[ 31.261955] BUG: Bad rss-counter state mm:00000000c75bb508 type:MM_FILEPAGES val:33 [ 31.263245] BUG: Bad rss-counter state mm:00000000c75bb508 type:MM_ANONPAGES val:22 [ 31.411724] ================================================================== [ 31.412628] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.413561] Read of size 8 at addr ffff88800c5785c8 by task sshd/220 [ 31.414325] [ 31.414540] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.415573] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.416545] Call Trace: [ 31.416865] [ 31.417152] dump_stack_lvl+0x91/0xf0 [ 31.417642] print_report+0xcc/0x620 [ 31.418124] ? __virt_addr_valid+0x102/0x340 [ 31.418673] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.419288] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.419921] kasan_report+0xbe/0xf0 [ 31.420396] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.421016] vma_interval_tree_remove+0xc75/0xec0 [ 31.421619] vma_prepare+0xc54/0x11a0 [ 31.422091] __split_vma+0x5af/0x950 [ 31.422568] ? __pfx___split_vma+0x10/0x10 [ 31.423098] ? find_held_lock+0x2c/0x110 [ 31.423625] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.424191] ? lock_is_held_type+0x9f/0x120 [ 31.424733] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.425339] ? mtree_range_walk+0x632/0x900 [ 31.425905] ? mas_walk+0x5c7/0x7c0 [ 31.426382] do_vmi_munmap+0x1f1/0x2b0 [ 31.426873] mmap_region+0x1f9/0x2660 [ 31.427361] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.427894] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.428610] ? __pfx_lock_acquire+0x10/0x10 [ 31.429183] ? __pfx_mmap_region+0x10/0x10 [ 31.429707] ? security_mmap_addr+0x7d/0xa0 [ 31.430242] ? get_unmapped_area+0x1f5/0x3f0 [ 31.430798] do_mmap+0x854/0xf00 [ 31.431242] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.431766] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.432338] ksys_mmap_pgoff+0x3af/0x500 [ 31.432851] do_syscall_64+0x3f/0x90 [ 31.433340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.433994] RIP: 0033:0x7faa516c0d82 [ 31.434465] 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 [ 31.436643] RSP: 002b:00007ffdf91726c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.437559] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa516c0d82 [ 31.438426] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa50afa000 [ 31.439273] RBP: 00007faa50afa000 R08: 0000000000000009 R09: 0000000000001000 [ 31.440138] R10: 0000000000000812 R11: 0000000000000206 R12: 000056194367af70 [ 31.440973] R13: 00007ffdf91726e0 R14: 00007ffdf9172710 R15: 00007ffdf9172a70 [ 31.441837] [ 31.442132] [ 31.442344] Allocated by task 213: [ 31.442770] kasan_save_stack+0x22/0x50 [ 31.443286] kasan_set_track+0x25/0x30 [ 31.443801] __kasan_slab_alloc+0x59/0x70 [ 31.444325] kmem_cache_alloc+0x16b/0x370 [ 31.444845] vm_area_dup+0x20/0x160 [ 31.445298] __split_vma+0x170/0x950 [ 31.445771] split_vma+0xc6/0x110 [ 31.446213] mprotect_fixup+0x8d2/0xb30 [ 31.446728] do_mprotect_pkey+0x87e/0xd40 [ 31.447266] __x64_sys_mprotect+0x78/0xc0 [ 31.447813] do_syscall_64+0x3f/0x90 [ 31.448298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.448950] [ 31.449167] Freed by task 213: [ 31.449558] kasan_save_stack+0x22/0x50 [ 31.450067] kasan_set_track+0x25/0x30 [ 31.450563] kasan_save_free_info+0x2b/0x50 [ 31.451102] __kasan_slab_free+0x10a/0x190 [ 31.451645] kmem_cache_free+0x10d/0x4d0 [ 31.452151] rcu_core+0x8c8/0x2860 [ 31.452599] __do_softirq+0x1b7/0x7d4 [ 31.453082] [ 31.453300] Last potentially related work creation: [ 31.453893] kasan_save_stack+0x22/0x50 [ 31.454406] __kasan_record_aux_stack+0x8e/0xa0 [ 31.454986] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.455646] remove_vma+0x139/0x170 [ 31.456109] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.456737] do_vmi_munmap+0x1f1/0x2b0 [ 31.457229] __vm_munmap+0x138/0x3a0 [ 31.457702] __x64_sys_munmap+0x59/0x80 [ 31.458205] do_syscall_64+0x3f/0x90 [ 31.458697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.459347] [ 31.459572] Second to last potentially related work creation: [ 31.460261] kasan_save_stack+0x22/0x50 [ 31.460761] __kasan_record_aux_stack+0x8e/0xa0 [ 