syzkaller login: [ 28.810741] BUG: Bad rss-counter state mm:00000000268dc744 type:MM_FILEPAGES val:33 [ 28.811956] BUG: Bad rss-counter state mm:00000000268dc744 type:MM_ANONPAGES val:22 [ 28.869641] ================================================================== [ 28.870347] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.871135] Read of size 8 at addr ffff88800e99e140 by task sshd/222 [ 28.871762] [ 28.871928] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.872578] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.873323] Call Trace: [ 28.873563] [ 28.873780] dump_stack_lvl+0x91/0xf0 [ 28.874162] print_report+0xcc/0x620 [ 28.874652] ? __virt_addr_valid+0x102/0x340 [ 28.875070] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.875544] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.876013] kasan_report+0xbe/0xf0 [ 28.876376] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.876849] vma_interval_tree_remove+0xc75/0xec0 [ 28.877410] vma_prepare+0xc54/0x11a0 [ 28.877778] __split_vma+0x5af/0x950 [ 28.878139] ? __pfx___split_vma+0x10/0x10 [ 28.878568] ? find_held_lock+0x2c/0x110 [ 28.878971] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.879406] ? lock_is_held_type+0x9f/0x120 [ 28.879826] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.880298] ? mtree_range_walk+0x632/0x900 [ 28.880749] ? mas_walk+0x5c7/0x7c0 [ 28.881144] do_vmi_munmap+0x1f1/0x2b0 [ 28.881534] mmap_region+0x1f9/0x2660 [ 28.881916] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.882313] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.882871] ? __pfx_lock_acquire+0x10/0x10 [ 28.883294] ? __pfx_mmap_region+0x10/0x10 [ 28.883724] ? security_mmap_addr+0x7d/0xa0 [ 28.884159] ? get_unmapped_area+0x1f5/0x3f0 [ 28.884587] do_mmap+0x854/0xf00 [ 28.884903] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.885183] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.885501] ksys_mmap_pgoff+0x3af/0x500 [ 28.885794] do_syscall_64+0x3f/0x90 [ 28.886090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.886472] RIP: 0033:0x7facbe556d82 [ 28.886741] 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 [ 28.888006] RSP: 002b:00007ffdb17326a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.888527] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007facbe556d82 [ 28.889042] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007facbd990000 [ 28.889546] RBP: 00007facbd990000 R08: 0000000000000009 R09: 0000000000001000 [ 28.890038] R10: 0000000000000812 R11: 0000000000000206 R12: 000056021d020ec0 [ 28.890541] R13: 00007ffdb17326c0 R14: 00007ffdb17326f0 R15: 00007ffdb1732a50 [ 28.891048] [ 28.891212] [ 28.891343] Allocated by task 214: [ 28.891603] kasan_save_stack+0x22/0x50 [ 28.891913] kasan_set_track+0x25/0x30 [ 28.892196] __kasan_slab_alloc+0x59/0x70 [ 28.892495] kmem_cache_alloc+0x16b/0x370 [ 28.892795] vm_area_dup+0x20/0x160 [ 28.893054] __split_vma+0x170/0x950 [ 28.893320] split_vma+0xc6/0x110 [ 28.893584] mprotect_fixup+0x8d2/0xb30 [ 28.893885] do_mprotect_pkey+0x87e/0xd40 [ 28.894185] __x64_sys_mprotect+0x78/0xc0 [ 28.894494] do_syscall_64+0x3f/0x90 [ 28.894767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.895152] [ 28.895277] Freed by task 214: [ 28.895509] kasan_save_stack+0x22/0x50 [ 28.895825] kasan_set_track+0x25/0x30 [ 28.896111] kasan_save_free_info+0x2b/0x50 [ 28.896430] __kasan_slab_free+0x10a/0x190 [ 28.896730] kmem_cache_free+0x10d/0x4d0 [ 28.897045] rcu_core+0x8c8/0x2860 [ 28.897307] __do_softirq+0x1b7/0x7d4 [ 28.897584] [ 28.897710] Last potentially related work creation: [ 28.898058] kasan_save_stack+0x22/0x50 [ 28.898355] __kasan_record_aux_stack+0x8e/0xa0 [ 28.898693] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.899088] remove_vma+0x139/0x170 [ 28.899349] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.899681] do_vmi_munmap+0x1f1/0x2b0 [ 28.899959] __vm_munmap+0x138/0x3a0 [ 28.900225] __x64_sys_munmap+0x59/0x80 [ 28.900537] do_syscall_64+0x3f/0x90 [ 28.900808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.901185] [ 28.901309] The buggy address belongs to the object at ffff88800e99e0e8 [ 28.901309] which belongs to the cache vm_area_struct of size 168 [ 28.902189] The buggy address is located 88 bytes inside of [ 28.902189] freed 168-byte region [ffff88800e99e0e8, ffff88800e99e190) [ 28.903005] [ 28.903129] The buggy address belongs to the physical page: [ 28.903530] page:000000003e3d67b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe99e [ 28.904173] memcg:ffff88800e97fb01 [ 28.904430] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.904812] page_type: 0xffffffff() [ 28.905077] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 28.905630] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e97fb01 [ 28.906157] page dumped because: kasan: bad access detected [ 28.906546] [ 28.906673] Memory state around the buggy address: [ 28.907037] ffff88800e99e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.907552] ffff88800e99e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 28.908055] >ffff88800e99e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.908574] ^ [ 28.908948] ffff88800e99e180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.909452] ffff88800e99e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.909951] ================================================================== [ 28.910729] Disabling lock debugging due to kernel taint [ 30.681072] BUG: Bad rss-counter state mm:0000000031572024 type:MM_FILEPAGES val:33 [ 30.682181] BUG: Bad rss-counter state mm:0000000031572024 type:MM_ANONPAGES val:22 [ 31.136073] BUG: Bad rss-counter state mm:000000004b9fcfa6 type:MM_FILEPAGES val:33 [ 31.137182] BUG: Bad rss-counter state mm:000000004b9fcfa6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32546' (ECDSA) to the list of known hosts. 2023/06/20 14:02:24 fuzzer started 2023/06/20 14:02:24 dialing manager at localhost:36067 2023/06/20 14:02:24 checking machine... 2023/06/20 14:02:24 checking revisions... [ 31.857734] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:02:24 testing simple program... [ 31.912358] cgroup: Unknown subsys name 'net' [ 31.964484] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:02:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f1321f0aace RCX=1ffffffff0ba7530 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f1321f0aace RSP=ffff88800d8bf458 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f1321f0a000 R11=00000000000b6d53 R12=ffff88800d8bf570 R13=0000000000000000 R14=ffff88800c49d1c0 R15=0000000000000000 RIP=ffffffff8135b93c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1321386900 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=00007f13207e53d0 CR3=000000000c9fa000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=92a58f1c65c508f500000000000ae988 XMM05=cb250af05fb2f77900000000001327b0 XMM06=59d5b690e0af863b00000000001316a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880171c0000 RSI=ffffffff814c8575 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff8880171d7490 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=00000000000000a4 RIP=ffffffff812d8664 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 00007f7dec2f4900 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=00007ffc04e49000 CR3=000000000e84c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000