[ 33.073047] BUG: Bad rss-counter state mm:0000000042c3b9ed type:MM_FILEPAGES val:33 [ 33.074232] BUG: Bad rss-counter state mm:0000000042c3b9ed type:MM_ANONPAGES val:22 [ 33.226916] ================================================================== [ 33.227826] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.228794] Read of size 8 at addr ffff88801b448df0 by task sshd/218 [ 33.229574] [ 33.229792] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.230659] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.231656] Call Trace: [ 33.231982] [ 33.232268] dump_stack_lvl+0x91/0xf0 [ 33.232783] print_report+0xcc/0x620 [ 33.233271] ? __virt_addr_valid+0x102/0x340 [ 33.233818] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.234437] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.235059] kasan_report+0xbe/0xf0 [ 33.235540] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.236164] vma_interval_tree_remove+0xc75/0xec0 [ 33.236791] vma_prepare+0xc54/0x11a0 [ 33.237266] __split_vma+0x5af/0x950 [ 33.237744] ? __pfx___split_vma+0x10/0x10 [ 33.238267] ? find_held_lock+0x2c/0x110 [ 33.238793] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.239355] ? lock_is_held_type+0x9f/0x120 [ 33.239898] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.240507] ? mtree_range_walk+0x632/0x900 [ 33.241069] ? mas_walk+0x5c7/0x7c0 [ 33.241548] do_vmi_munmap+0x1f1/0x2b0 [ 33.242040] mmap_region+0x1f9/0x2660 [ 33.242520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.243029] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.243754] ? __pfx_lock_acquire+0x10/0x10 [ 33.244293] ? __pfx_mmap_region+0x10/0x10 [ 33.244843] ? security_mmap_addr+0x7d/0xa0 [ 33.245384] ? get_unmapped_area+0x1f5/0x3f0 [ 33.245930] do_mmap+0x854/0xf00 [ 33.246371] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.246869] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.247443] ksys_mmap_pgoff+0x3af/0x500 [ 33.247957] do_syscall_64+0x3f/0x90 [ 33.248447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.249128] RIP: 0033:0x7fcc7a772d82 [ 33.249596] 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 [ 33.251728] RSP: 002b:00007ffea5901628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.252645] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc7a772d82 [ 33.253514] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc79bac000 [ 33.254372] RBP: 00007fcc79bac000 R08: 0000000000000009 R09: 0000000000001000 [ 33.255241] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620df37db20 [ 33.256088] R13: 00007ffea5901640 R14: 00007ffea5901670 R15: 00007ffea59019d0 [ 33.256966] [ 33.257259] [ 33.257477] Allocated by task 206: [ 33.257904] kasan_save_stack+0x22/0x50 [ 33.258416] kasan_set_track+0x25/0x30 [ 33.258908] __kasan_slab_alloc+0x59/0x70 [ 33.259437] kmem_cache_alloc+0x16b/0x370 [ 33.259955] vm_area_dup+0x20/0x160 [ 33.260407] __split_vma+0x170/0x950 [ 33.260882] split_vma+0xc6/0x110 [ 33.261323] mprotect_fixup+0x8d2/0xb30 [ 33.261829] do_mprotect_pkey+0x87e/0xd40 [ 33.262363] __x64_sys_mprotect+0x78/0xc0 [ 33.262890] do_syscall_64+0x3f/0x90 [ 33.263367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.264008] [ 33.264225] Freed by task 206: [ 33.264620] kasan_save_stack+0x22/0x50 [ 33.265147] kasan_set_track+0x25/0x30 [ 33.265650] kasan_save_free_info+0x2b/0x50 [ 33.266181] __kasan_slab_free+0x10a/0x190 [ 33.266717] kmem_cache_free+0x10d/0x4d0 [ 33.267224] rcu_core+0x8c8/0x2860 [ 33.267669] __do_softirq+0x1b7/0x7d4 [ 33.268148] [ 33.268367] Last potentially related work creation: [ 33.268959] kasan_save_stack+0x22/0x50 [ 33.269464] __kasan_record_aux_stack+0x8e/0xa0 [ 33.270046] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.270695] remove_vma+0x139/0x170 [ 33.271148] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.271711] do_vmi_munmap+0x1f1/0x2b0 [ 33.272199] __vm_munmap+0x138/0x3a0 [ 33.272670] __x64_sys_munmap+0x59/0x80 [ 33.273196] do_syscall_64+0x3f/0x90 [ 33.273679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.274325] [ 33.274542] The buggy address belongs to the object at ffff88801b448d98 [ 33.274542] which belongs to the cache vm_area_struct of size 168 [ 33.276013] The buggy address is located 88 bytes inside of [ 33.276013] freed 168-byte region [ffff88801b448d98, ffff88801b448e40) [ 33.277448] [ 33.277665] The buggy address belongs to the physical page: [ 33.278332] page:00000000df984609 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b448 [ 33.279430] memcg:ffff88801b43c201 [ 33.279855] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.280513] page_type: 0xffffffff() [ 33.280986] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.281907] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b43c201 [ 33.282813] page dumped because: kasan: bad access detected [ 33.283483] [ 33.283700] Memory state around the buggy address: [ 33.284277] ffff88801b448c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.285169] ffff88801b448d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.286023] >ffff88801b448d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.286879] ^ [ 33.287709] ffff88801b448e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.288564] ffff88801b448e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.289432] ================================================================== [ 33.290610] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.060886] BUG: Bad rss-counter state mm:000000000038855b type:MM_FILEPAGES val:33 [ 36.061930] BUG: Bad rss-counter state mm:000000000038855b type:MM_ANONPAGES val:22 [ 36.605497] BUG: Bad rss-counter state mm:000000008ca36d05 type:MM_FILEPAGES val:33 [ 36.606672] BUG: Bad rss-counter state mm:000000008ca36d05 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35530' (ECDSA) to the list of known hosts. 2023/06/20 02:04:06 fuzzer started 2023/06/20 02:04:06 dialing manager at localhost:44161 2023/06/20 02:04:06 checking machine... 2023/06/20 02:04:06 checking revisions... [ 37.254663] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:04:06 testing simple program... [ 37.347840] cgroup: Unknown subsys name 'net' [ 37.449961] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:03:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff88800dad0000 RSI=ffffffff848ab420 RDI=0000000000000002 RBP=0000000000000000 RSP=ffff88800dacfed8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=00000000000000ba R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c03e6 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 00007ff1bd240900 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=00007ff1bc6b9c40 CR3=000000000c6b0000 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=7e8a42789393c4b7000000000011c520 XMM01=28f1f955d366c0a3ee4a44e4b750f13a XMM02=2c67c8bc2e329bc3000000000011c7f8 XMM03=fb795ef6d65770560000000000123648 XMM04=ac608b7b3b7525e500000000000ae988 XMM05=751b9502027dc0b90000000000133158 XMM06=be029d28ef1c5cfa00000000001318f8 XMM07=e042d86d42eb936e0000000000123920 XMM08=bc5c3b4c3d5f4cb7000000000011c858 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffecfb38688 CR3=000000001a1e2000 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=2035303a34303a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a34303a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000