syzkaller login: [ 24.769006] BUG: Bad rss-counter state mm:00000000b8c25d5b type:MM_FILEPAGES val:33 [ 24.770431] BUG: Bad rss-counter state mm:00000000b8c25d5b type:MM_ANONPAGES val:22 [ 24.927654] ================================================================== [ 24.928615] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.929571] Read of size 8 at addr ffff88800ee09c20 by task sshd/218 [ 24.930458] [ 24.930681] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.931559] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.932589] Call Trace: [ 24.932917] <TASK> [ 24.933204] dump_stack_lvl+0x91/0xf0 [ 24.933706] print_report+0xcc/0x620 [ 24.934193] ? __virt_addr_valid+0x102/0x340 [ 24.934744] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.935362] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.935989] kasan_report+0xbe/0xf0 [ 24.936465] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.937109] vma_interval_tree_remove+0xc75/0xec0 [ 24.937729] vma_prepare+0xc54/0x11a0 [ 24.938209] __split_vma+0x5af/0x950 [ 24.938686] ? __pfx___split_vma+0x10/0x10 [ 24.939214] ? find_held_lock+0x2c/0x110 [ 24.939757] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.940332] ? lock_is_held_type+0x9f/0x120 [ 24.940869] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.941485] ? mtree_range_walk+0x632/0x900 [ 24.942041] ? mas_walk+0x5c7/0x7c0 [ 24.942521] do_vmi_munmap+0x1f1/0x2b0 [ 24.943015] mmap_region+0x1f9/0x2660 [ 24.943498] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.944031] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.944749] ? __pfx_lock_acquire+0x10/0x10 [ 24.945289] ? __pfx_mmap_region+0x10/0x10 [ 24.945829] ? security_mmap_addr+0x7d/0xa0 [ 24.946359] ? get_unmapped_area+0x1f5/0x3f0 [ 24.946908] do_mmap+0x854/0xf00 [ 24.947354] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.947864] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.948432] ksys_mmap_pgoff+0x3af/0x500 [ 24.948941] do_syscall_64+0x3f/0x90 [ 24.949427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.950076] RIP: 0033:0x7f38e71c5d82 [ 24.950540] 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 [ 24.952684] RSP: 002b:00007ffedc70ce48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.953605] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38e71c5d82 [ 24.954465] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38e65ff000 [ 24.955321] RBP: 00007f38e65ff000 R08: 0000000000000009 R09: 0000000000001000 [ 24.956200] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e742e20ec0 [ 24.957062] R13: 00007ffedc70ce60 R14: 00007ffedc70ce90 R15: 00007ffedc70d1f0 [ 24.957921] </TASK> [ 24.958216] [ 24.958431] Allocated by task 211: [ 24.958874] kasan_save_stack+0x22/0x50 [ 24.959380] kasan_set_track+0x25/0x30 [ 24.959893] __kasan_slab_alloc+0x59/0x70 [ 24.960417] kmem_cache_alloc+0x16b/0x370 [ 24.960943] vm_area_dup+0x20/0x160 [ 24.961397] __split_vma+0x170/0x950 [ 24.961878] split_vma+0xc6/0x110 [ 24.962318] mprotect_fixup+0x8d2/0xb30 [ 24.962825] do_mprotect_pkey+0x87e/0xd40 [ 24.963346] __x64_sys_mprotect+0x78/0xc0 [ 24.963897] do_syscall_64+0x3f/0x90 [ 24.964373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.965022] [ 24.965241] Freed by task 209: [ 24.965637] kasan_save_stack+0x22/0x50 [ 24.966148] kasan_set_track+0x25/0x30 [ 24.966640] kasan_save_free_info+0x2b/0x50 [ 24.967178] __kasan_slab_free+0x10a/0x190 [ 24.967724] kmem_cache_free+0x10d/0x4d0 [ 24.968240] rcu_core+0x8c8/0x2860 [ 24.968682] __do_softirq+0x1b7/0x7d4 [ 24.969170] [ 24.969384] Last potentially related work creation: [ 24.969969] kasan_save_stack+0x22/0x50 [ 24.970471] __kasan_record_aux_stack+0x8e/0xa0 [ 24.971045] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.971693] remove_vma+0x139/0x170 [ 24.972154] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.972721] do_vmi_munmap+0x1f1/0x2b0 [ 24.973211] __vm_munmap+0x138/0x3a0 [ 24.973677] __x64_sys_munmap+0x59/0x80 [ 24.974187] do_syscall_64+0x3f/0x90 [ 24.974664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.975313] [ 24.975530] The buggy address belongs to the object at ffff88800ee09bc8 [ 24.975530] which belongs to the cache vm_area_struct of size 168 [ 24.977037] The buggy address is located 88 bytes inside of [ 24.977037] freed 168-byte region [ffff88800ee09bc8, ffff88800ee09c70) [ 24.978469] [ 24.978686] The buggy address belongs to the physical page: [ 24.979343] page:0000000021eedb71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee09 [ 24.980445] memcg:ffff88800ede1201 [ 24.980882] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.981532] page_type: 0xffffffff() [ 24.981989] raw: 0100000000000200 ffff88800879fc80 ffffea0000397400 dead000000000006 [ 24.982917] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ede1201 [ 24.983842] page dumped because: kasan: bad access detected [ 24.984513] [ 24.984734] Memory state around the buggy address: [ 24.985325] ffff88800ee09b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.986198] ffff88800ee09b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.987057] >ffff88800ee09c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.987927] ^ [ 24.988456] ffff88800ee09c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.989318] ffff88800ee09d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.990178] ================================================================== [ 24.991261] Disabling lock debugging due to kernel taint [ 26.897940] BUG: Bad rss-counter state mm:00000000c463ee6c type:MM_FILEPAGES val:33 [ 26.899555] BUG: Bad rss-counter state mm:00000000c463ee6c type:MM_ANONPAGES val:22 [ 27.390809] BUG: Bad rss-counter state mm:000000002ab47e3b type:MM_FILEPAGES val:33 [ 27.392662] BUG: Bad rss-counter state mm:000000002ab47e3b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21697' (ECDSA) to the list of known hosts. 2023/06/19 18:45:27 fuzzer started 2023/06/19 18:45:28 dialing manager at localhost:44161 2023/06/19 18:45:28 checking machine... 2023/06/19 18:45:28 checking revisions... [ 28.224835] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:45:28 testing simple program... [ 28.266101] cgroup: Unknown subsys name 'net' [ 28.324491] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:45:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff81afc2f2 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801ac4aa50 RSP=ffff888018fb7958 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800cb2d900 R13=ffff88801ac4aa78 R14=ffff88801005a380 R15=1ffff110031f6f33 RIP=ffffffff814c01c9 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 00007f1238369900 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=00007f123891e650 CR3=000000001a95c000 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=ffff88806c400000 RBX=000000003f75390e RCX=ffff88806c69c870 RDX=000000000000000e RSI=0000000000000001 RDI=000000009304876c RBP=ffff88800f286a80 RSP=ffff888016b8f570 R8 =0000000045818dae R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000800 R14=ffff888016b8f5f8 R15=000000000000000e RIP=ffffffff82270f13 RFL=00000202 [-------] 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 00007f50cd66d700 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=00007f4a8007d9a0 CR3=000000001587a000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732037323a3534 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323536 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000