syzkaller login: [ 27.255330] BUG: Bad rss-counter state mm:000000003071c408 type:MM_FILEPAGES val:33 [ 27.256792] BUG: Bad rss-counter state mm:000000003071c408 type:MM_ANONPAGES val:22 [ 27.396361] ================================================================== [ 27.397253] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.398319] Read of size 8 at addr ffff888015e4bd08 by task sshd/218 [ 27.399060] [ 27.399268] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.400099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.401077] Call Trace: [ 27.401379] [ 27.401608] dump_stack_lvl+0x91/0xf0 [ 27.401987] print_report+0xcc/0x620 [ 27.402364] ? __virt_addr_valid+0x102/0x340 [ 27.402816] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.403345] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.403930] kasan_report+0xbe/0xf0 [ 27.404394] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.405010] vma_interval_tree_remove+0xc75/0xec0 [ 27.405605] vma_prepare+0xc54/0x11a0 [ 27.406068] __split_vma+0x5af/0x950 [ 27.406522] ? __pfx___split_vma+0x10/0x10 [ 27.407037] ? find_held_lock+0x2c/0x110 [ 27.407544] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.408091] ? lock_is_held_type+0x9f/0x120 [ 27.408611] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.409200] ? mtree_range_walk+0x632/0x900 [ 27.409741] ? mas_walk+0x5c7/0x7c0 [ 27.410227] do_vmi_munmap+0x1f1/0x2b0 [ 27.410703] mmap_region+0x1f9/0x2660 [ 27.411170] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.411669] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.412373] ? __pfx_lock_acquire+0x10/0x10 [ 27.412789] ? __pfx_mmap_region+0x10/0x10 [ 27.413203] ? security_mmap_addr+0x7d/0xa0 [ 27.413611] ? get_unmapped_area+0x1f5/0x3f0 [ 27.414065] do_mmap+0x854/0xf00 [ 27.414430] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.414902] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.415445] ksys_mmap_pgoff+0x3af/0x500 [ 27.415936] do_syscall_64+0x3f/0x90 [ 27.416397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.417035] RIP: 0033:0x7f39080a4d82 [ 27.417475] 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 [ 27.419494] RSP: 002b:00007ffd867c1db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.420358] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39080a4d82 [ 27.421134] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39074de000 [ 27.421786] RBP: 00007f39074de000 R08: 0000000000000009 R09: 0000000000001000 [ 27.422452] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563800ea3d90 [ 27.423174] R13: 00007ffd867c1dd0 R14: 00007ffd867c1e00 R15: 00007ffd867c2160 [ 27.423983] [ 27.424264] [ 27.424474] Allocated by task 211: [ 27.424886] kasan_save_stack+0x22/0x50 [ 27.425393] kasan_set_track+0x25/0x30 [ 27.425866] __kasan_slab_alloc+0x59/0x70 [ 27.426371] kmem_cache_alloc+0x16b/0x370 [ 27.426860] vm_area_dup+0x20/0x160 [ 27.427297] __split_vma+0x170/0x950 [ 27.427740] split_vma+0xc6/0x110 [ 27.428162] mprotect_fixup+0x8d2/0xb30 [ 27.428641] do_mprotect_pkey+0x87e/0xd40 [ 27.429147] __x64_sys_mprotect+0x78/0xc0 [ 27.429643] do_syscall_64+0x3f/0x90 [ 27.430096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.430708] [ 27.430915] Freed by task 19: [ 27.431281] kasan_save_stack+0x22/0x50 [ 27.431764] kasan_set_track+0x25/0x30 [ 27.432235] kasan_save_free_info+0x2b/0x50 [ 27.432738] __kasan_slab_free+0x10a/0x190 [ 27.433168] kmem_cache_free+0x10d/0x4d0 [ 27.433558] rcu_core+0x8c8/0x2860 [ 27.433911] __do_softirq+0x1b7/0x7d4 [ 27.434296] [ 27.434480] Last potentially related work creation: [ 27.435022] kasan_save_stack+0x22/0x50 [ 27.435507] __kasan_record_aux_stack+0x8e/0xa0 [ 27.436051] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.436661] remove_vma+0x139/0x170 [ 27.437093] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.437635] do_vmi_munmap+0x1f1/0x2b0 [ 27.438104] __vm_munmap+0x138/0x3a0 [ 27.438571] __x64_sys_munmap+0x59/0x80 [ 27.439132] do_syscall_64+0x3f/0x90 [ 27.439587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.440194] [ 27.440397] The buggy address belongs to the object at ffff888015e4bcb0 [ 27.440397] which belongs to the cache vm_area_struct of size 168 [ 27.441806] The buggy address is located 88 bytes inside of [ 27.441806] freed 168-byte region [ffff888015e4bcb0, ffff888015e4bd58) [ 27.443146] [ 27.443355] The buggy address belongs to the physical page: [ 27.443987] page:00000000c3a725dc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e4b [ 27.445043] memcg:ffff888015c46d01 [ 27.445448] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.445991] page_type: 0xffffffff() [ 27.446336] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 27.447062] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c46d01 [ 27.447838] page dumped because: kasan: bad access detected [ 27.448467] [ 27.448676] Memory state around the buggy address: [ 27.449245] ffff888015e4bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 27.450069] ffff888015e4bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 27.450900] >ffff888015e4bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 27.451713] ^ [ 27.452152] ffff888015e4bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 27.453007] ffff888015e4be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 27.453839] ================================================================== [ 27.454721] Disabling lock debugging due to kernel taint [ 29.923067] BUG: Bad rss-counter state mm:000000002f4883be type:MM_FILEPAGES val:33 [ 29.923847] BUG: Bad rss-counter state mm:000000002f4883be type:MM_ANONPAGES val:22 [ 30.400438] BUG: Bad rss-counter state mm:00000000eb1208c6 type:MM_FILEPAGES val:33 [ 30.402032] BUG: Bad rss-counter state mm:00000000eb1208c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3118' (ECDSA) to the list of known hosts. 2023/06/19 16:28:31 fuzzer started 2023/06/19 16:28:31 dialing manager at localhost:44161 2023/06/19 16:28:31 checking machine... 2023/06/19 16:28:31 checking revisions... [ 31.029175] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:28:31 testing simple program... [ 31.068084] cgroup: Unknown subsys name 'net' [ 31.101561] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:28:27 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888010043680 RSI=ffffffff81970e65 RDI=0000000000000006 RBP=0000000000000504 RSP=ffff88800e5b7588 R8 =0000000000000006 R9 =0000000000001000 R10=0000000000001000 R11=00000000000b6996 R12=ffff8880161a1740 R13=0000000000000000 R14=ffff8880161a1740 R15=0000000000000504 RIP=ffffffff814c0800 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbbe37cd700 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=00007f3f680d9ff0 CR3=000000000f600000 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=2031333a38323a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a38323a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856529e0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007f4e7dc23477 RSP=ffff88806cf099f8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007f4e7dc23477 R13=0000000000000000 R14=ffff888015eb8000 R15=ffff88801a28ff18 RIP=ffffffff814c8416 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 00007f4e7d730900 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=00007fff80d6a000 CR3=000000000dcbe000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000