syzkaller login: [ 32.329936] BUG: Bad rss-counter state mm:00000000fa10c5c1 type:MM_FILEPAGES val:33 [ 32.331242] BUG: Bad rss-counter state mm:00000000fa10c5c1 type:MM_ANONPAGES val:22 [ 32.372011] ================================================================== [ 32.372947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.374002] Read of size 8 at addr ffff8880100285c8 by task sshd/219 [ 32.374791] [ 32.375066] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.376073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.377163] Call Trace: [ 32.377472] [ 32.377757] dump_stack_lvl+0x91/0xf0 [ 32.378252] print_report+0xcc/0x620 [ 32.378729] ? __virt_addr_valid+0x102/0x340 [ 32.379273] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.379888] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.380501] kasan_report+0xbe/0xf0 [ 32.380965] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.381596] vma_interval_tree_remove+0xc75/0xec0 [ 32.382217] vma_prepare+0xc54/0x11a0 [ 32.382695] __split_vma+0x5af/0x950 [ 32.383166] ? __pfx___split_vma+0x10/0x10 [ 32.383691] ? find_held_lock+0x2c/0x110 [ 32.384207] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.384773] ? lock_is_held_type+0x9f/0x120 [ 32.385314] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.385926] ? mtree_range_walk+0x632/0x900 [ 32.386480] ? mas_walk+0x5c7/0x7c0 [ 32.386942] do_vmi_munmap+0x1f1/0x2b0 [ 32.387432] mmap_region+0x1f9/0x2660 [ 32.387921] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.388423] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.389131] ? __pfx_lock_acquire+0x10/0x10 [ 32.389659] ? __pfx_mmap_region+0x10/0x10 [ 32.390189] ? security_mmap_addr+0x7d/0xa0 [ 32.390712] ? get_unmapped_area+0x1f5/0x3f0 [ 32.391251] do_mmap+0x854/0xf00 [ 32.391690] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.392176] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.392727] ksys_mmap_pgoff+0x3af/0x500 [ 32.393227] do_syscall_64+0x3f/0x90 [ 32.393695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.394358] RIP: 0033:0x7f51a7dbfd82 [ 32.394810] 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 [ 32.396936] RSP: 002b:00007ffcb34f6538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.397828] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f51a7dbfd82 [ 32.398668] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51a71f9000 [ 32.399500] RBP: 00007f51a71f9000 R08: 0000000000000009 R09: 0000000000001000 [ 32.400345] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561eff053f70 [ 32.401185] R13: 00007ffcb34f6550 R14: 00007ffcb34f6580 R15: 00007ffcb34f68e0 [ 32.402033] [ 32.402319] [ 32.402531] Allocated by task 212: [ 32.402951] kasan_save_stack+0x22/0x50 [ 32.403448] kasan_set_track+0x25/0x30 [ 32.403930] __kasan_slab_alloc+0x59/0x70 [ 32.404445] kmem_cache_alloc+0x16b/0x370 [ 32.404949] vm_area_dup+0x20/0x160 [ 32.405394] __split_vma+0x170/0x950 [ 32.405879] split_vma+0xc6/0x110 [ 32.406317] mprotect_fixup+0x8d2/0xb30 [ 32.406808] do_mprotect_pkey+0x87e/0xd40 [ 32.407333] __x64_sys_mprotect+0x78/0xc0 [ 32.407843] do_syscall_64+0x3f/0x90 [ 32.408313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.408961] [ 32.409179] Freed by task 202: [ 32.409573] kasan_save_stack+0x22/0x50 [ 32.410085] kasan_set_track+0x25/0x30 [ 32.410570] kasan_save_free_info+0x2b/0x50 [ 32.411093] __kasan_slab_free+0x10a/0x190 [ 32.411623] kmem_cache_free+0x10d/0x4d0 [ 32.412124] rcu_core+0x8c8/0x2860 [ 32.412567] __do_softirq+0x1b7/0x7d4 [ 32.413034] [ 32.413246] Last potentially related work creation: [ 32.413830] kasan_save_stack+0x22/0x50 [ 32.414328] __kasan_record_aux_stack+0x8e/0xa0 [ 32.414898] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.415540] remove_vma+0x139/0x170 [ 32.415991] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.416539] do_vmi_munmap+0x1f1/0x2b0 [ 32.417113] __vm_munmap+0x138/0x3a0 [ 32.417574] __x64_sys_munmap+0x59/0x80 [ 32.418071] do_syscall_64+0x3f/0x90 [ 32.418540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.419184] [ 32.419392] The buggy address belongs to the object at ffff888010028570 [ 32.419392] which belongs to the cache vm_area_struct of size 168 [ 32.420835] The buggy address is located 88 bytes inside of [ 32.420835] freed 168-byte region [ffff888010028570, ffff888010028618) [ 32.422244] [ 32.422458] The buggy address belongs to the physical page: [ 32.423104] page:0000000029a406a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10028 [ 32.424170] memcg:ffff888019e5e601 [ 32.424584] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.425218] page_type: 0xffffffff() [ 32.425667] raw: 0100000000000200 ffff88800879fc80 ffffea00005630c0 dead000000000008 [ 32.426588] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e5e601 [ 32.427491] page dumped because: kasan: bad access detected [ 32.428138] [ 32.428345] Memory state around the buggy address: [ 32.428899] ffff888010028480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.429705] ffff888010028500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.430531] >ffff888010028580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.431346] ^ [ 32.431975] ffff888010028600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 32.432785] ffff888010028680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.433595] ================================================================== [ 32.434484] Disabling lock debugging due to kernel taint [ 34.347209] BUG: Bad rss-counter state mm:000000009d772c94 type:MM_FILEPAGES val:33 [ 34.348084] BUG: Bad rss-counter state mm:000000009d772c94 type:MM_ANONPAGES val:22 [ 34.872306] BUG: Bad rss-counter state mm:0000000074381b46 type:MM_FILEPAGES val:33 [ 34.873504] BUG: Bad rss-counter state mm:0000000074381b46 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1700' (ECDSA) to the list of known hosts. 2023/06/20 02:43:53 fuzzer started 2023/06/20 02:43:54 dialing manager at localhost:44161 2023/06/20 02:43:54 checking machine... 2023/06/20 02:43:54 checking revisions... [ 35.615540] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:43:54 testing simple program... [ 35.661014] cgroup: Unknown subsys name 'net' [ 35.700561] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:43:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff81b3b1b0 RCX=00000000000007ff RDX=ffff888016517e18 RSI=ffff88800da09a80 RDI=ffffffff856f0b20 RBP=ffff888019a46fa8 RSP=ffff888016517d78 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888016517e18 R13=ffff88800da09a80 R14=00000000000007ff R15=ffffffff856f0b20 RIP=ffffffff81b3b1b4 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 00007f9550ac9900 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=00007f955107e650 CR3=0000000016d70000 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=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180ae86 RBX=0000000000000005 RCX=0000000000000001 RDX=0000000000092cc0 RSI=0000000000000012 RDI=ffff88800d91f368 RBP=dffffc0000000000 RSP=ffff88800d91f2b0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000012 R13=0000000000092cc0 R14=ffff88800d91f340 R15=0000000000092cc0 RIP=ffffffff813ad5d5 RFL=00000283 [--S---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 00007f8aa228d900 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=00007f8aa168d248 CR3=000000000da12000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=c016f102f8423a8400000000000ae988 XMM05=c28350eec3d69a860000000000134b90 XMM06=1d9a8df52a923f780000000000133930 XMM07=fb795ef6d65770560000000000123e58 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000