[ 23.949353] BUG: Bad rss-counter state mm:00000000f00d0d2f type:MM_FILEPAGES val:33 [ 23.950671] BUG: Bad rss-counter state mm:00000000f00d0d2f type:MM_ANONPAGES val:22 [ 24.147468] ================================================================== [ 24.148432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.149385] Read of size 8 at addr ffff88801a33ba50 by task sshd/219 [ 24.150342] [ 24.150564] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.151472] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.152478] Call Trace: [ 24.152804] [ 24.153099] dump_stack_lvl+0x91/0xf0 [ 24.153601] print_report+0xcc/0x620 [ 24.154090] ? __virt_addr_valid+0x102/0x340 [ 24.154658] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.155302] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.155921] kasan_report+0xbe/0xf0 [ 24.156413] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.157055] vma_interval_tree_remove+0xc75/0xec0 [ 24.157672] vma_prepare+0xc54/0x11a0 [ 24.158160] __split_vma+0x5af/0x950 [ 24.158645] ? __pfx___split_vma+0x10/0x10 [ 24.159178] ? find_held_lock+0x2c/0x110 [ 24.159720] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.160306] ? lock_is_held_type+0x9f/0x120 [ 24.160847] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.161470] ? mtree_range_walk+0x632/0x900 [ 24.162037] ? mas_walk+0x5c7/0x7c0 [ 24.162520] do_vmi_munmap+0x1f1/0x2b0 [ 24.163027] mmap_region+0x1f9/0x2660 [ 24.163541] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.164063] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.164789] ? __pfx_lock_acquire+0x10/0x10 [ 24.165332] ? __pfx_mmap_region+0x10/0x10 [ 24.165870] ? security_mmap_addr+0x7d/0xa0 [ 24.166415] ? get_unmapped_area+0x1f5/0x3f0 [ 24.166981] do_mmap+0x854/0xf00 [ 24.167451] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.167963] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.168532] ksys_mmap_pgoff+0x3af/0x500 [ 24.169047] do_syscall_64+0x3f/0x90 [ 24.169538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.170207] RIP: 0033:0x7f00aa36dd82 [ 24.170675] 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 [ 24.172858] RSP: 002b:00007ffce81eb478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.173782] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f00aa36dd82 [ 24.174645] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f00a97a7000 [ 24.175519] RBP: 00007f00a97a7000 R08: 0000000000000009 R09: 0000000000001000 [ 24.176395] R10: 0000000000000812 R11: 0000000000000206 R12: 000055772b175d90 [ 24.177251] R13: 00007ffce81eb490 R14: 00007ffce81eb4c0 R15: 00007ffce81eb820 [ 24.178117] [ 24.178419] [ 24.178635] Allocated by task 206: [ 24.179068] kasan_save_stack+0x22/0x50 [ 24.179596] kasan_set_track+0x25/0x30 [ 24.180089] __kasan_slab_alloc+0x59/0x70 [ 24.180617] kmem_cache_alloc+0x16b/0x370 [ 24.181140] vm_area_dup+0x20/0x160 [ 24.181597] __split_vma+0x170/0x950 [ 24.182068] split_vma+0xc6/0x110 [ 24.182517] mprotect_fixup+0x8d2/0xb30 [ 24.183017] do_mprotect_pkey+0x87e/0xd40 [ 24.183563] __x64_sys_mprotect+0x78/0xc0 [ 24.184088] do_syscall_64+0x3f/0x90 [ 24.184575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.185225] [ 24.185440] Freed by task 205: [ 24.185836] kasan_save_stack+0x22/0x50 [ 24.186343] kasan_set_track+0x25/0x30 [ 24.186837] kasan_save_free_info+0x2b/0x50 [ 24.187405] __kasan_slab_free+0x10a/0x190 [ 24.187944] kmem_cache_free+0x10d/0x4d0 [ 24.188453] rcu_core+0x8c8/0x2860 [ 24.188908] __do_softirq+0x1b7/0x7d4 [ 24.189391] [ 24.189610] Last potentially related work creation: [ 24.190198] kasan_save_stack+0x22/0x50 [ 24.190704] __kasan_record_aux_stack+0x8e/0xa0 [ 24.191287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.192217] remove_vma+0x139/0x170 [ 24.192779] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.193465] do_vmi_munmap+0x1f1/0x2b0 [ 24.194061] __vm_munmap+0x138/0x3a0 [ 24.194636] __x64_sys_munmap+0x59/0x80 [ 24.195247] do_syscall_64+0x3f/0x90 [ 24.195855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.196638] [ 24.196903] The buggy address belongs to the object at ffff88801a33b9f8 [ 24.196903] which belongs to the cache vm_area_struct of size 168 [ 24.198707] The buggy address is located 88 bytes inside of [ 24.198707] freed 168-byte region [ffff88801a33b9f8, ffff88801a33baa0) [ 24.200460] [ 24.200724] The buggy address belongs to the physical page: [ 24.201555] page:000000004232b1b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a33b [ 24.202905] memcg:ffff88801a30ca01 [ 24.203469] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.204253] page_type: 0xffffffff() [ 24.204709] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.205668] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a30ca01 [ 24.206613] page dumped because: kasan: bad access detected [ 24.207327] [ 24.207549] Memory state around the buggy address: [ 24.208166] ffff88801a33b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.209052] ffff88801a33b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.209929] >ffff88801a33ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.210789] ^ [ 24.211499] ffff88801a33ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.212352] ffff88801a33bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.213206] ================================================================== [ 24.214154] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.071768] BUG: Bad rss-counter state mm:000000009e7f713c type:MM_FILEPAGES val:33 [ 26.072936] BUG: Bad rss-counter state mm:000000009e7f713c type:MM_ANONPAGES val:22 [ 26.466090] BUG: Bad rss-counter state mm:00000000cb34a297 type:MM_FILEPAGES val:33 [ 26.467270] BUG: Bad rss-counter state mm:00000000cb34a297 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32793' (ECDSA) to the list of known hosts. 2023/06/20 18:35:04 fuzzer started 2023/06/20 18:35:04 dialing manager at localhost:36067 2023/06/20 18:35:04 checking machine... 2023/06/20 18:35:04 checking revisions... [ 27.216239] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:35:04 testing simple program... [ 27.254912] cgroup: Unknown subsys name 'net' [ 27.310616] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:35:04 Registers: info registers vcpu 0 RAX=00000000e2f1a272 RBX=00000000f57e248a RCX=ffff888016d77670 RDX=000000000000000d RSI=0000000000000014 RDI=00000000c08e5d37 RBP=0000000000000000 RSP=ffff888016d775f0 R8 =00000000df6c1322 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff888016d77658 R15=000000000000000d RIP=ffffffff82270463 RFL=00000287 [--S--PC] 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 00007fee4dac6900 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=00007fff1d643000 CR3=000000001a134000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f62befa99f0 CR3=000000001031a000 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=2034303a35333a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a35333a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000