syzkaller login: [ 39.174918] BUG: Bad rss-counter state mm:00000000dec8bf51 type:MM_FILEPAGES val:33 [ 39.176165] BUG: Bad rss-counter state mm:00000000dec8bf51 type:MM_ANONPAGES val:22 [ 39.212342] ================================================================== [ 39.213377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.214406] Read of size 8 at addr ffff88800cc745c8 by task sshd/221 [ 39.215175] [ 39.215390] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.216276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.217321] Call Trace: [ 39.217654] [ 39.217947] dump_stack_lvl+0x91/0xf0 [ 39.218436] print_report+0xcc/0x620 [ 39.218928] ? __virt_addr_valid+0x102/0x340 [ 39.219481] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.220106] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.220721] kasan_report+0xbe/0xf0 [ 39.221212] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.221847] vma_interval_tree_remove+0xc75/0xec0 [ 39.222461] vma_prepare+0xc54/0x11a0 [ 39.222939] __split_vma+0x5af/0x950 [ 39.223414] ? __pfx___split_vma+0x10/0x10 [ 39.223949] ? find_held_lock+0x2c/0x110 [ 39.224476] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.225068] ? lock_is_held_type+0x9f/0x120 [ 39.225615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.226225] ? mtree_range_walk+0x632/0x900 [ 39.226781] ? mas_walk+0x5c7/0x7c0 [ 39.227264] do_vmi_munmap+0x1f1/0x2b0 [ 39.227765] mmap_region+0x1f9/0x2660 [ 39.228252] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.228772] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.229502] ? __pfx_lock_acquire+0x10/0x10 [ 39.230037] ? __pfx_mmap_region+0x10/0x10 [ 39.230566] ? security_mmap_addr+0x7d/0xa0 [ 39.231103] ? get_unmapped_area+0x1f5/0x3f0 [ 39.231663] do_mmap+0x854/0xf00 [ 39.232117] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.232619] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.233217] ksys_mmap_pgoff+0x3af/0x500 [ 39.233731] do_syscall_64+0x3f/0x90 [ 39.234223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.234874] RIP: 0033:0x7f70286aed82 [ 39.235328] 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 [ 39.237470] RSP: 002b:00007ffc87baa748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.238373] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f70286aed82 [ 39.239223] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7027ae8000 [ 39.240072] RBP: 00007f7027ae8000 R08: 0000000000000009 R09: 0000000000001000 [ 39.240945] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a848a7980 [ 39.241799] R13: 00007ffc87baa760 R14: 00007ffc87baa790 R15: 00007ffc87baaaf0 [ 39.242660] [ 39.242951] [ 39.243164] Allocated by task 214: [ 39.243594] kasan_save_stack+0x22/0x50 [ 39.244098] kasan_set_track+0x25/0x30 [ 39.244592] __kasan_slab_alloc+0x59/0x70 [ 39.245126] kmem_cache_alloc+0x16b/0x370 [ 39.245663] vm_area_dup+0x20/0x160 [ 39.246111] __split_vma+0x170/0x950 [ 39.246587] split_vma+0xc6/0x110 [ 39.247021] mprotect_fixup+0x8d2/0xb30 [ 39.247525] do_mprotect_pkey+0x87e/0xd40 [ 39.248046] __x64_sys_mprotect+0x78/0xc0 [ 39.248577] do_syscall_64+0x3f/0x90 [ 39.249066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.249703] [ 39.249922] Freed by task 214: [ 39.250309] kasan_save_stack+0x22/0x50 [ 39.250810] kasan_set_track+0x25/0x30 [ 39.251309] kasan_save_free_info+0x2b/0x50 [ 39.251848] __kasan_slab_free+0x10a/0x190 [ 39.252392] kmem_cache_free+0x10d/0x4d0 [ 39.252903] rcu_core+0x8c8/0x2860 [ 39.253371] __do_softirq+0x1b7/0x7d4 [ 39.253853] [ 39.254072] Last potentially related work creation: [ 39.254661] kasan_save_stack+0x22/0x50 [ 39.255173] __kasan_record_aux_stack+0x8e/0xa0 [ 39.255752] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.256397] remove_vma+0x139/0x170 [ 39.256851] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.257420] do_vmi_munmap+0x1f1/0x2b0 [ 39.257903] __vm_munmap+0x138/0x3a0 [ 39.258384] __x64_sys_munmap+0x59/0x80 [ 