syzkaller login: [ 33.417610] BUG: Bad rss-counter state mm:00000000c08c27dd type:MM_FILEPAGES val:33 [ 33.419429] BUG: Bad rss-counter state mm:00000000c08c27dd type:MM_ANONPAGES val:22 [ 33.577618] ================================================================== [ 33.578723] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.579648] Read of size 8 at addr ffff888018cce310 by task sshd/220 [ 33.580573] [ 33.580791] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.581657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.582691] Call Trace: [ 33.583013] [ 33.583305] dump_stack_lvl+0x91/0xf0 [ 33.583813] print_report+0xcc/0x620 [ 33.584301] ? __virt_addr_valid+0x102/0x340 [ 33.584863] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.585491] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.586155] kasan_report+0xbe/0xf0 [ 33.586647] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.587274] vma_interval_tree_remove+0xc75/0xec0 [ 33.587885] vma_prepare+0xc54/0x11a0 [ 33.588369] __split_vma+0x5af/0x950 [ 33.588842] ? __pfx___split_vma+0x10/0x10 [ 33.589368] ? find_held_lock+0x2c/0x110 [ 33.589887] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.590482] ? lock_is_held_type+0x9f/0x120 [ 33.591030] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.591640] ? mtree_range_walk+0x632/0x900 [ 33.592188] ? mas_walk+0x5c7/0x7c0 [ 33.592662] do_vmi_munmap+0x1f1/0x2b0 [ 33.593157] mmap_region+0x1f9/0x2660 [ 33.593639] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.594169] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.594878] ? __pfx_lock_acquire+0x10/0x10 [ 33.595411] ? __pfx_mmap_region+0x10/0x10 [ 33.595950] ? security_mmap_addr+0x7d/0xa0 [ 33.596475] ? get_unmapped_area+0x1f5/0x3f0 [ 33.597025] do_mmap+0x854/0xf00 [ 33.597468] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.597959] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.598539] ksys_mmap_pgoff+0x3af/0x500 [ 33.599056] do_syscall_64+0x3f/0x90 [ 33.599532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.600194] RIP: 0033:0x7f6286da9d82 [ 33.600651] 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 [ 33.602792] RSP: 002b:00007ffd7c9ee998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.603695] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6286da9d82 [ 33.604545] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62861e3000 [ 33.605407] RBP: 00007f62861e3000 R08: 0000000000000009 R09: 0000000000001000 [ 33.606276] R10: 0000000000000812 R11: 0000000000000206 R12: 000055faa9185f60 [ 33.607124] R13: 00007ffd7c9ee9b0 R14: 00007ffd7c9ee9e0 R15: 00007ffd7c9eed40 [ 33.607985] [ 33.608278] [ 33.608492] Allocated by task 213: [ 33.608916] kasan_save_stack+0x22/0x50 [ 33.609426] kasan_set_track+0x25/0x30 [ 33.609921] __kasan_slab_alloc+0x59/0x70 [ 33.610448] kmem_cache_alloc+0x16b/0x370 [ 33.610961] vm_area_dup+0x20/0x160 [ 33.611411] __split_vma+0x170/0x950 [ 33.611876] split_vma+0xc6/0x110 [ 33.612313] mprotect_fixup+0x8d2/0xb30 [ 33.612810] do_mprotect_pkey+0x87e/0xd40 [ 33.613336] __x64_sys_mprotect+0x78/0xc0 [ 33.613860] do_syscall_64+0x3f/0x90 [ 33.614352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.614996] [ 33.615211] Freed by task 213: [ 33.615609] kasan_save_stack+0x22/0x50 [ 33.616111] kasan_set_track+0x25/0x30 [ 33.616606] kasan_save_free_info+0x2b/0x50 [ 33.617145] __kasan_slab_free+0x10a/0x190 [ 33.617673] kmem_cache_free+0x10d/0x4d0 [ 33.618198] rcu_core+0x8c8/0x2860 [ 33.618646] __do_softirq+0x1b7/0x7d4 [ 33.619119] [ 33.619337] Last potentially related work creation: [ 33.619934] kasan_save_stack+0x22/0x50 [ 33.620440] __kasan_record_aux_stack+0x8e/0xa0 [ 33.621023] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.621722] remove_vma+0x139/0x170 [ 33.622194] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.622762] do_vmi_munmap+0x1f1/0x2b0 [ 33.623257] __vm_munmap+0x138/0x3a0 [ 33.623732] __x64_sys_munmap+0x59/0x80 [ 33.624238] do_syscall_64+0x3f/0x90 [ 33.624707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.625366] [ 33.625583] The buggy address belongs to the object at ffff888018cce2b8 [ 33.625583] which belongs to the cache vm_area_struct of size 168 [ 33.627079] The buggy address is located 88 bytes inside of [ 33.627079] freed 168-byte region [ffff888018cce2b8, ffff888018cce360) [ 33.628486] [ 33.628700] The buggy address belongs to the physical page: [ 33.629357] page:00000000c23672b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18cce [ 33.630459] memcg:ffff888009645301 [ 33.630881] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.631519] page_type: 0xffffffff() [ 33.631970] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.632883] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009645301 [ 33.633787] page dumped because: kasan: bad access detected [ 33.634454] [ 33.634667] Memory state around the buggy address: [ 33.635244] ffff888018cce200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.636094] ffff888018cce280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.636947] >ffff888018cce300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.637793] ^ [ 33.638265] ffff888018cce380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.639115] ffff888018cce400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.639976] ================================================================== [ 33.640902] Disabling lock debugging due to kernel taint [ 35.998688] BUG: Bad rss-counter state mm:000000009a549c0b type:MM_FILEPAGES val:33 [ 35.999893] BUG: Bad rss-counter state mm:000000009a549c0b type:MM_ANONPAGES val:22 [ 36.523348] BUG: Bad rss-counter state mm:000000006bb8e20f type:MM_FILEPAGES val:33 [ 36.524563] BUG: Bad rss-counter state mm:000000006bb8e20f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63258' (ECDSA) to the list of known hosts. 2023/06/19 23:23:36 fuzzer started 2023/06/19 23:23:36 dialing manager at localhost:44161 2023/06/19 23:23:36 checking machine... 2023/06/19 23:23:36 checking revisions... [ 37.272346] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:23:36 testing simple program... [ 37.327815] cgroup: Unknown subsys name 'net' [ 37.362679] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:23:34 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff856d8220 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=ffffffff856d8220 RSP=ffff88806ce09db0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000283 R13=ffff88800dc7c178 R14=ffffffff8186b9c5 R15=ffff88800f1e1700 RIP=ffffffff812e0410 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 0000000000000000 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=00007fdfe4897d90 CR3=000000000ef3a000 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=2036333a33323a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a33323a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff856d8220 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8228 RSP=ffff88801588f3a0 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=ffffffff856d8230 R13=0000000000000000 R14=0000000000002800 R15=0000000000000000 RIP=ffffffff812e04f6 RFL=00000012 [----A--] 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 00007f3d8d574900 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=00007f3d8d539008 CR3=000000000c4b2000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000