syzkaller login: [ 33.285293] BUG: Bad rss-counter state mm:000000007be8942f type:MM_FILEPAGES val:33 [ 33.286269] BUG: Bad rss-counter state mm:000000007be8942f type:MM_ANONPAGES val:22 [ 33.458364] ================================================================== [ 33.459377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.460403] Read of size 8 at addr ffff888016e87058 by task sshd/220 [ 33.461423] [ 33.461690] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.462630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.463699] Call Trace: [ 33.464047] [ 33.464365] dump_stack_lvl+0x91/0xf0 [ 33.464900] print_report+0xcc/0x620 [ 33.465426] ? __virt_addr_valid+0x102/0x340 [ 33.466073] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.466741] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.467413] kasan_report+0xbe/0xf0 [ 33.467924] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.468596] vma_interval_tree_remove+0xc75/0xec0 [ 33.469245] vma_prepare+0xc54/0x11a0 [ 33.469793] __split_vma+0x5af/0x950 [ 33.470309] ? __pfx___split_vma+0x10/0x10 [ 33.470884] ? find_held_lock+0x2c/0x110 [ 33.471447] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.472053] ? lock_is_held_type+0x9f/0x120 [ 33.472634] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.473286] ? mtree_range_walk+0x632/0x900 [ 33.473909] ? mas_walk+0x5c7/0x7c0 [ 33.474430] do_vmi_munmap+0x1f1/0x2b0 [ 33.474966] mmap_region+0x1f9/0x2660 [ 33.475501] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.476064] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.476834] ? __pfx_lock_acquire+0x10/0x10 [ 33.477414] ? __pfx_mmap_region+0x10/0x10 [ 33.478022] ? security_mmap_addr+0x7d/0xa0 [ 33.478596] ? get_unmapped_area+0x1f5/0x3f0 [ 33.479197] do_mmap+0x854/0xf00 [ 33.479671] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.480207] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.480817] ksys_mmap_pgoff+0x3af/0x500 [ 33.481359] do_syscall_64+0x3f/0x90 [ 33.481909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.482601] RIP: 0033:0x7fa34cf85d82 [ 33.483085] 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 [ 33.485355] RSP: 002b:00007fff012444b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.486352] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa34cf85d82 [ 33.487269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa34c3bf000 [ 33.488169] RBP: 00007fa34c3bf000 R08: 0000000000000009 R09: 0000000000001000 [ 33.489078] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f803887f70 [ 33.490013] R13: 00007fff012444d0 R14: 00007fff01244500 R15: 00007fff01244860 [ 33.490937] [ 33.491252] [ 33.491487] Allocated by task 213: [ 33.491943] kasan_save_stack+0x22/0x50 [ 33.492485] kasan_set_track+0x25/0x30 [ 33.493015] __kasan_slab_alloc+0x59/0x70 [ 33.493591] kmem_cache_alloc+0x16b/0x370 [ 33.494185] vm_area_dup+0x20/0x160 [ 33.494686] __split_vma+0x170/0x950 [ 33.495207] split_vma+0xc6/0x110 [ 33.495696] mprotect_fixup+0x8d2/0xb30 [ 33.496248] do_mprotect_pkey+0x87e/0xd40 [ 33.496816] __x64_sys_mprotect+0x78/0xc0 [ 33.497385] do_syscall_64+0x3f/0x90 [ 33.497942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.498649] [ 33.498884] Freed by task 203: [ 33.499315] kasan_save_stack+0x22/0x50 [ 33.499869] kasan_set_track+0x25/0x30 [ 33.500410] kasan_save_free_info+0x2b/0x50 [ 33.501000] __kasan_slab_free+0x10a/0x190 [ 33.501589] kmem_cache_free+0x10d/0x4d0 [ 33.502263] rcu_core+0x8c8/0x2860 [ 33.502749] __do_softirq+0x1b7/0x7d4 [ 33.503275] [ 33.503509] Last potentially related work creation: [ 33.504150] kasan_save_stack+0x22/0x50 [ 33.504704] __kasan_record_aux_stack+0x8e/0xa0 [ 33.505334] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.506081] remove_vma+0x139/0x170 [ 33.506574] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.507187] do_vmi_munmap+0x1f1/0x2b0 [ 33.507714] __vm_munmap+0x138/0x3a0 [ 33.508221] __x64_sys_munmap+0x59/0x80 [ 33.508754] do_syscall_64+0x3f/0x90 [ 33.509276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.509996] [ 33.510232] The buggy address belongs to the object at ffff888016e87000 [ 33.510232] which belongs to the cache vm_area_struct of size 168 [ 33.511827] The buggy address is located 88 bytes inside of [ 33.511827] freed 168-byte region [ffff888016e87000, ffff888016e870a8) [ 33.513344] [ 33.513578] The buggy address belongs to the physical page: [ 33.514327] page:00000000b562f2bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e87 [ 33.515526] memcg:ffff888018e12601 [ 33.515986] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.516693] page_type: 0xffffffff() [ 33.517181] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.518225] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e12601 [ 33.519218] page dumped because: kasan: bad access detected [ 33.519937] [ 33.520171] Memory state around the buggy address: [ 33.520802] ffff888016e86f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.521752] ffff888016e86f80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 33.522685] >ffff888016e87000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.523609] ^ [ 33.524394] ffff888016e87080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.525324] ffff888016e87100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.526275] ================================================================== [ 33.527276] Disabling lock debugging due to kernel taint [ 35.721310] BUG: Bad rss-counter state mm:00000000f5b62121 type:MM_FILEPAGES val:33 [ 35.722851] BUG: Bad rss-counter state mm:00000000f5b62121 type:MM_ANONPAGES val:22 [ 36.243476] BUG: Bad rss-counter state mm:000000008e639c0c type:MM_FILEPAGES val:33 [ 36.244646] BUG: Bad rss-counter state mm:000000008e639c0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36090' (ECDSA) to the list of known hosts. 2023/06/20 05:25:31 fuzzer started 2023/06/20 05:25:31 dialing manager at localhost:44161 2023/06/20 05:25:31 checking machine... 2023/06/20 05:25:31 checking revisions... [ 36.863530] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:25:32 testing simple program... [ 36.908263] cgroup: Unknown subsys name 'net' [ 36.950343] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:25:28 Registers: info registers vcpu 0 RAX=00000000e8d8d814 RBX=00000000ed2011fc RCX=ffff88801c977728 RDX=000000000000000e RSI=000000000000000a RDI=00000000b295bf87 RBP=ffffffff8366dfdf RSP=ffff88801c977678 R8 =00000000b5b3bae5 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=ffff88801c9776e0 R15=000000000000000e RIP=ffffffff82270eb0 RFL=00000286 [--S--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 00007f39c82bc900 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=00007ffd657fa000 CR3=000000000d6d0000 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=563412feff00545000000000000080fe 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=ffffffff8118ddc3 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff88806cf09fb8 RDI=ffffffff8118ddc3 RBP=ffffffff8118ddc3 RSP=ffff88806cf09a48 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=0000000000000001 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800d869410 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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=00007f336d3379e0 CR3=0000000016dc4000 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=2031333a35323a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a35323a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000