39.258890] do_syscall_64+0x3f/0x90 [ 39.259368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.260017] [ 39.260235] Second to last potentially related work creation: [ 39.260937] kasan_save_stack+0x22/0x50 [ 39.261442] __kasan_record_aux_stack+0x8e/0xa0 [ 39.262016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.262683] remove_vma+0x139/0x170 [ 39.263150] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.263729] do_vmi_munmap+0x1f1/0x2b0 [ 39.264222] mmap_region+0x1f9/0x2660 [ 39.264709] do_mmap+0x854/0xf00 [ 39.265328] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.265938] ksys_mmap_pgoff+0x7d/0x500 [ 39.266528] do_syscall_64+0x3f/0x90 [ 39.267098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.267862] [ 39.268120] The buggy address belongs to the object at ffff88800cc74570 [ 39.268120] which belongs to the cache vm_area_struct of size 168 [ 39.269879] The buggy address is located 88 bytes inside of [ 39.269879] freed 168-byte region [ffff88800cc74570, ffff88800cc74618) [ 39.271289] [ 39.271516] The buggy address belongs to the physical page: [ 39.272178] page:00000000ab45019d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc74 [ 39.273253] memcg:ffff88800de35601 [ 39.273683] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.274380] page_type: 0xffffffff() [ 39.274829] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 39.275745] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de35601 [ 39.276646] page dumped because: kasan: bad access detected [ 39.277305] [ 39.277522] Memory state around the buggy address: [ 39.278096] ffff88800cc74480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.278939] ffff88800cc74500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 39.279785] >ffff88800cc74580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.280624] ^ [ 39.281301] ffff88800cc74600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.282152] ffff88800cc74680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.283001] ================================================================== [ 39.284149] Disabling lock debugging due to kernel taint [ 41.318046] BUG: Bad rss-counter state mm:00000000c539535c type:MM_FILEPAGES val:33 [ 41.319242] BUG: Bad rss-counter state mm:00000000c539535c type:MM_ANONPAGES val:22 [ 41.706740] BUG: Bad rss-counter state mm:000000009a58f9c3 type:MM_FILEPAGES val:33 [ 41.707742] BUG: Bad rss-counter state mm:000000009a58f9c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38060' (ECDSA) to the list of known hosts. 2023/06/20 17:28:41 fuzzer started 2023/06/20 17:28:42 dialing manager at localhost:36067 2023/06/20 17:28:42 checking machine... 2023/06/20 17:28:42 checking revisions... [ 42.404468] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:28:42 testing simple program... [ 42.455922] cgroup: Unknown subsys name 'net' [ 42.496394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:28:41 Registers: info registers vcpu 0 RAX=1ffffffff0c1ab04 RBX=0000000000000001 RCX=ffffffff860d5820 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff8880174cfb00 RBP=ffff8880174cfaf0 RSP=ffff8880174cfa28 R8 =ffffffff860d5824 R9 =ffff8880174cfad8 R10=0000000000038001 R11=0000000000010484 R12=ffff8880174cfaf8 R13=ffff8880174cfae0 R14=ffff8880174cff30 R15=ffff8880174cfa98 RIP=ffffffff81131118 RFL=00000213 [----A-C] 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 00007f203e98c900 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=00007f203ef41650 CR3=000000000cc1e000 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=00000000000000000000000000000000 XMM01=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=ffff888008c04400 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=00007ffcdceb3e98 CR3=000000000960a000 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=2031343a38323a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a38323a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000