syzkaller login: [ 32.080304] BUG: Bad rss-counter state mm:00000000ed585362 type:MM_FILEPAGES val:33 [ 32.081592] BUG: Bad rss-counter state mm:00000000ed585362 type:MM_ANONPAGES val:22 [ 32.231592] ================================================================== [ 32.232490] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.233439] Read of size 8 at addr ffff88800e1a7798 by task sshd/219 [ 32.234302] [ 32.234518] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.235371] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.236336] Call Trace: [ 32.236651] [ 32.236934] dump_stack_lvl+0x91/0xf0 [ 32.237426] print_report+0xcc/0x620 [ 32.237904] ? __virt_addr_valid+0x102/0x340 [ 32.238451] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.239060] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.239671] kasan_report+0xbe/0xf0 [ 32.240143] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.240768] vma_interval_tree_remove+0xc75/0xec0 [ 32.241416] vma_prepare+0xc54/0x11a0 [ 32.241910] __split_vma+0x5af/0x950 [ 32.242389] ? __pfx___split_vma+0x10/0x10 [ 32.242926] ? find_held_lock+0x2c/0x110 [ 32.243453] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.244030] ? lock_is_held_type+0x9f/0x120 [ 32.244573] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.245196] ? mtree_range_walk+0x632/0x900 [ 32.245770] ? mas_walk+0x5c7/0x7c0 [ 32.246252] do_vmi_munmap+0x1f1/0x2b0 [ 32.246752] mmap_region+0x1f9/0x2660 [ 32.247238] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.247763] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.248510] ? __pfx_lock_acquire+0x10/0x10 [ 32.249054] ? __pfx_mmap_region+0x10/0x10 [ 32.249627] ? security_mmap_addr+0x7d/0xa0 [ 32.250165] ? get_unmapped_area+0x1f5/0x3f0 [ 32.250735] do_mmap+0x854/0xf00 [ 32.251180] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.251681] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.252248] ksys_mmap_pgoff+0x3af/0x500 [ 32.252765] do_syscall_64+0x3f/0x90 [ 32.253252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.253912] RIP: 0033:0x7f6080e30d82 [ 32.254376] 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 [ 32.256512] RSP: 002b:00007ffd8454c7c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.257433] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6080e30d82 [ 32.258292] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f608026a000 [ 32.259146] RBP: 00007f608026a000 R08: 0000000000000009 R09: 0000000000001000 [ 32.259999] R10: 0000000000000812 R11: 0000000000000206 R12: 000056355e9f1f70 [ 32.260843] R13: 00007ffd8454c7e0 R14: 00007ffd8454c810 R15: 00007ffd8454cb70 [ 32.261703] [ 32.261996] [ 32.262210] Allocated by task 212: [ 32.262651] kasan_save_stack+0x22/0x50 [ 32.263158] kasan_set_track+0x25/0x30 [ 32.263657] __kasan_slab_alloc+0x59/0x70 [ 32.264181] kmem_cache_alloc+0x16b/0x370 [ 32.264695] vm_area_dup+0x20/0x160 [ 32.265273] __split_vma+0x170/0x950 [ 32.265914] split_vma+0xc6/0x110 [ 32.266508] mprotect_fixup+0x8d2/0xb30 [ 32.267189] do_mprotect_pkey+0x87e/0xd40 [ 32.267900] __x64_sys_mprotect+0x78/0xc0 [ 32.268561] do_syscall_64+0x3f/0x90 [ 32.269041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.269728] [ 32.269944] Freed by task 212: [ 32.270354] kasan_save_stack+0x22/0x50 [ 32.270860] kasan_set_track+0x25/0x30 [ 32.271403] kasan_save_free_info+0x2b/0x50 [ 32.271938] __kasan_slab_free+0x10a/0x190 [ 32.272587] kmem_cache_free+0x10d/0x4d0 [ 32.273095] rcu_core+0x8c8/0x2860 [ 32.273550] __do_softirq+0x1b7/0x7d4 [ 32.274031] [ 32.274247] Last potentially related work creation: [ 32.274838] kasan_save_stack+0x22/0x50 [ 32.275345] __kasan_record_aux_stack+0x8e/0xa0 [ 32.275922] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.276564] remove_vma+0x139/0x170 [ 32.277012] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.277603] do_vmi_munmap+0x1f1/0x2b0 [ 32.278099] __vm_munmap+0x138/0x3a0 [ 32.278570] __x64_sys_munmap+0x59/0x80 [ 32.279070] do_syscall_64+0x3f/0x90 [ 32.279555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.280212] [ 32.280426] The buggy address belongs to the object at ffff88800e1a7740 [ 32.280426] which belongs to the cache vm_area_struct of size 168 [ 32.281910] The buggy address is located 88 bytes inside of [ 32.281910] freed 168-byte region [ffff88800e1a7740, ffff88800e1a77e8) [ 32.283313] [ 32.283538] The buggy address belongs to the physical page: [ 32.284205] page:00000000230a9e7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1a7 [ 32.285336] memcg:ffff888016edfc01 [ 32.285767] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.286421] page_type: 0xffffffff() [ 32.286885] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.287851] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016edfc01 [ 32.288807] page dumped because: kasan: bad access detected [ 32.289529] [ 32.289749] Memory state around the buggy address: [ 32.290356] ffff88800e1a7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.291281] ffff88800e1a7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.292213] >ffff88800e1a7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.293096] ^ [ 32.293641] ffff88800e1a7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.294516] ffff88800e1a7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.295386] ================================================================== [ 32.296402] Disabling lock debugging due to kernel taint [ 34.517654] BUG: Bad rss-counter state mm:000000003dd1043a type:MM_FILEPAGES val:33 [ 34.518758] BUG: Bad rss-counter state mm:000000003dd1043a type:MM_ANONPAGES val:22 [ 35.064826] BUG: Bad rss-counter state mm:00000000efbee5ff type:MM_FILEPAGES val:33 [ 35.066009] BUG: Bad rss-counter state mm:00000000efbee5ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40561' (ECDSA) to the list of known hosts. 2023/06/20 07:43:42 fuzzer started 2023/06/20 07:43:43 dialing manager at localhost:44161 2023/06/20 07:43:43 checking machine... 2023/06/20 07:43:43 checking revisions... [ 35.721342] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:43:43 testing simple program... [ 35.774097] cgroup: Unknown subsys name 'net' [ 35.830325] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:43:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff5311a3b8 CR3=000000000f6e2000 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=2032343a33343a3730203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a363832373520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a33343a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f6142f43400 RCX=ffffffff813a0ac9 RDX=ffff88800efa3680 RSI=0000000042f43400 RDI=0000000000000000 RBP=ffffffffffffffff RSP=ffff888016377850 R8 =0000000000000006 R9 =00007f6142f43477 R10=ffffffffffffffff R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88800efa3680 R15=0000000000092c40 RIP=ffffffff814c0328 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 00007f6142a50900 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=00007f6143005650 CR3=0000000016302000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000