syzkaller login: [ 31.187295] BUG: Bad rss-counter state mm:000000000c52caba type:MM_FILEPAGES val:33 [ 31.188614] BUG: Bad rss-counter state mm:000000000c52caba type:MM_ANONPAGES val:22 [ 31.224995] ================================================================== [ 31.225972] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.226940] Read of size 8 at addr ffff88801ab94b38 by task sshd/219 [ 31.227717] [ 31.227936] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.228800] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.229782] Call Trace: [ 31.230124] [ 31.230414] dump_stack_lvl+0x91/0xf0 [ 31.230903] print_report+0xcc/0x620 [ 31.231390] ? __virt_addr_valid+0x102/0x340 [ 31.231949] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.232560] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.233185] kasan_report+0xbe/0xf0 [ 31.233667] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.234325] vma_interval_tree_remove+0xc75/0xec0 [ 31.234936] vma_prepare+0xc54/0x11a0 [ 31.235429] __split_vma+0x5af/0x950 [ 31.235917] ? __pfx___split_vma+0x10/0x10 [ 31.236568] ? find_held_lock+0x2c/0x110 [ 31.237085] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.237660] ? lock_is_held_type+0x9f/0x120 [ 31.238219] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.238846] ? mtree_range_walk+0x632/0x900 [ 31.239400] ? mas_walk+0x5c7/0x7c0 [ 31.239887] do_vmi_munmap+0x1f1/0x2b0 [ 31.240382] mmap_region+0x1f9/0x2660 [ 31.240871] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.241391] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.242118] ? __pfx_lock_acquire+0x10/0x10 [ 31.242663] ? __pfx_mmap_region+0x10/0x10 [ 31.243199] ? security_mmap_addr+0x7d/0xa0 [ 31.243729] ? get_unmapped_area+0x1f5/0x3f0 [ 31.244277] do_mmap+0x854/0xf00 [ 31.244717] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.245214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.245794] ksys_mmap_pgoff+0x3af/0x500 [ 31.246313] do_syscall_64+0x3f/0x90 [ 31.246800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.247460] RIP: 0033:0x7f69ff3ead82 [ 31.247938] 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 [ 31.250230] RSP: 002b:00007ffc952cd538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.251188] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f69ff3ead82 [ 31.252087] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69fe824000 [ 31.252982] RBP: 00007f69fe824000 R08: 0000000000000009 R09: 0000000000001000 [ 31.253889] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f7be88ec0 [ 31.254787] R13: 00007ffc952cd550 R14: 00007ffc952cd580 R15: 00007ffc952cd8e0 [ 31.255705] [ 31.256008] [ 31.256234] Allocated by task 212: [ 31.256687] kasan_save_stack+0x22/0x50 [ 31.257217] kasan_set_track+0x25/0x30 [ 31.257737] __kasan_slab_alloc+0x59/0x70 [ 31.258314] kmem_cache_alloc+0x16b/0x370 [ 31.258861] vm_area_dup+0x20/0x160 [ 31.259344] __split_vma+0x170/0x950 [ 31.259836] split_vma+0xc6/0x110 [ 31.260308] mprotect_fixup+0x8d2/0xb30 [ 31.260843] do_mprotect_pkey+0x87e/0xd40 [ 31.261390] __x64_sys_mprotect+0x78/0xc0 [ 31.261951] do_syscall_64+0x3f/0x90 [ 31.262456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.263142] [ 31.263370] Freed by task 19: [ 31.263781] kasan_save_stack+0x22/0x50 [ 31.264313] kasan_set_track+0x25/0x30 [ 31.264841] kasan_save_free_info+0x2b/0x50 [ 31.265402] __kasan_slab_free+0x10a/0x190 [ 31.265973] kmem_cache_free+0x10d/0x4d0 [ 31.266510] rcu_core+0x8c8/0x2860 [ 31.266972] __do_softirq+0x1b7/0x7d4 [ 31.267480] [ 31.267710] Last potentially related work creation: [ 31.268326] kasan_save_stack+0x22/0x50 [ 31.268867] __kasan_record_aux_stack+0x8e/0xa0 [ 31.269483] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.270183] remove_vma+0x139/0x170 [ 31.270657] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.271243] do_vmi_munmap+0x1f1/0x2b0 [ 31.271753] __vm_munmap+0x138/0x3a0 [ 31.272240] __x64_sys_munmap+0x59/0x80 [ 31.272757] do_syscall_64+0x3f/0x90 [ 31.273258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.273933] [ 31.274161] The buggy address belongs to the object at ffff88801ab94ae0 [ 31.274161] which belongs to the cache vm_area_struct of size 168 [ 31.275722] The buggy address is located 88 bytes inside of [ 31.275722] freed 168-byte region [ffff88801ab94ae0, ffff88801ab94b88) [ 31.277220] [ 31.277446] The buggy address belongs to the physical page: [ 31.278168] page:000000008a6bf3b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ab94 [ 31.279343] memcg:ffff888018fa9201 [ 31.279794] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.280472] page_type: 0xffffffff() [ 31.280943] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.281926] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fa9201 [ 31.282904] page dumped because: kasan: bad access detected [ 31.283606] [ 31.283836] Memory state around the buggy address: [ 31.284450] ffff88801ab94a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.285353] ffff88801ab94a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.286279] >ffff88801ab94b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.287189] ^ [ 31.287834] ffff88801ab94b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.288747] ffff88801ab94c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.289651] ================================================================== [ 31.290785] Disabling lock debugging due to kernel taint [ 33.543782] BUG: Bad rss-counter state mm:00000000af7eee48 type:MM_FILEPAGES val:33 [ 33.544956] BUG: Bad rss-counter state mm:00000000af7eee48 type:MM_ANONPAGES val:22 [ 33.937851] BUG: Bad rss-counter state mm:00000000591c9830 type:MM_FILEPAGES val:33 [ 33.938858] BUG: Bad rss-counter state mm:00000000591c9830 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8703' (ECDSA) to the list of known hosts. 2023/06/20 16:50:49 fuzzer started 2023/06/20 16:50:50 dialing manager at localhost:36067 2023/06/20 16:50:50 checking machine... 2023/06/20 16:50:50 checking revisions... [ 34.697213] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:50:50 testing simple program... [ 34.747352] cgroup: Unknown subsys name 'net' [ 34.814177] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:50:49 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800f0c7a28 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=dffffc0000000000 RIP=ffffffff814c0250 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 00007f4a896ca900 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=00007ffd85643000 CR3=000000000eca8000 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=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 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=00007f9507a58080 CR3=0000000019c38000 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=2039343a30353a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a30353a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000