syzkaller login: [ 151.158479] BUG: Bad rss-counter state mm:00000000273551a0 type:MM_FILEPAGES val:33 [ 151.159509] BUG: Bad rss-counter state mm:00000000273551a0 type:MM_ANONPAGES val:22 [ 151.258050] ================================================================== [ 151.258577] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 151.259099] Read of size 8 at addr ffff88800e2634e0 by task sshd/219 [ 151.259541] [ 151.259664] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 151.260222] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 151.260806] Call Trace: [ 151.261049] [ 151.261268] dump_stack_lvl+0x91/0xf0 [ 151.261649] print_report+0xcc/0x620 [ 151.262023] ? __virt_addr_valid+0x102/0x340 [ 151.262447] ? vma_interval_tree_remove+0xc75/0xec0 [ 151.262921] ? vma_interval_tree_remove+0xc75/0xec0 [ 151.263522] kasan_report+0xbe/0xf0 [ 151.263918] ? vma_interval_tree_remove+0xc75/0xec0 [ 151.264395] vma_interval_tree_remove+0xc75/0xec0 [ 151.264861] vma_prepare+0xc54/0x11a0 [ 151.265235] __split_vma+0x5af/0x950 [ 151.265608] ? __pfx___split_vma+0x10/0x10 [ 151.266015] ? find_held_lock+0x2c/0x110 [ 151.266423] do_vmi_align_munmap+0x2ba/0x11f0 [ 151.266866] ? lock_is_held_type+0x9f/0x120 [ 151.267295] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 151.267764] ? mtree_range_walk+0x632/0x900 [ 151.268177] ? mas_walk+0x5c7/0x7c0 [ 151.268436] do_vmi_munmap+0x1f1/0x2b0 [ 151.268708] mmap_region+0x1f9/0x2660 [ 151.268975] ? vm_mmap_pgoff+0x15c/0x3a0 [ 151.269255] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 151.269648] ? __pfx_lock_acquire+0x10/0x10 [ 151.269961] ? __pfx_mmap_region+0x10/0x10 [ 151.270269] ? security_mmap_addr+0x7d/0xa0 [ 151.270584] ? get_unmapped_area+0x1f5/0x3f0 [ 151.270904] do_mmap+0x854/0xf00 [ 151.271161] vm_mmap_pgoff+0x1a6/0x3a0 [ 151.271455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 151.271775] ksys_mmap_pgoff+0x3af/0x500 [ 151.272073] do_syscall_64+0x3f/0x90 [ 151.272357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 151.272740] RIP: 0033:0x7eff144bdd82 [ 151.273006] 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 [ 151.274250] RSP: 002b:00007ffd1bccda48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 151.274780] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff144bdd82 [ 151.275286] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff138f7000 [ 151.275774] RBP: 00007eff138f7000 R08: 0000000000000009 R09: 0000000000001000 [ 151.276268] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f51a32db20 [ 151.276768] R13: 00007ffd1bccda60 R14: 00007ffd1bccda90 R15: 00007ffd1bccddf0 [ 151.277272] [ 151.277440] [ 151.277564] Allocated by task 212: [ 151.277820] kasan_save_stack+0x22/0x50 [ 151.278113] kasan_set_track+0x25/0x30 [ 151.278401] __kasan_slab_alloc+0x59/0x70 [ 151.278706] kmem_cache_alloc+0x16b/0x370 [ 151.279009] vm_area_dup+0x20/0x160 [ 151.279283] __split_vma+0x170/0x950 [ 151.279558] split_vma+0xc6/0x110 [ 151.279809] mprotect_fixup+0x8d2/0xb30 [ 151.280099] do_mprotect_pkey+0x87e/0xd40 [ 151.280406] __x64_sys_mprotect+0x78/0xc0 [ 151.280715] do_syscall_64+0x3f/0x90 [ 151.280990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 151.281366] [ 151.281489] Freed by task 203: [ 151.281714] kasan_save_stack+0x22/0x50 [ 151.282012] kasan_set_track+0x25/0x30 [ 151.282296] kasan_save_free_info+0x2b/0x50 [ 151.282611] __kasan_slab_free+0x10a/0x190 [ 151.282917] kmem_cache_free+0x10d/0x4d0 [ 151.283210] rcu_core+0x8c8/0x2860 [ 151.283480] __do_softirq+0x1b7/0x7d4 [ 151.283759] [ 151.283886] Last potentially related work creation: [ 151.284233] kasan_save_stack+0x22/0x50 [ 151.284528] __kasan_record_aux_stack+0x8e/0xa0 [ 151.284865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 151.285245] remove_vma+0x139/0x170 [ 151.285512] do_vmi_align_munmap+0xd4a/0x11f0 [ 151.285833] do_vmi_munmap+0x1f1/0x2b0 [ 