syzkaller login: [ 62.718694] BUG: Bad rss-counter state mm:00000000a19cfd07 type:MM_FILEPAGES val:33 [ 62.720131] BUG: Bad rss-counter state mm:00000000a19cfd07 type:MM_ANONPAGES val:22 [ 62.847711] ================================================================== [ 62.848426] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.849138] Read of size 8 at addr ffff8880144c6a50 by task sshd/220 [ 62.849727] [ 62.849893] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.850546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.851426] Call Trace: [ 62.851668] [ 62.851883] dump_stack_lvl+0x91/0xf0 [ 62.852259] print_report+0xcc/0x620 [ 62.852631] ? __virt_addr_valid+0x102/0x340 [ 62.853046] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.853537] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.854001] kasan_report+0xbe/0xf0 [ 62.854362] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.854840] vma_interval_tree_remove+0xc75/0xec0 [ 62.855300] vma_prepare+0xc54/0x11a0 [ 62.855665] __split_vma+0x5af/0x950 [ 62.856022] ? __pfx___split_vma+0x10/0x10 [ 62.856427] ? find_held_lock+0x2c/0x110 [ 62.856824] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.857267] ? lock_is_held_type+0x9f/0x120 [ 62.857684] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.858150] ? mtree_range_walk+0x632/0x900 [ 62.858573] ? mas_walk+0x5c7/0x7c0 [ 62.858950] do_vmi_munmap+0x1f1/0x2b0 [ 62.859328] mmap_region+0x1f9/0x2660 [ 62.859706] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.860108] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.860658] ? __pfx_lock_acquire+0x10/0x10 [ 62.861067] ? __pfx_mmap_region+0x10/0x10 [ 62.861484] ? security_mmap_addr+0x7d/0xa0 [ 62.861888] ? get_unmapped_area+0x1f5/0x3f0 [ 62.862309] do_mmap+0x854/0xf00 [ 62.862667] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.863059] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.863500] ksys_mmap_pgoff+0x3af/0x500 [ 62.863886] do_syscall_64+0x3f/0x90 [ 62.864262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.864766] RIP: 0033:0x7f31c0f5dd82 [ 62.865114] 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 [ 62.866741] RSP: 002b:00007ffc2ec66938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.867438] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31c0f5dd82 [ 62.868077] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31c0397000 [ 62.868722] RBP: 00007f31c0397000 R08: 0000000000000009 R09: 0000000000001000 [ 62.869367] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aab7951f70 [ 62.870010] R13: 00007ffc2ec66950 R14: 00007ffc2ec66980 R15: 00007ffc2ec66ce0 [ 62.870678] [ 62.870902] [ 62.871064] Allocated by task 213: [ 62.871409] kasan_save_stack+0x22/0x50 [ 62.871806] kasan_set_track+0x25/0x30 [ 62.872184] __kasan_slab_alloc+0x59/0x70 [ 62.872585] kmem_cache_alloc+0x16b/0x370 [ 62.872981] vm_area_dup+0x20/0x160 [ 62.873334] __split_vma+0x170/0x950 [ 62.873693] split_vma+0xc6/0x110 [ 62.874027] mprotect_fixup+0x8d2/0xb30 [ 62.874415] do_mprotect_pkey+0x87e/0xd40 [ 62.874825] __x64_sys_mprotect+0x78/0xc0 [ 62.875222] do_syscall_64+0x3f/0x90 [ 62.875587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.876070] [ 62.876233] Freed by task 213: [ 62.876532] kasan_save_stack+0x22/0x50 [ 62.876911] kasan_set_track+0x25/0x30 [ 62.877297] kasan_save_free_info+0x2b/0x50 [ 62.877707] __kasan_slab_free+0x10a/0x190 [ 62.878113] kmem_cache_free+0x10d/0x4d0 [ 62.878512] rcu_core+0x8c8/0x2860 [ 62.878861] __do_softirq+0x1b7/0x7d4 [ 62.879228] [ 62.879391] Last potentially related work creation: [ 62.879845] kasan_save_stack+0x22/0x50 [ 62.880227] __kasan_record_aux_stack+0x8e/0xa0 [ 62.880670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.881161] remove_vma+0x139/0x170 [ 62.881511] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.881944] do_vmi_munmap+0x1f1/0x2b0 [ 62.882314] __vm_munmap+0x138/0x3a0 [ 62.882683] __x64_sys_munmap+0x59/0x80 [ 62.883062] do_syscall_64+0x3f/0x90 [ 62.883432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.883925] [ 62.884090] The buggy address belongs to the object at ffff8880144c69f8 [ 62.884090] which belongs to the cache vm_area_struct of size 168 [ 62.885237] The buggy address is located 88 bytes inside of [ 62.885237] freed 168-byte region [ffff8880144c69f8, ffff8880144c6aa0) [ 62.886327] [ 62.886501] The buggy address belongs to the physical page: [ 62.887026] page:0000000085c0d458 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144c6 [ 62.887873] memcg:ffff88800d58ae01 [ 62.888209] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.888712] page_type: 0xffffffff() [ 62.889057] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.889766] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d58ae01 [ 62.890458] page dumped because: kasan: bad access detected [ 62.890975] [ 62.891137] Memory state around the buggy address: [ 62.891582] ffff8880144c6900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.892238] ffff8880144c6980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 62.892889] >ffff8880144c6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.893538] ^ [ 62.894078] ffff8880144c6a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 62.894749] ffff8880144c6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.895412] ================================================================== [ 62.896221] Disabling lock debugging due to kernel taint [ 64.717684] BUG: Bad rss-counter state mm:000000008a036716 type:MM_FILEPAGES val:33 [ 64.718731] BUG: Bad rss-counter state mm:000000008a036716 type:MM_ANONPAGES val:22 [ 65.204413] BUG: Bad rss-counter state mm:000000000a70de6d type:MM_FILEPAGES val:33 [ 65.205402] BUG: Bad rss-counter state mm:000000000a70de6d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4501' (ECDSA) to the list of known hosts. 2023/06/20 07:19:55 fuzzer started 2023/06/20 07:19:55 dialing manager at localhost:44161 2023/06/20 07:19:55 checking machine... 2023/06/20 07:19:55 checking revisions... [ 65.913539] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:19:55 testing simple program... [ 65.969865] cgroup: Unknown subsys name 'net' [ 66.021003] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:19:53 Registers: info registers vcpu 0 RAX=0000002abbc9d1fc RBX=0000000000000000 RCX=00000000000006e0 RDX=000000000000002a RSI=ffff88806ce28140 RDI=000000000005380f RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ef07d R11=0000000000000001 R12=000000000005380f R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000013 [----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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe9724f7900 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=00007fe972aaf0b0 CR3=000000000d748000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=00007ffeb865ec18 CR3=000000000ddb2000 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=2034353a39313a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a39313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000