syzkaller login: [ 42.946588] BUG: Bad rss-counter state mm:00000000a3cbb5a2 type:MM_FILEPAGES val:33 [ 42.948194] BUG: Bad rss-counter state mm:00000000a3cbb5a2 type:MM_ANONPAGES val:22 [ 43.136297] ================================================================== [ 43.137384] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.138619] Read of size 8 at addr ffff8880166a1b38 by task sshd/222 [ 43.139524] [ 43.139783] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.140825] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.141982] Call Trace: [ 43.142363] [ 43.142716] dump_stack_lvl+0x91/0xf0 [ 43.143320] print_report+0xcc/0x620 [ 43.143897] ? __virt_addr_valid+0x102/0x340 [ 43.144565] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.145295] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.146034] kasan_report+0xbe/0xf0 [ 43.146634] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.147325] vma_interval_tree_remove+0xc75/0xec0 [ 43.147929] vma_prepare+0xc54/0x11a0 [ 43.148415] __split_vma+0x5af/0x950 [ 43.148897] ? __pfx___split_vma+0x10/0x10 [ 43.149422] ? find_held_lock+0x2c/0x110 [ 43.149951] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.150519] ? lock_is_held_type+0x9f/0x120 [ 43.151061] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.151670] ? mtree_range_walk+0x632/0x900 [ 43.152222] ? mas_walk+0x5c7/0x7c0 [ 43.152706] do_vmi_munmap+0x1f1/0x2b0 [ 43.153201] mmap_region+0x1f9/0x2660 [ 43.153690] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.154201] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.154939] ? __pfx_lock_acquire+0x10/0x10 [ 43.155470] ? __pfx_mmap_region+0x10/0x10 [ 43.155999] ? security_mmap_addr+0x7d/0xa0 [ 43.156530] ? get_unmapped_area+0x1f5/0x3f0 [ 43.157082] do_mmap+0x854/0xf00 [ 43.157520] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.158018] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.158592] ksys_mmap_pgoff+0x3af/0x500 [ 43.159097] do_syscall_64+0x3f/0x90 [ 43.159571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.160217] RIP: 0033:0x7fdf6e099d82 [ 43.160673] 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 [ 43.162798] RSP: 002b:00007ffe8185b6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.163698] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf6e099d82 [ 43.164555] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf6d4d3000 [ 43.165407] RBP: 00007fdf6d4d3000 R08: 0000000000000009 R09: 0000000000001000 [ 43.166246] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b41908df70 [ 43.167104] R13: 00007ffe8185b6e0 R14: 00007ffe8185b710 R15: 00007ffe8185ba70 [ 43.167962] [ 43.168256] [ 43.168475] Allocated by task 213: [ 43.168931] kasan_save_stack+0x22/0x50 [ 43.169446] kasan_set_track+0x25/0x30 [ 43.169935] __kasan_slab_alloc+0x59/0x70 [ 43.170456] kmem_cache_alloc+0x16b/0x370 [ 43.170979] vm_area_dup+0x20/0x160 [ 43.171438] __split_vma+0x170/0x950 [ 43.171903] split_vma+0xc6/0x110 [ 43.172342] mprotect_fixup+0x8d2/0xb30 [ 43.172854] do_mprotect_pkey+0x87e/0xd40 [ 43.173385] __x64_sys_mprotect+0x78/0xc0 [ 43.173910] do_syscall_64+0x3f/0x90 [ 43.174390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.175054] [ 43.175268] Freed by task 213: [ 43.175666] kasan_save_stack+0x22/0x50 [ 43.176174] kasan_set_track+0x25/0x30 [ 43.176666] kasan_save_free_info+0x2b/0x50 [ 43.177199] __kasan_slab_free+0x10a/0x190 [ 43.177739] kmem_cache_free+0x10d/0x4d0 [ 43.178254] rcu_core+0x8c8/0x2860 [ 43.178718] __do_softirq+0x1b7/0x7d4 [ 43.179198] [ 43.179415] Last potentially related work creation: [ 43.180006] kasan_save_stack+0x22/0x50 [ 43.180506] __kasan_record_aux_stack+0x8e/0xa0 [ 43.181074] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.181712] remove_vma+0x139/0x170 [ 43.182160] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.182739] do_vmi_munmap+0x1f1/0x2b0 [ 43.183222] __vm_munmap+0x138/0x3a0 [ 43.183695] __x64_sys_munmap+0x59/0x80 [ 43.184199] do_syscall_64+0x3f/0x90 [ 43.184678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.185316] [ 43.185551] The buggy address belongs to the object at ffff8880166a1ae0 [ 43.185551] which belongs to the cache vm_area_struct of size 168 [ 43.187016] The buggy address is located 88 bytes inside of [ 43.187016] freed 168-byte region [ffff8880166a1ae0, ffff8880166a1b88) [ 43.188456] [ 43.188675] The buggy address belongs to the physical page: [ 43.189343] page:00000000bd08436a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166a1 [ 43.190466] memcg:ffff88800c4ec901 [ 43.190911] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.191625] page_type: 0xffffffff() [ 43.192087] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 43.193015] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4ec901 [ 43.193927] page dumped because: kasan: bad access detected [ 43.194603] [ 43.194816] Memory state around the buggy address: [ 43.195393] ffff8880166a1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.196250] ffff8880166a1a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 43.197106] >ffff8880166a1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.197950] ^ [ 43.198564] ffff8880166a1b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 43.199414] ffff8880166a1c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 43.200269] ================================================================== [ 43.201281] Disabling lock debugging due to kernel taint [ 45.162247] BUG: Bad rss-counter state mm:0000000058b9752d type:MM_FILEPAGES val:33 [ 45.163209] BUG: Bad rss-counter state mm:0000000058b9752d type:MM_ANONPAGES val:22 [ 45.711307] BUG: Bad rss-counter state mm:0000000037131b09 type:MM_FILEPAGES val:33 [ 45.712446] BUG: Bad rss-counter state mm:0000000037131b09 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6925' (ECDSA) to the list of known hosts. 2023/06/19 17:26:14 fuzzer started 2023/06/19 17:26:14 dialing manager at localhost:44161 2023/06/19 17:26:14 checking machine... 2023/06/19 17:26:14 checking revisions... [ 46.347500] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:26:14 testing simple program... [ 46.403168] cgroup: Unknown subsys name 'net' [ 46.453963] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:25:59 Registers: info registers vcpu 0 RAX=ffff88806ce36180 RBX=ffff888015e47318 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff8880087b6500 RSP=ffff888015847cc0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000200 R13=ffffea0000579180 R14=ffffffff818c75ae R15=ffff888014660b80 RIP=ffffffff818105ba RFL=00000046 [---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 00007f9f8693e900 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=00007fff9f100000 CR3=000000000fbc4000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f9cad02b140 CR3=000000000df28000 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=2033313a36323a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a36323a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000