syzkaller login: [ 31.214940] BUG: Bad rss-counter state mm:0000000001e03f8d type:MM_FILEPAGES val:33 [ 31.216394] BUG: Bad rss-counter state mm:0000000001e03f8d type:MM_ANONPAGES val:22 [ 31.385904] ================================================================== [ 31.386888] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.387846] Read of size 8 at addr ffff8880098074e0 by task sshd/219 [ 31.388638] [ 31.388867] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.389873] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.390901] Call Trace: [ 31.391252] [ 31.391544] dump_stack_lvl+0x91/0xf0 [ 31.392054] print_report+0xcc/0x620 [ 31.392562] ? __virt_addr_valid+0x102/0x340 [ 31.393142] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.393775] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.394428] kasan_report+0xbe/0xf0 [ 31.394921] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.395566] vma_interval_tree_remove+0xc75/0xec0 [ 31.396182] vma_prepare+0xc54/0x11a0 [ 31.396675] __split_vma+0x5af/0x950 [ 31.397167] ? __pfx___split_vma+0x10/0x10 [ 31.397723] ? find_held_lock+0x2c/0x110 [ 31.398289] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.398882] ? lock_is_held_type+0x9f/0x120 [ 31.399443] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.400075] ? mtree_range_walk+0x632/0x900 [ 31.400641] ? mas_walk+0x5c7/0x7c0 [ 31.401144] do_vmi_munmap+0x1f1/0x2b0 [ 31.401659] mmap_region+0x1f9/0x2660 [ 31.402176] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.402714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.403447] ? __pfx_lock_acquire+0x10/0x10 [ 31.403992] ? __pfx_mmap_region+0x10/0x10 [ 31.404540] ? security_mmap_addr+0x7d/0xa0 [ 31.405091] ? get_unmapped_area+0x1f5/0x3f0 [ 31.405660] do_mmap+0x854/0xf00 [ 31.406132] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.406650] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.407246] ksys_mmap_pgoff+0x3af/0x500 [ 31.407766] do_syscall_64+0x3f/0x90 [ 31.408255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.408924] RIP: 0033:0x7fc4574f9d82 [ 31.409403] 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 [ 31.411606] RSP: 002b:00007ffc102dde08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.412549] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4574f9d82 [ 31.413446] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc456933000 [ 31.414330] RBP: 00007fc456933000 R08: 0000000000000009 R09: 0000000000001000 [ 31.415200] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a888b0ef70 [ 31.416056] R13: 00007ffc102dde20 R14: 00007ffc102dde50 R15: 00007ffc102de1b0 [ 31.416933] [ 31.417238] [ 31.417455] Allocated by task 212: [ 31.417898] kasan_save_stack+0x22/0x50 [ 31.418428] kasan_set_track+0x25/0x30 [ 31.418927] __kasan_slab_alloc+0x59/0x70 [ 31.419460] kmem_cache_alloc+0x16b/0x370 [ 31.419974] vm_area_dup+0x20/0x160 [ 31.420428] __split_vma+0x170/0x950 [ 31.420892] split_vma+0xc6/0x110 [ 31.421326] mprotect_fixup+0x8d2/0xb30 [ 31.421824] do_mprotect_pkey+0x87e/0xd40 [ 31.422362] __x64_sys_mprotect+0x78/0xc0 [ 31.422881] do_syscall_64+0x3f/0x90 [ 31.423354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.423996] [ 31.424221] Freed by task 212: [ 31.424613] kasan_save_stack+0x22/0x50 [ 31.425121] kasan_set_track+0x25/0x30 [ 31.425613] kasan_save_free_info+0x2b/0x50 [ 31.426163] __kasan_slab_free+0x10a/0x190 [ 31.426700] kmem_cache_free+0x10d/0x4d0 [ 31.427205] rcu_core+0x8c8/0x2860 [ 31.427660] __do_softirq+0x1b7/0x7d4 [ 31.428133] [ 31.428352] Last potentially related work creation: [ 31.428937] kasan_save_stack+0x22/0x50 [ 31.429439] __kasan_record_aux_stack+0x8e/0xa0 [ 31.430020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.430662] remove_vma+0x139/0x170 [ 31.431112] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.431665] do_vmi_munmap+0x1f1/0x2b0 [ 31.432153] __vm_munmap+0x138/0x3a0 [ 31.432619] __x64_sys_munmap+0x59/0x80 [ 31.433120] do_syscall_64+0x3f/0x90 [ 31.433596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.434254] [ 31.434468] Second to last potentially related work creation: [ 31.435170] kasan_save_stack+0x22/0x50 [ 31.435670] __kasan_record_aux_stack+0x8e/0xa0 [ 31.436250] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.436890] remove_vma+0x139/0x170 [ 31.437339] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.437889] do_vmi_munmap+0x1f1/0x2b0 [ 31.438388] mmap_region+0x1f9/0x2660 [ 31.438863] do_mmap+0x854/0xf00 [ 31.439304] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.439797] ksys_mmap_pgoff+0x3af/0x500 [ 31.440300] do_syscall_64+0x3f/0x90 [ 31.440773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.441426] [ 31.441644] The buggy address belongs to the object at ffff888009807488 [ 31.441644] which belongs to the cache vm_area_struct of size 168 [ 31.443126] The buggy address is located 88 bytes inside of [ 31.443126] freed 168-byte region [ffff888009807488, ffff888009807530) [ 31.444515] [ 31.444731] The buggy address belongs to the physical page: [ 31.445397] page:00000000efea4cee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9807 [ 31.446491] memcg:ffff88800e74a701 [ 31.446922] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.447563] page_type: 0xffffffff() [ 31.448013] raw: 0100000000000200 ffff88800879fc80 ffffea000036d800 dead000000000002 [ 31.448935] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e74a701 [ 31.449857] page dumped because: kasan: bad access detected [ 31.450534] [ 31.450747] Memory state around the buggy address: [ 31.451331] ffff888009807380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.452200] ffff888009807400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.453063] >ffff888009807480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.453917] ^ [ 31.454685] ffff888009807500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.455567] ffff888009807580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.456427] ================================================================== [ 31.457880] Disabling lock debugging due to kernel taint [ 33.459632] BUG: Bad rss-counter state mm:000000009eeeb87e type:MM_FILEPAGES val:33 [ 33.460822] BUG: Bad rss-counter state mm:000000009eeeb87e type:MM_ANONPAGES val:22 [ 33.883770] BUG: Bad rss-counter state mm:00000000012edeec type:MM_FILEPAGES val:33 [ 33.884957] BUG: Bad rss-counter state mm:00000000012edeec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57678' (ECDSA) to the list of known hosts. 2023/06/20 07:21:50 fuzzer started 2023/06/20 07:21:50 dialing manager at localhost:44161 2023/06/20 07:21:50 checking machine... 2023/06/20 07:21:50 checking revisions... [ 34.614863] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:21:50 testing simple program... [ 34.665391] cgroup: Unknown subsys name 'net' [ 34.723221] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:21:49 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000e388684a RCX=ffff88806c834250 RDX=000000000000000c RSI=0000000000000003 RDI=00000000496be171 RBP=ffff88800d5f2560 RSP=ffff88800ca97a70 R8 =0000000054be1304 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000800 R14=ffff88800ca97af8 R15=000000000000000c RIP=ffffffff82270f13 RFL=00000202 [-------] 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 00007f3caf395900 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=00007f3caf94d0b0 CR3=000000001abfe000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ff23d218be0 CR3=000000000d5e0000 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=ac7270ffb6a58ca572434e91823cbdb7 XMM02=000000000011cb70ec2efd57dc4c00df XMM03=00000000001243e07e37bff7b3120faf XMM04=b7ab8814a460bfd700000000000ae988 XMM05=dfcdbad4f1609c3700000000001352d0 XMM06=7d9c1e10b167b2630000000000134138 XMM07=e042d86d42eb936e0000000000124660 XMM08=7e37bff7b3120faf000000000011cbd0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000