syzkaller login: [ 31.604830] BUG: Bad rss-counter state mm:000000003898d42f type:MM_FILEPAGES val:33 [ 31.605864] BUG: Bad rss-counter state mm:000000003898d42f type:MM_ANONPAGES val:22 [ 31.779372] ================================================================== [ 31.780606] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.782052] Read of size 8 at addr ffff888017347d08 by task sshd/219 [ 31.783083] [ 31.783375] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.784547] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.785885] Call Trace: [ 31.786222] [ 31.786523] dump_stack_lvl+0x91/0xf0 [ 31.787021] print_report+0xcc/0x620 [ 31.787529] ? __virt_addr_valid+0x102/0x340 [ 31.788083] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.788701] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.789339] kasan_report+0xbe/0xf0 [ 31.789814] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.790444] vma_interval_tree_remove+0xc75/0xec0 [ 31.791051] vma_prepare+0xc54/0x11a0 [ 31.791537] __split_vma+0x5af/0x950 [ 31.792004] ? __pfx___split_vma+0x10/0x10 [ 31.792530] ? find_held_lock+0x2c/0x110 [ 31.793049] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.793618] ? lock_is_held_type+0x9f/0x120 [ 31.794150] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.794745] ? mtree_range_walk+0x632/0x900 [ 31.795293] ? mas_walk+0x5c7/0x7c0 [ 31.795767] do_vmi_munmap+0x1f1/0x2b0 [ 31.796256] mmap_region+0x1f9/0x2660 [ 31.796736] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.797263] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.797983] ? __pfx_lock_acquire+0x10/0x10 [ 31.798518] ? __pfx_mmap_region+0x10/0x10 [ 31.799043] ? security_mmap_addr+0x7d/0xa0 [ 31.799572] ? get_unmapped_area+0x1f5/0x3f0 [ 31.800121] do_mmap+0x854/0xf00 [ 31.800553] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.801047] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.801610] ksys_mmap_pgoff+0x3af/0x500 [ 31.802113] do_syscall_64+0x3f/0x90 [ 31.802594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.803277] RIP: 0033:0x7eff1b5d5d82 [ 31.803797] 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 [ 31.806230] RSP: 002b:00007ffe0af9e6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.807266] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff1b5d5d82 [ 31.808225] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff1aa0f000 [ 31.809190] RBP: 00007eff1aa0f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.810152] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621c94f4f60 [ 31.811116] R13: 00007ffe0af9e6f0 R14: 00007ffe0af9e720 R15: 00007ffe0af9ea80 [ 31.812089] [ 31.812421] [ 31.812667] Allocated by task 212: [ 31.813166] kasan_save_stack+0x22/0x50 [ 31.813748] kasan_set_track+0x25/0x30 [ 31.814311] __kasan_slab_alloc+0x59/0x70 [ 31.814907] kmem_cache_alloc+0x16b/0x370 [ 31.815495] vm_area_dup+0x20/0x160 [ 31.816009] __split_vma+0x170/0x950 [ 31.816533] split_vma+0xc6/0x110 [ 31.817028] mprotect_fixup+0x8d2/0xb30 [ 31.817608] do_mprotect_pkey+0x87e/0xd40 [ 31.818194] __x64_sys_mprotect+0x78/0xc0 [ 31.818777] do_syscall_64+0x3f/0x90 [ 31.819321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.820044] [ 31.820286] Freed by task 212: [ 31.820729] kasan_save_stack+0x22/0x50 [ 31.821308] kasan_set_track+0x25/0x30 [ 31.821866] kasan_save_free_info+0x2b/0x50 [ 31.822469] __kasan_slab_free+0x10a/0x190 [ 31.823152] kmem_cache_free+0x10d/0x4d0 [ 31.823733] rcu_core+0x8c8/0x2860 [ 31.824235] __do_softirq+0x1b7/0x7d4 [ 31.824777] [ 31.825022] Last potentially related work creation: [ 31.825703] kasan_save_stack+0x22/0x50 [ 31.826274] __kasan_record_aux_stack+0x8e/0xa0 [ 31.826926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.827651] remove_vma+0x139/0x170 [ 31.828158] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.828786] do_vmi_munmap+0x1f1/0x2b0 [ 31.829336] __vm_munmap+0x138/0x3a0 [ 31.829855] __x64_sys_munmap+0x59/0x80 [ 31.830419] do_syscall_64+0x3f/0x90 [ 31.830965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.831707] [ 31.831955] The buggy address belongs to the object at ffff888017347cb0 [ 31.831955] which belongs to the cache vm_area_struct of size 168 [ 31.833661] The buggy address is located 88 bytes inside of [ 31.833661] freed 168-byte region [ffff888017347cb0, ffff888017347d58) [ 31.835273] [ 31.835526] The buggy address belongs to the physical page: [ 31.836279] page:0000000099a6deb2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17347 [ 31.837547] memcg:ffff88801a2b6801 [ 31.838042] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.838786] page_type: 0xffffffff() [ 31.839305] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.840346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2b6801 [ 31.841375] page dumped because: kasan: bad access detected [ 31.842129] [ 31.842372] Memory state around the buggy address: [ 31.843032] ffff888017347c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.844020] ffff888017347c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.844996] >ffff888017347d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.845979] ^ [ 31.846485] ffff888017347d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.847462] ffff888017347e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.848434] ================================================================== [ 31.849502] Disabling lock debugging due to kernel taint [ 33.676591] BUG: Bad rss-counter state mm:00000000b0b08d41 type:MM_FILEPAGES val:33 [ 33.677405] BUG: Bad rss-counter state mm:00000000b0b08d41 type:MM_ANONPAGES val:22 [ 34.145816] BUG: Bad rss-counter state mm:00000000a7987734 type:MM_FILEPAGES val:33 [ 34.146599] BUG: Bad rss-counter state mm:00000000a7987734 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38956' (ECDSA) to the list of known hosts. 2023/06/20 16:29:44 fuzzer started 2023/06/20 16:29:44 dialing manager at localhost:36067 2023/06/20 16:29:44 checking machine... 2023/06/20 16:29:44 checking revisions... [ 34.827301] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:29:45 testing simple program... [ 34.865896] cgroup: Unknown subsys name 'net' [ 34.928187] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:29:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c3fe008 RCX=ffffffff81f73fa0 RDX=ffff88800dc351c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888016fa7c20 RSP=ffff888016fa7a08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000001 R13=ffff888016fa7c30 R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff814c0864 RFL=00000202 [-------] 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 00007f4c43495900 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=00007f4c43a4c618 CR3=0000000016934000 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=2034343a39323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a39323a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002dba0d1 RBX=ffff888016dd0658 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888016dd0688 RBP=ffff888018c38468 RSP=ffff888008e37cb8 R8 =0000000000000001 R9 =ffffed10011c6f8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888018c38468 R14=ffffffff813782f8 R15=ffff88800daac800 RIP=ffffffff818464ec 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 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=00007f52c58cc740 CR3=000000000d700000 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=d7fb276490d9b59eb542baca4b89c10a XMM02=000000000011c3d0ec2efd57dc4c00df XMM03=00000000001230d89b687a62b13f7ad9 XMM04=04b3cf270c43f5dc00000000000ae988 XMM05=19e9129bd510f2350000000000132f98 XMM06=4fda316b135da52b0000000000132e20 XMM07=e042d86d42eb936e0000000000123358 XMM08=9b687a62b13f7ad9000000000011c430 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000