syzkaller login: [ 36.181067] BUG: Bad rss-counter state mm:00000000b140e793 type:MM_FILEPAGES val:33 [ 36.182549] BUG: Bad rss-counter state mm:00000000b140e793 type:MM_ANONPAGES val:22 [ 36.361622] ================================================================== [ 36.362769] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.363963] Read of size 8 at addr ffff88800cc57058 by task sshd/220 [ 36.364956] [ 36.365174] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.366058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.367090] Call Trace: [ 36.367414] [ 36.367702] dump_stack_lvl+0x91/0xf0 [ 36.368209] print_report+0xcc/0x620 [ 36.368721] ? __virt_addr_valid+0x102/0x340 [ 36.369285] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.369923] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.370562] kasan_report+0xbe/0xf0 [ 36.371090] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.371738] vma_interval_tree_remove+0xc75/0xec0 [ 36.372355] vma_prepare+0xc54/0x11a0 [ 36.372866] __split_vma+0x5af/0x950 [ 36.373358] ? __pfx___split_vma+0x10/0x10 [ 36.373896] ? find_held_lock+0x2c/0x110 [ 36.374436] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.375045] ? lock_is_held_type+0x9f/0x120 [ 36.375608] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.376230] ? mtree_range_walk+0x632/0x900 [ 36.376803] ? mas_walk+0x5c7/0x7c0 [ 36.377305] do_vmi_munmap+0x1f1/0x2b0 [ 36.377809] mmap_region+0x1f9/0x2660 [ 36.378316] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.378871] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.379625] ? __pfx_lock_acquire+0x10/0x10 [ 36.380161] ? __pfx_mmap_region+0x10/0x10 [ 36.380733] ? security_mmap_addr+0x7d/0xa0 [ 36.381287] ? get_unmapped_area+0x1f5/0x3f0 [ 36.381849] do_mmap+0x854/0xf00 [ 36.382312] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.382822] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.383428] ksys_mmap_pgoff+0x3af/0x500 [ 36.383940] do_syscall_64+0x3f/0x90 [ 36.384426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.385130] RIP: 0033:0x7f75f3540d82 [ 36.385602] 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 [ 36.387827] RSP: 002b:00007ffdb0bb8c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.388758] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75f3540d82 [ 36.389636] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75f297a000 [ 36.390492] RBP: 00007f75f297a000 R08: 0000000000000009 R09: 0000000000001000 [ 36.391395] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570d9866ec0 [ 36.392252] R13: 00007ffdb0bb8c90 R14: 00007ffdb0bb8cc0 R15: 00007ffdb0bb9020 [ 36.393138] [ 36.393437] [ 36.393661] Allocated by task 213: [ 36.394100] kasan_save_stack+0x22/0x50 [ 36.394621] kasan_set_track+0x25/0x30 [ 36.395156] __kasan_slab_alloc+0x59/0x70 [ 36.395695] kmem_cache_alloc+0x16b/0x370 [ 36.396220] vm_area_dup+0x20/0x160 [ 36.396728] __split_vma+0x170/0x950 [ 36.397211] split_vma+0xc6/0x110 [ 36.397659] mprotect_fixup+0x8d2/0xb30 [ 36.398175] do_mprotect_pkey+0x87e/0xd40 [ 36.398708] __x64_sys_mprotect+0x78/0xc0 [ 36.399273] do_syscall_64+0x3f/0x90 [ 36.399766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.400421] [ 36.400647] Freed by task 213: [ 36.401047] kasan_save_stack+0x22/0x50 [ 36.401569] kasan_set_track+0x25/0x30 [ 36.402077] kasan_save_free_info+0x2b/0x50 [ 36.402623] __kasan_slab_free+0x10a/0x190 [ 36.403191] kmem_cache_free+0x10d/0x4d0 [ 36.403722] rcu_core+0x8c8/0x2860 [ 36.404181] __do_softirq+0x1b7/0x7d4 [ 36.404701] [ 36.405000] Last potentially related work creation: [ 36.405614] kasan_save_stack+0x22/0x50 [ 36.406126] __kasan_record_aux_stack+0x8e/0xa0 [ 36.406709] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.407418] remove_vma+0x139/0x170 [ 36.407885] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.408445] do_vmi_munmap+0x1f1/0x2b0 [ 36.408958] __vm_munmap+0x138/0x3a0 [ 36.409438] __x64_sys_munmap+0x59/0x80 [ 36.409947] do_syscall_64+0x3f/0x90 [ 36.410430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.411127] [ 