syzkaller login: [ 30.665683] BUG: Bad rss-counter state mm:000000005072eb05 type:MM_FILEPAGES val:33 [ 30.667340] BUG: Bad rss-counter state mm:000000005072eb05 type:MM_ANONPAGES val:22 [ 30.826653] ================================================================== [ 30.827780] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.829160] Read of size 8 at addr ffff88800db2ad08 by task sshd/220 [ 30.829969] [ 30.830188] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.831087] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.832075] Call Trace: [ 30.832392] [ 30.832686] dump_stack_lvl+0x91/0xf0 [ 30.833181] print_report+0xcc/0x620 [ 30.833669] ? __virt_addr_valid+0x102/0x340 [ 30.834259] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.834898] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.835518] kasan_report+0xbe/0xf0 [ 30.836011] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836639] vma_interval_tree_remove+0xc75/0xec0 [ 30.837259] vma_prepare+0xc54/0x11a0 [ 30.837753] __split_vma+0x5af/0x950 [ 30.838258] ? __pfx___split_vma+0x10/0x10 [ 30.838791] ? find_held_lock+0x2c/0x110 [ 30.839310] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.839897] ? lock_is_held_type+0x9f/0x120 [ 30.840438] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.841081] ? mtree_range_walk+0x632/0x900 [ 30.841641] ? mas_walk+0x5c7/0x7c0 [ 30.842151] do_vmi_munmap+0x1f1/0x2b0 [ 30.842654] mmap_region+0x1f9/0x2660 [ 30.843163] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.843683] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.844411] ? __pfx_lock_acquire+0x10/0x10 [ 30.844985] ? __pfx_mmap_region+0x10/0x10 [ 30.845513] ? security_mmap_addr+0x7d/0xa0 [ 30.846087] ? get_unmapped_area+0x1f5/0x3f0 [ 30.846627] do_mmap+0x854/0xf00 [ 30.847090] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.847594] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.848174] ksys_mmap_pgoff+0x3af/0x500 [ 30.848696] do_syscall_64+0x3f/0x90 [ 30.849194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849872] RIP: 0033:0x7f442877ad82 [ 30.850327] 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 [ 30.852448] RSP: 002b:00007ffcd60178d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.853394] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f442877ad82 [ 30.854285] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4427bb4000 [ 30.855141] RBP: 00007f4427bb4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.855998] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9d0f6eec0 [ 30.856865] R13: 00007ffcd60178f0 R14: 00007ffcd6017920 R15: 00007ffcd6017c80 [ 30.857707] [ 30.858035] [ 30.858249] Allocated by task 213: [ 30.858674] kasan_save_stack+0x22/0x50 [ 30.859187] kasan_set_track+0x25/0x30 [ 30.859677] __kasan_slab_alloc+0x59/0x70 [ 30.860229] kmem_cache_alloc+0x16b/0x370 [ 30.860767] vm_area_dup+0x20/0x160 [ 30.861228] __split_vma+0x170/0x950 [ 30.861690] split_vma+0xc6/0x110 [ 30.862164] mprotect_fixup+0x8d2/0xb30 [ 30.862667] do_mprotect_pkey+0x87e/0xd40 [ 30.863206] __x64_sys_mprotect+0x78/0xc0 [ 30.863719] do_syscall_64+0x3f/0x90 [ 30.864206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.864883] [ 30.865099] Freed by task 19: [ 30.865474] kasan_save_stack+0x22/0x50 [ 30.866016] kasan_set_track+0x25/0x30 [ 30.866506] kasan_save_free_info+0x2b/0x50 [ 30.867049] __kasan_slab_free+0x10a/0x190 [ 30.867571] kmem_cache_free+0x10d/0x4d0 [ 30.868091] rcu_core+0x8c8/0x2860 [ 30.868539] __do_softirq+0x1b7/0x7d4 [ 30.869035] [ 30.869247] Last potentially related work creation: [ 30.869863] kasan_save_stack+0x22/0x50 [ 30.870443] __kasan_record_aux_stack+0x8e/0xa0 [ 30.871037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.871668] remove_vma+0x139/0x170 [ 30.872136] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.872713] do_vmi_munmap+0x1f1/0x2b0 [ 30.873207] __vm_munmap+0x138/0x3a0 [ 30.873671] __x64_sys_munmap+0x59/0x80 [ 30.874201] do_syscall_64+0x3f/0x90 [ 30.874682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.875333] [ 30.875544] The buggy address belongs to the object at ffff88800db2acb0 [ 30.875544] which belongs to the cache vm_area_struct of size 168 [ 30.877043] The buggy address is located 88 bytes inside of [ 30.877043] freed 168-byte region [ffff88800db2acb0, ffff88800db2ad58) [ 30.878465] [ 30.878679] The buggy address belongs to the physical page: [ 30.879347] page:00000000774caf26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb2a [ 30.880447] memcg:ffff88801678d201 [ 30.880918] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.881564] page_type: 0xffffffff() [ 30.882048] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.882973] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801678d201 [ 30.883894] page dumped because: kasan: bad access detected [ 30.884556] [ 30.884786] Memory state around the buggy address: [ 30.885369] ffff88800db2ac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.886255] ffff88800db2ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.887115] >ffff88800db2ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.887977] ^ [ 30.888409] ffff88800db2ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.889289] ffff88800db2ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.890181] ================================================================== [ 30.891120] Disabling lock debugging due to kernel taint [ 32.979001] BUG: Bad rss-counter state mm:0000000026c3da79 type:MM_FILEPAGES val:33 [ 32.980157] BUG: Bad rss-counter state mm:0000000026c3da79 type:MM_ANONPAGES val:22 [ 33.431930] BUG: Bad rss-counter state mm:00000000a3c74c0f type:MM_FILEPAGES val:33 [ 33.433152] BUG: Bad rss-counter state mm:00000000a3c74c0f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18276' (ECDSA) to the list of known hosts. 2023/06/21 01:27:19 fuzzer started 2023/06/21 01:27:19 dialing manager at localhost:36067 2023/06/21 01:27:19 checking machine... 2023/06/21 01:27:19 checking revisions... [ 34.112913] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:27:19 testing simple program... [ 34.162367] cgroup: Unknown subsys name 'net' [ 34.223594] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:27:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016821000 RCX=0000000000000000 RDX=ffff88800f219b40 RSI=ffffffff83699fb5 RDI=ffffffff84535d53 RBP=ffff8880168211d0 RSP=ffff888016acf740 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000293 R13=ffff888016acf8a0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff815343ab RFL=00000006 [-----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 00007f82dcff8900 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=00007f82dd5af618 CR3=000000001ca18000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fcb3b4b7120 CR3=000000000d8ca000 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=74e31651cfb3f8a0f74c84a6e1a03ca9 XMM02=2c67c8bc2e329bc30000000000119e90 XMM03=fb795ef6d65770560000000000121330 XMM04=633c24edf21f342c00000000000ae988 XMM05=1eff068fdb540faa0000000000131f38 XMM06=4fda316b135da52b0000000000130fd8 XMM07=e042d86d42eb936e00000000001215b0 XMM08=767e177d3a7a5c210000000000119ef0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000