syzkaller login: [ 30.712640] BUG: Bad rss-counter state mm:000000002d8e4668 type:MM_FILEPAGES val:33 [ 30.714785] BUG: Bad rss-counter state mm:000000002d8e4668 type:MM_ANONPAGES val:22 [ 30.885819] ================================================================== [ 30.886866] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.888007] Read of size 8 at addr ffff88800fb83140 by task sshd/220 [ 30.888853] [ 30.889102] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.890030] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.891070] Call Trace: [ 30.891408] [ 30.891708] dump_stack_lvl+0x91/0xf0 [ 30.892228] print_report+0xcc/0x620 [ 30.892736] ? __virt_addr_valid+0x102/0x340 [ 30.893320] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.893995] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.894643] kasan_report+0xbe/0xf0 [ 30.895147] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.895802] vma_interval_tree_remove+0xc75/0xec0 [ 30.896440] vma_prepare+0xc54/0x11a0 [ 30.896944] __split_vma+0x5af/0x950 [ 30.897442] ? __pfx___split_vma+0x10/0x10 [ 30.898012] ? find_held_lock+0x2c/0x110 [ 30.898560] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.899156] ? lock_is_held_type+0x9f/0x120 [ 30.899724] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.900362] ? mtree_range_walk+0x632/0x900 [ 30.900944] ? mas_walk+0x5c7/0x7c0 [ 30.901446] do_vmi_munmap+0x1f1/0x2b0 [ 30.901976] mmap_region+0x1f9/0x2660 [ 30.902485] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.903023] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.903774] ? __pfx_lock_acquire+0x10/0x10 [ 30.904348] ? __pfx_mmap_region+0x10/0x10 [ 30.904904] ? security_mmap_addr+0x7d/0xa0 [ 30.905491] ? get_unmapped_area+0x1f5/0x3f0 [ 30.906071] do_mmap+0x854/0xf00 [ 30.906537] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.907055] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.907648] ksys_mmap_pgoff+0x3af/0x500 [ 30.908181] do_syscall_64+0x3f/0x90 [ 30.908685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.909364] RIP: 0033:0x7eff1320cd82 [ 30.909857] 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 [ 30.912380] RSP: 002b:00007ffd91f34bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.913563] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff1320cd82 [ 30.914682] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff12646000 [ 30.915799] RBP: 00007eff12646000 R08: 0000000000000009 R09: 0000000000001000 [ 30.916901] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cdb742fec0 [ 30.918045] R13: 00007ffd91f34bf0 R14: 00007ffd91f34c20 R15: 00007ffd91f34f80 [ 30.919168] [ 30.919549] [ 30.919828] Allocated by task 213: [ 30.920379] kasan_save_stack+0x22/0x50 [ 30.921036] kasan_set_track+0x25/0x30 [ 30.921685] __kasan_slab_alloc+0x59/0x70 [ 30.922365] kmem_cache_alloc+0x16b/0x370 [ 30.923020] vm_area_dup+0x20/0x160 [ 30.923610] __split_vma+0x170/0x950 [ 30.924222] split_vma+0xc6/0x110 [ 30.924791] mprotect_fixup+0x8d2/0xb30 [ 30.925438] do_mprotect_pkey+0x87e/0xd40 [ 30.926141] __x64_sys_mprotect+0x78/0xc0 [ 30.926809] do_syscall_64+0x3f/0x90 [ 30.927416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.928243] [ 30.928518] Freed by task 213: [ 30.929041] kasan_save_stack+0x22/0x50 [ 30.929783] kasan_set_track+0x25/0x30 [ 30.930409] kasan_save_free_info+0x2b/0x50 [ 30.931099] __kasan_slab_free+0x10a/0x190 [ 30.931797] kmem_cache_free+0x10d/0x4d0 [ 30.932465] rcu_core+0x8c8/0x2860 [ 30.933033] __do_softirq+0x1b7/0x7d4 [ 30.933684] [ 30.933966] Last potentially related work creation: [ 30.934728] kasan_save_stack+0x22/0x50 [ 30.935380] __kasan_record_aux_stack+0x8e/0xa0 [ 30.936111] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.936953] remove_vma+0x139/0x170 [ 30.937547] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.938259] do_vmi_munmap+0x1f1/0x2b0 [ 30.938891] __vm_munmap+0x138/0x3a0 [ 30.939500] __x64_sys_munmap+0x59/0x80 [ 30.940146] do_syscall_64+0x3f/0x90 [ 30.940748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.941591] [ 30.941863] The buggy address belongs to the object at ffff88800fb830e8 [ 30.941863] which belongs to the cache vm_area_struct of size 168 [ 30.943773] The buggy address is located 88 bytes inside of [ 30.943773] freed 168-byte region [ffff88800fb830e8, ffff88800fb83190) [ 30.945619] [ 30.945898] The buggy address belongs to the physical page: [ 30.946728] page:00000000cee550d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb83 [ 30.948134] memcg:ffff888019beb601 [ 30.948681] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.949527] page_type: 0xffffffff() [ 30.950120] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.951312] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019beb601 [ 30.952485] page dumped because: kasan: bad access detected [ 30.953333] [ 30.953611] Memory state around the buggy address: [ 30.954364] ffff88800fb83000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.955481] ffff88800fb83080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.956611] >ffff88800fb83100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.957733] ^ [ 30.958559] ffff88800fb83180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.959667] ffff88800fb83200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.960775] ================================================================== [ 30.962022] Disabling lock debugging due to kernel taint [ 32.970055] BUG: Bad rss-counter state mm:00000000c4fdb309 type:MM_FILEPAGES val:33 [ 32.971215] BUG: Bad rss-counter state mm:00000000c4fdb309 type:MM_ANONPAGES val:22 [ 33.445996] BUG: Bad rss-counter state mm:0000000078a04035 type:MM_FILEPAGES val:33 [ 33.446977] BUG: Bad rss-counter state mm:0000000078a04035 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57805' (ECDSA) to the list of known hosts. 2023/06/21 02:11:02 fuzzer started 2023/06/21 02:11:02 dialing manager at localhost:36067 2023/06/21 02:11:02 checking machine... 2023/06/21 02:11:02 checking revisions... [ 34.179006] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:11:03 testing simple program... [ 34.223462] cgroup: Unknown subsys name 'net' [ 34.274278] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:11:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff852cabc0 RCX=ffffffff81ef5746 RDX=ffff88800fcd3680 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88801c98fcd8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000dc0 R14=0000000000000010 R15=ffff88801a101000 RIP=ffffffff814c0864 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 00007f6140297900 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=00007f614084e618 CR3=000000000f238000 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=00007f589157d180 CR3=000000000ca4e000 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=d22ae0999938df92ef44fd71abe0c5b8 XMM02=ec2efd57dc4c00df000000000011b428 XMM03=d65bf8011fc9c3f5000000000011b4f8 XMM04=86dd23d88dfbb2af00000000000ae988 XMM05=19e9129bd510f2350000000000132040 XMM06=4fda316b135da52b0000000000131ec8 XMM07=e042d86d42eb936e0000000000122420 XMM08=d65bf8011fc9c3f5000000000011b4f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000