syzkaller login: [ 32.157823] BUG: Bad rss-counter state mm:00000000e21594ce type:MM_FILEPAGES val:33 [ 32.159087] BUG: Bad rss-counter state mm:00000000e21594ce type:MM_ANONPAGES val:22 [ 32.200731] ================================================================== [ 32.201782] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.202786] Read of size 8 at addr ffff88800fdd76b0 by task sshd/221 [ 32.203595] [ 32.203825] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.204726] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.205751] Call Trace: [ 32.206107] [ 32.206411] dump_stack_lvl+0x91/0xf0 [ 32.206931] print_report+0xcc/0x620 [ 32.207445] ? __virt_addr_valid+0x102/0x340 [ 32.208027] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.208692] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.209337] kasan_report+0xbe/0xf0 [ 32.209838] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.210517] vma_interval_tree_remove+0xc75/0xec0 [ 32.211158] vma_prepare+0xc54/0x11a0 [ 32.211671] __split_vma+0x5af/0x950 [ 32.212161] ? __pfx___split_vma+0x10/0x10 [ 32.212712] ? find_held_lock+0x2c/0x110 [ 32.213261] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.213856] ? lock_is_held_type+0x9f/0x120 [ 32.214426] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.215069] ? mtree_range_walk+0x632/0x900 [ 32.215650] ? mas_walk+0x5c7/0x7c0 [ 32.216148] do_vmi_munmap+0x1f1/0x2b0 [ 32.216683] mmap_region+0x1f9/0x2660 [ 32.217203] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.217765] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.218560] ? __pfx_lock_acquire+0x10/0x10 [ 32.219145] ? __pfx_mmap_region+0x10/0x10 [ 32.219721] ? security_mmap_addr+0x7d/0xa0 [ 32.220305] ? get_unmapped_area+0x1f5/0x3f0 [ 32.220903] do_mmap+0x854/0xf00 [ 32.221388] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.221924] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.222544] ksys_mmap_pgoff+0x3af/0x500 [ 32.223096] do_syscall_64+0x3f/0x90 [ 32.223625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.224328] RIP: 0033:0x7fdc7a223d82 [ 32.224824] 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 [ 32.227143] RSP: 002b:00007ffc2b8a2a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.228119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc7a223d82 [ 32.229015] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc7965d000 [ 32.229907] RBP: 00007fdc7965d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.230819] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557146254ec0 [ 32.231729] R13: 00007ffc2b8a2a50 R14: 00007ffc2b8a2a80 R15: 00007ffc2b8a2de0 [ 32.232634] [ 32.232947] [ 32.233181] Allocated by task 214: [ 32.233640] kasan_save_stack+0x22/0x50 [ 32.234178] kasan_set_track+0x25/0x30 [ 32.234708] __kasan_slab_alloc+0x59/0x70 [ 32.235266] kmem_cache_alloc+0x16b/0x370 [ 32.235811] vm_area_dup+0x20/0x160 [ 32.236299] __split_vma+0x170/0x950 [ 32.236794] split_vma+0xc6/0x110 [ 32.237265] mprotect_fixup+0x8d2/0xb30 [ 32.237801] do_mprotect_pkey+0x87e/0xd40 [ 32.238368] __x64_sys_mprotect+0x78/0xc0 [ 32.238930] do_syscall_64+0x3f/0x90 [ 32.239432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.240113] [ 32.240341] Freed by task 214: [ 32.240756] kasan_save_stack+0x22/0x50 [ 32.241293] kasan_set_track+0x25/0x30 [ 32.241821] kasan_save_free_info+0x2b/0x50 [ 32.242397] __kasan_slab_free+0x10a/0x190 [ 32.242967] kmem_cache_free+0x10d/0x4d0 [ 32.243512] rcu_core+0x8c8/0x2860 [ 32.243993] __do_softirq+0x1b7/0x7d4 [ 32.244503] [ 32.244732] Last potentially related work creation: [ 32.245351] kasan_save_stack+0x22/0x50 [ 32.245891] __kasan_record_aux_stack+0x8e/0xa0 [ 32.246521] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.247205] remove_vma+0x139/0x170 [ 32.247684] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.248277] do_vmi_munmap+0x1f1/0x2b0 [ 32.248802] __vm_munmap+0x138/0x3a0 [ 32.249302] __x64_sys_munmap+0x59/0x80 [ 32.249828] do_syscall_64+0x3f/0x90 [ 32.250339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.251019] [ 32.251249] The buggy address belongs to the object at ffff88800fdd7658 [ 32.251249] which belongs to the cache vm_area_struct of size 168 [ 32.252811] The buggy address is located 88 bytes inside of [ 32.252811] freed 168-byte region [ffff88800fdd7658, ffff88800fdd7700) [ 32.254306] [ 32.254538] The buggy address belongs to the physical page: [ 32.255242] page:000000006221cb1e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdd7 [ 32.256402] memcg:ffff888016346301 [ 32.256854] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.257539] page_type: 0xffffffff() [ 32.258025] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.259021] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016346301 [ 32.260044] page dumped because: kasan: bad access detected [ 32.260743] [ 32.260968] Memory state around the buggy address: [ 32.261583] ffff88800fdd7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.262488] ffff88800fdd7600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.263388] >ffff88800fdd7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.264292] ^ [ 32.264902] ffff88800fdd7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.265805] ffff88800fdd7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.266714] ================================================================== [ 32.267892] Disabling lock debugging due to kernel taint [ 34.133369] BUG: Bad rss-counter state mm:00000000e216bf02 type:MM_FILEPAGES val:33 [ 34.134926] BUG: Bad rss-counter state mm:00000000e216bf02 type:MM_ANONPAGES val:22 [ 34.647976] BUG: Bad rss-counter state mm:00000000e8f82189 type:MM_FILEPAGES val:33 [ 34.649280] BUG: Bad rss-counter state mm:00000000e8f82189 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51531' (ECDSA) to the list of known hosts. 2023/06/20 07:50:30 fuzzer started 2023/06/20 07:50:30 dialing manager at localhost:44161 2023/06/20 07:50:30 checking machine... 2023/06/20 07:50:30 checking revisions... [ 35.393146] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:50:30 testing simple program... [ 35.439075] cgroup: Unknown subsys name 'net' [ 35.493008] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:50:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801668eca8 RCX=ffff88801668eca8 RDX=0000000080120003 RSI=ffff88801668eca8 RDI=ffff88800879fdc0 RBP=ffff888019bbf908 RSP=ffff888019bbf870 R8 =0000000080120002 R9 =0000000000000000 R10=ffffea000059a380 R11=000000008011000e R12=ffffea000059a380 R13=ffff88801668ebd0 R14=0000000080120002 R15=ffff88800879fdc0 RIP=ffffffff818094f2 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 00007fd08df7e700 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=00007f3e35f72240 CR3=00000000180f4000 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=2030333a30353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a30353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001fd6ec0 RSI=ffffffff81805d87 RDI=ffff88800feb7670 RBP=ffff88800feb7640 RSP=ffff88800feb7598 R8 =0000000000000001 R9 =ffff88800feb75e8 R10=0000000000038001 R11=0000000000020a4e R12=ffff88800feb7670 R13=0000000000000000 R14=ffff8880160f0000 R15=0000000080120009 RIP=ffffffff813ad42f RFL=00000286 [--S--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 00007fc9b2e35900 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=00007ffd00dc3000 CR3=000000000e900000 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=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