151.286122] __vm_munmap+0x138/0x3a0 [ 151.286512] __x64_sys_munmap+0x59/0x80 [ 151.286784] do_syscall_64+0x3f/0x90 [ 151.287040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 151.287397] [ 151.287515] Second to last potentially related work creation: [ 151.287893] kasan_save_stack+0x22/0x50 [ 151.288171] __kasan_record_aux_stack+0x8e/0xa0 [ 151.288483] __call_rcu_common.constprop.0+0x6a/0xb90 [ 151.288837] remove_vma+0x139/0x170 [ 151.289084] do_vmi_align_munmap+0xd4a/0x11f0 [ 151.289388] do_vmi_munmap+0x1f1/0x2b0 [ 151.289660] mmap_region+0x1f9/0x2660 [ 151.289920] do_mmap+0x854/0xf00 [ 151.290156] vm_mmap_pgoff+0x1a6/0x3a0 [ 151.290422] ksys_mmap_pgoff+0x3af/0x500 [ 151.290699] do_syscall_64+0x3f/0x90 [ 151.290960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 151.291316] [ 151.291437] The buggy address belongs to the object at ffff88800e263488 [ 151.291437] which belongs to the cache vm_area_struct of size 168 [ 151.292249] The buggy address is located 88 bytes inside of [ 151.292249] freed 168-byte region [ffff88800e263488, ffff88800e263530) [ 151.293022] [ 151.293142] The buggy address belongs to the physical page: [ 151.293515] page:00000000eae2c633 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe263 [ 151.294108] memcg:ffff88800dba3a01 [ 151.294349] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 151.294742] page_type: 0xffffffff() [ 151.294992] raw: 0100000000000200 ffff88800879fc80 ffffea0000386980 dead000000000007 [ 151.295505] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dba3a01 [ 151.296003] page dumped because: kasan: bad access detected [ 151.296368] [ 151.296487] Memory state around the buggy address: [ 151.296807] ffff88800e263380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 151.297280] ffff88800e263400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 151.297761] >ffff88800e263480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 151.298225] ^ [ 151.298643] ffff88800e263500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 151.299113] ffff88800e263580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 151.299588] ================================================================== [ 151.300098] Disabling lock debugging due to kernel taint [ 153.228986] BUG: Bad rss-counter state mm:00000000d07621ee type:MM_FILEPAGES val:33 [ 153.230352] BUG: Bad rss-counter state mm:00000000d07621ee type:MM_ANONPAGES val:22 [ 153.623517] BUG: Bad rss-counter state mm:00000000622b8016 type:MM_FILEPAGES val:33 [ 153.624700] BUG: Bad rss-counter state mm:00000000622b8016 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54662' (ECDSA) to the list of known hosts. 2023/06/20 07:34:01 fuzzer started 2023/06/20 07:34:02 dialing manager at localhost:44161 2023/06/20 07:34:02 checking machine... 2023/06/20 07:34:02 checking revisions... [ 154.361055] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:34:02 testing simple program... [ 154.410770] cgroup: Unknown subsys name 'net' [ 154.453382] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:32:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000001255 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8171ae9d RDI=ffff8880102f9f34 RBP=ffff8880102f9b40 RSP=ffff88800f42fe48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000558b6872e050 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff81374491 RFL=00000213 [----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3597bf4900 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=0000558b6872e050 CR3=000000000982e000 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=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=00007ffd3ac4e608 CR3=000000000c3f6000 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=34333a3730203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363030 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000