syzkaller login: [ 66.012475] BUG: Bad rss-counter state mm:000000005dde2cea type:MM_FILEPAGES val:33 [ 66.014530] BUG: Bad rss-counter state mm:000000005dde2cea type:MM_ANONPAGES val:22 [ 66.172741] ================================================================== [ 66.173635] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.174571] Read of size 8 at addr ffff88800ea63968 by task sshd/220 [ 66.175333] [ 66.175632] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 66.176494] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.177467] Call Trace: [ 66.177793] [ 66.178078] dump_stack_lvl+0x91/0xf0 [ 66.178571] print_report+0xcc/0x620 [ 66.179046] ? __virt_addr_valid+0x102/0x340 [ 66.179596] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.180205] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.180820] kasan_report+0xbe/0xf0 [ 66.181291] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.181911] vma_interval_tree_remove+0xc75/0xec0 [ 66.182537] vma_prepare+0xc54/0x11a0 [ 66.183022] __split_vma+0x5af/0x950 [ 66.183490] ? __pfx___split_vma+0x10/0x10 [ 66.184017] ? find_held_lock+0x2c/0x110 [ 66.184549] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.185120] ? lock_is_held_type+0x9f/0x120 [ 66.185646] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.186246] ? mtree_range_walk+0x632/0x900 [ 66.186794] ? mas_walk+0x5c7/0x7c0 [ 66.187269] do_vmi_munmap+0x1f1/0x2b0 [ 66.187760] mmap_region+0x1f9/0x2660 [ 66.188239] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.188742] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.189442] ? __pfx_lock_acquire+0x10/0x10 [ 66.189980] ? __pfx_mmap_region+0x10/0x10 [ 66.190521] ? security_mmap_addr+0x7d/0xa0 [ 66.191053] ? get_unmapped_area+0x1f5/0x3f0 [ 66.191593] do_mmap+0x854/0xf00 [ 66.192029] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.192525] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.193075] ksys_mmap_pgoff+0x3af/0x500 [ 66.193575] do_syscall_64+0x3f/0x90 [ 66.194042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.194689] RIP: 0033:0x7f19d43afd82 [ 66.195139] 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 [ 66.197228] RSP: 002b:00007fffcadd0178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.198131] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19d43afd82 [ 66.199000] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19d37e9000 [ 66.199851] RBP: 00007f19d37e9000 R08: 0000000000000009 R09: 0000000000001000 [ 66.200684] R10: 0000000000000812 R11: 0000000000000206 R12: 000056152ef55f70 [ 66.201530] R13: 00007fffcadd0190 R14: 00007fffcadd01c0 R15: 00007fffcadd0520 [ 66.202381] [ 66.202687] [ 66.202898] Allocated by task 213: [ 66.203328] kasan_save_stack+0x22/0x50 [ 66.203831] kasan_set_track+0x25/0x30 [ 66.204327] __kasan_slab_alloc+0x59/0x70 [ 66.204850] kmem_cache_alloc+0x16b/0x370 [ 66.205363] vm_area_dup+0x20/0x160 [ 66.205813] __split_vma+0x170/0x950 [ 66.206276] split_vma+0xc6/0x110 [ 66.206724] mprotect_fixup+0x8d2/0xb30 [ 66.207244] do_mprotect_pkey+0x87e/0xd40 [ 66.207756] __x64_sys_mprotect+0x78/0xc0 [ 66.208275] do_syscall_64+0x3f/0x90 [ 66.208755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.209402] [ 66.209616] Freed by task 213: [ 66.210011] kasan_save_stack+0x22/0x50 [ 66.210526] kasan_set_track+0x25/0x30 [ 66.211026] kasan_save_free_info+0x2b/0x50 [ 66.211560] __kasan_slab_free+0x10a/0x190 [ 66.212094] kmem_cache_free+0x10d/0x4d0 [ 66.212603] rcu_core+0x8c8/0x2860 [ 66.213049] __do_softirq+0x1b7/0x7d4 [ 66.213528] [ 66.213744] Last potentially related work creation: [ 66.214334] kasan_save_stack+0x22/0x50 [ 66.214841] __kasan_record_aux_stack+0x8e/0xa0 [ 66.215414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.216050] remove_vma+0x139/0x170 [ 66.216502] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.217053] do_vmi_munmap+0x1f1/0x2b0 [ 66.217542] __vm_munmap+0x138/0x3a0 [ 66.218011] __x64_sys_munmap+0x59/0x80 [ 66.218511] do_syscall_64+0x3f/0x90 [ 66.218992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.219624] [ 66.219840] The buggy address belongs to the object at ffff88800ea63910 [ 66.219840] which belongs to the cache vm_area_struct of size 168 [ 66.221310] The buggy address is located 88 bytes inside of [ 66.221310] freed 168-byte region [ffff88800ea63910, ffff88800ea639b8) [ 66.222732] [ 66.222950] The buggy address belongs to the physical page: [ 66.223611] page:000000005921d4cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea63 [ 66.224686] memcg:ffff88800f2c4901 [ 66.225122] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.225757] page_type: 0xffffffff() [ 66.226209] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 66.227126] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2c4901 [ 66.228030] page dumped because: kasan: bad access detected [ 66.228678] [ 66.228894] Memory state around the buggy address: [ 66.229468] ffff88800ea63800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 66.230315] ffff88800ea63880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 66.231183] >ffff88800ea63900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.232028] ^ [ 66.232812] ffff88800ea63980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 66.233653] ffff88800ea63a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.234514] ================================================================== [ 66.235488] Disabling lock debugging due to kernel taint [ 68.945746] BUG: Bad rss-counter state mm:00000000961dcbb4 type:MM_FILEPAGES val:33 [ 68.946957] BUG: Bad rss-counter state mm:00000000961dcbb4 type:MM_ANONPAGES val:22 [ 69.357104] BUG: Bad rss-counter state mm:00000000539454ea type:MM_FILEPAGES val:33 [ 69.358329] BUG: Bad rss-counter state mm:00000000539454ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44154' (ECDSA) to the list of known hosts. 2023/06/19 23:09:25 fuzzer started 2023/06/19 23:09:26 dialing manager at localhost:44161 2023/06/19 23:09:26 checking machine... 2023/06/19 23:09:26 checking revisions... [ 70.055012] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:09:26 testing simple program... [ 70.104359] cgroup: Unknown subsys name 'net' [ 70.195875] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:09:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888019e77580 RCX=0000000000000001 RDX=1ffff110033ceebb RSI=ffff888019e77de0 RDI=ffff888019e77580 RBP=ffff888019e775d8 RSP=ffff888019e77568 R8 =0000000000000001 R9 =ffff888019e775c0 R10=0000000000038001 R11=000000000008ab54 R12=ffff888019e77648 R13=0000000000000000 R14=ffff888015d79b40 R15=ffff88800d8dab00 RIP=ffffffff8113038e 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 00007f3e12a38700 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=00007fcf5cace1c0 CR3=000000000fa82000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36333737342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363337 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=0000000000000000 RBX=ffff8880168951c0 RCX=0000000000000000 RDX=1ffff11002d12ab7 RSI=ffffffff814c84fa RDI=ffff8880168955b8 RBP=ffff8880168951c0 RSP=ffff888019f57888 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff8880168951c0 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff888015fbc000 RIP=ffffffff81374531 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 00007f524a732900 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=00007ffc6fdcf000 CR3=000000001a2e0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000