syzkaller login: [ 28.631971] BUG: Bad rss-counter state mm:00000000325928f2 type:MM_FILEPAGES val:33 [ 28.632918] BUG: Bad rss-counter state mm:00000000325928f2 type:MM_ANONPAGES val:22 [ 28.761263] ================================================================== [ 28.761986] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.762717] Read of size 8 at addr ffff88800edaea50 by task sshd/221 [ 28.763317] [ 28.763486] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.764232] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.764989] Call Trace: [ 28.765237] [ 28.765457] dump_stack_lvl+0x91/0xf0 [ 28.765843] print_report+0xcc/0x620 [ 28.766239] ? __virt_addr_valid+0x102/0x340 [ 28.766670] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.767150] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.767630] kasan_report+0xbe/0xf0 [ 28.768005] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.768484] vma_interval_tree_remove+0xc75/0xec0 [ 28.768945] vma_prepare+0xc54/0x11a0 [ 28.769316] __split_vma+0x5af/0x950 [ 28.769686] ? __pfx___split_vma+0x10/0x10 [ 28.770123] ? find_held_lock+0x2c/0x110 [ 28.770535] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.770978] ? lock_is_held_type+0x9f/0x120 [ 28.771391] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.771843] ? mtree_range_walk+0x632/0x900 [ 28.772256] ? mas_walk+0x5c7/0x7c0 [ 28.772609] do_vmi_munmap+0x1f1/0x2b0 [ 28.772976] mmap_region+0x1f9/0x2660 [ 28.773339] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.773733] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.774271] ? __pfx_lock_acquire+0x10/0x10 [ 28.774669] ? __pfx_mmap_region+0x10/0x10 [ 28.775062] ? security_mmap_addr+0x7d/0xa0 [ 28.775459] ? get_unmapped_area+0x1f5/0x3f0 [ 28.775868] do_mmap+0x854/0xf00 [ 28.776190] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.776561] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.776980] ksys_mmap_pgoff+0x3af/0x500 [ 28.777355] do_syscall_64+0x3f/0x90 [ 28.777728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.778214] RIP: 0033:0x7f36616d4d82 [ 28.778551] 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 [ 28.780160] RSP: 002b:00007ffe3b658d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.780834] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36616d4d82 [ 28.781471] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3660b0e000 [ 28.782121] RBP: 00007f3660b0e000 R08: 0000000000000009 R09: 0000000000001000 [ 28.782773] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600c074bec0 [ 28.783401] R13: 00007ffe3b658d60 R14: 00007ffe3b658d90 R15: 00007ffe3b6590f0 [ 28.784047] [ 28.784268] [ 28.784430] Allocated by task 214: [ 28.784748] kasan_save_stack+0x22/0x50 [ 28.785119] kasan_set_track+0x25/0x30 [ 28.785480] __kasan_slab_alloc+0x59/0x70 [ 28.785883] kmem_cache_alloc+0x16b/0x370 [ 28.786266] vm_area_dup+0x20/0x160 [ 28.786612] __split_vma+0x170/0x950 [ 28.786953] split_vma+0xc6/0x110 [ 28.787282] mprotect_fixup+0x8d2/0xb30 [ 28.787652] do_mprotect_pkey+0x87e/0xd40 [ 28.788034] __x64_sys_mprotect+0x78/0xc0 [ 28.788422] do_syscall_64+0x3f/0x90 [ 28.788775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.789259] [ 28.789421] Freed by task 214: [ 28.789724] kasan_save_stack+0x22/0x50 [ 28.790099] kasan_set_track+0x25/0x30 [ 28.790466] kasan_save_free_info+0x2b/0x50 [ 28.790863] __kasan_slab_free+0x10a/0x190 [ 28.791257] kmem_cache_free+0x10d/0x4d0 [ 28.791632] rcu_core+0x8c8/0x2860 [ 28.791966] __do_softirq+0x1b7/0x7d4 [ 28.792326] [ 28.792485] Last potentially related work creation: [ 28.792924] kasan_save_stack+0x22/0x50 [ 28.793301] __kasan_record_aux_stack+0x8e/0xa0 [ 28.793737] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.794219] remove_vma+0x139/0x170 [ 28.794552] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.794961] do_vmi_munmap+0x1f1/0x2b0 [ 28.795315] __vm_munmap+0x138/0x3a0 [ 28.795661] __x64_sys_munmap+0x59/0x80 [ 28.796036] do_syscall_64+0x3f/0x90 [ 28.796394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.796871] [ 28.797030] The buggy address belongs to the object at ffff88800edae9f8 [ 28.797030] which belongs to the cache vm_area_struct of size 168 [ 28.798150] The buggy address is located 88 bytes inside of [ 28.798150] freed 168-byte region [ffff88800edae9f8, ffff88800edaeaa0) [ 28.799194] [ 28.799355] The buggy address belongs to the physical page: [ 28.799844] page:0000000050276d7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedae [ 28.800649] memcg:ffff88800e52c201 [ 28.800963] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.801452] page_type: 0xffffffff() [ 28.801811] raw: 0100000000000200 ffff8880087a0c80 ffffea00003af580 dead000000000004 [ 28.802489] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e52c201 [ 28.803167] page dumped because: kasan: bad access detected [ 28.803656] [ 28.803818] Memory state around the buggy address: [ 28.804255] ffff88800edae900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.804888] ffff88800edae980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 28.805527] >ffff88800edaea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.806166] ^ [ 28.806680] ffff88800edaea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 28.807319] ffff88800edaeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.807944] ================================================================== [ 28.808708] Disabling lock debugging due to kernel taint [ 30.612069] BUG: Bad rss-counter state mm:00000000cbc17249 type:MM_FILEPAGES val:33 [ 30.612962] BUG: Bad rss-counter state mm:00000000cbc17249 type:MM_ANONPAGES val:22 [ 31.054660] BUG: Bad rss-counter state mm:000000005bf324dc type:MM_FILEPAGES val:33 [ 31.055351] BUG: Bad rss-counter state mm:000000005bf324dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56525' (ECDSA) to the list of known hosts. 2023/06/20 18:29:54 fuzzer started 2023/06/20 18:29:54 dialing manager at localhost:36067 2023/06/20 18:29:54 checking machine... 2023/06/20 18:29:54 checking revisions... [ 31.724609] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:29:54 testing simple program... [ 31.773889] cgroup: Unknown subsys name 'net' [ 31.825371] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:29:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000058 RCX=ffffffff844a504f RDX=ffff888014571b40 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800dc6fa08 RSP=ffff88801458fcc0 R8 =0000000000000000 R9 =000000000000000b R10=000000000000000d R11=0000000000000000 R12=000000000000000b R13=000000000000000d R14=00007fe3aba65da0 R15=00007fe3ab9effff 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 00007fe3ac605900 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=00007fe3aba65da0 CR3=000000000b3b0000 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=40800e9d3e83519500000000000ae988 XMM05=6aab1945845bba0f0000000000132e90 XMM06=c291bd5c70af25b90000000000131f30 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000bc46f2ae RBX=000000008b6279d4 RCX=ffff88800fba7984 RDX=000000000000000a RSI=000000000000000b RDI=0000000030e478da RBP=0000000000000000 RSP=ffff88800fba78f8 R8 =0000000082d9c7ae R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800fba7960 R15=000000000000000a RIP=ffffffff82270479 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 00007fc9051ab900 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=00007fc905175008 CR3=0000000019f56000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000