syzkaller login: [ 30.979255] BUG: Bad rss-counter state mm:0000000011b64f5f type:MM_FILEPAGES val:33 [ 30.979996] BUG: Bad rss-counter state mm:0000000011b64f5f type:MM_ANONPAGES val:22 [ 31.104970] ================================================================== [ 31.105654] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.106356] Read of size 8 at addr ffff888016c1bdf0 by task sshd/221 [ 31.106918] [ 31.107094] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.107729] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.108470] Call Trace: [ 31.108842] [ 31.109192] dump_stack_lvl+0x91/0xf0 [ 31.110106] print_report+0xcc/0x620 [ 31.110677] ? __virt_addr_valid+0x102/0x340 [ 31.111096] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.111552] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.112010] kasan_report+0xbe/0xf0 [ 31.112377] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.112834] vma_interval_tree_remove+0xc75/0xec0 [ 31.113290] vma_prepare+0xc54/0x11a0 [ 31.113640] __split_vma+0x5af/0x950 [ 31.113986] ? __pfx___split_vma+0x10/0x10 [ 31.114394] ? find_held_lock+0x2c/0x110 [ 31.114778] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.115204] ? lock_is_held_type+0x9f/0x120 [ 31.115602] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.116056] ? mtree_range_walk+0x632/0x900 [ 31.116475] ? mas_walk+0x5c7/0x7c0 [ 31.116831] do_vmi_munmap+0x1f1/0x2b0 [ 31.117211] mmap_region+0x1f9/0x2660 [ 31.117577] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.117953] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.118497] ? __pfx_lock_acquire+0x10/0x10 [ 31.118830] ? __pfx_mmap_region+0x10/0x10 [ 31.119168] ? security_mmap_addr+0x7d/0xa0 [ 31.119502] ? get_unmapped_area+0x1f5/0x3f0 [ 31.119843] do_mmap+0x854/0xf00 [ 31.120128] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.120435] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.120781] ksys_mmap_pgoff+0x3af/0x500 [ 31.121103] do_syscall_64+0x3f/0x90 [ 31.121397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.121801] RIP: 0033:0x7f196a370d82 [ 31.122093] 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 [ 31.123386] RSP: 002b:00007ffef1cb6798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.123929] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f196a370d82 [ 31.124445] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19697aa000 [ 31.124954] RBP: 00007f19697aa000 R08: 0000000000000009 R09: 0000000000001000 [ 31.125476] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b0d6f2b20 [ 31.125986] R13: 00007ffef1cb67b0 R14: 00007ffef1cb67e0 R15: 00007ffef1cb6b40 [ 31.126523] [ 31.126703] [ 31.126838] Allocated by task 214: [ 31.127112] kasan_save_stack+0x22/0x50 [ 31.127423] kasan_set_track+0x25/0x30 [ 31.127730] __kasan_slab_alloc+0x59/0x70 [ 31.128063] kmem_cache_alloc+0x16b/0x370 [ 31.128385] vm_area_dup+0x20/0x160 [ 31.128668] __split_vma+0x170/0x950 [ 31.128955] split_vma+0xc6/0x110 [ 31.129236] mprotect_fixup+0x8d2/0xb30 [ 31.129548] do_mprotect_pkey+0x87e/0xd40 [ 31.129871] __x64_sys_mprotect+0x78/0xc0 [ 31.130212] do_syscall_64+0x3f/0x90 [ 31.130503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.130897] [ 31.131030] Freed by task 204: [ 31.131283] kasan_save_stack+0x22/0x50 [ 31.131594] kasan_set_track+0x25/0x30 [ 31.131896] kasan_save_free_info+0x2b/0x50 [ 31.132228] __kasan_slab_free+0x10a/0x190 [ 31.132553] kmem_cache_free+0x10d/0x4d0 [ 31.132863] rcu_core+0x8c8/0x2860 [ 31.133144] __do_softirq+0x1b7/0x7d4 [ 31.133437] [ 31.133569] Last potentially related work creation: [ 31.133928] kasan_save_stack+0x22/0x50 [ 31.134257] __kasan_record_aux_stack+0x8e/0xa0 [ 31.134606] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.135002] remove_vma+0x139/0x170 [ 31.135288] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.135622] do_vmi_munmap+0x1f1/0x2b0 [ 31.135914] __vm_munmap+0x138/0x3a0 [ 31.136207] __x64_sys_munmap+0x59/0x80 [ 31.136512] do_syscall_64+0x3f/0x90 [ 31.136805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137212] [ 31.137345] The buggy address belongs to the object at ffff888016c1bd98 [ 31.137345] which belongs to the cache vm_area_struct of size 168 [ 31.138269] The buggy address is located 88 bytes inside of [ 31.138269] freed 168-byte region [ffff888016c1bd98, ffff888016c1be40) [ 31.139151] [ 31.139287] The buggy address belongs to the physical page: [ 31.139695] page:000000003675c795 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c1b [ 31.140369] memcg:ffff888010267501 [ 31.140637] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.141044] page_type: 0xffffffff() [ 31.141331] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.141894] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010267501 [ 31.142465] page dumped because: kasan: bad access detected [ 31.142871] [ 31.143003] Memory state around the buggy address: [ 31.143367] ffff888016c1bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.143886] ffff888016c1bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.144416] >ffff888016c1bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.144934] ^ [ 31.145436] ffff888016c1be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.145959] ffff888016c1be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.146484] ================================================================== [ 31.147065] Disabling lock debugging due to kernel taint [ 32.761076] BUG: Bad rss-counter state mm:00000000b39c15a9 type:MM_FILEPAGES val:33 [ 32.762550] BUG: Bad rss-counter state mm:00000000b39c15a9 type:MM_ANONPAGES val:22 [ 33.196068] BUG: Bad rss-counter state mm:00000000f32905a8 type:MM_FILEPAGES val:33 [ 33.196993] BUG: Bad rss-counter state mm:00000000f32905a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36576' (ECDSA) to the list of known hosts. 2023/06/21 00:25:42 fuzzer started 2023/06/21 00:25:43 dialing manager at localhost:36067 2023/06/21 00:25:43 checking machine... 2023/06/21 00:25:43 checking revisions... [ 33.985463] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:25:43 testing simple program... [ 34.041527] cgroup: Unknown subsys name 'net' [ 34.079285] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:25:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff888016d53680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88801029f910 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000000cc0 RIP=ffffffff814c0408 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 00007fc0b350e900 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=00007ffdc690c000 CR3=000000000f724000 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=00007f7ff4790ff0 CR3=000000000d69a000 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=36f77ca21cba01bbf44212613a19a58d XMM02=000000000011a450eff9b2d0a8fce9cb XMM03=000000000011a5202c67c8bc2e329bc3 XMM04=45cfc4b26dedda2700000000000ae988 XMM05=e4cb8bb95a7664b60000000000131740 XMM06=1da9b58eff2d4a7200000000001305a8 XMM07=e042d86d42eb936e0000000000121be0 XMM08=181fef1cb91882d7000000000011a520 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000