syzkaller login: [ 35.595525] BUG: Bad rss-counter state mm:00000000c52f0b50 type:MM_FILEPAGES val:33 [ 35.596531] BUG: Bad rss-counter state mm:00000000c52f0b50 type:MM_ANONPAGES val:22 [ 35.759334] ================================================================== [ 35.760229] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.761161] Read of size 8 at addr ffff88800e083a50 by task sshd/218 [ 35.761930] [ 35.762148] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.763151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.764107] Call Trace: [ 35.764425] [ 35.764708] dump_stack_lvl+0x91/0xf0 [ 35.765204] print_report+0xcc/0x620 [ 35.765680] ? __virt_addr_valid+0x102/0x340 [ 35.766252] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.766864] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.767476] kasan_report+0xbe/0xf0 [ 35.767948] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.768565] vma_interval_tree_remove+0xc75/0xec0 [ 35.769171] vma_prepare+0xc54/0x11a0 [ 35.769666] __split_vma+0x5af/0x950 [ 35.770162] ? __pfx___split_vma+0x10/0x10 [ 35.770707] ? find_held_lock+0x2c/0x110 [ 35.771249] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.771830] ? lock_is_held_type+0x9f/0x120 [ 35.772386] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.773013] ? mtree_range_walk+0x632/0x900 [ 35.773582] ? mas_walk+0x5c7/0x7c0 [ 35.774085] do_vmi_munmap+0x1f1/0x2b0 [ 35.774594] mmap_region+0x1f9/0x2660 [ 35.775090] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.775611] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.776352] ? __pfx_lock_acquire+0x10/0x10 [ 35.776903] ? __pfx_mmap_region+0x10/0x10 [ 35.777463] ? security_mmap_addr+0x7d/0xa0 [ 35.778025] ? get_unmapped_area+0x1f5/0x3f0 [ 35.778591] do_mmap+0x854/0xf00 [ 35.779049] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.779558] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.780138] ksys_mmap_pgoff+0x3af/0x500 [ 35.780659] do_syscall_64+0x3f/0x90 [ 35.781160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.781837] RIP: 0033:0x7feb0709dd82 [ 35.782336] 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 [ 35.784547] RSP: 002b:00007ffd62427fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.785488] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb0709dd82 [ 35.786382] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb064d7000 [ 35.787256] RBP: 00007feb064d7000 R08: 0000000000000009 R09: 0000000000001000 [ 35.788140] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563994ec0ec0 [ 35.789035] R13: 00007ffd62427fd0 R14: 00007ffd62428000 R15: 00007ffd62428360 [ 35.789948] [ 35.790253] [ 35.790483] Allocated by task 211: [ 35.790932] kasan_save_stack+0x22/0x50 [ 35.791452] kasan_set_track+0x25/0x30 [ 35.791962] __kasan_slab_alloc+0x59/0x70 [ 35.792505] kmem_cache_alloc+0x16b/0x370 [ 35.793031] vm_area_dup+0x20/0x160 [ 35.793502] __split_vma+0x170/0x950 [ 35.794001] split_vma+0xc6/0x110 [ 35.794447] mprotect_fixup+0x8d2/0xb30 [ 35.794961] do_mprotect_pkey+0x87e/0xd40 [ 35.795502] __x64_sys_mprotect+0x78/0xc0 [ 35.796053] do_syscall_64+0x3f/0x90 [ 35.796546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.797210] [ 35.797432] Freed by task 202: [ 35.797838] kasan_save_stack+0x22/0x50 [ 35.798368] kasan_set_track+0x25/0x30 [ 35.798876] kasan_save_free_info+0x2b/0x50 [ 35.799432] __kasan_slab_free+0x10a/0x190 [ 35.799986] kmem_cache_free+0x10d/0x4d0 [ 35.800510] rcu_core+0x8c8/0x2860 [ 35.800969] __do_softirq+0x1b7/0x7d4 [ 35.801461] [ 35.801685] Last potentially related work creation: [ 35.802300] kasan_save_stack+0x22/0x50 [ 35.802822] __kasan_record_aux_stack+0x8e/0xa0 [ 35.803484] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.804151] remove_vma+0x139/0x170 [ 35.804623] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.805195] do_vmi_munmap+0x1f1/0x2b0 [ 35.805694] __vm_munmap+0x138/0x3a0 [ 35.806184] __x64_sys_munmap+0x59/0x80 [ 35.806696] do_syscall_64+0x3f/0x90 [ 35.807187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.807853] [ 