syzkaller login: [ 31.530044] BUG: Bad rss-counter state mm:00000000e774ae46 type:MM_FILEPAGES val:33 [ 31.531128] BUG: Bad rss-counter state mm:00000000e774ae46 type:MM_ANONPAGES val:22 [ 31.702677] ================================================================== [ 31.703692] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.704648] Read of size 8 at addr ffff88801a1b7d08 by task sshd/221 [ 31.705519] [ 31.705739] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.706610] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.707619] Call Trace: [ 31.707946] [ 31.708237] dump_stack_lvl+0x91/0xf0 [ 31.708730] print_report+0xcc/0x620 [ 31.709241] ? __virt_addr_valid+0x102/0x340 [ 31.709806] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.710433] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.711083] kasan_report+0xbe/0xf0 [ 31.711576] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.712223] vma_interval_tree_remove+0xc75/0xec0 [ 31.712834] vma_prepare+0xc54/0x11a0 [ 31.713333] __split_vma+0x5af/0x950 [ 31.713815] ? __pfx___split_vma+0x10/0x10 [ 31.714353] ? find_held_lock+0x2c/0x110 [ 31.714886] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.715467] ? lock_is_held_type+0x9f/0x120 [ 31.716010] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.716627] ? mtree_range_walk+0x632/0x900 [ 31.717192] ? mas_walk+0x5c7/0x7c0 [ 31.717679] do_vmi_munmap+0x1f1/0x2b0 [ 31.718179] mmap_region+0x1f9/0x2660 [ 31.718663] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.719192] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.719914] ? __pfx_lock_acquire+0x10/0x10 [ 31.720457] ? __pfx_mmap_region+0x10/0x10 [ 31.720991] ? security_mmap_addr+0x7d/0xa0 [ 31.721521] ? get_unmapped_area+0x1f5/0x3f0 [ 31.722073] do_mmap+0x854/0xf00 [ 31.722514] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.723029] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.723591] ksys_mmap_pgoff+0x3af/0x500 [ 31.724103] do_syscall_64+0x3f/0x90 [ 31.724583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.725236] RIP: 0033:0x7fad5d0fad82 [ 31.725694] 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 [ 31.727842] RSP: 002b:00007fff87365ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.728746] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad5d0fad82 [ 31.729606] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad5c534000 [ 31.730452] RBP: 00007fad5c534000 R08: 0000000000000009 R09: 0000000000001000 [ 31.731313] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557242098f70 [ 31.732161] R13: 00007fff87365cc0 R14: 00007fff87365cf0 R15: 00007fff87366050 [ 31.733019] [ 31.733314] [ 31.733532] Allocated by task 214: [ 31.733957] kasan_save_stack+0x22/0x50 [ 31.734470] kasan_set_track+0x25/0x30 [ 31.734989] __kasan_slab_alloc+0x59/0x70 [ 31.735527] kmem_cache_alloc+0x16b/0x370 [ 31.736051] vm_area_dup+0x20/0x160 [ 31.736512] __split_vma+0x170/0x950 [ 31.736979] split_vma+0xc6/0x110 [ 31.737419] mprotect_fixup+0x8d2/0xb30 [ 31.737936] do_mprotect_pkey+0x87e/0xd40 [ 31.738459] __x64_sys_mprotect+0x78/0xc0 [ 31.738989] do_syscall_64+0x3f/0x90 [ 31.739463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.740116] [ 31.740330] Freed by task 214: [ 31.740722] kasan_save_stack+0x22/0x50 [ 31.741230] kasan_set_track+0x25/0x30 [ 31.741749] kasan_save_free_info+0x2b/0x50 [ 31.742294] __kasan_slab_free+0x10a/0x190 [ 31.742843] kmem_cache_free+0x10d/0x4d0 [ 31.743351] rcu_core+0x8c8/0x2860 [ 31.743799] __do_softirq+0x1b7/0x7d4 [ 31.744287] [ 31.744505] Last potentially related work creation: [ 31.745094] kasan_save_stack+0x22/0x50 [ 31.745606] __kasan_record_aux_stack+0x8e/0xa0 [ 31.746193] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.746852] remove_vma+0x139/0x170 [ 31.747311] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.747872] do_vmi_munmap+0x1f1/0x2b0 [ 31.748360] __vm_munmap+0x138/0x3a0 [ 31.748834] __x64_sys_munmap+0x59/0x80 [ 31.749342] do_syscall_64+0x3f/0x90 [ 31.749826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.750473] [ 31.750688] The buggy address belongs to the object at ffff88801a1b7cb0 [ 31.750688] which belongs to the cache vm_area_struct of size 168 [ 31.752214] The buggy address is located 88 bytes inside of [ 31.752214] freed 168-byte region [ffff88801a1b7cb0, ffff88801a1b7d58) [ 31.753663] [ 31.753877] The buggy address belongs to the physical page: [ 31.754541] page:0000000074a4c9c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1b7 [ 31.755655] memcg:ffff888016ba7401 [ 31.756086] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.756733] page_type: 0xffffffff() [ 31.757187] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.758101] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ba7401 [ 31.759013] page dumped because: kasan: bad access detected [ 31.759685] [ 31.759903] Memory state around the buggy address: [ 31.760491] ffff88801a1b7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.761350] ffff88801a1b7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.762213] >ffff88801a1b7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.763102] ^ [ 31.763546] ffff88801a1b7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.764401] ffff88801a1b7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.765249] ================================================================== [ 31.766238] Disabling lock debugging due to kernel taint [ 33.395126] BUG: Bad rss-counter state mm:0000000003076680 type:MM_FILEPAGES val:33 [ 33.395875] BUG: Bad rss-counter state mm:0000000003076680 type:MM_ANONPAGES val:22 [ 33.890309] BUG: Bad rss-counter state mm:0000000058fc5231 type:MM_FILEPAGES val:33 [ 33.891503] BUG: Bad rss-counter state mm:0000000058fc5231 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19557' (ECDSA) to the list of known hosts. 2023/06/19 22:55:50 fuzzer started 2023/06/19 22:55:50 dialing manager at localhost:44161 2023/06/19 22:55:50 checking machine... 2023/06/19 22:55:50 checking revisions... [ 34.458351] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:55:51 testing simple program... [ 34.499793] cgroup: Unknown subsys name 'net' [ 34.532923] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:55:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fe0963684f0 CR3=0000000018e2c000 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=35353a3232203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303633 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888019c11b40 RSI=ffffffff844c0884 RDI=ffff88800f6a7d48 RBP=ffff88800f6a7ca8 RSP=ffff88800f6a7aa8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=dffffc0000000000 R13=ffffed1001ed4f9c R14=ffff88800f6a7ce1 R15=dffffc0000000000 RIP=ffffffff8450bdca 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 00007f4c53c65900 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=00007f4c53c2a008 CR3=000000000f9ca000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000