syzkaller login: [ 28.788275] BUG: Bad rss-counter state mm:000000005273857c type:MM_FILEPAGES val:33 [ 28.789500] BUG: Bad rss-counter state mm:000000005273857c type:MM_ANONPAGES val:22 [ 28.831217] ================================================================== [ 28.831918] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.832732] Read of size 8 at addr ffff88800df58df0 by task sshd/220 [ 28.833451] [ 28.833670] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.834424] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.835176] Call Trace: [ 28.835419] [ 28.835650] dump_stack_lvl+0x91/0xf0 [ 28.836025] print_report+0xcc/0x620 [ 28.836397] ? __virt_addr_valid+0x102/0x340 [ 28.836989] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.837466] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.837936] kasan_report+0xbe/0xf0 [ 28.838302] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.838775] vma_interval_tree_remove+0xc75/0xec0 [ 28.839263] vma_prepare+0xc54/0x11a0 [ 28.839650] __split_vma+0x5af/0x950 [ 28.839999] ? __pfx___split_vma+0x10/0x10 [ 28.840297] ? find_held_lock+0x2c/0x110 [ 28.840599] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.840916] ? lock_is_held_type+0x9f/0x120 [ 28.841229] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.841576] ? mtree_range_walk+0x632/0x900 [ 28.841896] ? mas_walk+0x5c7/0x7c0 [ 28.842166] do_vmi_munmap+0x1f1/0x2b0 [ 28.842446] mmap_region+0x1f9/0x2660 [ 28.842719] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.843009] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.843412] ? __pfx_lock_acquire+0x10/0x10 [ 28.843724] ? __pfx_mmap_region+0x10/0x10 [ 28.844026] ? security_mmap_addr+0x7d/0xa0 [ 28.844327] ? get_unmapped_area+0x1f5/0x3f0 [ 28.844639] do_mmap+0x854/0xf00 [ 28.844885] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.845168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.845486] ksys_mmap_pgoff+0x3af/0x500 [ 28.845775] do_syscall_64+0x3f/0x90 [ 28.846049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.846415] RIP: 0033:0x7f2550074d82 [ 28.846679] 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 [ 28.847913] RSP: 002b:00007fff5e4e6f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.848424] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2550074d82 [ 28.848906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f254f4ae000 [ 28.849385] RBP: 00007f254f4ae000 R08: 0000000000000009 R09: 0000000000001000 [ 28.849871] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556642b2db20 [ 28.850355] R13: 00007fff5e4e6f30 R14: 00007fff5e4e6f60 R15: 00007fff5e4e72c0 [ 28.850838] [ 28.851010] [ 28.851131] Allocated by task 212: [ 28.851372] kasan_save_stack+0x22/0x50 [ 28.851672] kasan_set_track+0x25/0x30 [ 28.851951] __kasan_slab_alloc+0x59/0x70 [ 28.852250] kmem_cache_alloc+0x16b/0x370 [ 28.852547] vm_area_dup+0x20/0x160 [ 28.852811] __split_vma+0x170/0x950 [ 28.853077] split_vma+0xc6/0x110 [ 28.853324] mprotect_fixup+0x8d2/0xb30 [ 28.853609] do_mprotect_pkey+0x87e/0xd40 [ 28.853905] __x64_sys_mprotect+0x78/0xc0 [ 28.854209] do_syscall_64+0x3f/0x90 [ 28.854473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.854838] [ 28.854960] Freed by task 212: [ 28.855185] kasan_save_stack+0x22/0x50 [ 28.855474] kasan_set_track+0x25/0x30 [ 28.855759] kasan_save_free_info+0x2b/0x50 [ 28.856055] __kasan_slab_free+0x10a/0x190 [ 28.856354] kmem_cache_free+0x10d/0x4d0 [ 28.856646] rcu_core+0x8c8/0x2860 [ 28.856897] __do_softirq+0x1b7/0x7d4 [ 28.857166] [ 28.857284] Last potentially related work creation: [ 28.857616] kasan_save_stack+0x22/0x50 [ 28.857902] __kasan_record_aux_stack+0x8e/0xa0 [ 28.858235] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.858603] remove_vma+0x139/0x170 [ 28.858859] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.859172] do_vmi_munmap+0x1f1/0x2b0 [ 28.859445] __vm_munmap+0x138/0x3a0 [ 28.859722] __x64_sys_munmap+0x59/0x80 [ 28.859995] do_syscall_64+0x3f/0x90 [ 28.860264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.860626] [ 28.860746] The buggy address belongs to the object at ffff88800df58d98 [ 28.860746] which belongs to the cache vm_area_struct of size 168 [ 28.861562] The buggy address is located 88 bytes inside of [ 28.861562] freed 168-byte region [ffff88800df58d98, ffff88800df58e40) [ 28.862343] [ 28.862466] The buggy address belongs to the physical page: [ 28.862830] page:000000005e15bf57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf58 [ 28.863456] memcg:ffff88800dfc2701 [ 28.863714] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.864084] page_type: 0xffffffff() [ 28.864339] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ab180 dead000000000008 [ 28.864863] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfc2701 [ 28.865425] page dumped because: kasan: bad access detected [ 28.865806] [ 28.865934] Memory state around the buggy address: [ 28.866283] ffff88800df58c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.866891] ffff88800df58d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.867406] >ffff88800df58d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.867902] ^ [ 28.868391] ffff88800df58e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.868874] ffff88800df58e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.869370] ================================================================== [ 28.869896] Disabling lock debugging due to kernel taint [ 30.850516] BUG: Bad rss-counter state mm:00000000b759690d type:MM_FILEPAGES val:33 [ 30.851695] BUG: Bad rss-counter state mm:00000000b759690d type:MM_ANONPAGES val:22 [ 31.259050] BUG: Bad rss-counter state mm:00000000d15af124 type:MM_FILEPAGES val:33 [ 31.260293] BUG: Bad rss-counter state mm:00000000d15af124 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6225' (ECDSA) to the list of known hosts. 2023/06/20 11:18:17 fuzzer started 2023/06/20 11:18:17 dialing manager at localhost:36067 2023/06/20 11:18:17 checking machine... 2023/06/20 11:18:17 checking revisions... [ 31.918456] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:18:17 testing simple program... [ 31.968006] cgroup: Unknown subsys name 'net' [ 32.015044] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:18:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea0000760ec0 RCX=0000000000000000 RDX=ffff888015df9b40 RSI=ffffffff81711f60 RDI=0000000000000005 RBP=ffff88801a0afd90 RSP=ffff88801a0afbf8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800f2973a0 R14=ffff88801a0afdb8 R15=ffffea0000760ef4 RIP=ffffffff814c089b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f102065c900 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=00007f10211b0044 CR3=0000000016b3e000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c616e696d7258420a322e322e302e00 XMM07=672065736f6c635f6e6f69737365733a 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=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=00007f807817efe0 CR3=000000000d7a4000 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=efa6421687c5b7a8744cf989b052d872 XMM02=000000000011a5c8ec2efd57dc4c00df XMM03=00000000001213181a99c93b0c54d5e4 XMM04=cffd6004f04fab4900000000000ae988 XMM05=19e9129bd510f2350000000000131890 XMM06=84e25f1b4fcf0a8b00000000001306f8 XMM07=e042d86d42eb936e0000000000121598 XMM08=1a99c93b0c54d5e4000000000011a628 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000