syzkaller login: [ 30.579358] BUG: Bad rss-counter state mm:000000007298f241 type:MM_FILEPAGES val:33 [ 30.581036] BUG: Bad rss-counter state mm:000000007298f241 type:MM_ANONPAGES val:22 [ 30.739135] ================================================================== [ 30.740070] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.741014] Read of size 8 at addr ffff88800e124228 by task sshd/219 [ 30.741784] [ 30.741998] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.742967] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.743946] Call Trace: [ 30.744276] [ 30.744560] dump_stack_lvl+0x91/0xf0 [ 30.745076] print_report+0xcc/0x620 [ 30.745563] ? __virt_addr_valid+0x102/0x340 [ 30.746123] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.746745] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.747360] kasan_report+0xbe/0xf0 [ 30.747834] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.748482] vma_interval_tree_remove+0xc75/0xec0 [ 30.749080] vma_prepare+0xc54/0x11a0 [ 30.749564] __split_vma+0x5af/0x950 [ 30.750037] ? __pfx___split_vma+0x10/0x10 [ 30.750566] ? find_held_lock+0x2c/0x110 [ 30.751087] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.751659] ? lock_is_held_type+0x9f/0x120 [ 30.752203] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.752819] ? mtree_range_walk+0x632/0x900 [ 30.753373] ? mas_walk+0x5c7/0x7c0 [ 30.753846] do_vmi_munmap+0x1f1/0x2b0 [ 30.754354] mmap_region+0x1f9/0x2660 [ 30.754838] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.755349] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.756076] ? __pfx_lock_acquire+0x10/0x10 [ 30.756618] ? __pfx_mmap_region+0x10/0x10 [ 30.757149] ? security_mmap_addr+0x7d/0xa0 [ 30.757691] ? get_unmapped_area+0x1f5/0x3f0 [ 30.758242] do_mmap+0x854/0xf00 [ 30.758687] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.759181] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.759748] ksys_mmap_pgoff+0x3af/0x500 [ 30.760280] do_syscall_64+0x3f/0x90 [ 30.760760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.761411] RIP: 0033:0x7fb40c5ccd82 [ 30.761869] 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 [ 30.764015] RSP: 002b:00007fff9251d498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.764933] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb40c5ccd82 [ 30.765779] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb40ba06000 [ 30.766653] RBP: 00007fb40ba06000 R08: 0000000000000009 R09: 0000000000001000 [ 30.767504] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c29cf58ec0 [ 30.768380] R13: 00007fff9251d4b0 R14: 00007fff9251d4e0 R15: 00007fff9251d840 [ 30.769242] [ 30.769534] [ 30.769749] Allocated by task 212: [ 30.770182] kasan_save_stack+0x22/0x50 [ 30.770692] kasan_set_track+0x25/0x30 [ 30.771181] __kasan_slab_alloc+0x59/0x70 [ 30.771700] kmem_cache_alloc+0x16b/0x370 [ 30.772224] vm_area_dup+0x20/0x160 [ 30.772679] __split_vma+0x170/0x950 [ 30.773152] split_vma+0xc6/0x110 [ 30.773593] mprotect_fixup+0x8d2/0xb30 [ 30.774103] do_mprotect_pkey+0x87e/0xd40 [ 30.774631] __x64_sys_mprotect+0x78/0xc0 [ 30.775158] do_syscall_64+0x3f/0x90 [ 30.775630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.776277] [ 30.776492] Freed by task 212: [ 30.776881] kasan_save_stack+0x22/0x50 [ 30.777380] kasan_set_track+0x25/0x30 [ 30.777878] kasan_save_free_info+0x2b/0x50 [ 30.778411] __kasan_slab_free+0x10a/0x190 [ 30.778946] kmem_cache_free+0x10d/0x4d0 [ 30.779467] rcu_core+0x8c8/0x2860 [ 30.779907] __do_softirq+0x1b7/0x7d4 [ 30.780403] [ 30.780618] Last potentially related work creation: [ 30.781198] kasan_save_stack+0x22/0x50 [ 30.781709] __kasan_record_aux_stack+0x8e/0xa0 [ 30.782290] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.782936] remove_vma+0x139/0x170 [ 30.783394] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.783948] do_vmi_munmap+0x1f1/0x2b0 [ 30.784449] __vm_munmap+0x138/0x3a0 [ 30.784917] __x64_sys_munmap+0x59/0x80 [ 30.785422] do_syscall_64+0x3f/0x90 [ 30.785902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786551] [ 30.786769] The buggy address belongs to the object at ffff88800e1241d0 [ 30.786769] which belongs to the cache vm_area_struct of size 168 [ 30.788270] The buggy address is located 88 bytes inside of [ 30.788270] freed 168-byte region [ffff88800e1241d0, ffff88800e124278) [ 30.789672] [ 30.789894] The buggy address belongs to the physical page: [ 30.790561] page:00000000f25cbf98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe124 [ 30.791652] memcg:ffff888010167301 [ 30.792085] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.792784] page_type: 0xffffffff() [ 30.793235] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bbb40 dead000000000007 [ 30.794147] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010167301 [ 30.795060] page dumped because: kasan: bad access detected [ 30.795733] [ 30.795948] Memory state around the buggy address: [ 30.796546] ffff88800e124100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.797395] ffff88800e124180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.798252] >ffff88800e124200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.799106] ^ [ 30.799665] ffff88800e124280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.800524] ffff88800e124300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.801376] ================================================================== [ 30.802368] Disabling lock debugging due to kernel taint [ 32.979411] BUG: Bad rss-counter state mm:00000000d5dc7ee9 type:MM_FILEPAGES val:33 [ 32.980466] BUG: Bad rss-counter state mm:00000000d5dc7ee9 type:MM_ANONPAGES val:22 [ 33.463325] BUG: Bad rss-counter state mm:00000000abb06163 type:MM_FILEPAGES val:33 [ 33.464463] BUG: Bad rss-counter state mm:00000000abb06163 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57971' (ECDSA) to the list of known hosts. 2023/06/21 04:19:31 fuzzer started 2023/06/21 04:19:31 dialing manager at localhost:36067 2023/06/21 04:19:31 checking machine... 2023/06/21 04:19:31 checking revisions... [ 34.163430] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:19:31 testing simple program... [ 34.275214] cgroup: Unknown subsys name 'net' [ 34.335369] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:19:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016f49b40 RCX=0000000000000000 RDX=1ffff11002bd31c2 RSI=ffffffff814e62ed RDI=ffff888015e98e10 RBP=ffff888015e98940 RSP=ffff888016a3fcf0 R8 =0000000000000007 R9 =00000000000f423f R10=00000000000f4240 R11=00000016e679689c R12=00000000000f4240 R13=000000000fe66cf2 R14=ffff888016a3ff58 R15=dffffc0000000000 RIP=ffffffff814e6310 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fed969aa900 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=00007fed96f5f650 CR3=000000000eb2a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c04400 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=00007fafeef676c0 CR3=000000000d2e8000 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=92d857f2cf8efdbdfd4dca727aae1cc2 XMM02=2c67c8bc2e329bc3000000000011b6b0 XMM03=fb795ef6d65770560000000000122050 XMM04=04035dd561a4282300000000000ae988 XMM05=1c07b74b1834921f0000000000132db8 XMM06=806171799158d9670000000000131ae8 XMM07=e042d86d42eb936e0000000000122328 XMM08=0bd6c96de7baff5e000000000011b710 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000