syzkaller login: [ 28.720364] BUG: Bad rss-counter state mm:0000000085ed5355 type:MM_FILEPAGES val:33 [ 28.721874] BUG: Bad rss-counter state mm:0000000085ed5355 type:MM_ANONPAGES val:22 [ 28.865436] ================================================================== [ 28.866339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.867281] Read of size 8 at addr ffff8880145c9228 by task sshd/220 [ 28.868055] [ 28.868279] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.869307] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.870302] Call Trace: [ 28.870622] [ 28.870912] dump_stack_lvl+0x91/0xf0 [ 28.871411] print_report+0xcc/0x620 [ 28.871913] ? __virt_addr_valid+0x102/0x340 [ 28.872499] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.873112] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.873723] kasan_report+0xbe/0xf0 [ 28.874204] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.874822] vma_interval_tree_remove+0xc75/0xec0 [ 28.875427] vma_prepare+0xc54/0x11a0 [ 28.875910] __split_vma+0x5af/0x950 [ 28.876380] ? __pfx___split_vma+0x10/0x10 [ 28.876925] ? find_held_lock+0x2c/0x110 [ 28.877447] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.878013] ? lock_is_held_type+0x9f/0x120 [ 28.878553] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.879168] ? mtree_range_walk+0x632/0x900 [ 28.879725] ? mas_walk+0x5c7/0x7c0 [ 28.880202] do_vmi_munmap+0x1f1/0x2b0 [ 28.880702] mmap_region+0x1f9/0x2660 [ 28.881185] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.881707] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.882424] ? __pfx_lock_acquire+0x10/0x10 [ 28.882964] ? __pfx_mmap_region+0x10/0x10 [ 28.883500] ? security_mmap_addr+0x7d/0xa0 [ 28.884032] ? get_unmapped_area+0x1f5/0x3f0 [ 28.884593] do_mmap+0x854/0xf00 [ 28.885031] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.885531] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.886087] ksys_mmap_pgoff+0x3af/0x500 [ 28.886592] do_syscall_64+0x3f/0x90 [ 28.887066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.887720] RIP: 0033:0x7fd74780dd82 [ 28.888176] 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 [ 28.890345] RSP: 002b:00007fff04ef5418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.891255] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd74780dd82 [ 28.892105] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd746c47000 [ 28.892964] RBP: 00007fd746c47000 R08: 0000000000000009 R09: 0000000000001000 [ 28.893827] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ffe1783ec0 [ 28.894674] R13: 00007fff04ef5430 R14: 00007fff04ef5460 R15: 00007fff04ef57c0 [ 28.895536] [ 28.895832] [ 28.896048] Allocated by task 213: [ 28.896496] kasan_save_stack+0x22/0x50 [ 28.897007] kasan_set_track+0x25/0x30 [ 28.897506] __kasan_slab_alloc+0x59/0x70 [ 28.898033] kmem_cache_alloc+0x16b/0x370 [ 28.898553] vm_area_dup+0x20/0x160 [ 28.899011] __split_vma+0x170/0x950 [ 28.899481] split_vma+0xc6/0x110 [ 28.899924] mprotect_fixup+0x8d2/0xb30 [ 28.900426] do_mprotect_pkey+0x87e/0xd40 [ 28.900960] __x64_sys_mprotect+0x78/0xc0 [ 28.901477] do_syscall_64+0x3f/0x90 [ 28.901952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.902591] [ 28.902811] Freed by task 203: [ 28.903209] kasan_save_stack+0x22/0x50 [ 28.903717] kasan_set_track+0x25/0x30 [ 28.904214] kasan_save_free_info+0x2b/0x50 [ 28.904753] __kasan_slab_free+0x10a/0x190 [ 28.905295] kmem_cache_free+0x10d/0x4d0 [ 28.905801] rcu_core+0x8c8/0x2860 [ 28.906250] __do_softirq+0x1b7/0x7d4 [ 28.906724] [ 28.906942] Last potentially related work creation: [ 28.907524] kasan_save_stack+0x22/0x50 [ 28.908030] __kasan_record_aux_stack+0x8e/0xa0 [ 28.908631] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.909282] remove_vma+0x139/0x170 [ 28.909782] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.910343] do_vmi_munmap+0x1f1/0x2b0 [ 28.910833] __vm_munmap+0x138/0x3a0 [ 