syzkaller login: [ 35.162690] BUG: Bad rss-counter state mm:0000000077dfe10f type:MM_FILEPAGES val:33 [ 35.163744] BUG: Bad rss-counter state mm:0000000077dfe10f type:MM_ANONPAGES val:22 [ 35.330067] ================================================================== [ 35.331162] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.332310] Read of size 8 at addr ffff8880097a9140 by task sshd/221 [ 35.333080] [ 35.333298] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.334167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.335172] Call Trace: [ 35.335493] [ 35.335778] dump_stack_lvl+0x91/0xf0 [ 35.336266] print_report+0xcc/0x620 [ 35.336749] ? __virt_addr_valid+0x102/0x340 [ 35.337301] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.337919] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.338531] kasan_report+0xbe/0xf0 [ 35.339019] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.339653] vma_interval_tree_remove+0xc75/0xec0 [ 35.340255] vma_prepare+0xc54/0x11a0 [ 35.340739] __split_vma+0x5af/0x950 [ 35.341209] ? __pfx___split_vma+0x10/0x10 [ 35.341735] ? find_held_lock+0x2c/0x110 [ 35.342250] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.342816] ? lock_is_held_type+0x9f/0x120 [ 35.343367] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.343971] ? mtree_range_walk+0x632/0x900 [ 35.344520] ? mas_walk+0x5c7/0x7c0 [ 35.344994] do_vmi_munmap+0x1f1/0x2b0 [ 35.345482] mmap_region+0x1f9/0x2660 [ 35.345963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.346467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.347187] ? __pfx_lock_acquire+0x10/0x10 [ 35.347716] ? __pfx_mmap_region+0x10/0x10 [ 35.348246] ? security_mmap_addr+0x7d/0xa0 [ 35.348776] ? get_unmapped_area+0x1f5/0x3f0 [ 35.349328] do_mmap+0x854/0xf00 [ 35.349763] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.350265] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.350829] ksys_mmap_pgoff+0x3af/0x500 [ 35.351356] do_syscall_64+0x3f/0x90 [ 35.351837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.352483] RIP: 0033:0x7f19d23e1d82 [ 35.352947] 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 [ 35.355096] RSP: 002b:00007fff698f2438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.356048] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19d23e1d82 [ 35.356917] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19d181b000 [ 35.357781] RBP: 00007f19d181b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.358649] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645ff794ec0 [ 35.359527] R13: 00007fff698f2450 R14: 00007fff698f2480 R15: 00007fff698f27e0 [ 35.360401] [ 35.360697] [ 35.360912] Allocated by task 214: [ 35.361344] kasan_save_stack+0x22/0x50 [ 35.361860] kasan_set_track+0x25/0x30 [ 35.362362] __kasan_slab_alloc+0x59/0x70 [ 35.362898] kmem_cache_alloc+0x16b/0x370 [ 35.363442] vm_area_dup+0x20/0x160 [ 35.363904] __split_vma+0x170/0x950 [ 35.364376] split_vma+0xc6/0x110 [ 35.364829] mprotect_fixup+0x8d2/0xb30 [ 35.365340] do_mprotect_pkey+0x87e/0xd40 [ 35.365874] __x64_sys_mprotect+0x78/0xc0 [ 35.366414] do_syscall_64+0x3f/0x90 [ 35.366894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.367553] [ 35.367773] Freed by task 204: [ 35.368172] kasan_save_stack+0x22/0x50 [ 35.368683] kasan_set_track+0x25/0x30 [ 35.369191] kasan_save_free_info+0x2b/0x50 [ 35.369738] __kasan_slab_free+0x10a/0x190 [ 35.370286] kmem_cache_free+0x10d/0x4d0 [ 35.370807] rcu_core+0x8c8/0x2860 [ 35.371263] __do_softirq+0x1b7/0x7d4 [ 35.371752] [ 35.371970] Last potentially related work creation: [ 35.372565] kasan_save_stack+0x22/0x50 [ 35.373074] __kasan_record_aux_stack+0x8e/0xa0 [ 35.373650] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.374307] remove_vma+0x139/0x170 [ 35.374770] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.375348] do_vmi_munmap+0x1f1/0x2b0 [ 35.375847] __vm_munmap+0x138/0x3a0 [ 35.376321] __x64_sys_munmap+0x59/0x80 [ 35.376834] do_syscall_64+0x3f/0x90 [ 35.377324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.377972] [ 35.378192] The buggy address belongs to the object at ffff8880097a90e8 [ 35.378192] which belongs to the cache vm_area_struct of size 168 [ 35.379668] The buggy address is located 88 bytes inside of [ 35.379668] freed 168-byte region [ffff8880097a90e8, ffff8880097a9190) [ 35.381087] [ 35.381306] The buggy address belongs to the physical page: [ 35.381979] page:00000000d07e8390 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97a9 [ 35.383088] memcg:ffff88800c5ff801 [ 35.383518] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.384228] page_type: 0xffffffff() [ 35.384674] raw: 0100000000000200 ffff88800879fc80 ffffea00003c1140 dead00000000000d [ 35.385595] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5ff801 [ 35.386501] page dumped because: kasan: bad access detected [ 35.387180] [ 35.387401] Memory state around the buggy address: [ 35.387986] ffff8880097a9000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.388842] ffff8880097a9080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.389742] >ffff8880097a9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.390602] ^ [ 35.391269] ffff8880097a9180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.392136] ffff8880097a9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.393003] ================================================================== [ 35.394009] Disabling lock debugging due to kernel taint [ 37.154427] BUG: Bad rss-counter state mm:00000000c6994f97 type:MM_FILEPAGES val:33 [ 37.155464] BUG: Bad rss-counter state mm:00000000c6994f97 type:MM_ANONPAGES val:22 [ 37.556705] BUG: Bad rss-counter state mm:000000005ea1dad7 type:MM_FILEPAGES val:33 [ 37.557718] BUG: Bad rss-counter state mm:000000005ea1dad7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42376' (ECDSA) to the list of known hosts. 2023/06/19 23:39:03 fuzzer started 2023/06/19 23:39:03 dialing manager at localhost:44161 2023/06/19 23:39:03 checking machine... 2023/06/19 23:39:03 checking revisions... [ 38.279790] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:39:03 testing simple program... [ 38.333220] cgroup: Unknown subsys name 'net' [ 38.381902] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:38:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002d6df5b RCX=0000000000000000 RDX=ffff88801954d1c0 RSI=ffffffff844f89e2 RDI=ffff888016b6faf8 RBP=ffff888016b6faf8 RSP=ffff888016b6fac8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888008f64798 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff844f2496 RFL=00000293 [--S-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 00007f18f9b7b900 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=00007ffc85c0e000 CR3=00000000095be000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f09537c69b0 CR3=0000000009680000 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=2bfcf03942bb1989bf4bc6656e1243af XMM02=2c67c8bc2e329bc3000000000011ec18 XMM03=fb795ef6d65770560000000000125668 XMM04=7bcae67be404f2eb00000000000ae988 XMM05=f4956b5a512f02040000000000135cd0 XMM06=c291bd5c70af25b900000000001350f8 XMM07=e042d86d42eb936e00000000001258e8 XMM08=91bfd78d7d42922e000000000011ec78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000