syzkaller login: [ 32.294927] BUG: Bad rss-counter state mm:0000000058ffa47b type:MM_FILEPAGES val:33 [ 32.295963] BUG: Bad rss-counter state mm:0000000058ffa47b type:MM_ANONPAGES val:22 [ 32.336754] ================================================================== [ 32.337966] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.339077] Read of size 8 at addr ffff88800c67b140 by task sshd/220 [ 32.339982] [ 32.340213] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.341253] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.342385] Call Trace: [ 32.342706] [ 32.343063] dump_stack_lvl+0x91/0xf0 [ 32.343588] print_report+0xcc/0x620 [ 32.344098] ? __virt_addr_valid+0x102/0x340 [ 32.344735] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.345426] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.346128] kasan_report+0xbe/0xf0 [ 32.346607] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.347362] vma_interval_tree_remove+0xc75/0xec0 [ 32.347964] vma_prepare+0xc54/0x11a0 [ 32.348440] __split_vma+0x5af/0x950 [ 32.348910] ? __pfx___split_vma+0x10/0x10 [ 32.349435] ? find_held_lock+0x2c/0x110 [ 32.349951] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.350521] ? lock_is_held_type+0x9f/0x120 [ 32.351055] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.351658] ? mtree_range_walk+0x632/0x900 [ 32.352205] ? mas_walk+0x5c7/0x7c0 [ 32.352680] do_vmi_munmap+0x1f1/0x2b0 [ 32.353173] mmap_region+0x1f9/0x2660 [ 32.353655] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.354199] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.354910] ? __pfx_lock_acquire+0x10/0x10 [ 32.355441] ? __pfx_mmap_region+0x10/0x10 [ 32.355966] ? security_mmap_addr+0x7d/0xa0 [ 32.356496] ? get_unmapped_area+0x1f5/0x3f0 [ 32.357044] do_mmap+0x854/0xf00 [ 32.357481] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.357974] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.358543] ksys_mmap_pgoff+0x3af/0x500 [ 32.359045] do_syscall_64+0x3f/0x90 [ 32.359523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.360163] RIP: 0033:0x7fc65db18d82 [ 32.360616] 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 [ 32.362736] RSP: 002b:00007ffdacdec938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.363648] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc65db18d82 [ 32.364494] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc65cf52000 [ 32.365338] RBP: 00007fc65cf52000 R08: 0000000000000009 R09: 0000000000001000 [ 32.366196] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559b769aec0 [ 32.367042] R13: 00007ffdacdec950 R14: 00007ffdacdec980 R15: 00007ffdacdecce0 [ 32.367915] [ 32.368206] [ 32.368422] Allocated by task 213: [ 32.368852] kasan_save_stack+0x22/0x50 [ 32.369355] kasan_set_track+0x25/0x30 [ 32.369850] __kasan_slab_alloc+0x59/0x70 [ 32.370393] kmem_cache_alloc+0x16b/0x370 [ 32.370910] vm_area_dup+0x20/0x160 [ 32.371366] __split_vma+0x170/0x950 [ 32.371831] split_vma+0xc6/0x110 [ 32.372277] mprotect_fixup+0x8d2/0xb30 [ 32.372783] do_mprotect_pkey+0x87e/0xd40 [ 32.373310] __x64_sys_mprotect+0x78/0xc0 [ 32.373836] do_syscall_64+0x3f/0x90 [ 32.374325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.374968] [ 32.375182] Freed by task 210: [ 32.375576] kasan_save_stack+0x22/0x50 [ 32.376088] kasan_set_track+0x25/0x30 [ 32.376588] kasan_save_free_info+0x2b/0x50 [ 32.377130] __kasan_slab_free+0x10a/0x190 [ 32.377661] kmem_cache_free+0x10d/0x4d0 [ 32.378176] rcu_core+0x8c8/0x2860 [ 32.378621] __do_softirq+0x1b7/0x7d4 [ 32.379097] [ 32.379312] Last potentially related work creation: [ 32.379963] kasan_save_stack+0x22/0x50 [ 32.380467] __kasan_record_aux_stack+0x8e/0xa0 [ 32.381047] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.381683] remove_vma+0x139/0x170 [ 32.382151] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.382711] do_vmi_munmap+0x1f1/0x2b0 [ 32.383195] __vm_munmap+0x138/0x3a0 [ 32.383663] __x64_sys_munmap+0x59/0x80 [ 32.384156] do_syscall_64+0x3f/0x90 [ 32.384632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.385270] [ 32.385483] The buggy address belongs to the object at ffff88800c67b0e8 [ 32.385483] which belongs to the cache vm_area_struct of size 168 [ 32.386953] The buggy address is located 88 bytes inside of [ 32.386953] freed 168-byte region [ffff88800c67b0e8, ffff88800c67b190) [ 32.388354] [ 32.388569] The buggy address belongs to the physical page: [ 32.389220] page:000000000113e766 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc67b [ 32.390302] memcg:ffff88801674bc01 [ 32.390724] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.391363] page_type: 0xffffffff() [ 32.391808] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.392722] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801674bc01 [ 32.393634] page dumped because: kasan: bad access detected [ 32.394312] [ 32.394530] Memory state around the buggy address: [ 32.395107] ffff88800c67b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.395962] ffff88800c67b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.396809] >ffff88800c67b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.397664] ^ [ 32.398310] ffff88800c67b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.399163] ffff88800c67b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.400012] ================================================================== [ 32.400935] Disabling lock debugging due to kernel taint [ 34.509403] BUG: Bad rss-counter state mm:00000000cb2bd18c type:MM_FILEPAGES val:33 [ 34.510662] BUG: Bad rss-counter state mm:00000000cb2bd18c type:MM_ANONPAGES val:22 [ 34.977406] BUG: Bad rss-counter state mm:00000000cb30ed27 type:MM_FILEPAGES val:33 [ 34.978547] BUG: Bad rss-counter state mm:00000000cb30ed27 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35161' (ECDSA) to the list of known hosts. 2023/06/19 17:35:56 fuzzer started 2023/06/19 17:35:56 dialing manager at localhost:44161 2023/06/19 17:35:56 checking machine... 2023/06/19 17:35:56 checking revisions... [ 35.703360] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:35:56 testing simple program... [ 35.757958] cgroup: Unknown subsys name 'net' [ 35.811126] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:35:55 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002fbef21 RSP=ffff888017df78e8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=ffff888016409980 RIP=ffffffff8180efb5 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 00007faf1283c900 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=00007ffc326ad000 CR3=000000000ee02000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffed100d9e1368 RCX=ffffffff860723cc RDX=1ffff1100d9e1353 RSI=0000000000000001 RDI=ffffffff85d793d4 RBP=ffff88806cf09b30 RSP=ffff88806cf09b20 R8 =ffffffff860723cc R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88801a107a00 RIP=ffffffff810bd08b RFL=00000292 [--S-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 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=00007f9a616f5858 CR3=000000001a02a000 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=2035353a35333a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a35333a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000