syzkaller login: [ 30.928621] BUG: Bad rss-counter state mm:0000000036c04133 type:MM_FILEPAGES val:33 [ 30.929378] BUG: Bad rss-counter state mm:0000000036c04133 type:MM_ANONPAGES val:22 [ 30.960835] ================================================================== [ 30.961538] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.962240] Read of size 8 at addr ffff88800eaeddf0 by task sshd/220 [ 30.962819] [ 30.962981] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.963615] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.964449] Call Trace: [ 30.964692] [ 30.964893] dump_stack_lvl+0x91/0xf0 [ 30.965271] print_report+0xcc/0x620 [ 30.965638] ? __virt_addr_valid+0x102/0x340 [ 30.966043] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.966552] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.967015] kasan_report+0xbe/0xf0 [ 30.967355] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.967795] vma_interval_tree_remove+0xc75/0xec0 [ 30.968268] vma_prepare+0xc54/0x11a0 [ 30.968628] __split_vma+0x5af/0x950 [ 30.968963] ? __pfx___split_vma+0x10/0x10 [ 30.969345] ? find_held_lock+0x2c/0x110 [ 30.969736] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.970148] ? lock_is_held_type+0x9f/0x120 [ 30.970558] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.970999] ? mtree_range_walk+0x632/0x900 [ 30.971429] ? mas_walk+0x5c7/0x7c0 [ 30.971790] do_vmi_munmap+0x1f1/0x2b0 [ 30.972176] mmap_region+0x1f9/0x2660 [ 30.972521] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.972934] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.973465] ? __pfx_lock_acquire+0x10/0x10 [ 30.973858] ? __pfx_mmap_region+0x10/0x10 [ 30.974288] ? security_mmap_addr+0x7d/0xa0 [ 30.974690] ? get_unmapped_area+0x1f5/0x3f0 [ 30.975078] do_mmap+0x854/0xf00 [ 30.975390] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.975739] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.976131] ksys_mmap_pgoff+0x3af/0x500 [ 30.976458] do_syscall_64+0x3f/0x90 [ 30.976778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.977254] RIP: 0033:0x7f8081ac6d82 [ 30.977566] 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 [ 30.979099] RSP: 002b:00007ffc99aa7ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.979732] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8081ac6d82 [ 30.980343] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8080f00000 [ 30.980976] RBP: 00007f8080f00000 R08: 0000000000000009 R09: 0000000000001000 [ 30.981607] R10: 0000000000000812 R11: 0000000000000206 R12: 00005626e35ffd90 [ 30.982244] R13: 00007ffc99aa7ef0 R14: 00007ffc99aa7f20 R15: 00007ffc99aa8280 [ 30.982898] [ 30.983109] [ 30.983261] Allocated by task 213: [ 30.983563] kasan_save_stack+0x22/0x50 [ 30.983951] kasan_set_track+0x25/0x30 [ 30.984300] __kasan_slab_alloc+0x59/0x70 [ 30.984684] kmem_cache_alloc+0x16b/0x370 [ 30.985038] vm_area_dup+0x20/0x160 [ 30.985363] __split_vma+0x170/0x950 [ 30.985689] split_vma+0xc6/0x110 [ 30.986000] mprotect_fixup+0x8d2/0xb30 [ 30.986365] do_mprotect_pkey+0x87e/0xd40 [ 30.986775] __x64_sys_mprotect+0x78/0xc0 [ 30.987169] do_syscall_64+0x3f/0x90 [ 30.987499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.987961] [ 30.988124] Freed by task 213: [ 30.988399] kasan_save_stack+0x22/0x50 [ 30.988770] kasan_set_track+0x25/0x30 [ 30.989140] kasan_save_free_info+0x2b/0x50 [ 30.989505] __kasan_slab_free+0x10a/0x190 [ 30.989857] kmem_cache_free+0x10d/0x4d0 [ 30.990192] rcu_core+0x8c8/0x2860 [ 30.990513] __do_softirq+0x1b7/0x7d4 [ 30.990839] [ 30.990984] Last potentially related work creation: [ 30.991390] kasan_save_stack+0x22/0x50 [ 30.991724] __kasan_record_aux_stack+0x8e/0xa0 [ 30.992124] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.992574] remove_vma+0x139/0x170 [ 30.992915] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.993350] do_vmi_munmap+0x1f1/0x2b0 [ 30.993710] __vm_munmap+0x138/0x3a0 [ 30.994070] __x64_sys_munmap+0x59/0x80 [ 30.994484] do_syscall_64+0x3f/0x90 [ 30.994845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.995314] [ 30.995468] The buggy address belongs to the object at ffff88800eaedd98 [ 30.995468] which belongs to the cache vm_area_struct of size 168 [ 30.996572] The buggy address is located 88 bytes inside of [ 30.996572] freed 168-byte region [ffff88800eaedd98, ffff88800eaede40) [ 30.997616] [ 30.997781] The buggy address belongs to the physical page: [ 30.998272] page:00000000d839b6bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeaed [ 30.999070] memcg:ffff88800c9ffa01 [ 30.999390] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.999874] page_type: 0xffffffff() [ 31.000204] raw: 0100000000000200 ffff8880087a0c80 ffffea0000407440 dead000000000004 [ 31.000902] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9ffa01 [ 31.001566] page dumped because: kasan: bad access detected [ 31.002044] [ 31.002207] Memory state around the buggy address: [ 31.002649] ffff88800eaedc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.003269] ffff88800eaedd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.003925] >ffff88800eaedd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.004582] ^ [ 31.005217] ffff88800eaede00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.005855] ffff88800eaede80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.006506] ================================================================== [ 31.007428] Disabling lock debugging due to kernel taint [ 32.514622] BUG: Bad rss-counter state mm:00000000179c7e5b type:MM_FILEPAGES val:33 [ 32.515320] BUG: Bad rss-counter state mm:00000000179c7e5b type:MM_ANONPAGES val:22 [ 32.853559] BUG: Bad rss-counter state mm:000000007f6d5b4e type:MM_FILEPAGES val:33 [ 32.854247] BUG: Bad rss-counter state mm:000000007f6d5b4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38760' (ECDSA) to the list of known hosts. 2023/06/21 09:07:15 fuzzer started 2023/06/21 09:07:15 dialing manager at localhost:36067 2023/06/21 09:07:15 checking machine... 2023/06/21 09:07:15 checking revisions... [ 33.420110] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:07:16 testing simple program... [ 33.463328] cgroup: Unknown subsys name 'net' [ 33.494762] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:07:15 Registers: info registers vcpu 0 RAX=ffffffff8363ea40 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=ffffffffffffffff RSI=0000000000000000 RDI=ffff888016ab7f58 RBP=ffff888016ab7f48 RSP=ffff888016ab7f38 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888016ab7f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8363ea44 RFL=00000206 [-----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 00007f4101115900 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=00007ffd467ed000 CR3=000000000f2e6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f8199ebfdd0 CR3=000000000cac0000 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=d0d27407fb3a43a9894a13503ce86c6f XMM02=2c67c8bc2e329bc3000000000011a020 XMM03=fb795ef6d657705600000000001215c8 XMM04=6e9d1c801ea4ffa700000000000ae988 XMM05=19e9129bd510f23500000000001313a8 XMM06=bf3b05e64fea26360000000000130210 XMM07=e042d86d42eb936e0000000000121848 XMM08=3b3b532858288021000000000011a080 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000