syzkaller login: [ 32.219274] BUG: Bad rss-counter state mm:00000000b2f3a1e9 type:MM_FILEPAGES val:33 [ 32.220474] BUG: Bad rss-counter state mm:00000000b2f3a1e9 type:MM_ANONPAGES val:22 [ 32.386691] ================================================================== [ 32.387590] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.388549] Read of size 8 at addr ffff8880195844e0 by task sshd/221 [ 32.389397] [ 32.389653] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.390521] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.391499] Call Trace: [ 32.391825] [ 32.392140] dump_stack_lvl+0x91/0xf0 [ 32.392635] print_report+0xcc/0x620 [ 32.393115] ? __virt_addr_valid+0x102/0x340 [ 32.393664] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.394278] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.394894] kasan_report+0xbe/0xf0 [ 32.395369] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.395985] vma_interval_tree_remove+0xc75/0xec0 [ 32.396585] vma_prepare+0xc54/0x11a0 [ 32.397066] __split_vma+0x5af/0x950 [ 32.397535] ? __pfx___split_vma+0x10/0x10 [ 32.398059] ? find_held_lock+0x2c/0x110 [ 32.398574] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.399138] ? lock_is_held_type+0x9f/0x120 [ 32.399686] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.400309] ? mtree_range_walk+0x632/0x900 [ 32.400858] ? mas_walk+0x5c7/0x7c0 [ 32.401332] do_vmi_munmap+0x1f1/0x2b0 [ 32.401828] mmap_region+0x1f9/0x2660 [ 32.402322] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.402837] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.403562] ? __pfx_lock_acquire+0x10/0x10 [ 32.404103] ? __pfx_mmap_region+0x10/0x10 [ 32.404652] ? security_mmap_addr+0x7d/0xa0 [ 32.405182] ? get_unmapped_area+0x1f5/0x3f0 [ 32.405735] do_mmap+0x854/0xf00 [ 32.406174] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.406677] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.407247] ksys_mmap_pgoff+0x3af/0x500 [ 32.407749] do_syscall_64+0x3f/0x90 [ 32.408240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.408886] RIP: 0033:0x7f59839c0d82 [ 32.409349] 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 [ 32.411467] RSP: 002b:00007fff362b7c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.412382] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59839c0d82 [ 32.413225] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5982dfa000 [ 32.414067] RBP: 00007f5982dfa000 R08: 0000000000000009 R09: 0000000000001000 [ 32.414904] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600de245ec0 [ 32.415736] R13: 00007fff362b7c90 R14: 00007fff362b7cc0 R15: 00007fff362b8020 [ 32.416589] [ 32.416881] [ 32.417098] Allocated by task 214: [ 32.417523] kasan_save_stack+0x22/0x50 [ 32.418031] kasan_set_track+0x25/0x30 [ 32.418521] __kasan_slab_alloc+0x59/0x70 [ 32.419049] kmem_cache_alloc+0x16b/0x370 [ 32.419556] vm_area_dup+0x20/0x160 [ 32.420010] __split_vma+0x170/0x950 [ 32.420479] split_vma+0xc6/0x110 [ 32.420919] mprotect_fixup+0x8d2/0xb30 [ 32.421417] do_mprotect_pkey+0x87e/0xd40 [ 32.421945] __x64_sys_mprotect+0x78/0xc0 [ 32.422468] do_syscall_64+0x3f/0x90 [ 32.422939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.423578] [ 32.423792] Freed by task 214: [ 32.424202] kasan_save_stack+0x22/0x50 [ 32.424707] kasan_set_track+0x25/0x30 [ 32.425210] kasan_save_free_info+0x2b/0x50 [ 32.425747] __kasan_slab_free+0x10a/0x190 [ 32.426284] kmem_cache_free+0x10d/0x4d0 [ 32.426800] rcu_core+0x8c8/0x2860 [ 32.427242] __do_softirq+0x1b7/0x7d4 [ 32.427714] [ 32.427931] Last potentially related work creation: [ 32.428516] kasan_save_stack+0x22/0x50 [ 32.429020] __kasan_record_aux_stack+0x8e/0xa0 [ 32.429596] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.430242] remove_vma+0x139/0x170 [ 32.430693] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.431249] do_vmi_munmap+0x1f1/0x2b0 [ 32.431742] __vm_munmap+0x138/0x3a0 [ 32.432246] __x64_sys_munmap+0x59/0x80 [ 32.432741] do_syscall_64+0x3f/0x90 [ 32.433213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.433857] [ 32.434065] The buggy address belongs to the object at ffff888019584488 [ 32.434065] which belongs to the cache vm_area_struct of size 168 [ 32.435448] The buggy address is located 88 bytes inside of [ 32.435448] freed 168-byte region [ffff888019584488, ffff888019584530) [ 32.436774] [ 32.436982] The buggy address belongs to the physical page: [ 32.437603] page:0000000083cc5509 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19584 [ 32.438628] memcg:ffff88801b891201 [ 32.439030] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.439633] page_type: 0xffffffff() [ 32.440060] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.440966] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b891201 [ 32.441824] page dumped because: kasan: bad access detected [ 32.442447] [ 32.442652] Memory state around the buggy address: [ 32.443200] ffff888019584380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.444006] ffff888019584400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.444814] >ffff888019584480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.445617] ^ [ 32.446323] ffff888019584500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.447132] ffff888019584580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.447926] ================================================================== [ 32.449015] Disabling lock debugging due to kernel taint [ 34.826856] BUG: Bad rss-counter state mm:0000000021fdd446 type:MM_FILEPAGES val:33 [ 34.827848] BUG: Bad rss-counter state mm:0000000021fdd446 type:MM_ANONPAGES val:22 [ 35.361227] BUG: Bad rss-counter state mm:00000000339c9f01 type:MM_FILEPAGES val:33 [ 35.362373] BUG: Bad rss-counter state mm:00000000339c9f01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11048' (ECDSA) to the list of known hosts. 2023/06/20 05:52:54 fuzzer started 2023/06/20 05:52:54 dialing manager at localhost:44161 2023/06/20 05:52:54 checking machine... 2023/06/20 05:52:54 checking revisions... [ 36.011707] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:52:54 testing simple program... [ 36.061639] cgroup: Unknown subsys name 'net' [ 36.108218] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:52:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800fe381b8 RCX=0000000000000000 RDX=ffff888014780000 RSI=ffffffff8366392d RDI=ffff88800fe381d0 RBP=ffff88800c6bd000 RSP=ffff88801476f968 R8 =0000000000000004 R9 =000000000000e7bc R10=000000000000e7bc R11=0000000000000001 R12=ffff88800fe38650 R13=ffff88800fe381d0 R14=ffff88801476fa70 R15=0000000000000053 RIP=ffffffff8452fd04 RFL=00000293 [--S-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 00007fdfc5f09900 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=00007fdfc535ff90 CR3=000000000c9a2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=41d886410ff0219e00000000000ae988 XMM05=977f92345a6dcd7f0000000000134c30 XMM06=c291bd5c70af25b90000000000133a20 XMM07=fb795ef6d65770560000000000123f90 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019718080 RCX=0000000000000000 RDX=1ffff110011ae388 RSI=000000000000025a RDI=ffff888008d71c40 RBP=0000000000000000 RSP=ffff88806cf09da8 R8 =0000000000006400 R9 =ffff88806cf3965c R10=0000000000000000 R11=0000000000000001 R12=ffff888008d71bc0 R13=dffffc0000000000 R14=ffff888008d71c40 R15=ffff888008d71bc0 RIP=ffffffff812530b6 RFL=00000096 [--S-AP-] 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 00007f2e8ca49900 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=00007ffd6cbf1000 CR3=000000000f088000 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=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