syzkaller login: [ 30.028541] BUG: Bad rss-counter state mm:00000000383f7a2f type:MM_FILEPAGES val:33 [ 30.029543] BUG: Bad rss-counter state mm:00000000383f7a2f type:MM_ANONPAGES val:22 [ 30.198714] ================================================================== [ 30.199618] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.200559] Read of size 8 at addr ffff88800e122d08 by task sshd/219 [ 30.201435] [ 30.201658] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.202537] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.203541] Call Trace: [ 30.203868] [ 30.204149] dump_stack_lvl+0x91/0xf0 [ 30.204643] print_report+0xcc/0x620 [ 30.205129] ? __virt_addr_valid+0x102/0x340 [ 30.205673] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.206312] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.206925] kasan_report+0xbe/0xf0 [ 30.207401] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.208022] vma_interval_tree_remove+0xc75/0xec0 [ 30.208621] vma_prepare+0xc54/0x11a0 [ 30.209106] __split_vma+0x5af/0x950 [ 30.209575] ? __pfx___split_vma+0x10/0x10 [ 30.210111] ? find_held_lock+0x2c/0x110 [ 30.210635] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.211198] ? lock_is_held_type+0x9f/0x120 [ 30.211734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.212337] ? mtree_range_walk+0x632/0x900 [ 30.212888] ? mas_walk+0x5c7/0x7c0 [ 30.213364] do_vmi_munmap+0x1f1/0x2b0 [ 30.213857] mmap_region+0x1f9/0x2660 [ 30.214341] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.214853] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.215555] ? __pfx_lock_acquire+0x10/0x10 [ 30.216087] ? __pfx_mmap_region+0x10/0x10 [ 30.216625] ? security_mmap_addr+0x7d/0xa0 [ 30.217158] ? get_unmapped_area+0x1f5/0x3f0 [ 30.217703] do_mmap+0x854/0xf00 [ 30.218161] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.218659] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.219226] ksys_mmap_pgoff+0x3af/0x500 [ 30.219729] do_syscall_64+0x3f/0x90 [ 30.220212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.220856] RIP: 0033:0x7f91ed396d82 [ 30.221315] 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 [ 30.223479] RSP: 002b:00007ffc301e4058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.224402] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91ed396d82 [ 30.225260] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91ec7d0000 [ 30.226106] RBP: 00007f91ec7d0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.226959] R10: 0000000000000812 R11: 0000000000000206 R12: 000055720c1c9b20 [ 30.227809] R13: 00007ffc301e4070 R14: 00007ffc301e40a0 R15: 00007ffc301e4400 [ 30.228664] [ 30.228957] [ 30.229171] Allocated by task 212: [ 30.229598] kasan_save_stack+0x22/0x50 [ 30.230121] kasan_set_track+0x25/0x30 [ 30.230616] __kasan_slab_alloc+0x59/0x70 [ 30.231142] kmem_cache_alloc+0x16b/0x370 [ 30.231658] vm_area_dup+0x20/0x160 [ 30.232112] __split_vma+0x170/0x950 [ 30.232581] split_vma+0xc6/0x110 [ 30.233030] mprotect_fixup+0x8d2/0xb30 [ 30.233546] do_mprotect_pkey+0x87e/0xd40 [ 30.234081] __x64_sys_mprotect+0x78/0xc0 [ 30.234620] do_syscall_64+0x3f/0x90 [ 30.235103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.235756] [ 30.235972] Freed by task 209: [ 30.236364] kasan_save_stack+0x22/0x50 [ 30.236868] kasan_set_track+0x25/0x30 [ 30.237363] kasan_save_free_info+0x2b/0x50 [ 30.237915] __kasan_slab_free+0x10a/0x190 [ 30.238448] kmem_cache_free+0x10d/0x4d0 [ 30.238954] rcu_core+0x8c8/0x2860 [ 30.239401] __do_softirq+0x1b7/0x7d4 [ 30.239885] [ 30.240099] Last potentially related work creation: [ 30.240688] kasan_save_stack+0x22/0x50 [ 30.241200] __kasan_record_aux_stack+0x8e/0xa0 [ 30.241783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.242429] remove_vma+0x139/0x170 [ 30.242877] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.243448] do_vmi_munmap+0x1f1/0x2b0 [ 30.243935] __vm_munmap+0x138/0x3a0 [ 30.244403] __x64_sys_munmap+0x59/0x80 [ 30.244908] do_syscall_64+0x3f/0x90 [ 30.245382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.246041] [ 30.246255] The buggy address belongs to the object at ffff88800e122cb0 [ 30.246255] which belongs to the cache vm_area_struct of size 168 [ 30.247718] The buggy address is located 88 bytes inside of [ 30.247718] freed 168-byte region [ffff88800e122cb0, ffff88800e122d58) [ 30.249143] [ 30.249360] The buggy address belongs to the physical page: [ 30.250036] page:00000000ac8c2e5d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe122 [ 30.251126] memcg:ffff88801ab72e01 [ 30.251568] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.252220] page_type: 0xffffffff() [ 30.252677] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.253605] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801ab72e01 [ 30.254531] page dumped because: kasan: bad access detected [ 30.255207] [ 30.255426] Memory state around the buggy address: [ 30.256013] ffff88800e122c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.256889] ffff88800e122c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.257783] >ffff88800e122d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.258635] ^ [ 30.259073] ffff88800e122d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.259935] ffff88800e122e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.260801] ================================================================== [ 30.261803] Disabling lock debugging due to kernel taint [ 32.136933] BUG: Bad rss-counter state mm:000000000208fdb3 type:MM_FILEPAGES val:33 [ 32.138127] BUG: Bad rss-counter state mm:000000000208fdb3 type:MM_ANONPAGES val:22 [ 32.605071] BUG: Bad rss-counter state mm:00000000608f8cef type:MM_FILEPAGES val:33 [ 32.606109] BUG: Bad rss-counter state mm:00000000608f8cef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14217' (ECDSA) to the list of known hosts. 2023/06/20 14:24:41 fuzzer started 2023/06/20 14:24:42 dialing manager at localhost:36067 2023/06/20 14:24:42 checking machine... 2023/06/20 14:24:42 checking revisions... [ 33.302390] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:24:42 testing simple program... [ 33.351260] cgroup: Unknown subsys name 'net' [ 33.387311] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:24:41 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fa0cea70000 CR3=000000000f670000 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=00000000000000000000000000000000 XMM01=adb3ac1a2944b19cd246413ae2de400d XMM02=2c67c8bc2e329bc3000000000011d588 XMM03=fb795ef6d65770560000000000121c50 XMM04=37e123b49042bd3700000000000ae988 XMM05=dfcdbad4f1609c370000000000131aa8 XMM06=14383fae5ff04d280000000000130910 XMM07=e042d86d42eb936e0000000000121ed0 XMM08=941353e41211a2e2000000000011d5e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c96405 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff864b202e RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff864b2030 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88800e13ff58 R15=ffff88806cf09a50 RIP=ffffffff811311c7 RFL=00000217 [----APC] 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 00007f454fbfc900 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=00007ffd686d7000 CR3=000000000f112000 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=6720646572637465733a4d41503d706f 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