syzkaller login: [ 38.918569] BUG: Bad rss-counter state mm:00000000c5bfb3c2 type:MM_FILEPAGES val:33 [ 38.920623] BUG: Bad rss-counter state mm:00000000c5bfb3c2 type:MM_ANONPAGES val:22 [ 39.072077] ================================================================== [ 39.073021] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.073959] Read of size 8 at addr ffff888016d52880 by task sshd/218 [ 39.074751] [ 39.075135] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.076341] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.077345] Call Trace: [ 39.077693] [ 39.077988] dump_stack_lvl+0x91/0xf0 [ 39.078495] print_report+0xcc/0x620 [ 39.079017] ? __virt_addr_valid+0x102/0x340 [ 39.079630] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.080284] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.080945] kasan_report+0xbe/0xf0 [ 39.081440] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.082102] vma_interval_tree_remove+0xc75/0xec0 [ 39.082746] vma_prepare+0xc54/0x11a0 [ 39.083244] __split_vma+0x5af/0x950 [ 39.083790] ? __pfx___split_vma+0x10/0x10 [ 39.084339] ? find_held_lock+0x2c/0x110 [ 39.084895] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.085481] ? lock_is_held_type+0x9f/0x120 [ 39.086069] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.086718] ? mtree_range_walk+0x632/0x900 [ 39.087295] ? mas_walk+0x5c7/0x7c0 [ 39.087828] do_vmi_munmap+0x1f1/0x2b0 [ 39.088342] mmap_region+0x1f9/0x2660 [ 39.088851] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.089385] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.090147] ? __pfx_lock_acquire+0x10/0x10 [ 39.090717] ? __pfx_mmap_region+0x10/0x10 [ 39.091264] ? security_mmap_addr+0x7d/0xa0 [ 39.091868] ? get_unmapped_area+0x1f5/0x3f0 [ 39.092433] do_mmap+0x854/0xf00 [ 39.092910] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.093426] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.094026] ksys_mmap_pgoff+0x3af/0x500 [ 39.094564] do_syscall_64+0x3f/0x90 [ 39.095067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.095787] RIP: 0033:0x7fb88a6e0d82 [ 39.096268] 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 [ 39.098540] RSP: 002b:00007ffcee04c158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.099484] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb88a6e0d82 [ 39.100401] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb889b1a000 [ 39.101302] RBP: 00007fb889b1a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.102201] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a98215d90 [ 39.103098] R13: 00007ffcee04c170 R14: 00007ffcee04c1a0 R15: 00007ffcee04c500 [ 39.104052] [ 39.104355] [ 39.104599] Allocated by task 211: [ 39.105051] kasan_save_stack+0x22/0x50 [ 39.105584] kasan_set_track+0x25/0x30 [ 39.106097] __kasan_slab_alloc+0x59/0x70 [ 39.106662] kmem_cache_alloc+0x16b/0x370 [ 39.107207] vm_area_dup+0x20/0x160 [ 39.107720] __split_vma+0x170/0x950 [ 39.108212] split_vma+0xc6/0x110 [ 39.108714] mprotect_fixup+0x8d2/0xb30 [ 39.109241] do_mprotect_pkey+0x87e/0xd40 [ 39.109798] __x64_sys_mprotect+0x78/0xc0 [ 39.110342] do_syscall_64+0x3f/0x90 [ 39.110848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.111530] [ 39.111793] Freed by task 211: [ 39.112201] kasan_save_stack+0x22/0x50 [ 39.112744] kasan_set_track+0x25/0x30 [ 39.113256] kasan_save_free_info+0x2b/0x50 [ 39.113822] __kasan_slab_free+0x10a/0x190 [ 39.114371] kmem_cache_free+0x10d/0x4d0 [ 39.114913] rcu_core+0x8c8/0x2860 [ 39.115375] __do_softirq+0x1b7/0x7d4 [ 39.115914] [ 39.116138] Last potentially related work creation: [ 39.116825] kasan_save_stack+0x22/0x50 [ 39.117480] __kasan_record_aux_stack+0x8e/0xa0 [ 39.118095] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.118778] remove_vma+0x139/0x170 [ 39.119246] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.119879] do_vmi_munmap+0x1f1/0x2b0 [ 39.120385] __vm_munmap+0x138/0x3a0 [ 39.120882] __x64_sys_munmap+0x59/0x80 [ 39.121401] do_syscall_64+0x3f/0x90 [ 39.121906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.122589] [ 39.122815] The buggy address belongs to the object at ffff888016d52828 [ 39.122815] which belongs to the cache vm_area_struct of size 168 [ 39.124388] The buggy address is located 88 bytes inside of [ 39.124388] freed 168-byte region [ffff888016d52828, ffff888016d528d0) [ 39.125892] [ 39.126121] The buggy address belongs to the physical page: [ 39.126828] page:000000007467ce26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d52 [ 39.128034] memcg:ffff88800df61701 [ 39.128478] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.129224] page_type: 0xffffffff() [ 39.129710] raw: 0100000000000200 ffff8880087a0c80 ffffea000036d000 dead000000000005 [ 39.130685] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df61701 [ 39.131667] page dumped because: kasan: bad access detected [ 39.132356] [ 39.132596] Memory state around the buggy address: [ 39.133204] ffff888016d52780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.134122] ffff888016d52800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.135039] >ffff888016d52880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.135968] ^ [ 39.136395] ffff888016d52900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.137294] ffff888016d52980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 39.138205] ================================================================== [ 39.139368] Disabling lock debugging due to kernel taint [ 41.377562] BUG: Bad rss-counter state mm:00000000306737d5 type:MM_FILEPAGES val:33 [ 41.378665] BUG: Bad rss-counter state mm:00000000306737d5 type:MM_ANONPAGES val:22 [ 41.821557] BUG: Bad rss-counter state mm:0000000083a26be8 type:MM_FILEPAGES val:33 [ 41.822829] BUG: Bad rss-counter state mm:0000000083a26be8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13636' (ECDSA) to the list of known hosts. 2023/06/20 21:36:25 fuzzer started 2023/06/20 21:36:25 dialing manager at localhost:36067 2023/06/20 21:36:25 checking machine... 2023/06/20 21:36:25 checking revisions... [ 42.542764] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:36:25 testing simple program... [ 42.593875] cgroup: Unknown subsys name 'net' [ 42.644798] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:36:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffea0000313600 RDX=0000000000000000 RSI=ffff88800c4d9c00 RDI=ffffed100189b380 RBP=ffffffff81803033 RSP=ffff888015f37c40 R8 =0000000000000400 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800c4d9c00 R13=ffff888008441c80 R14=ffffffff81803033 R15=00000000802a0017 RIP=ffffffff8180f258 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 00007f315c266900 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=00007f315c21a01c CR3=000000000e670000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9e1329 RSP=ffff88806cf09928 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff88800ef66a10 RIP=ffffffff8135b935 RFL=00000247 [---Z-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 00007fc023ec3900 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=00007fc0232f6230 CR3=000000000c55c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=5e79aa66ca0b67cb00000000000ae988 XMM05=ff9f2e01cd8937e60000000000132fe8 XMM06=bdf2e299e47b49d50000000000131440 XMM07=fb795ef6d657705600000000001219b8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000