syzkaller login: [ 31.632986] BUG: Bad rss-counter state mm:00000000bcb849d7 type:MM_FILEPAGES val:33 [ 31.634165] BUG: Bad rss-counter state mm:00000000bcb849d7 type:MM_ANONPAGES val:22 [ 31.786602] ================================================================== [ 31.787522] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.788488] Read of size 8 at addr ffff888009a41798 by task sshd/221 [ 31.789255] [ 31.789484] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.790536] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.791537] Call Trace: [ 31.791883] [ 31.792175] dump_stack_lvl+0x91/0xf0 [ 31.792687] print_report+0xcc/0x620 [ 31.793190] ? __virt_addr_valid+0x102/0x340 [ 31.793753] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.794381] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.795005] kasan_report+0xbe/0xf0 [ 31.795490] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.796125] vma_interval_tree_remove+0xc75/0xec0 [ 31.796742] vma_prepare+0xc54/0x11a0 [ 31.797222] __split_vma+0x5af/0x950 [ 31.797700] ? __pfx___split_vma+0x10/0x10 [ 31.798225] ? find_held_lock+0x2c/0x110 [ 31.798753] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.799324] ? lock_is_held_type+0x9f/0x120 [ 31.799892] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.800503] ? mtree_range_walk+0x632/0x900 [ 31.801067] ? mas_walk+0x5c7/0x7c0 [ 31.801556] do_vmi_munmap+0x1f1/0x2b0 [ 31.802063] mmap_region+0x1f9/0x2660 [ 31.802551] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.803068] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.803796] ? __pfx_lock_acquire+0x10/0x10 [ 31.804338] ? __pfx_mmap_region+0x10/0x10 [ 31.804874] ? security_mmap_addr+0x7d/0xa0 [ 31.805416] ? get_unmapped_area+0x1f5/0x3f0 [ 31.805976] do_mmap+0x854/0xf00 [ 31.806422] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.806928] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.807506] ksys_mmap_pgoff+0x3af/0x500 [ 31.808037] do_syscall_64+0x3f/0x90 [ 31.808530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.809191] RIP: 0033:0x7f42a5507d82 [ 31.809656] 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 [ 31.811836] RSP: 002b:00007fff22c5fe68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.812815] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42a5507d82 [ 31.813740] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f42a4941000 [ 31.814649] RBP: 00007f42a4941000 R08: 0000000000000009 R09: 0000000000001000 [ 31.815581] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a1f7b82ec0 [ 31.816497] R13: 00007fff22c5fe80 R14: 00007fff22c5feb0 R15: 00007fff22c60210 [ 31.817428] [ 31.817733] [ 31.817957] Allocated by task 214: [ 31.818404] kasan_save_stack+0x22/0x50 [ 31.818933] kasan_set_track+0x25/0x30 [ 31.819462] __kasan_slab_alloc+0x59/0x70 [ 31.820027] kmem_cache_alloc+0x16b/0x370 [ 31.820591] vm_area_dup+0x20/0x160 [ 31.821046] __split_vma+0x170/0x950 [ 31.821513] split_vma+0xc6/0x110 [ 31.821957] mprotect_fixup+0x8d2/0xb30 [ 31.822458] do_mprotect_pkey+0x87e/0xd40 [ 31.822973] __x64_sys_mprotect+0x78/0xc0 [ 31.823494] do_syscall_64+0x3f/0x90 [ 31.823975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.824615] [ 31.824833] Freed by task 214: [ 31.825226] kasan_save_stack+0x22/0x50 [ 31.825729] kasan_set_track+0x25/0x30 [ 31.826216] kasan_save_free_info+0x2b/0x50 [ 31.826749] __kasan_slab_free+0x10a/0x190 [ 31.827281] kmem_cache_free+0x10d/0x4d0 [ 31.827801] rcu_core+0x8c8/0x2860 [ 31.828243] __do_softirq+0x1b7/0x7d4 [ 31.828717] [ 31.828930] Last potentially related work creation: [ 31.829518] kasan_save_stack+0x22/0x50 [ 31.830017] __kasan_record_aux_stack+0x8e/0xa0 [ 31.830601] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.831317] remove_vma+0x139/0x170 [ 31.831783] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.832334] do_vmi_munmap+0x1f1/0x2b0 [ 31.832883] __vm_munmap+0x138/0x3a0 [ 31.833367] __x64_sys_munmap+0x59/0x80 [ 31.833891] do_syscall_64+0x3f/0x90 [ 31.834391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.835065] [ 31.835287] The buggy address belongs to the object at ffff888009a41740 [ 31.835287] which belongs to the cache vm_area_struct of size 168 [ 31.836827] The buggy address is located 88 bytes inside of [ 31.836827] freed 168-byte region [ffff888009a41740, ffff888009a417e8) [ 31.838302] [ 31.838526] The buggy address belongs to the physical page: [ 31.839221] page:00000000e3b156a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a41 [ 31.840361] memcg:ffff888018a83b01 [ 31.840804] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.841475] page_type: 0xffffffff() [ 31.841949] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.842921] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018a83b01 [ 31.843881] page dumped because: kasan: bad access detected [ 31.844578] [ 31.844798] Memory state around the buggy address: [ 31.845408] ffff888009a41680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.846312] ffff888009a41700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.847213] >ffff888009a41780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.848114] ^ [ 31.848627] ffff888009a41800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.849518] ffff888009a41880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.850407] ================================================================== [ 31.851369] Disabling lock debugging due to kernel taint [ 33.720759] BUG: Bad rss-counter state mm:00000000fe69e371 type:MM_FILEPAGES val:33 [ 33.721526] BUG: Bad rss-counter state mm:00000000fe69e371 type:MM_ANONPAGES val:22 [ 34.256177] BUG: Bad rss-counter state mm:000000003978c18f type:MM_FILEPAGES val:33 [ 34.257367] BUG: Bad rss-counter state mm:000000003978c18f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38603' (ECDSA) to the list of known hosts. 2023/06/20 15:09:31 fuzzer started 2023/06/20 15:09:32 dialing manager at localhost:36067 2023/06/20 15:09:32 checking machine... 2023/06/20 15:09:32 checking revisions... [ 34.890371] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:09:32 testing simple program... [ 34.941432] cgroup: Unknown subsys name 'net' [ 34.994195] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:09:31 Registers: info registers vcpu 0 RAX=0000000000000030 RBX=000055846868feb0 RCX=0000000000000022 RDX=00007f2d8c6584a0 RSI=00007f2d8c080b22 RDI=000055846868feb0 RBP=000000000000000c RSP=00007fff15a7cc98 R8 =00005584686bcf27 R9 =00007f2d8c657be0 R10=0000000000000100 R11=0000000000000246 R12=00005584686aded0 R13=00007fff15a7cca8 R14=00007f2d8c080b22 R15=00007f2d8c0a5710 RIP=00007f2d8c5f54fa RFL=00000283 [--S---C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2d8c0a5900 00000000 00000000 GS =0000 0000000000000000 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=00007fff15a77000 CR3=0000000019a64000 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=23232323232323232323232323232323 XMM01=00000053000002a03b031b01003d0920 XMM02=ffffffffffffff00ffff000000000000 XMM03=687320000075730909454d414e5f5553 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffff0000ffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f5940208a40 CR3=000000000e9f4000 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=2031333a39303a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a39303a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000