syzkaller login: [ 31.538593] BUG: Bad rss-counter state mm:00000000154b8523 type:MM_FILEPAGES val:33 [ 31.539989] BUG: Bad rss-counter state mm:00000000154b8523 type:MM_ANONPAGES val:22 [ 31.685121] ================================================================== [ 31.686233] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.687391] Read of size 8 at addr ffff88800e487df0 by task sshd/219 [ 31.688394] [ 31.688663] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.689729] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.690942] Call Trace: [ 31.691334] [ 31.691679] dump_stack_lvl+0x91/0xf0 [ 31.692279] print_report+0xcc/0x620 [ 31.692866] ? __virt_addr_valid+0x102/0x340 [ 31.693525] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.694179] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.694779] kasan_report+0xbe/0xf0 [ 31.695253] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.695873] vma_interval_tree_remove+0xc75/0xec0 [ 31.696472] vma_prepare+0xc54/0x11a0 [ 31.696957] __split_vma+0x5af/0x950 [ 31.697441] ? __pfx___split_vma+0x10/0x10 [ 31.697964] ? find_held_lock+0x2c/0x110 [ 31.698460] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.699005] ? lock_is_held_type+0x9f/0x120 [ 31.699525] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.700097] ? mtree_range_walk+0x632/0x900 [ 31.700623] ? mas_walk+0x5c7/0x7c0 [ 31.701074] do_vmi_munmap+0x1f1/0x2b0 [ 31.701540] mmap_region+0x1f9/0x2660 [ 31.701993] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.702481] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.703178] ? __pfx_lock_acquire+0x10/0x10 [ 31.703678] ? __pfx_mmap_region+0x10/0x10 [ 31.704183] ? security_mmap_addr+0x7d/0xa0 [ 31.704682] ? get_unmapped_area+0x1f5/0x3f0 [ 31.705202] do_mmap+0x854/0xf00 [ 31.705621] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.706090] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.706666] ksys_mmap_pgoff+0x3af/0x500 [ 31.707180] do_syscall_64+0x3f/0x90 [ 31.707664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.708312] RIP: 0033:0x7f5c5764ad82 [ 31.708764] 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 [ 31.710903] RSP: 002b:00007ffc09b65998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.711810] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c5764ad82 [ 31.712660] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c56a84000 [ 31.713509] RBP: 00007f5c56a84000 R08: 0000000000000009 R09: 0000000000001000 [ 31.714352] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572f7006f70 [ 31.715218] R13: 00007ffc09b659b0 R14: 00007ffc09b659e0 R15: 00007ffc09b65d40 [ 31.716072] [ 31.716366] [ 31.716581] Allocated by task 212: [ 31.717012] kasan_save_stack+0x22/0x50 [ 31.717518] kasan_set_track+0x25/0x30 [ 31.718012] __kasan_slab_alloc+0x59/0x70 [ 31.718544] kmem_cache_alloc+0x16b/0x370 [ 31.719068] vm_area_dup+0x20/0x160 [ 31.719526] __split_vma+0x170/0x950 [ 31.719986] split_vma+0xc6/0x110 [ 31.720418] mprotect_fixup+0x8d2/0xb30 [ 31.720920] do_mprotect_pkey+0x87e/0xd40 [ 31.721450] __x64_sys_mprotect+0x78/0xc0 [ 31.721983] do_syscall_64+0x3f/0x90 [ 31.722454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.723113] [ 31.723331] Freed by task 212: [ 31.723725] kasan_save_stack+0x22/0x50 [ 31.724233] kasan_set_track+0x25/0x30 [ 31.724728] kasan_save_free_info+0x2b/0x50 [ 31.725267] __kasan_slab_free+0x10a/0x190 [ 31.725786] kmem_cache_free+0x10d/0x4d0 [ 31.726300] rcu_core+0x8c8/0x2860 [ 31.726746] __do_softirq+0x1b7/0x7d4 [ 31.727241] [ 31.727459] Last potentially related work creation: [ 31.728040] kasan_save_stack+0x22/0x50 [ 31.728555] __kasan_record_aux_stack+0x8e/0xa0 [ 31.729132] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.729786] remove_vma+0x139/0x170 [ 31.730239] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.730790] do_vmi_munmap+0x1f1/0x2b0 [ 31.731305] __vm_munmap+0x138/0x3a0 [ 31.731771] __x64_sys_munmap+0x59/0x80 [ 