35.808078] Second to last potentially related work creation: [ 35.808783] kasan_save_stack+0x22/0x50 [ 35.809301] __kasan_record_aux_stack+0x8e/0xa0 [ 35.809893] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.810556] remove_vma+0x139/0x170 [ 35.811027] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.811610] do_vmi_munmap+0x1f1/0x2b0 [ 35.812112] mmap_region+0x1f9/0x2660 [ 35.812610] do_mmap+0x854/0xf00 [ 35.813056] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.813555] ksys_mmap_pgoff+0x3af/0x500 [ 35.814089] do_syscall_64+0x3f/0x90 [ 35.814581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.815252] [ 35.815476] The buggy address belongs to the object at ffff88800e0839f8 [ 35.815476] which belongs to the cache vm_area_struct of size 168 [ 35.816996] The buggy address is located 88 bytes inside of [ 35.816996] freed 168-byte region [ffff88800e0839f8, ffff88800e083aa0) [ 35.818453] [ 35.818667] The buggy address belongs to the physical page: [ 35.819346] page:000000002f58a9bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe083 [ 35.820417] memcg:ffff88800d9a5701 [ 35.820840] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.821529] page_type: 0xffffffff() [ 35.822000] raw: 0100000000000200 ffff8880087a0c80 ffffea0000371c00 dead000000000009 [ 35.822909] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9a5701 [ 35.823812] page dumped because: kasan: bad access detected [ 35.824460] [ 35.824672] Memory state around the buggy address: [ 35.825249] ffff88800e083900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.826102] ffff88800e083980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.826961] >ffff88800e083a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.827864] ^ [ 35.828597] ffff88800e083a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 35.829489] ffff88800e083b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.830434] ================================================================== [ 35.831408] Disabling lock debugging due to kernel taint [ 37.904180] BUG: Bad rss-counter state mm:00000000bb62ecac type:MM_FILEPAGES val:33 [ 37.905347] BUG: Bad rss-counter state mm:00000000bb62ecac type:MM_ANONPAGES val:22 [ 38.294130] BUG: Bad rss-counter state mm:00000000f189bc1f type:MM_FILEPAGES val:33 [ 38.295205] BUG: Bad rss-counter state mm:00000000f189bc1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17417' (ECDSA) to the list of known hosts. 2023/06/20 14:51:31 fuzzer started 2023/06/20 14:51:31 dialing manager at localhost:36067 2023/06/20 14:51:31 checking machine... 2023/06/20 14:51:31 checking revisions... [ 38.951002] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:51:31 testing simple program... [ 38.983485] cgroup: Unknown subsys name 'net' [ 39.030767] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:51:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880146ff418 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff8880146ff470 RSP=ffff8880146ff400 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880146ff4e0 R13=0000000000000000 R14=ffff88800faa8000 R15=0000000000092cc0 RIP=ffffffff81130399 RFL=00000203 [------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 00007f452835a900 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=00007fd2b3123650 CR3=000000000d752000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=3e4fc6015c74276500000000000ae988 XMM05=1abfb93db13a29550000000000133878 XMM06=bdf2e299e47b49d500000000001322f8 XMM07=fb795ef6d657705600000000001215a0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff888010031f34 RBP=ffff888010031b40 RSP=ffff8880145bf1b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888010031b40 R13=0000000000000000 R14=ffffffff85652c08 R15=00000000000928c0 RIP=ffffffff8137450d 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 00007fd2b2b6e900 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=00007fd2b3125618 CR3=000000000eb2e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000