36.411350] Second to last potentially related work creation: [ 36.412063] kasan_save_stack+0x22/0x50 [ 36.412604] __kasan_record_aux_stack+0x8e/0xa0 [ 36.413190] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.413841] remove_vma+0x139/0x170 [ 36.414301] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.414909] do_vmi_munmap+0x1f1/0x2b0 [ 36.415420] mmap_region+0x1f9/0x2660 [ 36.415907] do_mmap+0x854/0xf00 [ 36.416341] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.416859] ksys_mmap_pgoff+0x3af/0x500 [ 36.417368] do_syscall_64+0x3f/0x90 [ 36.417860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.418520] [ 36.418742] The buggy address belongs to the object at ffff88800cc57000 [ 36.418742] which belongs to the cache vm_area_struct of size 168 [ 36.420261] The buggy address is located 88 bytes inside of [ 36.420261] freed 168-byte region [ffff88800cc57000, ffff88800cc570a8) [ 36.421697] [ 36.421912] The buggy address belongs to the physical page: [ 36.422582] page:0000000041379175 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc57 [ 36.423735] memcg:ffff888009038d01 [ 36.424180] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.424918] page_type: 0xffffffff() [ 36.425378] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 36.426330] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009038d01 [ 36.427291] page dumped because: kasan: bad access detected [ 36.427975] [ 36.428195] Memory state around the buggy address: [ 36.428814] ffff88800cc56f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 36.429693] ffff88800cc56f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.430572] >ffff88800cc57000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.431468] ^ [ 36.432215] ffff88800cc57080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 36.433115] ffff88800cc57100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.433969] ================================================================== [ 36.435088] Disabling lock debugging due to kernel taint [ 38.563109] BUG: Bad rss-counter state mm:00000000f5c42da1 type:MM_FILEPAGES val:33 [ 38.564113] BUG: Bad rss-counter state mm:00000000f5c42da1 type:MM_ANONPAGES val:22 [ 39.002257] BUG: Bad rss-counter state mm:00000000573cba92 type:MM_FILEPAGES val:33 [ 39.003238] BUG: Bad rss-counter state mm:00000000573cba92 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44575' (ECDSA) to the list of known hosts. 2023/06/20 12:49:24 fuzzer started 2023/06/20 12:49:24 dialing manager at localhost:36067 2023/06/20 12:49:25 checking machine... 2023/06/20 12:49:25 checking revisions... [ 39.759497] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:49:25 testing simple program... [ 39.805743] cgroup: Unknown subsys name 'net' [ 39.849983] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:49:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016709800 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880167099e8 RBP=ffff8880167099d0 RSP=ffff888017c8f8a0 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000293 R13=ffff888017c8fa48 R14=ffff8880167099e8 R15=0000000000000000 RIP=ffffffff812d8e7a 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 00007f09f98d7700 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=00007fec3f7f5650 CR3=0000000016a0e000 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=3a5d3932325b646873732034323a3934 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383034 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=dffffc0000000000 RBX=ffff88800e5fcfc0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800e5fcfc4 RBP=1ffff11002bcffcf RSP=ffff888015e7fe70 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800e5fcf00 R13=ffff88800e5fcfc0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff812e0072 RFL=00000213 [----A-C] 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 00007efd96228900 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=00007ffe79acc000 CR3=0000000016af2000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000