syzkaller login: [ 39.069305] BUG: Bad rss-counter state mm:000000001af9176d type:MM_FILEPAGES val:33 [ 39.070505] BUG: Bad rss-counter state mm:000000001af9176d type:MM_ANONPAGES val:22 [ 39.215841] ================================================================== [ 39.216805] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.217755] Read of size 8 at addr ffff88801015e228 by task sshd/219 [ 39.218721] [ 39.218950] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.219815] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.220856] Call Trace: [ 39.221180] [ 39.221473] dump_stack_lvl+0x91/0xf0 [ 39.221977] print_report+0xcc/0x620 [ 39.222472] ? __virt_addr_valid+0x102/0x340 [ 39.223036] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.223659] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.224298] kasan_report+0xbe/0xf0 [ 39.224801] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.225426] vma_interval_tree_remove+0xc75/0xec0 [ 39.226041] vma_prepare+0xc54/0x11a0 [ 39.226522] __split_vma+0x5af/0x950 [ 39.227005] ? __pfx___split_vma+0x10/0x10 [ 39.227534] ? find_held_lock+0x2c/0x110 [ 39.228058] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.228646] ? lock_is_held_type+0x9f/0x120 [ 39.229188] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.229792] ? mtree_range_walk+0x632/0x900 [ 39.230350] ? mas_walk+0x5c7/0x7c0 [ 39.230826] do_vmi_munmap+0x1f1/0x2b0 [ 39.231324] mmap_region+0x1f9/0x2660 [ 39.231806] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.232339] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.233063] ? __pfx_lock_acquire+0x10/0x10 [ 39.233595] ? __pfx_mmap_region+0x10/0x10 [ 39.234128] ? security_mmap_addr+0x7d/0xa0 [ 39.234662] ? get_unmapped_area+0x1f5/0x3f0 [ 39.235215] do_mmap+0x854/0xf00 [ 39.235655] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.236164] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.236728] ksys_mmap_pgoff+0x3af/0x500 [ 39.237231] do_syscall_64+0x3f/0x90 [ 39.237709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.238364] RIP: 0033:0x7f672e292d82 [ 39.238828] 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 [ 39.240975] RSP: 002b:00007fff543c5fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.241893] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f672e292d82 [ 39.242746] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f672d6cc000 [ 39.243593] RBP: 00007f672d6cc000 R08: 0000000000000009 R09: 0000000000001000 [ 39.244450] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ef77a4980 [ 39.245292] R13: 00007fff543c5fd0 R14: 00007fff543c6000 R15: 00007fff543c6360 [ 39.246144] [ 39.246437] [ 39.246657] Allocated by task 212: [ 39.247092] kasan_save_stack+0x22/0x50 [ 39.247600] kasan_set_track+0x25/0x30 [ 39.248103] __kasan_slab_alloc+0x59/0x70 [ 39.248633] kmem_cache_alloc+0x16b/0x370 [ 39.249150] vm_area_dup+0x20/0x160 [ 39.249603] __split_vma+0x170/0x950 [ 39.250070] split_vma+0xc6/0x110 [ 39.250517] mprotect_fixup+0x8d2/0xb30 [ 39.251024] do_mprotect_pkey+0x87e/0xd40 [ 39.251547] __x64_sys_mprotect+0x78/0xc0 [ 39.252072] do_syscall_64+0x3f/0x90 [ 39.252570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.253210] [ 39.253423] Freed by task 212: [ 39.253819] kasan_save_stack+0x22/0x50 [ 39.254319] kasan_set_track+0x25/0x30 [ 39.254808] kasan_save_free_info+0x2b/0x50 [ 39.255339] __kasan_slab_free+0x10a/0x190 [ 39.255877] kmem_cache_free+0x10d/0x4d0 [ 39.256397] rcu_core+0x8c8/0x2860 [ 39.256839] __do_softirq+0x1b7/0x7d4 [ 39.257320] [ 39.257538] Last potentially related work creation: [ 39.258133] kasan_save_stack+0x22/0x50 [ 39.258632] __kasan_record_aux_stack+0x8e/0xa0 [ 39.259211] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.259850] remove_vma+0x139/0x170 [ 39.260314] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.260872] do_vmi_munmap+0x1f1/0x2b0 [ 39.261368] __vm_munmap+0x138/0x3a0 [ 39.261843] __x64_sys_munmap+0x59/0x80 [ 39.262335] do_syscall_64+0x3f/0x90 [ 39.262811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.263459] [ 39.263678] The buggy address belongs to the object at ffff88801015e1d0 [ 39.263678] which belongs to the cache vm_area_struct of size 168 [ 39.265160] The buggy address is located 88 bytes inside of [ 39.265160] freed 168-byte region [ffff88801015e1d0, ffff88801015e278) [ 39.266570] [ 39.266787] The buggy address belongs to the physical page: [ 39.267446] page:00000000493b3695 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1015e [ 39.268550] memcg:ffff88800fbe6601 [ 39.268986] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.269634] page_type: 0xffffffff() [ 39.270083] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.270997] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbe6601 [ 39.271902] page dumped because: kasan: bad access detected [ 39.272584] [ 39.272800] Memory state around the buggy address: [ 39.273377] ffff88801015e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.274229] ffff88801015e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.275093] >ffff88801015e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.275952] ^ [ 39.276521] ffff88801015e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.277373] ffff88801015e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.278246] ================================================================== [ 39.279373] Disabling lock debugging due to kernel taint [ 42.067917] BUG: Bad rss-counter state mm:00000000d66dd5d8 type:MM_FILEPAGES val:33 [ 42.069098] BUG: Bad rss-counter state mm:00000000d66dd5d8 type:MM_ANONPAGES val:22 [ 42.519054] BUG: Bad rss-counter state mm:00000000b04fe1e3 type:MM_FILEPAGES val:33 [ 42.520301] BUG: Bad rss-counter state mm:00000000b04fe1e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18260' (ECDSA) to the list of known hosts. 2023/06/21 05:54:54 fuzzer started 2023/06/21 05:54:54 dialing manager at localhost:36067 2023/06/21 05:54:55 checking machine... 2023/06/21 05:54:55 checking revisions... [ 43.251891] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:54:55 testing simple program... [ 43.301117] cgroup: Unknown subsys name 'net' [ 43.380728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:54:54 Registers: info registers vcpu 0 RAX=1ffff110011b2386 RBX=ffffffff852bfeb0 RCX=1ffff110011b4f21 RDX=1ffff1100d9c72c0 RSI=ffff888008d91bc0 RDI=ffff888008d91c30 RBP=ffff888008da7c38 RSP=ffff888008da7b08 R8 =0000000000000000 R9 =ffffed10011b4f25 R10=0000000000000003 R11=ffff888008c04000 R12=ffff88806ce39500 R13=ffff888008d91b40 R14=ffffffff852bfeb0 R15=0000000000000000 RIP=ffffffff8451e8d9 RFL=00000046 [---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 0000000000000000 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=00007f7550a0c000 CR3=000000000e402000 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=2034353a34353a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a34353a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81390b6d RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff81390b6d RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000009789 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88801670d1c0 R15=ffff88800ecdcac8 RIP=ffffffff84538440 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 00007f3f0ac74900 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=00007ffc786e2000 CR3=000000001bc94000 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=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