syzkaller login: [ 38.674230] BUG: Bad rss-counter state mm:00000000b34c216e type:MM_FILEPAGES val:33 [ 38.675451] BUG: Bad rss-counter state mm:00000000b34c216e type:MM_ANONPAGES val:22 [ 38.827966] ================================================================== [ 38.829048] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.830165] Read of size 8 at addr ffff88800ed9c310 by task sshd/221 [ 38.831249] [ 38.831467] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.832356] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.833395] Call Trace: [ 38.833721] <TASK> [ 38.834010] dump_stack_lvl+0x91/0xf0 [ 38.834511] print_report+0xcc/0x620 [ 38.835017] ? __virt_addr_valid+0x102/0x340 [ 38.835576] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.836205] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.836833] kasan_report+0xbe/0xf0 [ 38.837323] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.837948] vma_interval_tree_remove+0xc75/0xec0 [ 38.838555] vma_prepare+0xc54/0x11a0 [ 38.839047] __split_vma+0x5af/0x950 [ 38.839526] ? __pfx___split_vma+0x10/0x10 [ 38.840063] ? find_held_lock+0x2c/0x110 [ 38.840595] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.841166] ? lock_is_held_type+0x9f/0x120 [ 38.841709] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.842321] ? mtree_range_walk+0x632/0x900 [ 38.842908] ? mas_walk+0x5c7/0x7c0 [ 38.843392] do_vmi_munmap+0x1f1/0x2b0 [ 38.843887] mmap_region+0x1f9/0x2660 [ 38.844374] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.844891] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.845613] ? __pfx_lock_acquire+0x10/0x10 [ 38.846149] ? __pfx_mmap_region+0x10/0x10 [ 38.846688] ? security_mmap_addr+0x7d/0xa0 [ 38.847232] ? get_unmapped_area+0x1f5/0x3f0 [ 38.847793] do_mmap+0x854/0xf00 [ 38.848252] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.848749] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.849315] ksys_mmap_pgoff+0x3af/0x500 [ 38.849833] do_syscall_64+0x3f/0x90 [ 38.850322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.850989] RIP: 0033:0x7f6ad3964d82 [ 38.851448] 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 [ 38.853600] RSP: 002b:00007ffd43ea8238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.854518] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ad3964d82 [ 38.855413] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ad2d9e000 [ 38.856266] RBP: 00007f6ad2d9e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.857127] R10: 0000000000000812 R11: 0000000000000206 R12: 000055810e5cbb20 [ 38.857973] R13: 00007ffd43ea8250 R14: 00007ffd43ea8280 R15: 00007ffd43ea85e0 [ 38.858838] </TASK> [ 38.859145] [ 38.859364] Allocated by task 214: [ 38.859795] kasan_save_stack+0x22/0x50 [ 38.860304] kasan_set_track+0x25/0x30 [ 38.860796] __kasan_slab_alloc+0x59/0x70 [ 38.861331] kmem_cache_alloc+0x16b/0x370 [ 38.861856] vm_area_dup+0x20/0x160 [ 38.862309] __split_vma+0x170/0x950 [ 38.862776] split_vma+0xc6/0x110 [ 38.863228] mprotect_fixup+0x8d2/0xb30 [ 38.863731] do_mprotect_pkey+0x87e/0xd40 [ 38.864254] __x64_sys_mprotect+0x78/0xc0 [ 38.864779] do_syscall_64+0x3f/0x90 [ 38.865262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.865901] [ 38.866120] Freed by task 214: [ 38.866513] kasan_save_stack+0x22/0x50 [ 38.867037] kasan_set_track+0x25/0x30 [ 38.867532] kasan_save_free_info+0x2b/0x50 [ 38.868068] __kasan_slab_free+0x10a/0x190 [ 38.868604] kmem_cache_free+0x10d/0x4d0 [ 38.869122] rcu_core+0x8c8/0x2860 [ 38.869570] __do_softirq+0x1b7/0x7d4 [ 38.870051] [ 38.870272] Last potentially related work creation: [ 38.870857] kasan_save_stack+0x22/0x50 [ 38.871447] __kasan_record_aux_stack+0x8e/0xa0 [ 38.872034] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.872677] remove_vma+0x139/0x170 [ 38.873136] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.873700] do_vmi_munmap+0x1f1/0x2b0 [ 38.874189] __vm_munmap+0x138/0x3a0 [ 38.874662] __x64_sys_munmap+0x59/0x80 [ 38.875195] do_syscall_64+0x3f/0x90 [ 38.875674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.876328] [ 38.876544] The buggy address belongs to the object at ffff88800ed9c2b8 [ 38.876544] which belongs to the cache vm_area_struct of size 168 [ 38.878030] The buggy address is located 88 bytes inside of [ 38.878030] freed 168-byte region [ffff88800ed9c2b8, ffff88800ed9c360) [ 38.879447] [ 38.879667] The buggy address belongs to the physical page: [ 38.880333] page:000000002d5cf77a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed9c [ 38.881420] memcg:ffff88800d0aef01 [ 38.881860] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.882511] page_type: 0xffffffff() [ 38.882982] raw: 0100000000000200 ffff8880087a0c80 ffffea0000381200 dead000000000006 [ 38.883908] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0aef01 [ 38.884814] page dumped because: kasan: bad access detected [ 38.885488] [ 38.885709] Memory state around the buggy address: [ 38.886292] ffff88800ed9c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.887167] ffff88800ed9c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.888036] >ffff88800ed9c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.888896] ^ [ 38.889364] ffff88800ed9c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.890232] ffff88800ed9c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.891109] ================================================================== [ 38.892064] Disabling lock debugging due to kernel taint [ 41.334658] BUG: Bad rss-counter state mm:00000000cb5aa64a type:MM_FILEPAGES val:33 [ 41.335687] BUG: Bad rss-counter state mm:00000000cb5aa64a type:MM_ANONPAGES val:22 [ 41.830156] BUG: Bad rss-counter state mm:00000000bf9b4ec8 type:MM_FILEPAGES val:33 [ 41.831181] BUG: Bad rss-counter state mm:00000000bf9b4ec8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29934' (ECDSA) to the list of known hosts. 2023/06/20 16:46:29 fuzzer started 2023/06/20 16:46:29 dialing manager at localhost:36067 2023/06/20 16:46:29 checking machine... 2023/06/20 16:46:29 checking revisions... [ 42.585234] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:46:29 testing simple program... [ 42.650303] cgroup: Unknown subsys name 'net' [ 42.710236] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:46:29 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff85dbd7fc RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88806ce099b8 R8 =ffffffff860d8256 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd800 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc8c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f81ab4e6900 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=00007f81aa9206b0 CR3=000000000b390000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b4ba42ef53468fba00000000000ae988 XMM05=993df4330d6440560000000000132ac8 XMM06=e4cb8bb95a7664b600000000001315f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffddfdc0dc8 CR3=000000001022a000 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=2039323a36343a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a36343a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000