syzkaller login: [ 30.900295] BUG: Bad rss-counter state mm:00000000cc0c93d9 type:MM_FILEPAGES val:33 [ 30.901490] BUG: Bad rss-counter state mm:00000000cc0c93d9 type:MM_ANONPAGES val:22 [ 30.937464] ================================================================== [ 30.938463] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.939424] Read of size 8 at addr ffff8880166ad310 by task sshd/222 [ 30.940297] [ 30.940525] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.941400] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.942388] Call Trace: [ 30.942714] [ 30.943008] dump_stack_lvl+0x91/0xf0 [ 30.943524] print_report+0xcc/0x620 [ 30.944017] ? __virt_addr_valid+0x102/0x340 [ 30.944574] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.945193] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.945811] kasan_report+0xbe/0xf0 [ 30.946287] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.946918] vma_interval_tree_remove+0xc75/0xec0 [ 30.947558] vma_prepare+0xc54/0x11a0 [ 30.948039] __split_vma+0x5af/0x950 [ 30.948521] ? __pfx___split_vma+0x10/0x10 [ 30.949053] ? find_held_lock+0x2c/0x110 [ 30.949577] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.950143] ? lock_is_held_type+0x9f/0x120 [ 30.950688] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.951299] ? mtree_range_walk+0x632/0x900 [ 30.951863] ? mas_walk+0x5c7/0x7c0 [ 30.952342] do_vmi_munmap+0x1f1/0x2b0 [ 30.952847] mmap_region+0x1f9/0x2660 [ 30.953335] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.953851] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.954570] ? __pfx_lock_acquire+0x10/0x10 [ 30.955112] ? __pfx_mmap_region+0x10/0x10 [ 30.955654] ? security_mmap_addr+0x7d/0xa0 [ 30.956190] ? get_unmapped_area+0x1f5/0x3f0 [ 30.956742] do_mmap+0x854/0xf00 [ 30.957183] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.957687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.958259] ksys_mmap_pgoff+0x3af/0x500 [ 30.958775] do_syscall_64+0x3f/0x90 [ 30.959257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.959931] RIP: 0033:0x7ff691a5ed82 [ 30.960397] 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 [ 30.962523] RSP: 002b:00007fff1bf43078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.963441] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff691a5ed82 [ 30.964308] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff690e98000 [ 30.965153] RBP: 00007ff690e98000 R08: 0000000000000009 R09: 0000000000001000 [ 30.966002] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561dfe041ec0 [ 30.966847] R13: 00007fff1bf43090 R14: 00007fff1bf430c0 R15: 00007fff1bf43420 [ 30.967715] [ 30.968013] [ 30.968236] Allocated by task 215: [ 30.968664] kasan_save_stack+0x22/0x50 [ 30.969174] kasan_set_track+0x25/0x30 [ 30.969678] __kasan_slab_alloc+0x59/0x70 [ 30.970201] kmem_cache_alloc+0x16b/0x370 [ 30.970728] vm_area_dup+0x20/0x160 [ 30.971188] __split_vma+0x170/0x950 [ 30.971682] split_vma+0xc6/0x110 [ 30.972124] mprotect_fixup+0x8d2/0xb30 [ 30.972635] do_mprotect_pkey+0x87e/0xd40 [ 30.973155] __x64_sys_mprotect+0x78/0xc0 [ 30.973685] do_syscall_64+0x3f/0x90 [ 30.974164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.974811] [ 30.975032] Freed by task 215: [ 30.975422] kasan_save_stack+0x22/0x50 [ 30.975933] kasan_set_track+0x25/0x30 [ 30.976427] kasan_save_free_info+0x2b/0x50 [ 30.976961] __kasan_slab_free+0x10a/0x190 [ 30.977502] kmem_cache_free+0x10d/0x4d0 [ 30.978015] rcu_core+0x8c8/0x2860 [ 30.978458] __do_softirq+0x1b7/0x7d4 [ 30.978937] [ 30.979153] Last potentially related work creation: [ 30.979770] kasan_save_stack+0x22/0x50 [ 30.980279] __kasan_record_aux_stack+0x8e/0xa0 [ 30.980866] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.981516] remove_vma+0x139/0x170 [ 30.981967] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.982525] do_vmi_munmap+0x1f1/0x2b0 [ 30.983011] __vm_munmap+0x138/0x3a0 [ 30.983484] __x64_sys_munmap+0x59/0x80 [ 30.984009] do_syscall_64+0x3f/0x90 [ 30.984487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.985140] [ 30.985359] The buggy address belongs to the object at ffff8880166ad2b8 [ 30.985359] which belongs to the cache vm_area_struct of size 168 [ 30.986849] The buggy address is located 88 bytes inside of [ 30.986849] freed 168-byte region [ffff8880166ad2b8, ffff8880166ad360) [ 30.988314] [ 30.988532] The buggy address belongs to the physical page: [ 30.989206] page:00000000b91ab1ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166ad [ 30.990320] memcg:ffff88800eceaf01 [ 30.990752] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.991401] page_type: 0xffffffff() [ 30.991877] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.992800] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eceaf01 [ 30.993707] page dumped because: kasan: bad access detected [ 30.994372] [ 30.994591] Memory state around the buggy address: [ 30.995173] ffff8880166ad200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.996057] ffff8880166ad280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.996916] >ffff8880166ad300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.997781] ^ [ 30.998243] ffff8880166ad380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.999112] ffff8880166ad400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.999976] ================================================================== [ 31.001132] Disabling lock debugging due to kernel taint [ 32.642637] BUG: Bad rss-counter state mm:00000000f8a22ae8 type:MM_FILEPAGES val:33 [ 32.643776] BUG: Bad rss-counter state mm:00000000f8a22ae8 type:MM_ANONPAGES val:22 [ 33.123811] BUG: Bad rss-counter state mm:000000000dacf453 type:MM_FILEPAGES val:33 [ 33.125089] BUG: Bad rss-counter state mm:000000000dacf453 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38920' (ECDSA) to the list of known hosts. 2023/06/20 18:30:03 fuzzer started 2023/06/20 18:30:04 dialing manager at localhost:36067 2023/06/20 18:30:04 checking machine... 2023/06/20 18:30:04 checking revisions... [ 33.731028] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:30:04 testing simple program... [ 33.785790] cgroup: Unknown subsys name 'net' [ 33.822905] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:30:03 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=ffff888008c04000 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=00007f8c1b820630 CR3=000000000d716000 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=2033303a30333a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a30333a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800fe5fa40 RSP=ffff88800fe5f928 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88800fe5fa48 R13=ffff88800fe5fa30 R14=ffff88800fe5fa29 R15=ffff88800fe5f9e8 RIP=ffffffff81130ad6 RFL=00000246 [---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 00007f6a1a68b900 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=00007ffcb4f08000 CR3=000000001bb60000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000