syzkaller login: [ 30.191644] BUG: Bad rss-counter state mm:00000000f854d113 type:MM_FILEPAGES val:33 [ 30.192659] BUG: Bad rss-counter state mm:00000000f854d113 type:MM_ANONPAGES val:22 [ 30.233475] ================================================================== [ 30.234511] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.235515] Read of size 8 at addr ffff8880101c93f8 by task sshd/221 [ 30.236570] [ 30.236786] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.237803] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.238960] Call Trace: [ 30.239363] <TASK> [ 30.239730] dump_stack_lvl+0x91/0xf0 [ 30.240220] print_report+0xcc/0x620 [ 30.240715] ? __virt_addr_valid+0x102/0x340 [ 30.241268] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.241936] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.242572] kasan_report+0xbe/0xf0 [ 30.243053] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.243683] vma_interval_tree_remove+0xc75/0xec0 [ 30.244288] vma_prepare+0xc54/0x11a0 [ 30.244781] __split_vma+0x5af/0x950 [ 30.245371] ? __pfx___split_vma+0x10/0x10 [ 30.245944] ? find_held_lock+0x2c/0x110 [ 30.246485] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.247063] ? lock_is_held_type+0x9f/0x120 [ 30.247641] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.248256] ? mtree_range_walk+0x632/0x900 [ 30.248838] ? mas_walk+0x5c7/0x7c0 [ 30.249312] do_vmi_munmap+0x1f1/0x2b0 [ 30.249845] mmap_region+0x1f9/0x2660 [ 30.250335] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.250854] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.251581] ? __pfx_lock_acquire+0x10/0x10 [ 30.252111] ? __pfx_mmap_region+0x10/0x10 [ 30.252657] ? security_mmap_addr+0x7d/0xa0 [ 30.253200] ? get_unmapped_area+0x1f5/0x3f0 [ 30.253797] do_mmap+0x854/0xf00 [ 30.254240] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.254746] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.255308] ksys_mmap_pgoff+0x3af/0x500 [ 30.255846] do_syscall_64+0x3f/0x90 [ 30.256327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.256988] RIP: 0033:0x7f58f017dd82 [ 30.257468] 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 [ 30.259622] RSP: 002b:00007ffe7be38c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.260537] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f58f017dd82 [ 30.261383] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f58ef5b7000 [ 30.262254] RBP: 00007f58ef5b7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.263119] R10: 0000000000000812 R11: 0000000000000206 R12: 000055abf7363ec0 [ 30.263993] R13: 00007ffe7be38c50 R14: 00007ffe7be38c80 R15: 00007ffe7be38fe0 [ 30.264862] </TASK> [ 30.265162] [ 30.265380] Allocated by task 214: [ 30.265843] kasan_save_stack+0x22/0x50 [ 30.266348] kasan_set_track+0x25/0x30 [ 30.266875] __kasan_slab_alloc+0x59/0x70 [ 30.267408] kmem_cache_alloc+0x16b/0x370 [ 30.267945] vm_area_dup+0x20/0x160 [ 30.268415] __split_vma+0x170/0x950 [ 30.268903] split_vma+0xc6/0x110 [ 30.269350] mprotect_fixup+0x8d2/0xb30 [ 30.269888] do_mprotect_pkey+0x87e/0xd40 [ 30.270426] __x64_sys_mprotect+0x78/0xc0 [ 30.270953] do_syscall_64+0x3f/0x90 [ 30.271459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.272106] [ 30.272326] Freed by task 214: [ 30.272740] kasan_save_stack+0x22/0x50 [ 30.273245] kasan_set_track+0x25/0x30 [ 30.273782] kasan_save_free_info+0x2b/0x50 [ 30.274308] __kasan_slab_free+0x10a/0x190 [ 30.274858] kmem_cache_free+0x10d/0x4d0 [ 30.275367] rcu_core+0x8c8/0x2860 [ 30.275839] __do_softirq+0x1b7/0x7d4 [ 30.276316] [ 30.276551] Last potentially related work creation: [ 30.277140] kasan_save_stack+0x22/0x50 [ 30.277675] __kasan_record_aux_stack+0x8e/0xa0 [ 30.278249] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.278912] remove_vma+0x139/0x170 [ 30.279364] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.279954] do_vmi_munmap+0x1f1/0x2b0 [ 30.280458] __vm_munmap+0x138/0x3a0 [ 30.280933] __x64_sys_munmap+0x59/0x80 [ 30.281453] do_syscall_64+0x3f/0x90 [ 30.281939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.282600] [ 30.282822] The buggy address belongs to the object at ffff8880101c93a0 [ 30.282822] which belongs to the cache vm_area_struct of size 168 [ 30.284328] The buggy address is located 88 bytes inside of [ 30.284328] freed 168-byte region [ffff8880101c93a0, ffff8880101c9448) [ 30.285780] [ 30.285999] The buggy address belongs to the physical page: [ 30.286676] page:00000000ccce952f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101c9 [ 30.287800] memcg:ffff88800dd2f001 [ 30.288227] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.288891] page_type: 0xffffffff() [ 30.289338] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.290312] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd2f001 [ 30.291236] page dumped because: kasan: bad access detected [ 30.291932] [ 30.292147] Memory state around the buggy address: [ 30.292755] ffff8880101c9280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.293657] ffff8880101c9300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.294545] >ffff8880101c9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.295434] ^ [ 30.296529] ffff8880101c9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.297688] ffff8880101c9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.298822] ================================================================== [ 30.300156] Disabling lock debugging due to kernel taint [ 32.269815] BUG: Bad rss-counter state mm:00000000328fce21 type:MM_FILEPAGES val:33 [ 32.270830] BUG: Bad rss-counter state mm:00000000328fce21 type:MM_ANONPAGES val:22 [ 32.762825] BUG: Bad rss-counter state mm:00000000cbda4d9b type:MM_FILEPAGES val:33 [ 32.764020] BUG: Bad rss-counter state mm:00000000cbda4d9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45172' (ECDSA) to the list of known hosts. 2023/06/21 07:19:41 fuzzer started 2023/06/21 07:19:41 dialing manager at localhost:36067 2023/06/21 07:19:41 checking machine... 2023/06/21 07:19:41 checking revisions... [ 33.485007] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:19:41 testing simple program... [ 33.531143] cgroup: Unknown subsys name 'net' [ 33.576302] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:19:40 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=0000000000000001 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=000055d8a9110290 CR3=0000000005482000 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=00007faa03e26510000055cb5748a790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffbd1e962 RBX=ffffffff85e2d1a4 RCX=ffffffff81b4bb00 RDX=0000000000000000 RSI=ffffffff8617f8cc RDI=ffffffff85e2d19c RBP=ffffffff85e2d19c RSP=ffff888016f4f3d8 R8 =ffffffff8617f8cc R9 =ffff888016f4f4d0 R10=0000000000038001 R11=000000000002c9f6 R12=ffffffff85e2d1b0 R13=ffffffff85e2d19c R14=ffffffff85e2d19c R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f0254808700 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=00007f84a47ab430 CR3=0000000016a76000 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=2030343a39313a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a39313a3730203132 XMM08=00007f024002ddf00000005c00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000