28.911304] __x64_sys_munmap+0x59/0x80 [ 28.911800] do_syscall_64+0x3f/0x90 [ 28.912276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.912928] [ 28.913147] The buggy address belongs to the object at ffff8880145c91d0 [ 28.913147] which belongs to the cache vm_area_struct of size 168 [ 28.914611] The buggy address is located 88 bytes inside of [ 28.914611] freed 168-byte region [ffff8880145c91d0, ffff8880145c9278) [ 28.916016] [ 28.916235] The buggy address belongs to the physical page: [ 28.916898] page:00000000a165da55 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145c9 [ 28.917982] memcg:ffff888016943301 [ 28.918413] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.919054] page_type: 0xffffffff() [ 28.919507] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.920419] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016943301 [ 28.921341] page dumped because: kasan: bad access detected [ 28.922000] [ 28.922219] Memory state around the buggy address: [ 28.922801] ffff8880145c9100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.923655] ffff8880145c9180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.924514] >ffff8880145c9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.925358] ^ [ 28.925911] ffff8880145c9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.926766] ffff8880145c9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.927616] ================================================================== [ 28.928542] Disabling lock debugging due to kernel taint [ 30.963998] BUG: Bad rss-counter state mm:000000001c2a7b5b type:MM_FILEPAGES val:33 [ 30.965038] BUG: Bad rss-counter state mm:000000001c2a7b5b type:MM_ANONPAGES val:22 [ 31.459125] BUG: Bad rss-counter state mm:00000000791713a5 type:MM_FILEPAGES val:33 [ 31.460119] BUG: Bad rss-counter state mm:00000000791713a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25100' (ECDSA) to the list of known hosts. 2023/06/21 00:55:09 fuzzer started 2023/06/21 00:55:09 dialing manager at localhost:36067 2023/06/21 00:55:09 checking machine... 2023/06/21 00:55:09 checking revisions... [ 32.183095] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:55:09 testing simple program... [ 32.238814] cgroup: Unknown subsys name 'net' [ 32.290807] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:55:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff87b6c480 RCX=0000000000000000 RDX=1ffffffff0f6d896 RSI=ffffffff8562bc80 RDI=ffffffff87b6c480 RBP=0000000000000000 RSP=ffff88806ce09ca0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=0000000000000000 R13=ffffffff87b6c510 R14=176a868317b13800 R15=ffffffff87b6c4a8 RIP=ffffffff813c5c32 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 00007ffb65f3a700 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=00007f0e5197e0b0 CR3=000000000e0ca000 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=2038303a35353a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a35353a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000006 RBX=0000000000000001 RCX=ffffffff810001cd RDX=0000000000000006 RSI=ffffffff86073d08 RDI=ffffffff85d7a9c4 RBP=ffff88806cf09af0 RSP=ffff88806cf099f0 R8 =ffffffff86073d08 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000000000 R12=ffffffff85d7a9d8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8112fc21 RFL=00000206 [-----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 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=00007fa578d984b0 CR3=0000000012fb4000 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=d0fbd3282b934c84ea4c49514292f438 XMM02=0000000000119d90ec2efd57dc4c00df XMM03=00000000001212a06914fc8cebd6e77c XMM04=fb41e205e0e96b4d00000000000ae988 XMM05=19e9129bd510f23500000000001310d0 XMM06=f844e2b0ee37eb1d000000000012ff38 XMM07=e042d86d42eb936e0000000000121520 XMM08=6914fc8cebd6e77c0000000000119df0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000