syzkaller login: [ 61.259466] BUG: Bad rss-counter state mm:000000007b43cb63 type:MM_FILEPAGES val:33 [ 61.260916] BUG: Bad rss-counter state mm:000000007b43cb63 type:MM_ANONPAGES val:22 [ 61.421247] ================================================================== [ 61.422167] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.423097] Read of size 8 at addr ffff8880102cc140 by task sshd/226 [ 61.423883] [ 61.424243] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.425118] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.426101] Call Trace: [ 61.426428] [ 61.426724] dump_stack_lvl+0x91/0xf0 [ 61.427218] print_report+0xcc/0x620 [ 61.427712] ? __virt_addr_valid+0x102/0x340 [ 61.428264] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.428896] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.429511] kasan_report+0xbe/0xf0 [ 61.430002] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.430631] vma_interval_tree_remove+0xc75/0xec0 [ 61.431232] vma_prepare+0xc54/0x11a0 [ 61.431738] __split_vma+0x5af/0x950 [ 61.432216] ? __pfx___split_vma+0x10/0x10 [ 61.432751] ? find_held_lock+0x2c/0x110 [ 61.433271] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.433833] ? lock_is_held_type+0x9f/0x120 [ 61.434387] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.434986] ? mtree_range_walk+0x632/0x900 [ 61.435555] ? mas_walk+0x5c7/0x7c0 [ 61.436034] do_vmi_munmap+0x1f1/0x2b0 [ 61.436539] mmap_region+0x1f9/0x2660 [ 61.437018] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.437531] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.438240] ? __pfx_lock_acquire+0x10/0x10 [ 61.438772] ? __pfx_mmap_region+0x10/0x10 [ 61.439430] ? security_mmap_addr+0x7d/0xa0 [ 61.440136] ? get_unmapped_area+0x1f5/0x3f0 [ 61.440816] do_mmap+0x854/0xf00 [ 61.441361] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.441968] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.442662] ksys_mmap_pgoff+0x3af/0x500 [ 61.443325] do_syscall_64+0x3f/0x90 [ 61.443911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.444707] RIP: 0033:0x7fb58c7b9d82 [ 61.445277] 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 [ 61.447978] RSP: 002b:00007fff99178128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.449101] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb58c7b9d82 [ 61.450182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb58bbf3000 [ 61.451262] RBP: 00007fb58bbf3000 R08: 0000000000000009 R09: 0000000000001000 [ 61.452344] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614ef9c6980 [ 61.453421] R13: 00007fff99178140 R14: 00007fff99178170 R15: 00007fff991784d0 [ 61.454509] [ 61.454880] [ 61.455152] Allocated by task 219: [ 61.455722] kasan_save_stack+0x22/0x50 [ 61.456316] kasan_set_track+0x25/0x30 [ 61.456862] __kasan_slab_alloc+0x59/0x70 [ 61.457413] kmem_cache_alloc+0x16b/0x370 [ 61.457961] vm_area_dup+0x20/0x160 [ 61.458439] __split_vma+0x170/0x950 [ 61.458923] split_vma+0xc6/0x110 [ 61.459388] mprotect_fixup+0x8d2/0xb30 [ 61.459926] do_mprotect_pkey+0x87e/0xd40 [ 61.460477] __x64_sys_mprotect+0x78/0xc0 [ 61.461001] do_syscall_64+0x3f/0x90 [ 61.461485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.462141] [ 61.462355] Freed by task 19: [ 61.462738] kasan_save_stack+0x22/0x50 [ 61.463250] kasan_set_track+0x25/0x30 [ 61.463750] kasan_save_free_info+0x2b/0x50 [ 61.464285] __kasan_slab_free+0x10a/0x190 [ 61.464820] kmem_cache_free+0x10d/0x4d0 [ 61.465322] rcu_core+0x8c8/0x2860 [ 61.465816] __do_softirq+0x1b7/0x7d4 [ 61.466299] [ 61.466513] Last potentially related work creation: [ 61.467108] kasan_save_stack+0x22/0x50 [ 61.467636] __kasan_record_aux_stack+0x8e/0xa0 [ 61.468222] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.468875] remove_vma+0x139/0x170 [ 61.469374] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.469930] do_vmi_munmap+0x1f1/0x2b0 [ 61.470418] __vm_munmap+0x138/0x3a0 [ 61.470884] __x64_sys_munmap+0x59/0x80 [ 61.471391] do_syscall_64+0x3f/0x90 [ 61.471874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.472525] [ 61.472750] The buggy address belongs to the object at ffff8880102cc0e8 [ 61.472750] which belongs to the cache vm_area_struct of size 168 [ 61.474229] The buggy address is located 88 bytes inside of [ 61.474229] freed 168-byte region [ffff8880102cc0e8, ffff8880102cc190) [ 61.475668] [ 61.475888] The buggy address belongs to the physical page: [ 61.476561] page:000000001b173e86 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102cc [ 61.477674] memcg:ffff88800c5b5d01 [ 61.478115] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.478766] page_type: 0xffffffff() [ 61.479214] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.480186] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5b5d01 [ 61.481148] page dumped because: kasan: bad access detected [ 61.481820] [ 61.482046] Memory state around the buggy address: [ 61.482636] ffff8880102cc000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.483508] ffff8880102cc080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 61.484368] >ffff8880102cc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.485245] ^ [ 61.485899] ffff8880102cc180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 61.486755] ffff8880102cc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 61.487627] ================================================================== [ 61.488610] Disabling lock debugging due to kernel taint [ 63.555175] BUG: Bad rss-counter state mm:00000000a13a37db type:MM_FILEPAGES val:33 [ 63.556361] BUG: Bad rss-counter state mm:00000000a13a37db type:MM_ANONPAGES val:22 [ 64.100260] BUG: Bad rss-counter state mm:00000000415d6fba type:MM_FILEPAGES val:33 [ 64.101255] BUG: Bad rss-counter state mm:00000000415d6fba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54677' (ECDSA) to the list of known hosts. 2023/06/21 05:57:54 fuzzer started 2023/06/21 05:57:54 dialing manager at localhost:36067 2023/06/21 05:57:54 checking machine... 2023/06/21 05:57:54 checking revisions... [ 64.745464] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:57:54 testing simple program... [ 64.798661] cgroup: Unknown subsys name 'net' [ 64.863889] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:57:54 Registers: info registers vcpu 0 RAX=ffffed1001f72e85 RBX=1ffff11001f72e85 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88800fb97418 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000017 R11=000015b3000015b3 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ecd RFL=00000282 [--S----] 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 00007f3c9b743900 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=00007f3c9bcfa618 CR3=000000000cb18000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007feff989adf0 CR3=000000001418c000 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=37353a3530203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3533325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303932 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000