syzkaller login: [ 31.533871] BUG: Bad rss-counter state mm:0000000060c91d40 type:MM_FILEPAGES val:33 [ 31.534626] BUG: Bad rss-counter state mm:0000000060c91d40 type:MM_ANONPAGES val:22 [ 31.721476] ================================================================== [ 31.722047] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.722682] Read of size 8 at addr ffff88800de92d08 by task sshd/222 [ 31.723180] [ 31.723326] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.725593] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.726222] Call Trace: [ 31.726455] [ 31.726646] dump_stack_lvl+0x91/0xf0 [ 31.726966] print_report+0xcc/0x620 [ 31.727278] ? __virt_addr_valid+0x102/0x340 [ 31.727636] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.728059] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.728639] kasan_report+0xbe/0xf0 [ 31.728949] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.729358] vma_interval_tree_remove+0xc75/0xec0 [ 31.729769] vma_prepare+0xc54/0x11a0 [ 31.730076] __split_vma+0x5af/0x950 [ 31.730381] ? __pfx___split_vma+0x10/0x10 [ 31.730720] ? find_held_lock+0x2c/0x110 [ 31.731055] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.731418] ? lock_is_held_type+0x9f/0x120 [ 31.731809] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.732341] ? mtree_range_walk+0x632/0x900 [ 31.732728] ? mas_walk+0x5c7/0x7c0 [ 31.733034] do_vmi_munmap+0x1f1/0x2b0 [ 31.733347] mmap_region+0x1f9/0x2660 [ 31.733653] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.733979] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.734431] ? __pfx_lock_acquire+0x10/0x10 [ 31.734782] ? __pfx_mmap_region+0x10/0x10 [ 31.735122] ? security_mmap_addr+0x7d/0xa0 [ 31.735584] ? get_unmapped_area+0x1f5/0x3f0 [ 31.735935] do_mmap+0x854/0xf00 [ 31.736313] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.736674] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.737034] ksys_mmap_pgoff+0x3af/0x500 [ 31.737357] do_syscall_64+0x3f/0x90 [ 31.737671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.738089] RIP: 0033:0x7fcd5043dd82 [ 31.738384] 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 [ 31.739803] RSP: 002b:00007ffc7fb13d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.740414] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd5043dd82 [ 31.741043] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd4f877000 [ 31.741607] RBP: 00007fcd4f877000 R08: 0000000000000009 R09: 0000000000001000 [ 31.742140] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a5e5171ec0 [ 31.742676] R13: 00007ffc7fb13d40 R14: 00007ffc7fb13d70 R15: 00007ffc7fb140d0 [ 31.743220] [ 31.743496] [ 31.743636] Allocated by task 213: [ 31.743908] kasan_save_stack+0x22/0x50 [ 31.744292] kasan_set_track+0x25/0x30 [ 31.744653] __kasan_slab_alloc+0x59/0x70 [ 31.744992] kmem_cache_alloc+0x16b/0x370 [ 31.745322] vm_area_dup+0x20/0x160 [ 31.745633] __split_vma+0x170/0x950 [ 31.745930] split_vma+0xc6/0x110 [ 31.746211] mprotect_fixup+0x8d2/0xb30 [ 31.746532] do_mprotect_pkey+0x87e/0xd40 [ 31.746863] __x64_sys_mprotect+0x78/0xc0 [ 31.747194] do_syscall_64+0x3f/0x90 [ 31.747625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.748057] [ 31.748222] Freed by task 213: [ 31.748553] kasan_save_stack+0x22/0x50 [ 31.748877] kasan_set_track+0x25/0x30 [ 31.749192] kasan_save_free_info+0x2b/0x50 [ 31.749536] __kasan_slab_free+0x10a/0x190 [ 31.749876] kmem_cache_free+0x10d/0x4d0 [ 31.750202] rcu_core+0x8c8/0x2860 [ 31.750500] __do_softirq+0x1b7/0x7d4 [ 31.750844] [ 31.750984] Last potentially related work creation: [ 31.751467] kasan_save_stack+0x22/0x50 [ 31.751803] __kasan_record_aux_stack+0x8e/0xa0 [ 31.752235] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.752720] remove_vma+0x139/0x170 [ 31.753010] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.753363] do_vmi_munmap+0x1f1/0x2b0 [ 31.753683] __vm_munmap+0x138/0x3a0 [ 31.753985] __x64_sys_munmap+0x59/0x80 [ 31.754305] do_syscall_64+0x3f/0x90 [ 31.754636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.755047] [ 31.755185] Second to last potentially related work creation: [ 31.755705] kasan_save_stack+0x22/0x50 [ 31.756075] __kasan_record_aux_stack+0x8e/0xa0 [ 31.756508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.756925] remove_vma+0x139/0x170 [ 