syzkaller login: [ 29.692108] BUG: Bad rss-counter state mm:000000006416fa1d type:MM_FILEPAGES val:33 [ 29.694224] BUG: Bad rss-counter state mm:000000006416fa1d type:MM_ANONPAGES val:22 [ 29.846422] ================================================================== [ 29.847512] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.848631] Read of size 8 at addr ffff88800df54228 by task sshd/219 [ 29.849705] [ 29.849921] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.850779] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.851778] Call Trace: [ 29.852094] [ 29.852374] dump_stack_lvl+0x91/0xf0 [ 29.852879] print_report+0xcc/0x620 [ 29.853365] ? __virt_addr_valid+0x102/0x340 [ 29.853911] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.854525] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.855137] kasan_report+0xbe/0xf0 [ 29.855608] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.856224] vma_interval_tree_remove+0xc75/0xec0 [ 29.856826] vma_prepare+0xc54/0x11a0 [ 29.857301] __split_vma+0x5af/0x950 [ 29.857770] ? __pfx___split_vma+0x10/0x10 [ 29.858298] ? find_held_lock+0x2c/0x110 [ 29.858812] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.859370] ? lock_is_held_type+0x9f/0x120 [ 29.859904] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.860504] ? mtree_range_walk+0x632/0x900 [ 29.861081] ? mas_walk+0x5c7/0x7c0 [ 29.861562] do_vmi_munmap+0x1f1/0x2b0 [ 29.862056] mmap_region+0x1f9/0x2660 [ 29.862534] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.863037] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.863738] ? __pfx_lock_acquire+0x10/0x10 [ 29.864267] ? __pfx_mmap_region+0x10/0x10 [ 29.864795] ? security_mmap_addr+0x7d/0xa0 [ 29.865324] ? get_unmapped_area+0x1f5/0x3f0 [ 29.865875] do_mmap+0x854/0xf00 [ 29.866314] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.866807] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.867364] ksys_mmap_pgoff+0x3af/0x500 [ 29.867867] do_syscall_64+0x3f/0x90 [ 29.868404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.869113] RIP: 0033:0x7fad55a12d82 [ 29.869573] 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 [ 29.871683] RSP: 002b:00007ffeaa270ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.872576] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad55a12d82 [ 29.873435] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad54e4c000 [ 29.874275] RBP: 00007fad54e4c000 R08: 0000000000000009 R09: 0000000000001000 [ 29.875106] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a29bb90ec0 [ 29.875939] R13: 00007ffeaa270ae0 R14: 00007ffeaa270b10 R15: 00007ffeaa270e70 [ 29.876824] [ 29.877114] [ 29.877329] Allocated by task 212: [ 29.877758] kasan_save_stack+0x22/0x50 [ 29.878255] kasan_set_track+0x25/0x30 [ 29.878740] __kasan_slab_alloc+0x59/0x70 [ 29.879255] kmem_cache_alloc+0x16b/0x370 [ 29.879773] vm_area_dup+0x20/0x160 [ 29.880222] __split_vma+0x170/0x950 [ 29.880699] split_vma+0xc6/0x110 [ 29.881139] mprotect_fixup+0x8d2/0xb30 [ 29.881631] do_mprotect_pkey+0x87e/0xd40 [ 29.882146] __x64_sys_mprotect+0x78/0xc0 [ 29.882662] do_syscall_64+0x3f/0x90 [ 29.883138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.883773] [ 29.883986] Freed by task 212: [ 29.884377] kasan_save_stack+0x22/0x50 [ 29.884884] kasan_set_track+0x25/0x30 [ 29.885373] kasan_save_free_info+0x2b/0x50 [ 29.885905] __kasan_slab_free+0x10a/0x190 [ 29.886430] kmem_cache_free+0x10d/0x4d0 [ 29.886932] rcu_core+0x8c8/0x2860 [ 29.887373] __do_softirq+0x1b7/0x7d4 [ 29.887846] [ 29.888063] Last potentially related work creation: [ 29.888658] kasan_save_stack+0x22/0x50 [ 29.889166] __kasan_record_aux_stack+0x8e/0xa0 [ 29.889734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.890427] remove_vma+0x139/0x170 [ 29.890883] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.891434] do_vmi_munmap+0x1f1/0x2b0 [ 29.891914] __vm_munmap+0x138/0x3a0 [ 29.892373] __x64_sys_munmap+0x59/0x80 [ 29.892873] do_syscall_64+0x3f/0x90 [ 29.893346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.893981] [ 29.894197] Second to last potentially related work creation: [ 29.894876] kasan_save_stack+0x22/0x50 [ 29.895374] __kasan_record_aux_stack+0x8e/0xa0 [ 29.895947] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.896580] remove_vma+0x139/0x170 [ 29.897041] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.897593] do_vmi_munmap+0x1f1/0x2b0 [ 29.898071] mmap_region+0x1f9/0x2660 [ 29.898539] do_mmap+0x854/0xf00 [ 29.898972] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.899453] ksys_mmap_pgoff+0x3af/0x500 [ 29.899945] do_syscall_64+0x3f/0x90 [ 29.900414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.901054] [ 29.901259] The buggy address belongs to the object at ffff88800df541d0 [ 29.901259] which belongs to the cache vm_area_struct of size 168 [ 29.902956] The buggy address is located 88 bytes inside of [ 29.902956] freed 168-byte region [ffff88800df541d0, ffff88800df54278) [ 29.904650] [ 29.905028] The buggy address belongs to the physical page: [ 29.905684] page:00000000203427a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf54 [ 29.906765] memcg:ffff88800d144801 [ 29.907204] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.907903] page_type: 0xffffffff() [ 29.908441] raw: 0100000000000200 ffff8880087a0c80 ffffea000037d300 dead000000000008 [ 29.909596] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d144801 [ 29.910707] page dumped because: kasan: bad access detected [ 29.911504] [ 29.911760] Memory state around the buggy address: [ 29.912474] ffff88800df54100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.913307] ffff88800df54180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.914148] >ffff88800df54200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.914994] ^ [ 29.915543] ffff88800df54280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.916413] ffff88800df54300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.917295] ================================================================== [ 29.918293] Disabling lock debugging due to kernel taint [ 31.888008] BUG: Bad rss-counter state mm:00000000959f8cf4 type:MM_FILEPAGES val:33 [ 31.888695] BUG: Bad rss-counter state mm:00000000959f8cf4 type:MM_ANONPAGES val:22 [ 32.288014] BUG: Bad rss-counter state mm:00000000c9b18cdc type:MM_FILEPAGES val:33 [ 32.289257] BUG: Bad rss-counter state mm:00000000c9b18cdc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39596' (ECDSA) to the list of known hosts. 2023/06/21 10:43:03 fuzzer started 2023/06/21 10:43:03 dialing manager at localhost:36067 2023/06/21 10:43:03 checking machine... 2023/06/21 10:43:03 checking revisions... [ 32.902357] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:43:03 testing simple program... [ 32.944568] cgroup: Unknown subsys name 'net' [ 32.997224] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:43:03 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=00007fa2d6e0cb00 CR3=000000000e3d4000 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=02fbdad3bc19398bc5476276f4735893 XMM02=2c67c8bc2e329bc3000000000011aa30 XMM03=fb795ef6d65770560000000000121ed0 XMM04=1a17f25065811b1d00000000000ae988 XMM05=fd3b32caf5f842420000000000133e38 XMM06=806171799158d9670000000000132ed8 XMM07=e042d86d42eb936e0000000000122150 XMM08=1b40e15ce8e51eaa000000000011aa90 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002d78d8f RBX=ffff888016bc6c48 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888016bc6c78 RBP=ffff888019271dd0 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88801926b980 R14=ffffffff818d9c06 R15=ffff88800edb1000 RIP=ffffffff818464e2 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 00007f7cf71c5900 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=00007f7cf718a008 CR3=000000000ec08000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000