syzkaller login: [ 39.705206] BUG: Bad rss-counter state mm:00000000c2397494 type:MM_FILEPAGES val:33 [ 39.706437] BUG: Bad rss-counter state mm:00000000c2397494 type:MM_ANONPAGES val:22 [ 39.857438] ================================================================== [ 39.858515] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.859558] Read of size 8 at addr ffff88800ed78058 by task sshd/225 [ 39.860596] [ 39.860835] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.861637] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.862541] Call Trace: [ 39.862842] [ 39.863114] dump_stack_lvl+0x91/0xf0 [ 39.863577] print_report+0xcc/0x620 [ 39.864040] ? __virt_addr_valid+0x102/0x340 [ 39.864561] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.865134] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.865715] kasan_report+0xbe/0xf0 [ 39.866163] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.866744] vma_interval_tree_remove+0xc75/0xec0 [ 39.867310] vma_prepare+0xc54/0x11a0 [ 39.867760] __split_vma+0x5af/0x950 [ 39.868214] ? __pfx___split_vma+0x10/0x10 [ 39.868713] ? find_held_lock+0x2c/0x110 [ 39.869204] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.869734] ? lock_is_held_type+0x9f/0x120 [ 39.870239] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.870811] ? mtree_range_walk+0x632/0x900 [ 39.871330] ? mas_walk+0x5c7/0x7c0 [ 39.871775] do_vmi_munmap+0x1f1/0x2b0 [ 39.872259] mmap_region+0x1f9/0x2660 [ 39.872716] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.873199] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.873862] ? __pfx_lock_acquire+0x10/0x10 [ 39.874360] ? __pfx_mmap_region+0x10/0x10 [ 39.874855] ? security_mmap_addr+0x7d/0xa0 [ 39.875353] ? get_unmapped_area+0x1f5/0x3f0 [ 39.875868] do_mmap+0x854/0xf00 [ 39.876302] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.876787] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.877329] ksys_mmap_pgoff+0x3af/0x500 [ 39.877822] do_syscall_64+0x3f/0x90 [ 39.878287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.878912] RIP: 0033:0x7fd630340d82 [ 39.879356] 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 [ 39.881449] RSP: 002b:00007ffcd2e19af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.882327] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd630340d82 [ 39.883165] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd62f77a000 [ 39.884008] RBP: 00007fd62f77a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.884834] R10: 0000000000000812 R11: 0000000000000206 R12: 00005577a18d8f70 [ 39.885674] R13: 00007ffcd2e19b10 R14: 00007ffcd2e19b40 R15: 00007ffcd2e19ea0 [ 39.886516] [ 39.886799] [ 39.887006] Allocated by task 218: [ 39.887421] kasan_save_stack+0x22/0x50 [ 39.887910] kasan_set_track+0x25/0x30 [ 39.888398] __kasan_slab_alloc+0x59/0x70 [ 39.888971] kmem_cache_alloc+0x16b/0x370 [ 39.889506] vm_area_dup+0x20/0x160 [ 39.889969] __split_vma+0x170/0x950 [ 39.890447] split_vma+0xc6/0x110 [ 39.890907] mprotect_fixup+0x8d2/0xb30 [ 39.891422] do_mprotect_pkey+0x87e/0xd40 [ 39.891972] __x64_sys_mprotect+0x78/0xc0 [ 39.892511] do_syscall_64+0x3f/0x90 [ 39.893008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.893671] [ 39.893896] Freed by task 218: [ 39.894305] kasan_save_stack+0x22/0x50 [ 39.894828] kasan_set_track+0x25/0x30 [ 39.895334] kasan_save_free_info+0x2b/0x50 [ 39.895889] __kasan_slab_free+0x10a/0x190 [ 39.896449] kmem_cache_free+0x10d/0x4d0 [ 39.896978] rcu_core+0x8c8/0x2860 [ 39.897434] __do_softirq+0x1b7/0x7d4 [ 39.897937] [ 39.898160] Last potentially related work creation: [ 39.898782] kasan_save_stack+0x22/0x50 [ 39.899304] __kasan_record_aux_stack+0x8e/0xa0 [ 39.899903] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.900602] remove_vma+0x139/0x170 [ 39.901080] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.901732] do_vmi_munmap+0x1f1/0x2b0 [ 39.902244] __vm_munmap+0x138/0x3a0 [ 39.902724] __x64_sys_munmap+0x59/0x80 [ 39.903237] do_syscall_64+0x3f/0x90 [ 39.903722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.904401] [ 39.904622] The buggy address belongs to the object at ffff88800ed78000 [ 39.904622] which belongs to the cache vm_area_struct of size 168 [ 39.906156] The buggy address is located 88 bytes inside of [ 39.906156] freed 168-byte region [ffff88800ed78000, ffff88800ed780a8) [ 39.907628] [ 39.907853] The buggy address belongs to the physical page: [ 39.908562] page:000000000b06d203 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed78 [ 39.909697] memcg:ffff888018c8aa01 [ 39.910143] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.910822] page_type: 0xffffffff() [ 39.911288] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.912258] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c8aa01 [ 39.913200] page dumped because: kasan: bad access detected [ 39.913893] [ 39.914121] Memory state around the buggy address: [ 39.914722] ffff88800ed77f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.915627] ffff88800ed77f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.916538] >ffff88800ed78000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.917430] ^ [ 39.918198] ffff88800ed78080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.919090] ffff88800ed78100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.920000] ================================================================== [ 39.921067] Disabling lock debugging due to kernel taint [ 41.893048] BUG: Bad rss-counter state mm:00000000e714002f type:MM_FILEPAGES val:33 [ 41.895277] BUG: Bad rss-counter state mm:00000000e714002f type:MM_ANONPAGES val:22 [ 42.413168] BUG: Bad rss-counter state mm:0000000082b9b3a4 type:MM_FILEPAGES val:33 [ 42.414336] BUG: Bad rss-counter state mm:0000000082b9b3a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45674' (ECDSA) to the list of known hosts. 2023/06/19 11:52:28 fuzzer started 2023/06/19 11:52:29 dialing manager at localhost:44161 2023/06/19 11:52:29 checking machine... 2023/06/19 11:52:29 checking revisions... [ 42.979437] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:52:29 testing simple program... [ 43.014508] cgroup: Unknown subsys name 'net' [ 43.063144] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:52:24 Registers: info registers vcpu 0 RAX=0000000080010000 RBX=ffff88806ce2c250 RCX=ffffffff813bdac8 RDX=ffff88800f5d3680 RSI=0000000000000000 RDI=0000000000000007 RBP=00000000000f4240 RSP=ffff88806ce09dc0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000001fcf R11=0000000000000001 R12=0000000000001fcf R13=00000009d50b6740 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c01e1 RFL=00000046 [---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 00007f8b64a09900 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=00007fffe2b6cff8 CR3=000000000dc34000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f7a375914a0 CR3=00000000160a4000 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=32353a3131203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3433325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363238 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000