31.757215] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.757648] do_vmi_munmap+0x1f1/0x2b0 [ 31.757960] mmap_region+0x1f9/0x2660 [ 31.758265] do_mmap+0x854/0xf00 [ 31.758589] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.758902] ksys_mmap_pgoff+0x3af/0x500 [ 31.759222] do_syscall_64+0x3f/0x90 [ 31.759602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.760114] [ 31.760327] The buggy address belongs to the object at ffff88800de92cb0 [ 31.760327] which belongs to the cache vm_area_struct of size 168 [ 31.761678] The buggy address is located 88 bytes inside of [ 31.761678] freed 168-byte region [ffff88800de92cb0, ffff88800de92d58) [ 31.762999] [ 31.763139] The buggy address belongs to the physical page: [ 31.764768] page:00000000282de927 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde92 [ 31.766335] memcg:ffff8880096b3901 [ 31.766856] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.767270] page_type: 0xffffffff() [ 31.768617] raw: 0100000000000200 ffff8880087a0c80 ffffea000039b340 dead000000000004 [ 31.769200] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096b3901 [ 31.770996] page dumped because: kasan: bad access detected [ 31.772470] [ 31.772642] Memory state around the buggy address: [ 31.773027] ffff88800de92c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.774886] ffff88800de92c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.776388] >ffff88800de92d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.776966] ^ [ 31.777248] ffff88800de92d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.778126] ffff88800de92e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.780844] ================================================================== [ 31.800231] Disabling lock debugging due to kernel taint [ 36.607276] BUG: Bad rss-counter state mm:00000000360be85a type:MM_FILEPAGES val:33 [ 36.608030] BUG: Bad rss-counter state mm:00000000360be85a type:MM_ANONPAGES val:22 [ 37.416948] BUG: Bad rss-counter state mm:00000000cdceb0fb type:MM_FILEPAGES val:33 [ 37.418379] BUG: Bad rss-counter state mm:00000000cdceb0fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16878' (ECDSA) to the list of known hosts. 2023/06/21 10:02:29 fuzzer started 2023/06/21 10:02:29 dialing manager at localhost:36067 2023/06/21 10:02:29 checking machine... 2023/06/21 10:02:29 checking revisions... [ 38.192473] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:02:29 testing simple program... [ 38.229639] cgroup: Unknown subsys name 'net' [ 38.283212] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:02:29 Registers: info registers vcpu 0 RAX=ffffffff8608a55b RBX=0000000000000001 RCX=ffffffff8608a556 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888014747510 RSP=ffff8880147473f8 R8 =ffffffff8608a55a R9 =ffff8880147474f8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888014747518 R13=ffff888014747500 R14=ffff8880147474f9 R15=ffff8880147474b8 RIP=ffffffff81130abf 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 0000000000000000 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=00007f05696bff50 CR3=0000000010220000 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=0000000000000340fffffffe7ffbfeff XMM01=00000000000000000000000000000000 XMM02=00000000000000020000000000000000 XMM03=00000000000000008000000000000006 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000050 RBX=0000000000000050 RCX=0000000000000000 RDX=00000000000101f3 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800f2e81a0 RSP=ffff88800ba977a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f3 R11=0000000000000000 R12=00000000000101f3 R13=ffff88800f2e8050 R14=ffff88800f2e8048 R15=ffff88800f2e8060 RIP=ffffffff82191d9e RFL=00000093 [--S-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 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=000055c6e1513980 CR3=000000000d0d2000 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=00000001ffffffff0000559edcc6d240 XMM02=ffffff0f0e0d0c0b0a09080706050403 XMM03=696e656420737365636341002f737973 XMM04=4c414954494e495f4345535500313636 XMM05=6765723a6d726f6674616c703d534149 XMM06=006d726f6674616c703d4d4554535953 XMM07=2f6d726f6674616c702f736563697665 XMM08=3a56000a73253a51000a73253a47000a XMM09=00000000000000000000000000000000 XMM10=00000000200000000000000020000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000