syzkaller login: [ 31.119954] BUG: Bad rss-counter state mm:00000000b80e7326 type:MM_FILEPAGES val:33 [ 31.120983] BUG: Bad rss-counter state mm:00000000b80e7326 type:MM_ANONPAGES val:22 [ 31.286957] ================================================================== [ 31.288063] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.289349] Read of size 8 at addr ffff88800f327798 by task sshd/222 [ 31.290258] [ 31.290502] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.291372] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.292348] Call Trace: [ 31.292668] [ 31.292957] dump_stack_lvl+0x91/0xf0 [ 31.293458] print_report+0xcc/0x620 [ 31.293949] ? __virt_addr_valid+0x102/0x340 [ 31.294505] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.295125] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.295755] kasan_report+0xbe/0xf0 [ 31.296231] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.296856] vma_interval_tree_remove+0xc75/0xec0 [ 31.297467] vma_prepare+0xc54/0x11a0 [ 31.297946] __split_vma+0x5af/0x950 [ 31.298416] ? __pfx___split_vma+0x10/0x10 [ 31.298942] ? find_held_lock+0x2c/0x110 [ 31.299461] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.300029] ? lock_is_held_type+0x9f/0x120 [ 31.300562] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.301167] ? mtree_range_walk+0x632/0x900 [ 31.301747] ? mas_walk+0x5c7/0x7c0 [ 31.302226] do_vmi_munmap+0x1f1/0x2b0 [ 31.302721] mmap_region+0x1f9/0x2660 [ 31.303206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.303722] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.304435] ? __pfx_lock_acquire+0x10/0x10 [ 31.304970] ? __pfx_mmap_region+0x10/0x10 [ 31.305514] ? security_mmap_addr+0x7d/0xa0 [ 31.306044] ? get_unmapped_area+0x1f5/0x3f0 [ 31.306597] do_mmap+0x854/0xf00 [ 31.307039] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.307533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.308097] ksys_mmap_pgoff+0x3af/0x500 [ 31.308603] do_syscall_64+0x3f/0x90 [ 31.309086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.309735] RIP: 0033:0x7f0c1e1d5d82 [ 31.310198] 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 [ 31.312333] RSP: 002b:00007ffdba3252d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.313252] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c1e1d5d82 [ 31.314124] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c1d60f000 [ 31.314963] RBP: 00007f0c1d60f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.315809] R10: 0000000000000812 R11: 0000000000000206 R12: 00005589faf63ec0 [ 31.316664] R13: 00007ffdba3252f0 R14: 00007ffdba325320 R15: 00007ffdba325680 [ 31.317549] [ 31.317840] [ 31.318058] Allocated by task 215: [ 31.318491] kasan_save_stack+0x22/0x50 [ 31.318997] kasan_set_track+0x25/0x30 [ 31.319502] __kasan_slab_alloc+0x59/0x70 [ 31.320027] kmem_cache_alloc+0x16b/0x370 [ 31.320539] vm_area_dup+0x20/0x160 [ 31.321005] __split_vma+0x170/0x950 [ 31.321486] split_vma+0xc6/0x110 [ 31.321926] mprotect_fixup+0x8d2/0xb30 [ 31.322427] do_mprotect_pkey+0x87e/0xd40 [ 31.322956] __x64_sys_mprotect+0x78/0xc0 [ 31.323491] do_syscall_64+0x3f/0x90 [ 31.323969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.324633] [ 31.324847] Freed by task 215: [ 31.325241] kasan_save_stack+0x22/0x50 [ 31.325767] kasan_set_track+0x25/0x30 [ 31.326268] kasan_save_free_info+0x2b/0x50 [ 31.326795] __kasan_slab_free+0x10a/0x190 [ 31.327329] kmem_cache_free+0x10d/0x4d0 [ 31.327831] rcu_core+0x8c8/0x2860 [ 31.328276] __do_softirq+0x1b7/0x7d4 [ 31.328754] [ 31.328973] Last potentially related work creation: [ 31.329571] kasan_save_stack+0x22/0x50 [ 31.330069] __kasan_record_aux_stack+0x8e/0xa0 [ 31.330707] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.331351] remove_vma+0x139/0x170 [ 31.331800] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.332361] do_vmi_munmap+0x1f1/0x2b0 [ 31.332857] __vm_munmap+0x138/0x3a0 [ 31.333340] __x64_sys_munmap+0x59/0x80 [ 31.333844] do_syscall_64+0x3f/0x90 [ 31.334321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.334972] [ 31.335188] The buggy address belongs to the object at ffff88800f327740 [ 31.335188] which belongs to the cache vm_area_struct of size 168 [ 31.336655] The buggy address is located 88 bytes inside of [ 31.336655] freed 168-byte region [ffff88800f327740, ffff88800f3277e8) [ 31.338066] [ 31.338281] The buggy address belongs to the physical page: [ 31.338937] page:00000000311807df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf327 [ 31.340016] memcg:ffff888016a70001 [ 31.340446] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.341090] page_type: 0xffffffff() [ 31.341549] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.342470] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a70001 [ 31.343378] page dumped because: kasan: bad access detected [ 31.344038] [ 31.344254] Memory state around the buggy address: [ 31.344834] ffff88800f327680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.345726] ffff88800f327700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.346578] >ffff88800f327780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.347433] ^ [ 31.347929] ffff88800f327800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.348784] ffff88800f327880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.349644] ================================================================== [ 31.350576] Disabling lock debugging due to kernel taint [ 33.351646] BUG: Bad rss-counter state mm:000000009a7cbd9c type:MM_FILEPAGES val:33 [ 33.352698] BUG: Bad rss-counter state mm:000000009a7cbd9c type:MM_ANONPAGES val:22 [ 33.821266] BUG: Bad rss-counter state mm:00000000cd7798d9 type:MM_FILEPAGES val:33 [ 33.822351] BUG: Bad rss-counter state mm:00000000cd7798d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21628' (ECDSA) to the list of known hosts. 2023/06/21 02:00:58 fuzzer started 2023/06/21 02:00:58 dialing manager at localhost:36067 2023/06/21 02:00:58 checking machine... 2023/06/21 02:00:58 checking revisions... [ 34.561274] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:00:58 testing simple program... [ 34.613071] cgroup: Unknown subsys name 'net' [ 34.652973] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:00:58 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=00007ffde1052ce8 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=00007f8b26d4a510000055a0598ec790 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=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=00007ff73b7900d0 CR3=000000001962e000 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=2037353a30303a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a30303a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000