syzkaller login: [ 38.840016] BUG: Bad rss-counter state mm:000000009e47a455 type:MM_FILEPAGES val:33 [ 38.841281] BUG: Bad rss-counter state mm:000000009e47a455 type:MM_ANONPAGES val:22 [ 38.880031] ================================================================== [ 38.881232] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.882477] Read of size 8 at addr ffff88800e2674e0 by task sshd/219 [ 38.883457] [ 38.883753] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.884789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.885797] Call Trace: [ 38.886124] [ 38.886424] dump_stack_lvl+0x91/0xf0 [ 38.886918] print_report+0xcc/0x620 [ 38.887424] ? __virt_addr_valid+0x102/0x340 [ 38.887982] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888651] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889304] kasan_report+0xbe/0xf0 [ 38.889799] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890458] vma_interval_tree_remove+0xc75/0xec0 [ 38.891079] vma_prepare+0xc54/0x11a0 [ 38.891569] __split_vma+0x5af/0x950 [ 38.892055] ? __pfx___split_vma+0x10/0x10 [ 38.892640] ? find_held_lock+0x2c/0x110 [ 38.893164] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.893763] ? lock_is_held_type+0x9f/0x120 [ 38.894356] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.894972] ? mtree_range_walk+0x632/0x900 [ 38.895553] ? mas_walk+0x5c7/0x7c0 [ 38.896033] do_vmi_munmap+0x1f1/0x2b0 [ 38.896624] mmap_region+0x1f9/0x2660 [ 38.897108] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.897633] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.898364] ? __pfx_lock_acquire+0x10/0x10 [ 38.898904] ? __pfx_mmap_region+0x10/0x10 [ 38.899463] ? security_mmap_addr+0x7d/0xa0 [ 38.900002] ? get_unmapped_area+0x1f5/0x3f0 [ 38.900573] do_mmap+0x854/0xf00 [ 38.901021] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.901588] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.902265] ksys_mmap_pgoff+0x3af/0x500 [ 38.902954] do_syscall_64+0x3f/0x90 [ 38.903503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.904310] RIP: 0033:0x7efd67dccd82 [ 38.904913] 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 [ 38.907543] RSP: 002b:00007ffe7f226238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.908694] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd67dccd82 [ 38.909686] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd67206000 [ 38.910694] RBP: 00007efd67206000 R08: 0000000000000009 R09: 0000000000001000 [ 38.911768] R10: 0000000000000812 R11: 0000000000000206 R12: 00005637f3394ec0 [ 38.912790] R13: 00007ffe7f226250 R14: 00007ffe7f226280 R15: 00007ffe7f2265e0 [ 38.913864] [ 38.914250] [ 38.914475] Allocated by task 212: [ 38.914924] kasan_save_stack+0x22/0x50 [ 38.915604] kasan_set_track+0x25/0x30 [ 38.916245] __kasan_slab_alloc+0x59/0x70 [ 38.916810] kmem_cache_alloc+0x16b/0x370 [ 38.917477] vm_area_dup+0x20/0x160 [ 38.918063] __split_vma+0x170/0x950 [ 38.918534] split_vma+0xc6/0x110 [ 38.919052] mprotect_fixup+0x8d2/0xb30 [ 38.919699] do_mprotect_pkey+0x87e/0xd40 [ 38.920317] __x64_sys_mprotect+0x78/0xc0 [ 38.921015] do_syscall_64+0x3f/0x90 [ 38.921557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.922281] [ 38.922561] Freed by task 212: [ 38.923069] kasan_save_stack+0x22/0x50 [ 38.923619] kasan_set_track+0x25/0x30 [ 38.924155] kasan_save_free_info+0x2b/0x50 [ 38.924885] __kasan_slab_free+0x10a/0x190 [ 38.925549] kmem_cache_free+0x10d/0x4d0 [ 38.926082] rcu_core+0x8c8/0x2860 [ 38.926533] __do_softirq+0x1b7/0x7d4 [ 38.927157] [ 38.927444] Last potentially related work creation: [ 38.928107] kasan_save_stack+0x22/0x50 [ 38.928705] __kasan_record_aux_stack+0x8e/0xa0 [ 38.929473] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.930259] remove_vma+0x139/0x170 [ 38.930843] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.931426] do_vmi_munmap+0x1f1/0x2b0 [ 38.932011] __vm_munmap+0x138/0x3a0 [ 38.932650] __x64_sys_munmap+0x59/0x80 [ 38.933197] do_syscall_64+0x3f/0x90 [ 38.933755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.934585] [ 38.934802] Second to last potentially related work creation: [ 38.935548] kasan_save_stack+0x22/0x50 [ 38.936204] __kasan_record_aux_stack+0x8e/0xa0 [ 38.936879] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.937641] remove_vma+0x139/0x170 [ 38.938228] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.938804] do_vmi_munmap+0x1f1/0x2b0 [ 38.939390] mmap_region+0x1f9/0x2660 [ 38.940021] do_mmap+0x854/0xf00 [ 38.940513] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.941040] ksys_mmap_pgoff+0x3af/0x500 [ 38.941697] do_syscall_64+0x3f/0x90 [ 38.942250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.943062] [ 38.943348] The buggy address belongs to the object at ffff88800e267488 [ 38.943348] which belongs to the cache vm_area_struct of size 168 [ 38.945175] The buggy address is located 88 bytes inside of [ 38.945175] freed 168-byte region [ffff88800e267488, ffff88800e267530) [ 38.946830] [ 38.947116] The buggy address belongs to the physical page: [ 38.947998] page:00000000e3d7a42d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe267 [ 38.949268] memcg:ffff88800e06bb01 [ 38.949822] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.950588] page_type: 0xffffffff() [ 38.951123] raw: 0100000000000200 ffff8880087a0c80 ffffea0000387080 dead000000000005 [ 38.952276] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e06bb01 [ 38.953458] page dumped because: kasan: bad access detected [ 38.954143] [ 38.954361] Memory state around the buggy address: [ 38.955108] ffff88800e267380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.956138] ffff88800e267400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.957220] >ffff88800e267480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.958256] ^ [ 38.959259] ffff88800e267500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 38.960199] ffff88800e267580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.961316] ================================================================== [ 38.962652] Disabling lock debugging due to kernel taint [ 41.240504] BUG: Bad rss-counter state mm:0000000072c926c5 type:MM_FILEPAGES val:33 [ 41.241532] BUG: Bad rss-counter state mm:0000000072c926c5 type:MM_ANONPAGES val:22 [ 41.716612] BUG: Bad rss-counter state mm:0000000080cd6c1f type:MM_FILEPAGES val:33 [ 41.718728] BUG: Bad rss-counter state mm:0000000080cd6c1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55483' (ECDSA) to the list of known hosts. 2023/06/20 19:04:48 fuzzer started 2023/06/20 19:04:48 dialing manager at localhost:36067 2023/06/20 19:04:48 checking machine... 2023/06/20 19:04:48 checking revisions... [ 42.423599] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:04:48 testing simple program... [ 42.476246] cgroup: Unknown subsys name 'net' [ 42.529924] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:04:48 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000001000 RCX=0000000000000800 RDX=0000000000000000 RSI=ffff88801b9a8800 RDI=0000564230a07cb0 RBP=0000564230a074b0 RSP=ffff888018ea7990 R8 =4c5359530a736579 R9 =4e455f47535f474f R10=0a73657909094241 R11=20664920230a230a R12=ffff88801b9a8000 R13=0000564230a084b0 R14=0000000000000000 R15=ffff888018ea7db0 RIP=ffffffff84501862 RFL=00040206 [-----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 00007f0efa4fc900 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=00007fff48c00000 CR3=0000000019d60000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 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=00007f544893ff90 CR3=0000000019d8c000 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=2038343a34303a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a34303a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000