syzkaller login: [ 30.358913] BUG: Bad rss-counter state mm:000000001ecfbe55 type:MM_FILEPAGES val:33 [ 30.360124] BUG: Bad rss-counter state mm:000000001ecfbe55 type:MM_ANONPAGES val:22 [ 30.521084] ================================================================== [ 30.522170] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.523331] Read of size 8 at addr ffff88800e5ca310 by task sshd/221 [ 30.524270] [ 30.524489] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.525349] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.526348] Call Trace: [ 30.526673] [ 30.526962] dump_stack_lvl+0x91/0xf0 [ 30.527475] print_report+0xcc/0x620 [ 30.527957] ? __virt_addr_valid+0x102/0x340 [ 30.528519] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.529149] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.529770] kasan_report+0xbe/0xf0 [ 30.530252] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.530885] vma_interval_tree_remove+0xc75/0xec0 [ 30.531524] vma_prepare+0xc54/0x11a0 [ 30.532012] __split_vma+0x5af/0x950 [ 30.532484] ? __pfx___split_vma+0x10/0x10 [ 30.533018] ? find_held_lock+0x2c/0x110 [ 30.533552] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.534122] ? lock_is_held_type+0x9f/0x120 [ 30.534672] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.535302] ? mtree_range_walk+0x632/0x900 [ 30.535865] ? mas_walk+0x5c7/0x7c0 [ 30.536344] do_vmi_munmap+0x1f1/0x2b0 [ 30.536838] mmap_region+0x1f9/0x2660 [ 30.537328] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.537847] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.538563] ? __pfx_lock_acquire+0x10/0x10 [ 30.539098] ? __pfx_mmap_region+0x10/0x10 [ 30.539635] ? security_mmap_addr+0x7d/0xa0 [ 30.540170] ? get_unmapped_area+0x1f5/0x3f0 [ 30.540724] do_mmap+0x854/0xf00 [ 30.541162] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.541666] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.542234] ksys_mmap_pgoff+0x3af/0x500 [ 30.542745] do_syscall_64+0x3f/0x90 [ 30.543250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.543910] RIP: 0033:0x7f4537e14d82 [ 30.544372] 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 [ 30.546516] RSP: 002b:00007ffd4a8dde78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.547432] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4537e14d82 [ 30.548281] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f453724e000 [ 30.549135] RBP: 00007f453724e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.549984] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a5b8c3f60 [ 30.550829] R13: 00007ffd4a8dde90 R14: 00007ffd4a8ddec0 R15: 00007ffd4a8de220 [ 30.551699] [ 30.551998] [ 30.552211] Allocated by task 214: [ 30.552645] kasan_save_stack+0x22/0x50 [ 30.553160] kasan_set_track+0x25/0x30 [ 30.553658] __kasan_slab_alloc+0x59/0x70 [ 30.554187] kmem_cache_alloc+0x16b/0x370 [ 30.554713] vm_area_dup+0x20/0x160 [ 30.555195] __split_vma+0x170/0x950 [ 30.555660] split_vma+0xc6/0x110 [ 30.556109] mprotect_fixup+0x8d2/0xb30 [ 30.556610] do_mprotect_pkey+0x87e/0xd40 [ 30.557128] __x64_sys_mprotect+0x78/0xc0 [ 30.557657] do_syscall_64+0x3f/0x90 [ 30.558145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.558810] [ 30.559032] Freed by task 19: [ 30.559421] kasan_save_stack+0x22/0x50 [ 30.559941] kasan_set_track+0x25/0x30 [ 30.560446] kasan_save_free_info+0x2b/0x50 [ 30.560987] __kasan_slab_free+0x10a/0x190 [ 30.561522] kmem_cache_free+0x10d/0x4d0 [ 30.562033] rcu_core+0x8c8/0x2860 [ 30.562484] __do_softirq+0x1b7/0x7d4 [ 30.562964] [ 30.563203] Last potentially related work creation: [ 30.563805] kasan_save_stack+0x22/0x50 [ 30.564308] __kasan_record_aux_stack+0x8e/0xa0 [ 30.564895] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.565534] remove_vma+0x139/0x170 [ 30.565991] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.566545] do_vmi_munmap+0x1f1/0x2b0 [ 30.567041] __vm_munmap+0x138/0x3a0 [ 30.567507] __x64_sys_munmap+0x59/0x80 [ 30.568008] do_syscall_64+0x3f/0x90 [ 30.568481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.569128] [ 30.569344] The buggy address belongs to the object at ffff88800e5ca2b8 [ 30.569344] which belongs to the cache vm_area_struct of size 168 [ 30.570824] The buggy address is located 88 bytes inside of [ 30.570824] freed 168-byte region [ffff88800e5ca2b8, ffff88800e5ca360) [ 30.572239] [ 30.572457] The buggy address belongs to the physical page: [ 30.573113] page:00000000e3804414 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5ca [ 30.574204] memcg:ffff88800e5c4601 [ 30.574628] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.575284] page_type: 0xffffffff() [ 30.575737] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.576661] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5c4601 [ 30.577584] page dumped because: kasan: bad access detected [ 30.578241] [ 30.578455] Memory state around the buggy address: [ 30.579046] ffff88800e5ca200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.579927] ffff88800e5ca280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.580794] >ffff88800e5ca300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.581644] ^ [ 30.582112] ffff88800e5ca380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.582986] ffff88800e5ca400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.583873] ================================================================== [ 30.584880] Disabling lock debugging due to kernel taint [ 32.533029] BUG: Bad rss-counter state mm:0000000020e0afaf type:MM_FILEPAGES val:33 [ 32.534026] BUG: Bad rss-counter state mm:0000000020e0afaf type:MM_ANONPAGES val:22 [ 33.096867] BUG: Bad rss-counter state mm:00000000195273aa type:MM_FILEPAGES val:33 [ 33.098039] BUG: Bad rss-counter state mm:00000000195273aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39083' (ECDSA) to the list of known hosts. 2023/06/20 16:18:14 fuzzer started 2023/06/20 16:18:15 dialing manager at localhost:36067 2023/06/20 16:18:15 checking machine... 2023/06/20 16:18:15 checking revisions... [ 33.732114] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:18:15 testing simple program... [ 33.780034] cgroup: Unknown subsys name 'net' [ 33.832116] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:18:14 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=00007f951d3ccfe0 CR3=000000001a0d0000 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=2034313a38313a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a38313a3631203032 XMM08=00007f39f002f1e00000006600000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b60 RCX=ffffffff864b3801 RDX=1ffff1100d9e1386 RSI=ffffffff81288ac5 RDI=ffff88806cf09b6c RBP=ffff88806cf09c30 RSP=ffff88806cf09a78 R8 =ffffffff864b381e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800d9f8410 RIP=ffffffff813ad547 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 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=00007f9d8d9f7618 CR3=000000001a0d0000 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=38313a3631203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303138 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000