syzkaller login: [ 30.535120] BUG: Bad rss-counter state mm:00000000da2b0f7a type:MM_FILEPAGES val:33 [ 30.536133] BUG: Bad rss-counter state mm:00000000da2b0f7a type:MM_ANONPAGES val:22 [ 30.705760] ================================================================== [ 30.706839] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.708028] Read of size 8 at addr ffff888019de76b0 by task sshd/220 [ 30.708982] [ 30.709201] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.710071] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.711092] Call Trace: [ 30.711470] [ 30.711770] dump_stack_lvl+0x91/0xf0 [ 30.712272] print_report+0xcc/0x620 [ 30.712762] ? __virt_addr_valid+0x102/0x340 [ 30.713318] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.713944] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.714563] kasan_report+0xbe/0xf0 [ 30.715043] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.715729] vma_interval_tree_remove+0xc75/0xec0 [ 30.716339] vma_prepare+0xc54/0x11a0 [ 30.716819] __split_vma+0x5af/0x950 [ 30.717302] ? __pfx___split_vma+0x10/0x10 [ 30.717837] ? find_held_lock+0x2c/0x110 [ 30.718358] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.718923] ? lock_is_held_type+0x9f/0x120 [ 30.719528] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.720143] ? mtree_range_walk+0x632/0x900 [ 30.720701] ? mas_walk+0x5c7/0x7c0 [ 30.721189] do_vmi_munmap+0x1f1/0x2b0 [ 30.721682] mmap_region+0x1f9/0x2660 [ 30.722168] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.722692] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.723445] ? __pfx_lock_acquire+0x10/0x10 [ 30.723994] ? __pfx_mmap_region+0x10/0x10 [ 30.724528] ? security_mmap_addr+0x7d/0xa0 [ 30.725055] ? get_unmapped_area+0x1f5/0x3f0 [ 30.725618] do_mmap+0x854/0xf00 [ 30.726054] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.726550] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.727122] ksys_mmap_pgoff+0x3af/0x500 [ 30.727699] do_syscall_64+0x3f/0x90 [ 30.728191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.728853] RIP: 0033:0x7f35a88c5d82 [ 30.729306] 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 [ 30.731522] RSP: 002b:00007ffea17bcc38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.732434] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35a88c5d82 [ 30.733288] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35a7cff000 [ 30.734146] RBP: 00007f35a7cff000 R08: 0000000000000009 R09: 0000000000001000 [ 30.735011] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dfef652ec0 [ 30.735925] R13: 00007ffea17bcc50 R14: 00007ffea17bcc80 R15: 00007ffea17bcfe0 [ 30.736809] [ 30.737110] [ 30.737328] Allocated by task 213: [ 30.737762] kasan_save_stack+0x22/0x50 [ 30.738274] kasan_set_track+0x25/0x30 [ 30.738778] __kasan_slab_alloc+0x59/0x70 [ 30.739348] kmem_cache_alloc+0x16b/0x370 [ 30.739898] vm_area_dup+0x20/0x160 [ 30.740360] __split_vma+0x170/0x950 [ 30.740831] split_vma+0xc6/0x110 [ 30.741272] mprotect_fixup+0x8d2/0xb30 [ 30.741781] do_mprotect_pkey+0x87e/0xd40 [ 30.742297] __x64_sys_mprotect+0x78/0xc0 [ 30.742813] do_syscall_64+0x3f/0x90 [ 30.743321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.743988] [ 30.744203] Freed by task 203: [ 30.744598] kasan_save_stack+0x22/0x50 [ 30.745106] kasan_set_track+0x25/0x30 [ 30.745598] kasan_save_free_info+0x2b/0x50 [ 30.746131] __kasan_slab_free+0x10a/0x190 [ 30.746657] kmem_cache_free+0x10d/0x4d0 [ 30.747168] rcu_core+0x8c8/0x2860 [ 30.747657] __do_softirq+0x1b7/0x7d4 [ 30.748140] [ 30.748355] Last potentially related work creation: [ 30.748950] kasan_save_stack+0x22/0x50 [ 30.749528] __kasan_record_aux_stack+0x8e/0xa0 [ 30.750107] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.750765] remove_vma+0x139/0x170 [ 30.751242] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.751831] do_vmi_munmap+0x1f1/0x2b0 [ 30.752330] __vm_munmap+0x138/0x3a0 [ 30.752807] __x64_sys_munmap+0x59/0x80 [ 30.753313] do_syscall_64+0x3f/0x90 [ 30.753794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754438] [ 30.754657] The buggy address belongs to the object at ffff888019de7658 [ 30.754657] which belongs to the cache vm_area_struct of size 168 [ 30.756186] The buggy address is located 88 bytes inside of [ 30.756186] freed 168-byte region [ffff888019de7658, ffff888019de7700) [ 30.757604] [ 30.757822] The buggy address belongs to the physical page: [ 30.758492] page:00000000a3478ea0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19de7 [ 30.759634] memcg:ffff88800c980001 [ 30.760075] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.760728] page_type: 0xffffffff() [ 30.761190] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.762114] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c980001 [ 30.763030] page dumped because: kasan: bad access detected [ 30.763748] [ 30.763968] Memory state around the buggy address: [ 30.764552] ffff888019de7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.765410] ffff888019de7600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.766269] >ffff888019de7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.767109] ^ [ 30.767751] ffff888019de7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.768617] ffff888019de7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.769483] ================================================================== [ 30.770440] Disabling lock debugging due to kernel taint [ 32.747636] BUG: Bad rss-counter state mm:000000009286fccd type:MM_FILEPAGES val:33 [ 32.748696] BUG: Bad rss-counter state mm:000000009286fccd type:MM_ANONPAGES val:22 [ 33.240319] BUG: Bad rss-counter state mm:0000000011a1be42 type:MM_FILEPAGES val:33 [ 33.241559] BUG: Bad rss-counter state mm:0000000011a1be42 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64691' (ECDSA) to the list of known hosts. 2023/06/20 17:21:28 fuzzer started 2023/06/20 17:21:28 dialing manager at localhost:36067 2023/06/20 17:21:28 checking machine... 2023/06/20 17:21:28 checking revisions... [ 34.044375] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:21:28 testing simple program... [ 34.091374] cgroup: Unknown subsys name 'net' [ 34.136589] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:21:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff11003947109 RSI=ffffffff8368279b RDI=ffff88801ca38848 RBP=ffff88801ca38780 RSP=ffff88800c6c7998 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff83c208fc R13=ffff88800f12edc0 R14=ffff88800c6c7a88 R15=ffff88801ca38780 RIP=ffffffff814c0864 RFL=00000286 [--S--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 00007f0ba5d5a700 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=00007f6fd04f4360 CR3=0000000009cd8000 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=00000000000000000000000000000000 XMM01=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323230 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffff888016411b40 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806cf099f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff888019dc9ac8 RIP=ffffffff814c0400 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 00007f0ba5558700 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=00007fff0dafc000 CR3=0000000009cd8000 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=2037323a31323a3731203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a323230343520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a31323a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000