31.732285] do_syscall_64+0x3f/0x90 [ 31.732760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.733398] [ 31.733622] Second to last potentially related work creation: [ 31.734296] kasan_save_stack+0x22/0x50 [ 31.734792] __kasan_record_aux_stack+0x8e/0xa0 [ 31.735381] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.736016] remove_vma+0x139/0x170 [ 31.736472] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.737037] do_vmi_munmap+0x1f1/0x2b0 [ 31.737534] mmap_region+0x1f9/0x2660 [ 31.738013] do_mmap+0x854/0xf00 [ 31.738451] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.738955] ksys_mmap_pgoff+0x7d/0x500 [ 31.739464] do_syscall_64+0x3f/0x90 [ 31.739948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.740611] [ 31.740832] The buggy address belongs to the object at ffff88800e487d98 [ 31.740832] which belongs to the cache vm_area_struct of size 168 [ 31.742355] The buggy address is located 88 bytes inside of [ 31.742355] freed 168-byte region [ffff88800e487d98, ffff88800e487e40) [ 31.743831] [ 31.744054] The buggy address belongs to the physical page: [ 31.744737] page:000000008a72bb60 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe487 [ 31.745858] memcg:ffff88800e42ab01 [ 31.746301] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.747031] page_type: 0xffffffff() [ 31.747497] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aa780 dead000000000003 [ 31.748453] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e42ab01 [ 31.749395] page dumped because: kasan: bad access detected [ 31.750079] [ 31.750300] Memory state around the buggy address: [ 31.750913] ffff88800e487c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.751800] ffff88800e487d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.752685] >ffff88800e487d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.753561] ^ [ 31.754395] ffff88800e487e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.755301] ffff88800e487e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.756178] ================================================================== [ 31.757267] Disabling lock debugging due to kernel taint [ 33.695949] BUG: Bad rss-counter state mm:00000000ee37582a type:MM_FILEPAGES val:33 [ 33.696727] BUG: Bad rss-counter state mm:00000000ee37582a type:MM_ANONPAGES val:22 [ 34.151425] BUG: Bad rss-counter state mm:00000000edad8e47 type:MM_FILEPAGES val:33 [ 34.152229] BUG: Bad rss-counter state mm:00000000edad8e47 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6919' (ECDSA) to the list of known hosts. 2023/06/20 17:29:10 fuzzer started 2023/06/20 17:29:10 dialing manager at localhost:36067 2023/06/20 17:29:10 checking machine... 2023/06/20 17:29:10 checking revisions... [ 34.802938] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:29:10 testing simple program... [ 34.842035] cgroup: Unknown subsys name 'net' [ 34.875904] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:29:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff818080db RCX=0000000000000001 RDX=1ffff11002b6deba RSI=ffff888015b6f980 RDI=ffffffff818080db RBP=ffffffff818080db RSP=ffff888015b6f528 R8 =0000000000000001 R9 =ffff888015b6f5b8 R10=0000000000038001 R11=0000000000021ee8 R12=0000000000000001 R13=0000000000000000 R14=ffff888014751b40 R15=0000000000092c40 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 00007f8e7d555700 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=00007fdb62490a20 CR3=0000000016642000 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=2039303a39323a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a39323a3731203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=ffff888008c04400 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=00007ffca3a72000 CR3=0000000016642000 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=39323a3731203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303134 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000