] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.108587] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.109151] ksys_mmap_pgoff+0x3af/0x500 [ 24.109661] do_syscall_64+0x3f/0x90 [ 24.110144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.110800] RIP: 0033:0x7ff69e2a7d82 [ 24.111263] 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 [ 24.113426] RSP: 002b:00007ffe8949cc98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.114345] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff69e2a7d82 [ 24.115214] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff69d6e1000 [ 24.116071] RBP: 00007ff69d6e1000 R08: 0000000000000009 R09: 0000000000001000 [ 24.116934] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a70abf0d90 [ 24.117797] R13: 00007ffe8949ccb0 R14: 00007ffe8949cce0 R15: 00007ffe8949d040 [ 24.118663] [ 24.118977] [ 24.119199] Allocated by task 212: [ 24.119630] kasan_save_stack+0x22/0x50 [ 24.120142] kasan_set_track+0x25/0x30 [ 24.120640] __kasan_slab_alloc+0x59/0x70 [ 24.121177] kmem_cache_alloc+0x16b/0x370 [ 24.121695] vm_area_dup+0x20/0x160 [ 24.122154] __split_vma+0x170/0x950 [ 24.122624] split_vma+0xc6/0x110 [ 24.123077] mprotect_fixup+0x8d2/0xb30 [ 24.123587] do_mprotect_pkey+0x87e/0xd40 [ 24.124118] __x64_sys_mprotect+0x78/0xc0 [ 24.124655] do_syscall_64+0x3f/0x90 [ 24.125148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.125804] [ 24.126024] Freed by task 212: [ 24.126426] kasan_save_stack+0x22/0x50 [ 24.126960] kasan_set_track+0x25/0x30 [ 24.127579] kasan_save_free_info+0x2b/0x50 [ 24.128140] __kasan_slab_free+0x10a/0x190 [ 24.128685] kmem_cache_free+0x10d/0x4d0 [ 24.129195] rcu_core+0x8c8/0x2860 [ 24.129653] __do_softirq+0x1b7/0x7d4 [ 24.130151] [ 24.130374] Last potentially related work creation: [ 24.130986] kasan_save_stack+0x22/0x50 [ 24.131505] __kasan_record_aux_stack+0x8e/0xa0 [ 24.132102] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.132760] remove_vma+0x139/0x170 [ 24.133219] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.133855] do_vmi_munmap+0x1f1/0x2b0 [ 24.134352] __vm_munmap+0x138/0x3a0 [ 24.134848] __x64_sys_munmap+0x59/0x80 [ 24.135373] do_syscall_64+0x3f/0x90 [ 24.135864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.136528] [ 24.136762] Second to last potentially related work creation: [ 24.137475] kasan_save_stack+0x22/0x50 [ 24.137991] __kasan_record_aux_stack+0x8e/0xa0 [ 24.138574] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.139261] remove_vma+0x139/0x170 [ 24.139723] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.140294] do_vmi_munmap+0x1f1/0x2b0 [ 24.140798] mmap_region+0x1f9/0x2660 [ 24.141286] do_mmap+0x854/0xf00 [ 24.141724] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.142223] ksys_mmap_pgoff+0x3af/0x500 [ 24.142755] do_syscall_64+0x3f/0x90 [ 24.143239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.143905] [ 24.144132] The buggy address belongs to the object at ffff88800ed1b910 [ 24.144132] which belongs to the cache vm_area_struct of size 168 [ 24.145677] The buggy address is located 88 bytes inside of [ 24.145677] freed 168-byte region [ffff88800ed1b910, ffff88800ed1b9b8) [ 24.147152] [ 24.147374] The buggy address belongs to the physical page: [ 24.148060] page:000000003ec08abf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed1b [ 24.149182] memcg:ffff88800eb01b01 [ 24.149621] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.150352] page_type: 0xffffffff() [ 24.150830] raw: 0100000000000200 ffff88800879fc80 ffffea00003bb0c0 dead000000000007 [ 24.151793] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb01b01 [ 24.152739] page dumped because: kasan: bad access detected [ 24.153441] [ 24.153662] Memory state around the buggy address: [ 24.154268] ffff88800ed1b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.155181] ffff88800ed1b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.156061] >ffff88800ed1b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.156955] ^ [ 24.157749] ffff88800ed1b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.158629] ffff88800ed1ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.159515] ================================================================== [ 24.160522] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.099797] BUG: Bad rss-counter state mm:00000000a822dae5 type:MM_FILEPAGES val:33 [ 26.100864] BUG: Bad rss-counter state mm:00000000a822dae5 type:MM_ANONPAGES val:22 [ 26.556835] BUG: Bad rss-counter state mm:0000000083860372 type:MM_FILEPAGES val:33 [ 26.558697] BUG: Bad rss-counter state mm:0000000083860372 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62913' (ECDSA) to the list of known hosts. 2023/06/19 17:17:24 fuzzer started 2023/06/19 17:17:24 dialing manager at localhost:44161 2023/06/19 17:17:24 checking machine... 2023/06/19 17:17:24 checking revisions... [ 27.322273] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:17:24 testing simple program... [ 27.379915] cgroup: Unknown subsys name 'net' [ 27.457452] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:17:23 Registers: info registers vcpu 0 RAX=1ffff11001e46b8f RBX=ffff88800f235c48 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800f235c78 RBP=ffff888019a91cb0 RSP=ffff88800e3efd18 R8 =0000000000000001 R9 =ffffed1001c7df97 R10=0000000000000003 R11=00000000000b6cb2 R12=dffffc0000000000 R13=ffff888019a9c000 R14=ffffffff813782a8 R15=ffff888019a9c000 RIP=ffffffff81846362 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa8f5296900 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=000055e25ac21734 CR3=000000000cbde000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffea00006cae80 RCX=ffffffff81b47f49 RDX=0000000000000000 RSI=0000000000000002 RDI=0000000000000005 RBP=ffff888018fbca30 RSP=ffff88800ef6fa58 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000000 R11=736573203a296e6f R12=000000000000005a R13=000000000000005a R14=0000000000000001 R15=0000000000000000 RIP=ffffffff814c01d0 RFL=00000293 [--S-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 00007ff06acf9700 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=00007ffc4d8a52f8 CR3=00000000169ca000 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=2033323a37313a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a37313a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000