syzkaller login: [ 41.694921] BUG: Bad rss-counter state mm:000000005329185a type:MM_FILEPAGES val:33 [ 41.696182] BUG: Bad rss-counter state mm:000000005329185a type:MM_ANONPAGES val:22 [ 41.856483] ================================================================== [ 41.857417] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.858368] Read of size 8 at addr ffff88800fc88ed8 by task sshd/221 [ 41.859187] [ 41.859405] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.860301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.861308] Call Trace: [ 41.861637] [ 41.861934] dump_stack_lvl+0x91/0xf0 [ 41.862437] print_report+0xcc/0x620 [ 41.862970] ? __virt_addr_valid+0x102/0x340 [ 41.863535] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.864174] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.864809] kasan_report+0xbe/0xf0 [ 41.865300] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.865946] vma_interval_tree_remove+0xc75/0xec0 [ 41.866571] vma_prepare+0xc54/0x11a0 [ 41.867067] __split_vma+0x5af/0x950 [ 41.867560] ? __pfx___split_vma+0x10/0x10 [ 41.868097] ? find_held_lock+0x2c/0x110 [ 41.868621] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.869200] ? lock_is_held_type+0x9f/0x120 [ 41.869744] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.870356] ? mtree_range_walk+0x632/0x900 [ 41.870939] ? mas_walk+0x5c7/0x7c0 [ 41.871415] do_vmi_munmap+0x1f1/0x2b0 [ 41.871911] mmap_region+0x1f9/0x2660 [ 41.872397] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.872917] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.873629] ? __pfx_lock_acquire+0x10/0x10 [ 41.874170] ? __pfx_mmap_region+0x10/0x10 [ 41.874714] ? security_mmap_addr+0x7d/0xa0 [ 41.875252] ? get_unmapped_area+0x1f5/0x3f0 [ 41.875818] do_mmap+0x854/0xf00 [ 41.876278] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.876799] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.877374] ksys_mmap_pgoff+0x3af/0x500 [ 41.877889] do_syscall_64+0x3f/0x90 [ 41.878378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.879048] RIP: 0033:0x7f8d9e705d82 [ 41.879518] 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 [ 41.881728] RSP: 002b:00007ffe6ca75ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.882670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d9e705d82 [ 41.883555] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d9db3f000 [ 41.884441] RBP: 00007f8d9db3f000 R08: 0000000000000009 R09: 0000000000001000 [ 41.885286] R10: 0000000000000812 R11: 0000000000000206 R12: 00005567dbf2eec0 [ 41.886132] R13: 00007ffe6ca75ee0 R14: 00007ffe6ca75f10 R15: 00007ffe6ca76270 [ 41.887027] [ 41.887319] [ 41.887542] Allocated by task 214: [ 41.887981] kasan_save_stack+0x22/0x50 [ 41.888508] kasan_set_track+0x25/0x30 [ 41.889037] __kasan_slab_alloc+0x59/0x70 [ 41.889571] kmem_cache_alloc+0x16b/0x370 [ 41.890089] vm_area_dup+0x20/0x160 [ 41.890546] __split_vma+0x170/0x950 [ 41.891025] split_vma+0xc6/0x110 [ 41.891490] mprotect_fixup+0x8d2/0xb30 [ 41.892017] do_mprotect_pkey+0x87e/0xd40 [ 41.892556] __x64_sys_mprotect+0x78/0xc0 [ 41.893114] do_syscall_64+0x3f/0x90 [ 41.893603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.894266] [ 41.894498] Freed by task 214: [ 41.894926] kasan_save_stack+0x22/0x50 [ 41.895440] kasan_set_track+0x25/0x30 [ 41.895952] kasan_save_free_info+0x2b/0x50 [ 41.896488] __kasan_slab_free+0x10a/0x190 [ 41.897041] kmem_cache_free+0x10d/0x4d0 [ 41.897563] rcu_core+0x8c8/0x2860 [ 41.898021] __do_softirq+0x1b7/0x7d4 [ 41.898511] [ 41.898742] Last potentially related work creation: [ 41.899348] kasan_save_stack+0x22/0x50 [ 41.899871] __kasan_record_aux_stack+0x8e/0xa0 [ 41.900475] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.901148] remove_vma+0x139/0x170 [ 41.901599] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.902162] do_vmi_munmap+0x1f1/0x2b0 [ 41.902664] __vm_munmap+0x138/0x3a0 [ 41.903135] __x64_sys_munmap+0x59/0x80 [ 41.903644] do_syscall_64+0x3f/0x90 [ 41.904125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.904770] [ 41.904990] The buggy address belongs to the object at ffff88800fc88e80 [ 41.904990] which belongs to the cache vm_area_struct of size 168 [ 41.906464] The buggy address is located 88 bytes inside of [ 41.906464] freed 168-byte region [ffff88800fc88e80, ffff88800fc88f28) [ 41.907910] [ 41.908125] The buggy address belongs to the physical page: [ 41.908827] page:000000004d7cb3d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc88 [ 41.909914] memcg:ffff8880164c8a01 [ 41.910343] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.911014] page_type: 0xffffffff() [ 41.911473] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.912431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164c8a01 [ 41.913334] page dumped because: kasan: bad access detected [ 41.914011] [ 41.914231] Memory state around the buggy address: [ 41.914820] ffff88800fc88d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.915682] ffff88800fc88e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 41.916543] >ffff88800fc88e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.917399] ^ [ 41.918128] ffff88800fc88f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 41.919027] ffff88800fc88f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 41.919886] ================================================================== [ 41.921272] Disabling lock debugging due to kernel taint [ 44.037831] BUG: Bad rss-counter state mm:0000000058c9d9ab type:MM_FILEPAGES val:33 [ 44.038855] BUG: Bad rss-counter state mm:0000000058c9d9ab type:MM_ANONPAGES val:22 [ 44.536852] BUG: Bad rss-counter state mm:00000000691f9d0d type:MM_FILEPAGES val:33 [ 44.538022] BUG: Bad rss-counter state mm:00000000691f9d0d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19749' (ECDSA) to the list of known hosts. 2023/06/20 00:30:41 fuzzer started 2023/06/20 00:30:41 dialing manager at localhost:44161 2023/06/20 00:30:41 checking machine... 2023/06/20 00:30:41 checking revisions... [ 45.255981] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:30:41 testing simple program... [ 45.299142] cgroup: Unknown subsys name 'net' [ 45.337045] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:30:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd5a0e2b110 CR3=000000000d70e000 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=2031343a30333a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a30333a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff888017e29b40 RSI=00000000000001b4 RDI=ffffffff84d648c0 RBP=ffff888016757d90 RSP=ffff888016757c90 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000002 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000001 R14=ffff888006a9d6b8 R15=ffff888006a9d080 RIP=ffffffff8122e8c4 RFL=00000293 [--S-A-C] 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 00007fbad60a9900 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=00007ffcb84e9000 CR3=000000001befa000 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=6720646572637465733a4d41503d706f 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