syzkaller login: [ 59.932700] BUG: Bad rss-counter state mm:00000000d663e892 type:MM_FILEPAGES val:33 [ 59.933993] BUG: Bad rss-counter state mm:00000000d663e892 type:MM_ANONPAGES val:22 [ 60.091423] ================================================================== [ 60.092344] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.093283] Read of size 8 at addr ffff88800eaf8798 by task sshd/219 [ 60.094089] [ 60.094313] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.095353] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.096336] Call Trace: [ 60.096660] [ 60.096943] dump_stack_lvl+0x91/0xf0 [ 60.097452] print_report+0xcc/0x620 [ 60.097938] ? __virt_addr_valid+0x102/0x340 [ 60.098487] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.099102] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.099712] kasan_report+0xbe/0xf0 [ 60.100189] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.100813] vma_interval_tree_remove+0xc75/0xec0 [ 60.101428] vma_prepare+0xc54/0x11a0 [ 60.101916] __split_vma+0x5af/0x950 [ 60.102399] ? __pfx___split_vma+0x10/0x10 [ 60.102931] ? find_held_lock+0x2c/0x110 [ 60.103455] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.104016] ? lock_is_held_type+0x9f/0x120 [ 60.104553] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.105162] ? mtree_range_walk+0x632/0x900 [ 60.105739] ? mas_walk+0x5c7/0x7c0 [ 60.106215] do_vmi_munmap+0x1f1/0x2b0 [ 60.106717] mmap_region+0x1f9/0x2660 [ 60.107200] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.107724] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.108440] ? __pfx_lock_acquire+0x10/0x10 [ 60.108972] ? __pfx_mmap_region+0x10/0x10 [ 60.109520] ? security_mmap_addr+0x7d/0xa0 [ 60.110052] ? get_unmapped_area+0x1f5/0x3f0 [ 60.110605] do_mmap+0x854/0xf00 [ 60.111047] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.111548] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.112113] ksys_mmap_pgoff+0x3af/0x500 [ 60.112624] do_syscall_64+0x3f/0x90 [ 60.113102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.113759] RIP: 0033:0x7fd76ce6ed82 [ 60.114215] 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 [ 60.116346] RSP: 002b:00007ffdf6d88fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.117256] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd76ce6ed82 [ 60.118146] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd76c2a8000 [ 60.118997] RBP: 00007fd76c2a8000 R08: 0000000000000009 R09: 0000000000001000 [ 60.119847] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647225fcf60 [ 60.120703] R13: 00007ffdf6d88fe0 R14: 00007ffdf6d89010 R15: 00007ffdf6d89370 [ 60.121567] [ 60.121861] [ 60.122076] Allocated by task 212: [ 60.122509] kasan_save_stack+0x22/0x50 [ 60.123016] kasan_set_track+0x25/0x30 [ 60.123509] __kasan_slab_alloc+0x59/0x70 [ 60.124035] kmem_cache_alloc+0x16b/0x370 [ 60.124552] vm_area_dup+0x20/0x160 [ 60.125001] __split_vma+0x170/0x950 [ 60.125476] split_vma+0xc6/0x110 [ 60.125912] mprotect_fixup+0x8d2/0xb30 [ 60.126416] do_mprotect_pkey+0x87e/0xd40 [ 60.126937] __x64_sys_mprotect+0x78/0xc0 [ 60.127463] do_syscall_64+0x3f/0x90 [ 60.127937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.128585] [ 60.128800] Freed by task 212: [ 60.129197] kasan_save_stack+0x22/0x50 [ 60.129718] kasan_set_track+0x25/0x30 [ 60.130211] kasan_save_free_info+0x2b/0x50 [ 60.130758] __kasan_slab_free+0x10a/0x190 [ 60.131296] kmem_cache_free+0x10d/0x4d0 [ 60.131800] rcu_core+0x8c8/0x2860 [ 60.132260] __do_softirq+0x1b7/0x7d4 [ 60.132738] [ 60.132957] Last potentially related work creation: [ 60.133555] kasan_save_stack+0x22/0x50 [ 60.134079] __kasan_record_aux_stack+0x8e/0xa0 [ 60.134676] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.135329] remove_vma+0x139/0x170 [ 60.135850] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.136418] do_vmi_munmap+0x1f1/0x2b0 [ 60.136904] __vm_munmap+0x138/0x3a0 [ 60.137396] __x64_sys_munmap+0x59/0x80 [ 60.137903] do_syscall_64+0x3f/0x90 [ 60.138395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.139051] [ 60.139269] The buggy address belongs to the object at ffff88800eaf8740 [ 60.139269] which belongs to the cache vm_area_struct of size 168 [ 60.140742] The buggy address is located 88 bytes inside of [ 60.140742] freed 168-byte region [ffff88800eaf8740, ffff88800eaf87e8) [ 60.142162] [ 60.142381] The buggy address belongs to the physical page: [ 60.143036] page:00000000d641c0df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeaf8 [ 60.144113] memcg:ffff88800fdd0a01 [ 60.144544] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.145183] page_type: 0xffffffff() [ 60.145652] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.146581] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdd0a01 [ 60.147502] page dumped because: kasan: bad access detected [ 60.148163] [ 60.148381] Memory state around the buggy address: [ 60.148963] ffff88800eaf8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.149839] ffff88800eaf8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 60.150694] >ffff88800eaf8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 60.151546] ^ [ 60.152048] ffff88800eaf8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 60.152898] ffff88800eaf8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 60.153759] ================================================================== [ 60.154707] Disabling lock debugging due to kernel taint [ 62.298765] BUG: Bad rss-counter state mm:0000000064fbd55e type:MM_FILEPAGES val:33 [ 62.299903] BUG: Bad rss-counter state mm:0000000064fbd55e type:MM_ANONPAGES val:22 [ 62.794346] BUG: Bad rss-counter state mm:00000000bda67439 type:MM_FILEPAGES val:33 [ 62.795401] BUG: Bad rss-counter state mm:00000000bda67439 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57583' (ECDSA) to the list of known hosts. 2023/06/21 00:28:05 fuzzer started 2023/06/21 00:28:05 dialing manager at localhost:36067 2023/06/21 00:28:05 checking machine... 2023/06/21 00:28:05 checking revisions... [ 63.446295] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:28:05 testing simple program... [ 63.499585] cgroup: Unknown subsys name 'net' [ 63.563721] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:28:05 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff86139701 RDX=ffff88806ce09e10 RSI=0000000000000000 RDI=ffff88806ce09aa8 RBP=ffff88806ce02000 RSP=ffff88806ce09a68 R8 =ffffffff86139748 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09e08 R15=ffff88806ce09a98 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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 00007f83c8e01900 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=00007f83c93b90b0 CR3=000000001a76a000 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=2035303a38323a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a38323a3030203132 XMM08=3d656e696c646d632022656369767265 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=00007f70c249af60 CR3=000000000c638000 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=ac5a11c842c79290c74dbb7a904abc6e XMM02=000000000011abe0ec2efd57dc4c00df XMM03=0000000000121a30669ef1b4962325d4 XMM04=26b5b078c76673e600000000000ae988 XMM05=f3c4c812f530f38b0000000000132060 XMM06=806171799158d96700000000001316e8 XMM07=e042d86d42eb936e0000000000121d08 XMM08=669ef1b4962325d4000000000011ac40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000