syzkaller login: [ 30.571313] BUG: Bad rss-counter state mm:000000000a9319c4 type:MM_FILEPAGES val:33 [ 30.572550] BUG: Bad rss-counter state mm:000000000a9319c4 type:MM_ANONPAGES val:22 [ 30.737918] ================================================================== [ 30.739007] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.740235] Read of size 8 at addr ffff88800e0c0968 by task sshd/221 [ 30.741135] [ 30.741374] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.742349] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.743428] Call Trace: [ 30.743780] [ 30.744097] dump_stack_lvl+0x91/0xf0 [ 30.744640] print_report+0xcc/0x620 [ 30.745188] ? __virt_addr_valid+0x102/0x340 [ 30.745812] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746493] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.747176] kasan_report+0xbe/0xf0 [ 30.747719] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.748410] vma_interval_tree_remove+0xc75/0xec0 [ 30.749108] vma_prepare+0xc54/0x11a0 [ 30.749647] __split_vma+0x5af/0x950 [ 30.750176] ? __pfx___split_vma+0x10/0x10 [ 30.750764] ? find_held_lock+0x2c/0x110 [ 30.751308] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.751871] ? lock_is_held_type+0x9f/0x120 [ 30.752413] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.753025] ? mtree_range_walk+0x632/0x900 [ 30.753575] ? mas_walk+0x5c7/0x7c0 [ 30.754047] do_vmi_munmap+0x1f1/0x2b0 [ 30.754544] mmap_region+0x1f9/0x2660 [ 30.755033] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.755544] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.756256] ? __pfx_lock_acquire+0x10/0x10 [ 30.756808] ? __pfx_mmap_region+0x10/0x10 [ 30.757339] ? security_mmap_addr+0x7d/0xa0 [ 30.757864] ? get_unmapped_area+0x1f5/0x3f0 [ 30.758412] do_mmap+0x854/0xf00 [ 30.758848] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.759338] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.759899] ksys_mmap_pgoff+0x3af/0x500 [ 30.760401] do_syscall_64+0x3f/0x90 [ 30.760891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.761608] RIP: 0033:0x7fbcd1bd8d82 [ 30.762117] 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 [ 30.764529] RSP: 002b:00007ffc605a9a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.765596] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbcd1bd8d82 [ 30.766565] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbcd1012000 [ 30.767545] RBP: 00007fbcd1012000 R08: 0000000000000009 R09: 0000000000001000 [ 30.768528] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563fcd72cd90 [ 30.769481] R13: 00007ffc605a9a50 R14: 00007ffc605a9a80 R15: 00007ffc605a9de0 [ 30.770401] [ 30.770716] [ 30.770944] Allocated by task 214: [ 30.771404] kasan_save_stack+0x22/0x50 [ 30.771945] kasan_set_track+0x25/0x30 [ 30.772475] __kasan_slab_alloc+0x59/0x70 [ 30.773071] kmem_cache_alloc+0x16b/0x370 [ 30.773633] vm_area_dup+0x20/0x160 [ 30.774131] __split_vma+0x170/0x950 [ 30.774644] split_vma+0xc6/0x110 [ 30.775120] mprotect_fixup+0x8d2/0xb30 [ 30.775670] do_mprotect_pkey+0x87e/0xd40 [ 30.776233] __x64_sys_mprotect+0x78/0xc0 [ 30.776819] do_syscall_64+0x3f/0x90 [ 30.777343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.778057] [ 30.778296] Freed by task 214: [ 30.778726] kasan_save_stack+0x22/0x50 [ 30.779287] kasan_set_track+0x25/0x30 [ 30.779831] kasan_save_free_info+0x2b/0x50 [ 30.780415] __kasan_slab_free+0x10a/0x190 [ 30.781009] kmem_cache_free+0x10d/0x4d0 [ 30.781566] rcu_core+0x8c8/0x2860 [ 30.782045] __do_softirq+0x1b7/0x7d4 [ 30.782575] [ 30.782811] Last potentially related work creation: [ 30.783453] kasan_save_stack+0x22/0x50 [ 30.784001] __kasan_record_aux_stack+0x8e/0xa0 [ 30.784626] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.785357] remove_vma+0x139/0x170 [ 30.785850] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.786461] do_vmi_munmap+0x1f1/0x2b0 [ 30.786995] __vm_munmap+0x138/0x3a0 [ 30.787506] __x64_sys_munmap+0x59/0x80 [ 30.788055] do_syscall_64+0x3f/0x90 [ 30.788578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.789290] [ 30.789522] The buggy address belongs to the object at ffff88800e0c0910 [ 30.789522] which belongs to the cache vm_area_struct of size 168 [ 30.791102] The buggy address is located 88 bytes inside of [ 30.791102] freed 168-byte region [ffff88800e0c0910, ffff88800e0c09b8) [ 30.792586] [ 30.792837] The buggy address belongs to the physical page: [ 30.793539] page:00000000108057ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0c0 [ 30.794696] memcg:ffff88800d927801 [ 30.795159] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.795860] page_type: 0xffffffff() [ 30.796371] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.797393] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d927801 [ 30.798460] page dumped because: kasan: bad access detected [ 30.799199] [ 30.799426] Memory state around the buggy address: [ 30.800070] ffff88800e0c0800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.801014] ffff88800e0c0880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.801945] >ffff88800e0c0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.802873] ^ [ 30.803725] ffff88800e0c0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.804675] ffff88800e0c0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.805631] ================================================================== [ 30.806875] Disabling lock debugging due to kernel taint [ 32.914684] BUG: Bad rss-counter state mm:00000000727f6832 type:MM_FILEPAGES val:33 [ 32.915664] BUG: Bad rss-counter state mm:00000000727f6832 type:MM_ANONPAGES val:22 [ 33.364370] BUG: Bad rss-counter state mm:0000000098a85618 type:MM_FILEPAGES val:33 [ 33.365455] BUG: Bad rss-counter state mm:0000000098a85618 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11542' (ECDSA) to the list of known hosts. 2023/06/20 19:31:46 fuzzer started 2023/06/20 19:31:47 dialing manager at localhost:36067 2023/06/20 19:31:47 checking machine... 2023/06/20 19:31:47 checking revisions... [ 34.070545] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:31:47 testing simple program... [ 34.115935] cgroup: Unknown subsys name 'net' [ 34.153789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:31:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000255 RCX=ffffffff8171ada4 RDX=ffff888006ac8000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888006977488 RSP=ffff8880069dfe70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=0000000000000000 R12=0000000000000001 R13=00007fda20ee4ac0 R14=ffff888006977498 R15=0000000000000040 RIP=ffffffff814c027c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fda21ad1900 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=00007fda20ee4ac0 CR3=00000000145b2000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f149fdad52ecd9b500000000000ae988 XMM05=79b8bd464ce1318300000000001329e8 XMM06=c291bd5c70af25b90000000000131a88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888013c03ca0 RBX=ffff888013c06658 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888013c06690 RBP=ffff888013c03c60 RSP=ffff888014587c98 R8 =0000000000000001 R9 =ffffed10028b0f87 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88801936c468 R14=ffffffff818c73ee R15=ffff88800e0d9080 RIP=ffffffff81846513 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 00007efeb7d8f900 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=00007ffd5702d000 CR3=000000000f0d2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000