syzkaller login: [ 29.155564] BUG: Bad rss-counter state mm:00000000233b871e type:MM_FILEPAGES val:33 [ 29.157113] BUG: Bad rss-counter state mm:00000000233b871e type:MM_ANONPAGES val:22 [ 29.303388] ================================================================== [ 29.304358] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.305366] Read of size 8 at addr ffff88800e7476b0 by task sshd/220 [ 29.306178] [ 29.306553] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.307511] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.308548] Call Trace: [ 29.308917] [ 29.309213] dump_stack_lvl+0x91/0xf0 [ 29.309741] print_report+0xcc/0x620 [ 29.310285] ? __virt_addr_valid+0x102/0x340 [ 29.310886] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.311533] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.312188] kasan_report+0xbe/0xf0 [ 29.312712] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.313386] vma_interval_tree_remove+0xc75/0xec0 [ 29.314032] vma_prepare+0xc54/0x11a0 [ 29.314559] __split_vma+0x5af/0x950 [ 29.315072] ? __pfx___split_vma+0x10/0x10 [ 29.315646] ? find_held_lock+0x2c/0x110 [ 29.316219] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.316812] ? lock_is_held_type+0x9f/0x120 [ 29.317403] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.318054] ? mtree_range_walk+0x632/0x900 [ 29.318676] ? mas_walk+0x5c7/0x7c0 [ 29.319196] do_vmi_munmap+0x1f1/0x2b0 [ 29.319726] mmap_region+0x1f9/0x2660 [ 29.320257] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.320787] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.321508] ? __pfx_lock_acquire+0x10/0x10 [ 29.322041] ? __pfx_mmap_region+0x10/0x10 [ 29.322612] ? security_mmap_addr+0x7d/0xa0 [ 29.323190] ? get_unmapped_area+0x1f5/0x3f0 [ 29.323740] do_mmap+0x854/0xf00 [ 29.324180] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.324671] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.325243] ksys_mmap_pgoff+0x3af/0x500 [ 29.325760] do_syscall_64+0x3f/0x90 [ 29.326249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.326967] RIP: 0033:0x7f1e855ddd82 [ 29.327456] 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 [ 29.329750] RSP: 002b:00007ffedbd5d828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.330758] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e855ddd82 [ 29.331672] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e84a17000 [ 29.332582] RBP: 00007f1e84a17000 R08: 0000000000000009 R09: 0000000000001000 [ 29.333502] R10: 0000000000000812 R11: 0000000000000206 R12: 000055702b423f60 [ 29.334404] R13: 00007ffedbd5d840 R14: 00007ffedbd5d870 R15: 00007ffedbd5dbd0 [ 29.335325] [ 29.335646] [ 29.335893] Allocated by task 213: [ 29.336345] kasan_save_stack+0x22/0x50 [ 29.336885] kasan_set_track+0x25/0x30 [ 29.337429] __kasan_slab_alloc+0x59/0x70 [ 29.337990] kmem_cache_alloc+0x16b/0x370 [ 29.338577] vm_area_dup+0x20/0x160 [ 29.339062] __split_vma+0x170/0x950 [ 29.339561] split_vma+0xc6/0x110 [ 29.340041] mprotect_fixup+0x8d2/0xb30 [ 29.340593] do_mprotect_pkey+0x87e/0xd40 [ 29.341147] __x64_sys_mprotect+0x78/0xc0 [ 29.341703] do_syscall_64+0x3f/0x90 [ 29.342207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.342927] [ 29.343143] Freed by task 211: [ 29.343532] kasan_save_stack+0x22/0x50 [ 29.344038] kasan_set_track+0x25/0x30 [ 29.344528] kasan_save_free_info+0x2b/0x50 [ 29.345072] __kasan_slab_free+0x10a/0x190 [ 29.345659] kmem_cache_free+0x10d/0x4d0 [ 29.346178] rcu_core+0x8c8/0x2860 [ 29.346637] __do_softirq+0x1b7/0x7d4 [ 29.347121] [ 29.347341] Last potentially related work creation: [ 29.348019] kasan_save_stack+0x22/0x50 [ 29.348546] __kasan_record_aux_stack+0x8e/0xa0 [ 29.349156] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.349848] remove_vma+0x139/0x170 [ 29.350345] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.350949] do_vmi_munmap+0x1f1/0x2b0 [ 29.351467] __vm_munmap+0x138/0x3a0 [ 29.351976] __x64_sys_munmap+0x59/0x80 [ 29.352505] do_syscall_64+0x3f/0x90 [ 29.353019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.353706] [ 29.353938] Second to last potentially related work creation: [ 29.354673] kasan_save_stack+0x22/0x50 [ 29.355212] __kasan_record_aux_stack+0x8e/0xa0 [ 29.355833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.356524] remove_vma+0x139/0x170 [ 29.357016] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.357614] do_vmi_munmap+0x1f1/0x2b0 [ 29.358140] mmap_region+0x1f9/0x2660 [ 29.358664] do_mmap+0x854/0xf00 [ 29.359130] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.359654] ksys_mmap_pgoff+0x3af/0x500 [ 29.360192] do_syscall_64+0x3f/0x90 [ 29.360689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.361385] [ 29.361630] The buggy address belongs to the object at ffff88800e747658 [ 29.361630] which belongs to the cache vm_area_struct of size 168 [ 29.363234] The buggy address is located 88 bytes inside of [ 29.363234] freed 168-byte region [ffff88800e747658, ffff88800e747700) [ 29.364754] [ 29.364990] The buggy address belongs to the physical page: [ 29.365680] page:000000007e8dc9b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe747 [ 29.366862] memcg:ffff88800e63b401 [ 29.367326] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.368060] page_type: 0xffffffff() [ 29.368511] raw: 0100000000000200 ffff88800879fc80 ffffea000038e800 dead000000000003 [ 29.369425] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e63b401 [ 29.370323] page dumped because: kasan: bad access detected [ 29.370987] [ 29.371201] Memory state around the buggy address: [ 29.371776] ffff88800e747580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.372668] ffff88800e747600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.373532] >ffff88800e747680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.374410] ^ [ 29.375058] ffff88800e747700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 29.375902] ffff88800e747780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.376740] ================================================================== [ 29.377668] Disabling lock debugging due to kernel taint [ 31.385348] BUG: Bad rss-counter state mm:0000000009e209c6 type:MM_FILEPAGES val:33 [ 31.386522] BUG: Bad rss-counter state mm:0000000009e209c6 type:MM_ANONPAGES val:22 [ 31.884355] BUG: Bad rss-counter state mm:00000000a871ed9e type:MM_FILEPAGES val:33 [ 31.885566] BUG: Bad rss-counter state mm:00000000a871ed9e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18622' (ECDSA) to the list of known hosts. 2023/06/19 23:24:19 fuzzer started 2023/06/19 23:24:19 dialing manager at localhost:44161 2023/06/19 23:24:19 checking machine... 2023/06/19 23:24:19 checking revisions... [ 32.618009] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:24:19 testing simple program... [ 32.733229] cgroup: Unknown subsys name 'net' [ 32.797533] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:24:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f32e2af2780 CR3=000000000c7d6000 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=2038313a34323a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a34323a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8614d396 RDX=1ffff11001c76f38 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800e3b79d0 RSP=ffff88800e3b7908 R8 =ffffffff8614d39a R9 =ffff88800e3b79b8 R10=0000000000038001 R11=00000000000247ec R12=ffff88800e3b79d8 R13=ffff88800e3b79c0 R14=0000000000000005 R15=ffff88800e3b7978 RIP=ffffffff81130b54 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 00007fce633c4900 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=00007fce6397b618 CR3=000000001687c000 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