syzkaller login: [ 30.572580] BUG: Bad rss-counter state mm:00000000b81e41ae type:MM_FILEPAGES val:33 [ 30.573886] BUG: Bad rss-counter state mm:00000000b81e41ae type:MM_ANONPAGES val:22 [ 30.744120] ================================================================== [ 30.745208] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.746422] Read of size 8 at addr ffff888015ee7140 by task sshd/220 [ 30.747197] [ 30.747412] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.748291] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.749269] Call Trace: [ 30.749797] [ 30.750180] dump_stack_lvl+0x91/0xf0 [ 30.750798] print_report+0xcc/0x620 [ 30.751400] ? __virt_addr_valid+0x102/0x340 [ 30.752078] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.752843] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.753637] kasan_report+0xbe/0xf0 [ 30.754198] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.754824] vma_interval_tree_remove+0xc75/0xec0 [ 30.755432] vma_prepare+0xc54/0x11a0 [ 30.755916] __split_vma+0x5af/0x950 [ 30.756385] ? __pfx___split_vma+0x10/0x10 [ 30.756929] ? find_held_lock+0x2c/0x110 [ 30.757462] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.758026] ? lock_is_held_type+0x9f/0x120 [ 30.758562] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.759195] ? mtree_range_walk+0x632/0x900 [ 30.759756] ? mas_walk+0x5c7/0x7c0 [ 30.760238] do_vmi_munmap+0x1f1/0x2b0 [ 30.760733] mmap_region+0x1f9/0x2660 [ 30.761226] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.761758] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.762478] ? __pfx_lock_acquire+0x10/0x10 [ 30.763024] ? __pfx_mmap_region+0x10/0x10 [ 30.763560] ? security_mmap_addr+0x7d/0xa0 [ 30.764094] ? get_unmapped_area+0x1f5/0x3f0 [ 30.764648] do_mmap+0x854/0xf00 [ 30.765096] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.765614] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.766174] ksys_mmap_pgoff+0x3af/0x500 [ 30.766681] do_syscall_64+0x3f/0x90 [ 30.767161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.767810] RIP: 0033:0x7f18efea2d82 [ 30.768268] 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 [ 30.770424] RSP: 002b:00007ffd23eabea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.771331] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18efea2d82 [ 30.772182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18ef2dc000 [ 30.773047] RBP: 00007f18ef2dc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.773909] R10: 0000000000000812 R11: 0000000000000206 R12: 000055800521cec0 [ 30.774770] R13: 00007ffd23eabec0 R14: 00007ffd23eabef0 R15: 00007ffd23eac250 [ 30.775655] [ 30.775948] [ 30.776168] Allocated by task 213: [ 30.776602] kasan_save_stack+0x22/0x50 [ 30.777107] kasan_set_track+0x25/0x30 [ 30.777607] __kasan_slab_alloc+0x59/0x70 [ 30.778142] kmem_cache_alloc+0x16b/0x370 [ 30.778658] vm_area_dup+0x20/0x160 [ 30.779111] __split_vma+0x170/0x950 [ 30.779578] split_vma+0xc6/0x110 [ 30.780019] mprotect_fixup+0x8d2/0xb30 [ 30.780532] do_mprotect_pkey+0x87e/0xd40 [ 30.781050] __x64_sys_mprotect+0x78/0xc0 [ 30.781601] do_syscall_64+0x3f/0x90 [ 30.782083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782752] [ 30.782971] Freed by task 19: [ 30.783368] kasan_save_stack+0x22/0x50 [ 30.783887] kasan_set_track+0x25/0x30 [ 30.784400] kasan_save_free_info+0x2b/0x50 [ 30.784952] __kasan_slab_free+0x10a/0x190 [ 30.785503] kmem_cache_free+0x10d/0x4d0 [ 30.786012] rcu_core+0x8c8/0x2860 [ 30.786470] __do_softirq+0x1b7/0x7d4 [ 30.786954] [ 30.787184] Last potentially related work creation: [ 30.787783] kasan_save_stack+0x22/0x50 [ 30.788298] __kasan_record_aux_stack+0x8e/0xa0 [ 30.788900] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.789565] remove_vma+0x139/0x170 [ 30.790022] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.790595] do_vmi_munmap+0x1f1/0x2b0 [ 30.791096] __vm_munmap+0x138/0x3a0 [ 30.791569] __x64_sys_munmap+0x59/0x80 [ 30.792079] do_syscall_64+0x3f/0x90 [ 30.792560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.793221] [ 30.793454] The buggy address belongs to the object at ffff888015ee70e8 [ 30.793454] which belongs to the cache vm_area_struct of size 168 [ 30.794943] The buggy address is located 88 bytes inside of [ 30.794943] freed 168-byte region [ffff888015ee70e8, ffff888015ee7190) [ 30.796370] [ 30.796596] The buggy address belongs to the physical page: [ 30.797269] page:00000000a7a52811 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ee7 [ 30.798386] memcg:ffff888016b58e01 [ 30.798808] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.799478] page_type: 0xffffffff() [ 30.799946] raw: 0100000000000200 ffff88800879fc80 ffffea0000366240 dead000000000002 [ 30.800904] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b58e01 [ 30.801865] page dumped because: kasan: bad access detected [ 30.802548] [ 30.802774] Memory state around the buggy address: [ 30.803365] ffff888015ee7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.804235] ffff888015ee7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.805120] >ffff888015ee7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.806010] ^ [ 30.806668] ffff888015ee7180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.807539] ffff888015ee7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.808405] ================================================================== [ 30.809504] Disabling lock debugging due to kernel taint [ 33.258368] BUG: Bad rss-counter state mm:000000006a49fbd3 type:MM_FILEPAGES val:33 [ 33.259855] BUG: Bad rss-counter state mm:000000006a49fbd3 type:MM_ANONPAGES val:22 [ 33.829392] BUG: Bad rss-counter state mm:00000000b348fff0 type:MM_FILEPAGES val:33 [ 33.830585] BUG: Bad rss-counter state mm:00000000b348fff0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48633' (ECDSA) to the list of known hosts. 2023/06/19 15:53:35 fuzzer started 2023/06/19 15:53:36 dialing manager at localhost:44161 2023/06/19 15:53:36 checking machine... 2023/06/19 15:53:36 checking revisions... [ 34.486512] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:53:36 testing simple program... [ 34.531083] cgroup: Unknown subsys name 'net' [ 34.564269] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:53:35 Registers: info registers vcpu 0 RAX=1ffff1100139afdb RBX=ffff888009cd7ea8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888009cd7ed8 RBP=ffff8880086c0c60 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b5c9f R12=dffffc0000000000 R13=ffff888008dc0c38 R14=ffffffff813782a8 R15=ffff888008dc0c38 RIP=ffffffff81846362 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 00007f88fd9e7700 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=00007ffc953fe000 CR3=00000000099d0000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035333a3335 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303033 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fcc8603f000 CR3=00000000099d0000 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=2035333a33353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a33353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000