syzkaller login: [ 30.075869] BUG: Bad rss-counter state mm:00000000c1f3efcb type:MM_FILEPAGES val:33 [ 30.077251] BUG: Bad rss-counter state mm:00000000c1f3efcb type:MM_ANONPAGES val:22 [ 30.232329] ================================================================== [ 30.233237] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.234164] Read of size 8 at addr ffff88800ff9f6b0 by task sshd/221 [ 30.234918] [ 30.235247] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.236129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.237093] Call Trace: [ 30.237426] [ 30.237711] dump_stack_lvl+0x91/0xf0 [ 30.238203] print_report+0xcc/0x620 [ 30.238684] ? __virt_addr_valid+0x102/0x340 [ 30.239225] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.239859] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.240477] kasan_report+0xbe/0xf0 [ 30.240947] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.241571] vma_interval_tree_remove+0xc75/0xec0 [ 30.242170] vma_prepare+0xc54/0x11a0 [ 30.242645] __split_vma+0x5af/0x950 [ 30.243107] ? __pfx___split_vma+0x10/0x10 [ 30.243641] ? find_held_lock+0x2c/0x110 [ 30.244160] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.244729] ? lock_is_held_type+0x9f/0x120 [ 30.245263] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.245862] ? mtree_range_walk+0x632/0x900 [ 30.246409] ? mas_walk+0x5c7/0x7c0 [ 30.246885] do_vmi_munmap+0x1f1/0x2b0 [ 30.247371] mmap_region+0x1f9/0x2660 [ 30.247867] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.248375] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.249090] ? __pfx_lock_acquire+0x10/0x10 [ 30.249626] ? __pfx_mmap_region+0x10/0x10 [ 30.250150] ? security_mmap_addr+0x7d/0xa0 [ 30.250681] ? get_unmapped_area+0x1f5/0x3f0 [ 30.251237] do_mmap+0x854/0xf00 [ 30.251692] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.252186] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.252742] ksys_mmap_pgoff+0x3af/0x500 [ 30.253248] do_syscall_64+0x3f/0x90 [ 30.253735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.254379] RIP: 0033:0x7f14e976ed82 [ 30.254837] 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 [ 30.256972] RSP: 002b:00007fff83569a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.257875] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f14e976ed82 [ 30.258721] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f14e8ba8000 [ 30.259562] RBP: 00007f14e8ba8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.260420] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653cd1d2ec0 [ 30.261265] R13: 00007fff83569a40 R14: 00007fff83569a70 R15: 00007fff83569dd0 [ 30.262113] [ 30.262410] [ 30.262621] Allocated by task 214: [ 30.263044] kasan_save_stack+0x22/0x50 [ 30.263547] kasan_set_track+0x25/0x30 [ 30.264053] __kasan_slab_alloc+0x59/0x70 [ 30.264585] kmem_cache_alloc+0x16b/0x370 [ 30.265099] vm_area_dup+0x20/0x160 [ 30.265554] __split_vma+0x170/0x950 [ 30.266027] split_vma+0xc6/0x110 [ 30.266470] mprotect_fixup+0x8d2/0xb30 [ 30.266981] do_mprotect_pkey+0x87e/0xd40 [ 30.267508] __x64_sys_mprotect+0x78/0xc0 [ 30.268044] do_syscall_64+0x3f/0x90 [ 30.268526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.269176] [ 30.269394] Freed by task 214: [ 30.269784] kasan_save_stack+0x22/0x50 [ 30.270291] kasan_set_track+0x25/0x30 [ 30.270790] kasan_save_free_info+0x2b/0x50 [ 30.271330] __kasan_slab_free+0x10a/0x190 [ 30.271886] kmem_cache_free+0x10d/0x4d0 [ 30.272401] rcu_core+0x8c8/0x2860 [ 30.272847] __do_softirq+0x1b7/0x7d4 [ 30.273330] [ 30.273551] Last potentially related work creation: [ 30.274145] kasan_save_stack+0x22/0x50 [ 30.274655] __kasan_record_aux_stack+0x8e/0xa0 [ 30.275232] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.275886] remove_vma+0x139/0x170 [ 30.276339] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.276897] do_vmi_munmap+0x1f1/0x2b0 [ 30.277388] __vm_munmap+0x138/0x3a0 [ 30.277864] __x64_sys_munmap+0x59/0x80 [ 30.278371] do_syscall_64+0x3f/0x90 [ 30.278848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.279499] [ 30.279735] The buggy address belongs to the object at ffff88800ff9f658 [ 30.279735] which belongs to the cache vm_area_struct of size 168 [ 30.281217] The buggy address is located 88 bytes inside of [ 30.281217] freed 168-byte region [ffff88800ff9f658, ffff88800ff9f700) [ 30.282633] [ 30.282854] The buggy address belongs to the physical page: [ 30.283521] page:00000000e3ab8769 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff9f [ 30.284618] memcg:ffff88800f71d801 [ 30.285045] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.285746] page_type: 0xffffffff() [ 30.286205] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.287126] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f71d801 [ 30.288045] page dumped because: kasan: bad access detected [ 30.288715] [ 30.288933] Memory state around the buggy address: [ 30.289520] ffff88800ff9f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.290400] ffff88800ff9f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.291273] >ffff88800ff9f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.292147] ^ [ 30.292740] ffff88800ff9f700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.293600] ffff88800ff9f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.294456] ================================================================== [ 30.295446] Disabling lock debugging due to kernel taint [ 32.266170] BUG: Bad rss-counter state mm:0000000086572a38 type:MM_FILEPAGES val:33 [ 32.267327] BUG: Bad rss-counter state mm:0000000086572a38 type:MM_ANONPAGES val:22 [ 32.652701] BUG: Bad rss-counter state mm:00000000792ebe75 type:MM_FILEPAGES val:33 [ 32.653689] BUG: Bad rss-counter state mm:00000000792ebe75 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45630' (ECDSA) to the list of known hosts. 2023/06/20 11:01:07 fuzzer started 2023/06/20 11:01:08 dialing manager at localhost:36067 2023/06/20 11:01:08 checking machine... 2023/06/20 11:01:08 checking revisions... [ 33.378868] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:01:08 testing simple program... [ 33.440743] cgroup: Unknown subsys name 'net' [ 33.509502] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:01:07 Registers: info registers vcpu 0 RAX=ffffffff85d3e490 RBX=0000000000000000 RCX=ffffffff85d3e490 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff813710b9 RSP=ffff88800ee17d00 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00000000000000a8 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff812d134a 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb980c93900 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=00007ffd52344000 CR3=000000000ed80000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=00007f00d4be20a0 CR3=000000000d9d4000 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=16943f4de82ac2a4e843e123dbd2c0b1 XMM02=000000000011b7d8ec2efd57dc4c00df XMM03=00000000001224e06a97be957a311aaa XMM04=3a9601dd11850ee600000000000ae988 XMM05=e4cb8bb95a7664b600000000001323b8 XMM06=c291bd5c70af25b90000000000132240 XMM07=e042d86d42eb936e0000000000122760 XMM08=6a97be957a311aaa000000000011b838 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000