31.461347] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.461988] remove_vma+0x139/0x170 [ 31.462446] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.463001] do_vmi_munmap+0x1f1/0x2b0 [ 31.463502] mmap_region+0x1f9/0x2660 [ 31.463982] do_mmap+0x854/0xf00 [ 31.464417] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.464911] ksys_mmap_pgoff+0x3af/0x500 [ 31.465412] do_syscall_64+0x3f/0x90 [ 31.465897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.466539] [ 31.466756] The buggy address belongs to the object at ffff88800c578570 [ 31.466756] which belongs to the cache vm_area_struct of size 168 [ 31.468235] The buggy address is located 88 bytes inside of [ 31.468235] freed 168-byte region [ffff88800c578570, ffff88800c578618) [ 31.469652] [ 31.469871] The buggy address belongs to the physical page: [ 31.470538] page:000000007bcea76e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc578 [ 31.471644] memcg:ffff88800e45de01 [ 31.472065] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.472703] page_type: 0xffffffff() [ 31.473149] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.474063] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e45de01 [ 31.474966] page dumped because: kasan: bad access detected [ 31.475649] [ 31.475862] Memory state around the buggy address: [ 31.476445] ffff88800c578480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.477293] ffff88800c578500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.478138] >ffff88800c578580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.478983] ^ [ 31.479658] ffff88800c578600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.480552] ffff88800c578680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.481439] ================================================================== [ 31.482400] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.408631] BUG: Bad rss-counter state mm:00000000a97a546e type:MM_FILEPAGES val:33 [ 34.409926] BUG: Bad rss-counter state mm:00000000a97a546e type:MM_ANONPAGES val:22 [ 34.917348] BUG: Bad rss-counter state mm:00000000d5f76abd type:MM_FILEPAGES val:33 [ 34.918674] BUG: Bad rss-counter state mm:00000000d5f76abd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16985' (ECDSA) to the list of known hosts. 2023/06/20 13:06:07 fuzzer started 2023/06/20 13:06:07 dialing manager at localhost:36067 2023/06/20 13:06:07 checking machine... 2023/06/20 13:06:07 checking revisions... [ 35.574819] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:06:08 testing simple program... [ 35.624376] cgroup: Unknown subsys name 'net' [ 35.673142] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:06:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea0000271540 RCX=0000000000000000 RDX=ffff88800844f780 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff8880147578c0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=ffffffff81845e00 R13=ffffea00003cbfc0 R14=ffffffff8366b8df R15=ffff88800de38580 RIP=ffffffff8180c61b RFL=00000282 [--S----] 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 00007f8273cd0900 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=00007fa5fb761650 CR3=000000000c6b4000 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=c6b3d52832300baeb648eb739d87ec9f XMM02=000000000011b008eff9b2d0a8fce9cb XMM03=000000000011b0d82c67c8bc2e329bc3 XMM04=34b56a325d64432d00000000000ae988 XMM05=ccf627ae00d855000000000000133e20 XMM06=a16174c3965b6e9c0000000000132850 XMM07=fb795ef6d65770560000000000121a18 XMM08=2c67c8bc2e329bc3000000000011b078 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000296 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff888018baac80 RBP=ffffffff84535ffc RSP=ffff88800f47fa40 R8 =0000000000000000 R9 =ffffed1003175590 R10=ffff888018baac83 R11=0000000000000128 R12=ffff888018baac78 R13=ffff888018baae01 R14=0000000000000001 R15=ffff888018baac80 RIP=ffffffff815342b7 RFL=00000002 [-------] 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=00007fa5fb0b8000 CR3=0000000005482000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f29ac8cfc71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=000000000000726f7475636578652d7a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000