syzkaller login: [ 64.500868] BUG: Bad rss-counter state mm:0000000039803766 type:MM_FILEPAGES val:33 [ 64.502069] BUG: Bad rss-counter state mm:0000000039803766 type:MM_ANONPAGES val:22 [ 64.540168] ================================================================== [ 64.541199] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.542288] Read of size 8 at addr ffff88800fc2e5c8 by task sshd/227 [ 64.543259] [ 64.543491] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 64.544456] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.545574] Call Trace: [ 64.545962] [ 64.546248] dump_stack_lvl+0x91/0xf0 [ 64.546799] print_report+0xcc/0x620 [ 64.547352] ? __virt_addr_valid+0x102/0x340 [ 64.547993] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.548607] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.549356] kasan_report+0xbe/0xf0 [ 64.549834] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.550440] vma_interval_tree_remove+0xc75/0xec0 [ 64.551028] vma_prepare+0xc54/0x11a0 [ 64.551516] __split_vma+0x5af/0x950 [ 64.551977] ? __pfx___split_vma+0x10/0x10 [ 64.552645] ? find_held_lock+0x2c/0x110 [ 64.553159] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.553718] ? lock_is_held_type+0x9f/0x120 [ 64.554409] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.555048] ? mtree_range_walk+0x632/0x900 [ 64.555636] ? mas_walk+0x5c7/0x7c0 [ 64.556108] do_vmi_munmap+0x1f1/0x2b0 [ 64.556677] mmap_region+0x1f9/0x2660 [ 64.557310] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.557871] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.558572] ? __pfx_lock_acquire+0x10/0x10 [ 64.559097] ? __pfx_mmap_region+0x10/0x10 [ 64.559627] ? security_mmap_addr+0x7d/0xa0 [ 64.560144] ? get_unmapped_area+0x1f5/0x3f0 [ 64.560681] do_mmap+0x854/0xf00 [ 64.561116] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.561610] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.562164] ksys_mmap_pgoff+0x3af/0x500 [ 64.562663] do_syscall_64+0x3f/0x90 [ 64.563137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.563779] RIP: 0033:0x7fd4d6657d82 [ 64.564239] 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 [ 64.566311] RSP: 002b:00007ffd6e260048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.567195] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd4d6657d82 [ 64.568040] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4d5a91000 [ 64.568865] RBP: 00007fd4d5a91000 R08: 0000000000000009 R09: 0000000000001000 [ 64.569694] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf3b800ec0 [ 64.570517] R13: 00007ffd6e260060 R14: 00007ffd6e260090 R15: 00007ffd6e2603f0 [ 64.571354] [ 64.571654] [ 64.571864] Allocated by task 220: [ 64.572279] kasan_save_stack+0x22/0x50 [ 64.572767] kasan_set_track+0x25/0x30 [ 64.573244] __kasan_slab_alloc+0x59/0x70 [ 64.573750] kmem_cache_alloc+0x16b/0x370 [ 64.574248] vm_area_dup+0x20/0x160 [ 64.574687] __split_vma+0x170/0x950 [ 64.575143] split_vma+0xc6/0x110 [ 64.575582] mprotect_fixup+0x8d2/0xb30 [ 64.576073] do_mprotect_pkey+0x87e/0xd40 [ 64.576583] __x64_sys_mprotect+0x78/0xc0 [ 64.577102] do_syscall_64+0x3f/0x90 [ 64.577562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.578193] [ 64.578399] Freed by task 220: [ 64.578782] kasan_save_stack+0x22/0x50 [ 64.579277] kasan_set_track+0x25/0x30 [ 64.579760] kasan_save_free_info+0x2b/0x50 [ 64.580275] __kasan_slab_free+0x10a/0x190 [ 64.580790] kmem_cache_free+0x10d/0x4d0 [ 64.581277] rcu_core+0x8c8/0x2860 [ 64.581705] __do_softirq+0x1b7/0x7d4 [ 64.582170] [ 64.582376] Last potentially related work creation: [ 64.582943] kasan_save_stack+0x22/0x50 [ 64.583448] __kasan_record_aux_stack+0x8e/0xa0 [ 64.584006] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.584624] remove_vma+0x139/0x170 [ 64.585138] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.585678] do_vmi_munmap+0x1f1/0x2b0 [ 64.586148] __vm_munmap+0x138/0x3a0 [ 64.586597] __x64_sys_munmap+0x59/0x80 [ 64.587082] do_syscall_64+0x3f/0x90 [ 64.587545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.588161] [ 64.588369] The buggy address belongs to the object at ffff88800fc2e570 [ 64.588369] which belongs to the cache vm_area_struct of size 168 [ 64.589785] The buggy address is located 88 bytes inside of [ 64.589785] freed 168-byte region [ffff88800fc2e570, ffff88800fc2e618) [ 64.591155] [ 64.591367] The buggy address belongs to the physical page: [ 64.592024] page:0000000086e6e945 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc2e [ 64.593054] memcg:ffff88800c591c01 [ 64.593461] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.594097] page_type: 0xffffffff() [ 64.594534] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 64.595428] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c591c01 [ 64.596306] page dumped because: kasan: bad access detected [ 64.596944] [ 64.597151] Memory state around the buggy address: [ 64.597710] ffff88800fc2e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.598542] ffff88800fc2e500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 64.599379] >ffff88800fc2e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.600205] ^ [ 64.600848] ffff88800fc2e600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 64.601688] ffff88800fc2e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.602502] ================================================================== [ 64.603400] Disabling lock debugging due to kernel taint [ 66.456050] BUG: Bad rss-counter state mm:00000000ab64e0ec type:MM_FILEPAGES val:33 [ 66.456902] BUG: Bad rss-counter state mm:00000000ab64e0ec type:MM_ANONPAGES val:22 [ 66.867036] BUG: Bad rss-counter state mm:00000000e235b67a type:MM_FILEPAGES val:33 [ 66.867784] BUG: Bad rss-counter state mm:00000000e235b67a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38919' (ECDSA) to the list of known hosts. 2023/06/20 02:56:28 fuzzer started 2023/06/20 02:56:28 dialing manager at localhost:44161 2023/06/20 02:56:28 checking machine... 2023/06/20 02:56:28 checking revisions... [ 67.499062] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:56:28 testing simple program... [ 67.547802] cgroup: Unknown subsys name 'net' [ 67.605877] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:56:24 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88806ce361a0 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff818306a8 RBP=ffff88800e1dcb00 RSP=ffff8880181c7c90 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff88806ce361c8 R13=ffffffff87b67200 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff818306ac 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 00007fbe86c22900 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=00007fff37f04000 CR3=0000000009648000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880163971a0 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=ffffffff87b86f80 RDI=ffff888016a9f554 RBP=ffff888016a9f4c0 RSP=ffff88806cf09e08 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=0000000000000000 R12=0000000000000287 R13=ffffea000058e580 R14=ffffffff813782a8 R15=ffff88800e264d00 RIP=ffffffff845135d8 RFL=00000017 [----APC] 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 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=00007f53bc0bba80 CR3=000000000d656000 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=724c8ba6b72713ba9e49b4dcfed5a5ed XMM02=000000000011d5f8eff9b2d0a8fce9cb XMM03=000000000011d6c82c67c8bc2e329bc3 XMM04=90d0946c64f34cd500000000000ae988 XMM05=16bbfc4fa606b6250000000000133bf0 XMM06=fead87c2c87cefbf0000000000132dc8 XMM07=e042d86d42eb936e0000000000124698 XMM08=c184e43f3084acfe000000000011d6c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000