syzkaller login: [ 31.088224] BUG: Bad rss-counter state mm:00000000d74d2e15 type:MM_FILEPAGES val:33 [ 31.089682] BUG: Bad rss-counter state mm:00000000d74d2e15 type:MM_ANONPAGES val:22 [ 31.244476] ================================================================== [ 31.245430] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.246379] Read of size 8 at addr ffff88800e086310 by task sshd/221 [ 31.247258] [ 31.247478] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.248366] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.249385] Call Trace: [ 31.249707] <TASK> [ 31.249995] dump_stack_lvl+0x91/0xf0 [ 31.250498] print_report+0xcc/0x620 [ 31.250997] ? __virt_addr_valid+0x102/0x340 [ 31.251557] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.252203] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.252850] kasan_report+0xbe/0xf0 [ 31.253336] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.253974] vma_interval_tree_remove+0xc75/0xec0 [ 31.254595] vma_prepare+0xc54/0x11a0 [ 31.255097] __split_vma+0x5af/0x950 [ 31.255586] ? __pfx___split_vma+0x10/0x10 [ 31.256124] ? find_held_lock+0x2c/0x110 [ 31.256679] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.257245] ? lock_is_held_type+0x9f/0x120 [ 31.257797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.258419] ? mtree_range_walk+0x632/0x900 [ 31.258985] ? mas_walk+0x5c7/0x7c0 [ 31.259478] do_vmi_munmap+0x1f1/0x2b0 [ 31.259981] mmap_region+0x1f9/0x2660 [ 31.260478] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.261009] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.261735] ? __pfx_lock_acquire+0x10/0x10 [ 31.262283] ? __pfx_mmap_region+0x10/0x10 [ 31.262823] ? security_mmap_addr+0x7d/0xa0 [ 31.263368] ? get_unmapped_area+0x1f5/0x3f0 [ 31.263925] do_mmap+0x854/0xf00 [ 31.264388] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.264897] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.265479] ksys_mmap_pgoff+0x3af/0x500 [ 31.265997] do_syscall_64+0x3f/0x90 [ 31.266485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.267149] RIP: 0033:0x7fa96ef76d82 [ 31.267618] 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 [ 31.269788] RSP: 002b:00007ffcf9bb0488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.270718] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa96ef76d82 [ 31.271577] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa96e3b0000 [ 31.272444] RBP: 00007fa96e3b0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.273287] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f5b4c6f70 [ 31.274157] R13: 00007ffcf9bb04a0 R14: 00007ffcf9bb04d0 R15: 00007ffcf9bb0830 [ 31.275021] </TASK> [ 31.275325] [ 31.275546] Allocated by task 214: [ 31.275995] kasan_save_stack+0x22/0x50 [ 31.276527] kasan_set_track+0x25/0x30 [ 31.277035] __kasan_slab_alloc+0x59/0x70 [ 31.277560] kmem_cache_alloc+0x16b/0x370 [ 31.278092] vm_area_dup+0x20/0x160 [ 31.278556] __split_vma+0x170/0x950 [ 31.279023] split_vma+0xc6/0x110 [ 31.279473] mprotect_fixup+0x8d2/0xb30 [ 31.279994] do_mprotect_pkey+0x87e/0xd40 [ 31.280527] __x64_sys_mprotect+0x78/0xc0 [ 31.281063] do_syscall_64+0x3f/0x90 [ 31.281552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282197] [ 31.282412] Freed by task 214: [ 31.282808] kasan_save_stack+0x22/0x50 [ 31.283318] kasan_set_track+0x25/0x30 [ 31.283820] kasan_save_free_info+0x2b/0x50 [ 31.284384] __kasan_slab_free+0x10a/0x190 [ 31.284928] kmem_cache_free+0x10d/0x4d0 [ 31.285446] rcu_core+0x8c8/0x2860 [ 31.285904] __do_softirq+0x1b7/0x7d4 [ 31.286396] [ 31.286611] Last potentially related work creation: [ 31.287196] kasan_save_stack+0x22/0x50 [ 31.287708] __kasan_record_aux_stack+0x8e/0xa0 [ 31.288293] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.288956] remove_vma+0x139/0x170 [ 31.289420] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.289991] do_vmi_munmap+0x1f1/0x2b0 [ 31.290482] __vm_munmap+0x138/0x3a0 [ 31.290960] __x64_sys_munmap+0x59/0x80 [ 31.291465] do_syscall_64+0x3f/0x90 [ 31.291952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.292612] [ 31.292833] The buggy address belongs to the object at ffff88800e0862b8 [ 31.292833] which belongs to the cache vm_area_struct of size 168 [ 31.294307] The buggy address is located 88 bytes inside of [ 31.294307] freed 168-byte region [ffff88800e0862b8, ffff88800e086360) [ 31.295734] [ 31.295954] The buggy address belongs to the physical page: [ 31.296630] page:00000000486717bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe086 [ 31.297734] memcg:ffff8880143ae301 [ 31.298162] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.298816] page_type: 0xffffffff() [ 31.299269] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.300216] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880143ae301 [ 31.301149] page dumped because: kasan: bad access detected [ 31.301828] [ 31.302046] Memory state around the buggy address: [ 31.302635] ffff88800e086200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.303516] ffff88800e086280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.304397] >ffff88800e086300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.305259] ^ [ 31.305732] ffff88800e086380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.306599] ffff88800e086400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.307465] ================================================================== [ 31.308459] Disabling lock debugging due to kernel taint [ 33.240556] BUG: Bad rss-counter state mm:00000000095400d1 type:MM_FILEPAGES val:33 [ 33.241849] BUG: Bad rss-counter state mm:00000000095400d1 type:MM_ANONPAGES val:22 [ 33.719775] BUG: Bad rss-counter state mm:000000009775d8fd type:MM_FILEPAGES val:33 [ 33.720792] BUG: Bad rss-counter state mm:000000009775d8fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40534' (ECDSA) to the list of known hosts. 2023/06/20 17:23:13 fuzzer started 2023/06/20 17:23:13 dialing manager at localhost:36067 2023/06/20 17:23:13 checking machine... 2023/06/20 17:23:13 checking revisions... [ 34.374434] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:23:13 testing simple program... [ 34.416958] cgroup: Unknown subsys name 'net' [ 34.472809] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:23:12 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=00007f95df0bb040 CR3=0000000013634000 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=b0f5901e5592e0bf784f8edaefd1f87d XMM02=000000000011cb50eff9b2d0a8fce9cb XMM03=000000000011cc202c67c8bc2e329bc3 XMM04=56526dd5b0113b6600000000000ae988 XMM05=e4cb8bb95a7664b600000000001311c0 XMM06=580abb05d32a86420000000000130028 XMM07=e042d86d42eb936e00000000001215e0 XMM08=14d29e02a36296a3000000000011cc20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff818c8501 RCX=0000000000000001 RDX=1ffff11001fc6f30 RSI=ffff88800fe37d10 RDI=ffffffff818c8501 RBP=ffff88800fe37980 RSP=ffff88800fe378f8 R8 =0000000000000001 R9 =ffff88800fe37968 R10=0000000000038001 R11=0000000000020c5e R12=ffff88800fe379f0 R13=0000000000000000 R14=ffff88800edfd1c0 R15=0000000000000cc0 RIP=ffffffff811fc7a0 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 00007f17fa5e9900 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=00007fff54b71000 CR3=000000000ef52000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000