syzkaller login: [ 70.275802] BUG: Bad rss-counter state mm:0000000096bdc474 type:MM_FILEPAGES val:33 [ 70.276692] BUG: Bad rss-counter state mm:0000000096bdc474 type:MM_ANONPAGES val:22 [ 70.384585] ================================================================== [ 70.385251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.385895] Read of size 8 at addr ffff888015987140 by task sshd/220 [ 70.386440] [ 70.386582] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 70.387342] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.388018] Call Trace: [ 70.388274] [ 70.388475] dump_stack_lvl+0x91/0xf0 [ 70.388844] print_report+0xcc/0x620 [ 70.389175] ? __virt_addr_valid+0x102/0x340 [ 70.389706] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.390142] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.390569] kasan_report+0xbe/0xf0 [ 70.390904] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.391349] vma_interval_tree_remove+0xc75/0xec0 [ 70.391776] vma_prepare+0xc54/0x11a0 [ 70.392106] __split_vma+0x5af/0x950 [ 70.392437] ? __pfx___split_vma+0x10/0x10 [ 70.392812] ? find_held_lock+0x2c/0x110 [ 70.393190] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.393581] ? lock_is_held_type+0x9f/0x120 [ 70.393969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.394388] ? mtree_range_walk+0x632/0x900 [ 70.394774] ? mas_walk+0x5c7/0x7c0 [ 70.395100] do_vmi_munmap+0x1f1/0x2b0 [ 70.395456] mmap_region+0x1f9/0x2660 [ 70.395807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.396174] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.396657] ? __pfx_lock_acquire+0x10/0x10 [ 70.397069] ? __pfx_mmap_region+0x10/0x10 [ 70.397484] ? security_mmap_addr+0x7d/0xa0 [ 70.397848] ? get_unmapped_area+0x1f5/0x3f0 [ 70.398259] do_mmap+0x854/0xf00 [ 70.398574] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.398947] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.399339] ksys_mmap_pgoff+0x3af/0x500 [ 70.399695] do_syscall_64+0x3f/0x90 [ 70.400040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.400483] RIP: 0033:0x7ff607669d82 [ 70.400825] 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 [ 70.402367] RSP: 002b:00007ffe7719cb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.403017] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff607669d82 [ 70.403616] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff606aa3000 [ 70.404220] RBP: 00007ff606aa3000 R08: 0000000000000009 R09: 0000000000001000 [ 70.404848] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c40cd8cec0 [ 70.405450] R13: 00007ffe7719cb80 R14: 00007ffe7719cbb0 R15: 00007ffe7719cf10 [ 70.406070] [ 70.406291] [ 70.406475] Allocated by task 212: [ 70.406765] kasan_save_stack+0x22/0x50 [ 70.407128] kasan_set_track+0x25/0x30 [ 70.407497] __kasan_slab_alloc+0x59/0x70 [ 70.407872] kmem_cache_alloc+0x16b/0x370 [ 70.408244] vm_area_dup+0x20/0x160 [ 70.408563] __split_vma+0x170/0x950 [ 70.408917] split_vma+0xc6/0x110 [ 70.409231] mprotect_fixup+0x8d2/0xb30 [ 70.409586] do_mprotect_pkey+0x87e/0xd40 [ 70.409973] __x64_sys_mprotect+0x78/0xc0 [ 70.410350] do_syscall_64+0x3f/0x90 [ 70.410689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.411159] [ 70.411312] Freed by task 212: [ 70.411587] kasan_save_stack+0x22/0x50 [ 70.411950] kasan_set_track+0x25/0x30 [ 70.412295] kasan_save_free_info+0x2b/0x50 [ 70.412677] __kasan_slab_free+0x10a/0x190 [ 70.413070] kmem_cache_free+0x10d/0x4d0 [ 70.413428] rcu_core+0x8c8/0x2860 [ 70.413742] __do_softirq+0x1b7/0x7d4 [ 70.414079] [ 70.414232] Last potentially related work creation: [ 70.414649] kasan_save_stack+0x22/0x50 [ 70.415007] __kasan_record_aux_stack+0x8e/0xa0 [ 70.415457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.415916] remove_vma+0x139/0x170 [ 70.416263] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.416666] do_vmi_munmap+0x1f1/0x2b0 [ 70.417045] __vm_munmap+0x138/0x3a0 [ 70.417378] __x64_sys_munmap+0x59/0x80 [ 70.417733] do_syscall_64+0x3f/0x90 [ 70.418058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.418518] [ 70.418679] The buggy address belongs to the object at ffff8880159870e8 [ 70.418679] which belongs to the cache vm_area_struct of size 168 [ 70.419728] The buggy address is located 88 bytes inside of [ 70.419728] freed 168-byte region [ffff8880159870e8, ffff888015987190) [ 70.420717] [ 70.420890] The buggy address belongs to the physical page: [ 70.421370] page:000000002734462d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15987 [ 70.422132] memcg:ffff88800f9a5001 [ 70.422427] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.422886] page_type: 0xffffffff() [ 70.423217] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 70.423922] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f9a5001 [ 70.424597] page dumped because: kasan: bad access detected [ 70.425080] [ 70.425230] Memory state around the buggy address: [ 70.425639] ffff888015987000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 70.426231] ffff888015987080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 70.426981] >ffff888015987100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.427624] ^ [ 70.428089] ffff888015987180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 70.428825] ffff888015987200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 70.429433] ================================================================== [ 70.430296] Disabling lock debugging due to kernel taint [ 71.892943] BUG: Bad rss-counter state mm:0000000013e56daf type:MM_FILEPAGES val:33 [ 71.893671] BUG: Bad rss-counter state mm:0000000013e56daf type:MM_ANONPAGES val:22 [ 72.273342] BUG: Bad rss-counter state mm:00000000646fdcce type:MM_FILEPAGES val:33 [ 72.274068] BUG: Bad rss-counter state mm:00000000646fdcce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37808' (ECDSA) to the list of known hosts. 2023/06/20 09:12:41 fuzzer started 2023/06/20 09:12:41 dialing manager at localhost:44161 2023/06/20 09:12:41 checking machine... 2023/06/20 09:12:41 checking revisions... [ 72.864591] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:12:41 testing simple program... [ 72.914920] cgroup: Unknown subsys name 'net' [ 72.981701] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:12:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007fbf684ab477 RSP=ffff88801667fa30 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fbf684ab000 R11=00000000000b6996 R12=ffff88801667fb48 R13=0000000000000000 R14=ffff88800dcf8000 R15=ffff88800e301130 RIP=ffffffff8135b910 RFL=00000216 [----AP-] 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 00007fbf67fb8900 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=00007fff50440000 CR3=0000000010356000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff8604e2c0 RCX=ffffffff8450d7d6 RDX=0000000000000001 RSI=ffffffff864b1a1c RDI=ffffffff8604e2b4 RBP=ffffffff8604e2c0 RSP=ffff88806cf099e0 R8 =ffffffff864b1a1c R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b53b8 R12=ffffffff8604e2c4 R13=ffffffff8604e2b4 R14=ffffffff8604e2bc R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000257 [---ZAPC] 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=00007f6bcce52530 CR3=000000000e80e000 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=a8f241894b085f99dc48bffe2fbac6e8 XMM02=00000000001217e0ec2efd57dc4c00df XMM03=0000000000128c7077486c6ebffbb586 XMM04=318f1c108eff387300000000000ae988 XMM05=c03a9af0699ffd2d0000000000139668 XMM06=4fda316b135da52b0000000000138d00 XMM07=e042d86d42eb936e0000000000128ef0 XMM08=77486c6ebffbb5860000000000121840 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000