[ 23.682251] BUG: Bad rss-counter state mm:00000000710a47ab type:MM_FILEPAGES val:33 [ 23.683279] BUG: Bad rss-counter state mm:00000000710a47ab type:MM_ANONPAGES val:22 [ 23.840261] ================================================================== [ 23.841364] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.842514] Read of size 8 at addr ffff88800def3df0 by task sshd/219 [ 23.843613] [ 23.843882] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.844840] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.845860] Call Trace: [ 23.846181] [ 23.846462] dump_stack_lvl+0x91/0xf0 [ 23.846964] print_report+0xcc/0x620 [ 23.847454] ? __virt_addr_valid+0x102/0x340 [ 23.848027] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.848663] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.849295] kasan_report+0xbe/0xf0 [ 23.849778] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.850420] vma_interval_tree_remove+0xc75/0xec0 [ 23.851025] vma_prepare+0xc54/0x11a0 [ 23.851499] __split_vma+0x5af/0x950 [ 23.851980] ? __pfx___split_vma+0x10/0x10 [ 23.852500] ? find_held_lock+0x2c/0x110 [ 23.853055] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.853647] ? lock_is_held_type+0x9f/0x120 [ 23.854201] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.854823] ? mtree_range_walk+0x632/0x900 [ 23.855384] ? mas_walk+0x5c7/0x7c0 [ 23.855867] do_vmi_munmap+0x1f1/0x2b0 [ 23.856389] mmap_region+0x1f9/0x2660 [ 23.856880] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.857417] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.858161] ? __pfx_lock_acquire+0x10/0x10 [ 23.858700] ? __pfx_mmap_region+0x10/0x10 [ 23.859239] ? security_mmap_addr+0x7d/0xa0 [ 23.859780] ? get_unmapped_area+0x1f5/0x3f0 [ 23.860359] do_mmap+0x854/0xf00 [ 23.860808] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.861313] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.861878] ksys_mmap_pgoff+0x3af/0x500 [ 23.862389] do_syscall_64+0x3f/0x90 [ 23.862878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.863527] RIP: 0033:0x7f5e67bc1d82 [ 23.864000] 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 [ 23.866164] RSP: 002b:00007ffc0a813728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.867077] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e67bc1d82 [ 23.867956] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e66ffb000 [ 23.868830] RBP: 00007f5e66ffb000 R08: 0000000000000009 R09: 0000000000001000 [ 23.869688] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558fea262ec0 [ 23.870556] R13: 00007ffc0a813740 R14: 00007ffc0a813770 R15: 00007ffc0a813ad0 [ 23.871423] [ 23.871717] [ 23.871945] Allocated by task 212: [ 23.872382] kasan_save_stack+0x22/0x50 [ 23.872901] kasan_set_track+0x25/0x30 [ 23.873404] __kasan_slab_alloc+0x59/0x70 [ 23.873943] kmem_cache_alloc+0x16b/0x370 [ 23.874466] vm_area_dup+0x20/0x160 [ 23.874931] __split_vma+0x170/0x950 [ 23.875410] split_vma+0xc6/0x110 [ 23.875855] mprotect_fixup+0x8d2/0xb30 [ 23.876387] do_mprotect_pkey+0x87e/0xd40 [ 23.876915] __x64_sys_mprotect+0x78/0xc0 [ 23.877446] do_syscall_64+0x3f/0x90 [ 23.877930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.878584] [ 23.878800] Freed by task 212: [ 23.879193] kasan_save_stack+0x22/0x50 [ 23.879704] kasan_set_track+0x25/0x30 [ 23.880216] kasan_save_free_info+0x2b/0x50 [ 23.880750] __kasan_slab_free+0x10a/0x190 [ 23.881294] kmem_cache_free+0x10d/0x4d0 [ 23.881818] rcu_core+0x8c8/0x2860 [ 23.882270] __do_softirq+0x1b7/0x7d4 [ 23.882759] [ 23.882975] Last potentially related work creation: [ 23.883569] kasan_save_stack+0x22/0x50 [ 23.884111] __kasan_record_aux_stack+0x8e/0xa0 [ 23.884734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.885415] remove_vma+0x139/0x170 [ 23.885884] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.886477] do_vmi_munmap+0x1f1/0x2b0 [ 23.886968] __vm_munmap+0x138/0x3a0 [ 23.887460] __x64_sys_munmap+0x59/0x80 [ 23.887976] do_syscall_64+0x3f/0x90 [ 23.888460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.889123] [ 23.889346] Second to last potentially related work creation: [ 23.890007] kasan_save_stack+0x22/0x50 [ 23.890495] __kasan_record_aux_stack+0x8e/0xa0 [ 23.891048] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.891667] remove_vma+0x139/0x170 [ 23.892111] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.892655] do_vmi_munmap+0x1f1/0x2b0 [ 23.893124] mmap_region+0x1f9/0x2660 [ 23.893585] do_mmap+0x854/0xf00 [ 23.894003] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.894477] ksys_mmap_pgoff+0x3af/0x500 [ 23.894969] do_syscall_64+0x3f/0x90 [ 23.895444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.896091] [ 23.896305] The buggy address belongs to the object at ffff88800def3d98 [ 23.896305] which belongs to the cache vm_area_struct of size 168 [ 23.897715] The buggy address is located 88 bytes inside of [ 23.897715] freed 168-byte region [ffff88800def3d98, ffff88800def3e40) [ 23.899049] [ 23.899255] The buggy address belongs to the physical page: [ 23.899921] page:000000009c395dda refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdef3 [ 23.901002] memcg:ffff88800de2fd01 [ 23.901422] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.902052] page_type: 0xffffffff() [ 23.902487] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.903358] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de2fd01 [ 23.904232] page dumped because: kasan: bad access detected [ 23.904888] [ 23.905099] Memory state around the buggy address: [ 23.905664] ffff88800def3c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 23.906509] ffff88800def3d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 23.907345] >ffff88800def3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 23.908185] ^ [ 23.908975] ffff88800def3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 23.909822] ffff88800def3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.910674] ================================================================== [ 23.911795] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.917491] BUG: Bad rss-counter state mm:000000000db8b079 type:MM_FILEPAGES val:33 [ 25.918520] BUG: Bad rss-counter state mm:000000000db8b079 type:MM_ANONPAGES val:22 [ 26.350673] BUG: Bad rss-counter state mm:00000000f7a9e508 type:MM_FILEPAGES val:33 [ 26.351814] BUG: Bad rss-counter state mm:00000000f7a9e508 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51823' (ECDSA) to the list of known hosts. 2023/06/20 13:01:11 fuzzer started 2023/06/20 13:01:11 dialing manager at localhost:36067 2023/06/20 13:01:11 checking machine... 2023/06/20 13:01:11 checking revisions... [ 27.006198] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:01:11 testing simple program... [ 27.049918] cgroup: Unknown subsys name 'net' [ 27.099141] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:01:10 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888018da6000 RCX=0000000000000000 RDX=ffff88800b840000 RSI=ffffffff8387177c RDI=ffff888018da6000 RBP=0000000000000000 RSP=ffff8880168bfb10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=dffffc0000000000 R13=0000000000000000 R14=ffff88800f756b40 R15=ffff88800f756b40 RIP=ffffffff814c0880 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 00007fa01f375900 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=00007fa01f92c618 CR3=000000000eb04000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=000055fad212f7e0 CR3=0000000008edc000 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=7465677261742e79636e656772656d65 XMM02=ffffffffffffffffffffffffff0f0e0d XMM03=00656369767265732e6c6c696b66722d XMM04=2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e XMM05=000055fad2151510000055fad21ceee0 XMM06=00000000000000510000000000000000 XMM07=00000000000000000000000000000000 XMM08=746c75616665640073646e6f63657300 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000