syzkaller login: [ 28.676571] BUG: Bad rss-counter state mm:00000000069c71c9 type:MM_FILEPAGES val:33 [ 28.677855] BUG: Bad rss-counter state mm:00000000069c71c9 type:MM_ANONPAGES val:22 [ 28.866397] ================================================================== [ 28.867349] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.868296] Read of size 8 at addr ffff88800ef51058 by task sshd/220 [ 28.869072] [ 28.869294] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.870253] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.871227] Call Trace: [ 28.871546] [ 28.871830] dump_stack_lvl+0x91/0xf0 [ 28.872347] print_report+0xcc/0x620 [ 28.872834] ? __virt_addr_valid+0x102/0x340 [ 28.873389] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.874006] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.874616] kasan_report+0xbe/0xf0 [ 28.875100] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.875723] vma_interval_tree_remove+0xc75/0xec0 [ 28.876333] vma_prepare+0xc54/0x11a0 [ 28.876810] __split_vma+0x5af/0x950 [ 28.877282] ? __pfx___split_vma+0x10/0x10 [ 28.877809] ? find_held_lock+0x2c/0x110 [ 28.878330] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.878903] ? lock_is_held_type+0x9f/0x120 [ 28.879447] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.880056] ? mtree_range_walk+0x632/0x900 [ 28.880607] ? mas_walk+0x5c7/0x7c0 [ 28.881083] do_vmi_munmap+0x1f1/0x2b0 [ 28.881581] mmap_region+0x1f9/0x2660 [ 28.882064] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.882574] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.883303] ? __pfx_lock_acquire+0x10/0x10 [ 28.883844] ? __pfx_mmap_region+0x10/0x10 [ 28.884374] ? security_mmap_addr+0x7d/0xa0 [ 28.884905] ? get_unmapped_area+0x1f5/0x3f0 [ 28.885457] do_mmap+0x854/0xf00 [ 28.885902] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.886394] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.886969] ksys_mmap_pgoff+0x3af/0x500 [ 28.887473] do_syscall_64+0x3f/0x90 [ 28.887956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.888603] RIP: 0033:0x7f55886b7d82 [ 28.889061] 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 [ 28.891205] RSP: 002b:00007ffdeb2115a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.892109] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55886b7d82 [ 28.892957] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5587af1000 [ 28.893803] RBP: 00007f5587af1000 R08: 0000000000000009 R09: 0000000000001000 [ 28.894650] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d2b5ddf70 [ 28.895532] R13: 00007ffdeb2115c0 R14: 00007ffdeb2115f0 R15: 00007ffdeb211950 [ 28.896389] [ 28.896686] [ 28.896898] Allocated by task 211: [ 28.897339] kasan_save_stack+0x22/0x50 [ 28.897859] kasan_set_track+0x25/0x30 [ 28.898357] __kasan_slab_alloc+0x59/0x70 [ 28.898882] kmem_cache_alloc+0x16b/0x370 [ 28.899415] vm_area_dup+0x20/0x160 [ 28.899871] __split_vma+0x170/0x950 [ 28.900336] split_vma+0xc6/0x110 [ 28.900774] mprotect_fixup+0x8d2/0xb30 [ 28.901272] do_mprotect_pkey+0x87e/0xd40 [ 28.901789] __x64_sys_mprotect+0x78/0xc0 [ 28.902308] do_syscall_64+0x3f/0x90 [ 28.902779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.903435] [ 28.903648] Freed by task 19: [ 28.904031] kasan_save_stack+0x22/0x50 [ 28.904532] kasan_set_track+0x25/0x30 [ 28.905021] kasan_save_free_info+0x2b/0x50 [ 28.905552] __kasan_slab_free+0x10a/0x190 [ 28.906084] kmem_cache_free+0x10d/0x4d0 [ 28.906587] rcu_core+0x8c8/0x2860 [ 28.907051] __do_softirq+0x1b7/0x7d4 [ 28.907529] [ 28.907745] Last potentially related work creation: [ 28.908338] kasan_save_stack+0x22/0x50 [ 28.908837] __kasan_record_aux_stack+0x8e/0xa0 [ 28.909410] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.910059] remove_vma+0x139/0x170 [ 28.910508] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.911068] do_vmi_munmap+0x1f1/0x2b0 [ 28.911548] __vm_munmap+0x138/0x3a0 [ 28.912018] __x64_sys_munmap+0x59/0x80 [ 28.912516] do_syscall_64+0x3f/0x90 [ 28.912992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.913634] [ 28.913847] The buggy address belongs to the object at ffff88800ef51000 [ 28.913847] which belongs to the cache vm_area_struct of size 168 [ 28.915324] The buggy address is located 88 bytes inside of [ 28.915324] freed 168-byte region [ffff88800ef51000, ffff88800ef510a8) [ 28.916723] [ 28.916939] The buggy address belongs to the physical page: [ 28.917600] page:00000000fa0a5f26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef51 [ 28.918680] memcg:ffff88800cf8c301 [ 28.919124] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.919765] page_type: 0xffffffff() [ 28.920221] raw: 0100000000000200 ffff8880087a0c80 ffffea000040a940 dead000000000002 [ 28.921136] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cf8c301 [ 28.922054] page dumped because: kasan: bad access detected [ 28.922713] [ 28.922937] Memory state around the buggy address: [ 28.923515] ffff88800ef50f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 28.924366] ffff88800ef50f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.925225] >ffff88800ef51000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.926082] ^ [ 28.926825] ffff88800ef51080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.927693] ffff88800ef51100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.928544] ================================================================== [ 28.929501] Disabling lock debugging due to kernel taint [ 30.881782] BUG: Bad rss-counter state mm:0000000033769353 type:MM_FILEPAGES val:33 [ 30.882814] BUG: Bad rss-counter state mm:0000000033769353 type:MM_ANONPAGES val:22 [ 31.348788] BUG: Bad rss-counter state mm:000000007bf3287f type:MM_FILEPAGES val:33 [ 31.349972] BUG: Bad rss-counter state mm:000000007bf3287f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38473' (ECDSA) to the list of known hosts. 2023/06/20 16:41:16 fuzzer started 2023/06/20 16:41:17 dialing manager at localhost:36067 2023/06/20 16:41:17 checking machine... 2023/06/20 16:41:17 checking revisions... [ 32.072584] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:41:17 testing simple program... [ 32.128995] cgroup: Unknown subsys name 'net' [ 32.189083] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:41:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000246 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff8880100ec298 RBP=ffff8880100ec298 RSP=ffff88801470f728 R8 =0000000000000000 R9 =ffffed100201d853 R10=ffff8880100ec29b R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000003 R15=0000000000000246 RIP=ffffffff81534290 RFL=00000002 [-------] 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 00007fbc8e400900 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=00007fbc8d847c00 CR3=000000000ca0c000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c8c2abede72ab49d00000000000ae988 XMM05=c0928f76219d14970000000000131e70 XMM06=ea47f3fe18a2720f0000000000130f18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff8613f401 RDX=0000000000000000 RSI=ffffffff818475d2 RDI=ffff8880191ef8e4 RBP=0000000000000000 RSP=ffff8880191ef800 R8 =ffffffff8613f412 R9 =ffff8880191ef850 R10=0000000000038001 R11=0000000000021e7d R12=ffff8880191ef8d8 R13=0000000000000000 R14=ffff88800b848000 R15=ffff888019881390 RIP=ffffffff813ad571 RFL=00000282 [--S----] 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 00007f0c48d5c900 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=00007f0c49313618 CR3=000000000c4a8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000