syzkaller login: [ 30.196723] BUG: Bad rss-counter state mm:000000000f371316 type:MM_FILEPAGES val:33 [ 30.197922] BUG: Bad rss-counter state mm:000000000f371316 type:MM_ANONPAGES val:22 [ 30.347607] ================================================================== [ 30.348517] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.349461] Read of size 8 at addr ffff8880165e1880 by task sshd/220 [ 30.350230] [ 30.350445] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.351407] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.352370] Call Trace: [ 30.352697] <TASK> [ 30.352982] dump_stack_lvl+0x91/0xf0 [ 30.353490] print_report+0xcc/0x620 [ 30.353979] ? __virt_addr_valid+0x102/0x340 [ 30.354547] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.355156] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.355771] kasan_report+0xbe/0xf0 [ 30.356244] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.356864] vma_interval_tree_remove+0xc75/0xec0 [ 30.357465] vma_prepare+0xc54/0x11a0 [ 30.357938] __split_vma+0x5af/0x950 [ 30.358417] ? __pfx___split_vma+0x10/0x10 [ 30.358938] ? find_held_lock+0x2c/0x110 [ 30.359450] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.360005] ? lock_is_held_type+0x9f/0x120 [ 30.360547] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.361147] ? mtree_range_walk+0x632/0x900 [ 30.361692] ? mas_walk+0x5c7/0x7c0 [ 30.362186] do_vmi_munmap+0x1f1/0x2b0 [ 30.362676] mmap_region+0x1f9/0x2660 [ 30.363157] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.363664] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.364368] ? __pfx_lock_acquire+0x10/0x10 [ 30.364891] ? __pfx_mmap_region+0x10/0x10 [ 30.365430] ? security_mmap_addr+0x7d/0xa0 [ 30.365985] ? get_unmapped_area+0x1f5/0x3f0 [ 30.366577] do_mmap+0x854/0xf00 [ 30.367038] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.367546] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.368136] ksys_mmap_pgoff+0x3af/0x500 [ 30.368666] do_syscall_64+0x3f/0x90 [ 30.369168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.369843] RIP: 0033:0x7f77b351ed82 [ 30.370337] 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 [ 30.372597] RSP: 002b:00007ffe95700548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.373556] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f77b351ed82 [ 30.374450] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f77b2958000 [ 30.375346] RBP: 00007f77b2958000 R08: 0000000000000009 R09: 0000000000001000 [ 30.376237] R10: 0000000000000812 R11: 0000000000000206 R12: 000056330223aec0 [ 30.377134] R13: 00007ffe95700560 R14: 00007ffe95700590 R15: 00007ffe957008f0 [ 30.378036] </TASK> [ 30.378352] [ 30.378574] Allocated by task 213: [ 30.379019] kasan_save_stack+0x22/0x50 [ 30.379546] kasan_set_track+0x25/0x30 [ 30.380063] __kasan_slab_alloc+0x59/0x70 [ 30.380606] kmem_cache_alloc+0x16b/0x370 [ 30.381146] vm_area_dup+0x20/0x160 [ 30.381621] __split_vma+0x170/0x950 [ 30.382132] split_vma+0xc6/0x110 [ 30.382592] mprotect_fixup+0x8d2/0xb30 [ 30.383120] do_mprotect_pkey+0x87e/0xd40 [ 30.383666] __x64_sys_mprotect+0x78/0xc0 [ 30.384209] do_syscall_64+0x3f/0x90 [ 30.384703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.385367] [ 30.385588] Freed by task 213: [ 30.385995] kasan_save_stack+0x22/0x50 [ 30.386532] kasan_set_track+0x25/0x30 [ 30.387046] kasan_save_free_info+0x2b/0x50 [ 30.387602] __kasan_slab_free+0x10a/0x190 [ 30.388158] kmem_cache_free+0x10d/0x4d0 [ 30.388690] rcu_core+0x8c8/0x2860 [ 30.389155] __do_softirq+0x1b7/0x7d4 [ 30.389653] [ 30.389877] Last potentially related work creation: [ 30.390497] kasan_save_stack+0x22/0x50 [ 30.391028] __kasan_record_aux_stack+0x8e/0xa0 [ 30.391636] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.392303] remove_vma+0x139/0x170 [ 30.392767] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.393354] do_vmi_munmap+0x1f1/0x2b0 [ 30.393867] __vm_munmap+0x138/0x3a0 [ 30.394374] __x64_sys_munmap+0x59/0x80 [ 30.394891] do_syscall_64+0x3f/0x90 [ 30.395380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.396061] [ 30.396285] The buggy address belongs to the object at ffff8880165e1828 [ 30.396285] which belongs to the cache vm_area_struct of size 168 [ 30.397834] The buggy address is located 88 bytes inside of [ 30.397834] freed 168-byte region [ffff8880165e1828, ffff8880165e18d0) [ 30.399334] [ 30.399557] The buggy address belongs to the physical page: [ 30.400246] page:00000000afce90ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165e1 [ 30.401402] memcg:ffff8880144d3101 [ 30.401849] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.402536] page_type: 0xffffffff() [ 30.403006] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.403959] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144d3101 [ 30.404924] page dumped because: kasan: bad access detected [ 30.405629] [ 30.405855] Memory state around the buggy address: [ 30.406467] ffff8880165e1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.407377] ffff8880165e1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.408272] >ffff8880165e1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.409178] ^ [ 30.409615] ffff8880165e1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.410545] ffff8880165e1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.411437] ================================================================== [ 30.412534] Disabling lock debugging due to kernel taint [ 32.273491] BUG: Bad rss-counter state mm:0000000078b60553 type:MM_FILEPAGES val:33 [ 32.274533] BUG: Bad rss-counter state mm:0000000078b60553 type:MM_ANONPAGES val:22 [ 32.730298] BUG: Bad rss-counter state mm:00000000cebcef60 type:MM_FILEPAGES val:33 [ 32.731281] BUG: Bad rss-counter state mm:00000000cebcef60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63262' (ECDSA) to the list of known hosts. 2023/06/21 03:06:55 fuzzer started 2023/06/21 03:06:55 dialing manager at localhost:36067 2023/06/21 03:06:55 checking machine... 2023/06/21 03:06:55 checking revisions... [ 33.437828] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:06:55 testing simple program... [ 33.479074] cgroup: Unknown subsys name 'net' [ 33.519521] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:06:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce39500 RCX=0000000000000000 RDX=1ffff1100d9c73fc RSI=0000000000000004 RDI=0000000000000000 RBP=1ffff110028e3f28 RSP=ffff88801471f910 R8 =0000000000000001 R9 =ffffed10028e3f36 R10=0000000000000003 R11=0000000000000000 R12=ffff88806ce39500 R13=ffff88806ce39fe0 R14=ffff88806ce39f08 R15=0000000000000001 RIP=ffffffff810a6564 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 00007f209b5e2900 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=00007f209aa5bba0 CR3=000000000c52a000 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=134b3e5b8eb01293b746e95b6c86db09 XMM02=000000000011b708eff9b2d0a8fce9cb XMM03=000000000011b7d82c67c8bc2e329bc3 XMM04=d8f4fcc3ca2c07b300000000000ae988 XMM05=ea3eff0f6b42f97f0000000000132870 XMM06=4fda316b135da52b0000000000132268 XMM07=e042d86d42eb936e00000000001224d0 XMM08=0359fa12edc1d443000000000011b7d8 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=00007f6d2f6780b0 CR3=000000000cc8e000 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=36303a3330203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363133 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000