syzkaller login: [ 28.662164] BUG: Bad rss-counter state mm:00000000baf833f1 type:MM_FILEPAGES val:33 [ 28.662757] BUG: Bad rss-counter state mm:00000000baf833f1 type:MM_ANONPAGES val:22 [ 28.768880] ================================================================== [ 28.769687] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.770545] Read of size 8 at addr ffff888009bbf310 by task sshd/220 [ 28.771219] [ 28.771415] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.772170] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.772964] Call Trace: [ 28.773161] [ 28.773328] dump_stack_lvl+0x91/0xf0 [ 28.773623] print_report+0xcc/0x620 [ 28.773938] ? __virt_addr_valid+0x102/0x340 [ 28.774265] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.774704] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.775114] kasan_report+0xbe/0xf0 [ 28.775402] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.775795] vma_interval_tree_remove+0xc75/0xec0 [ 28.776158] vma_prepare+0xc54/0x11a0 [ 28.776460] __split_vma+0x5af/0x950 [ 28.776754] ? __pfx___split_vma+0x10/0x10 [ 28.777107] ? find_held_lock+0x2c/0x110 [ 28.777410] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.777773] ? lock_is_held_type+0x9f/0x120 [ 28.778102] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.778461] ? mtree_range_walk+0x632/0x900 [ 28.778808] ? mas_walk+0x5c7/0x7c0 [ 28.779132] do_vmi_munmap+0x1f1/0x2b0 [ 28.779439] mmap_region+0x1f9/0x2660 [ 28.779732] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.780032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.780521] ? __pfx_lock_acquire+0x10/0x10 [ 28.780880] ? __pfx_mmap_region+0x10/0x10 [ 28.781182] ? security_mmap_addr+0x7d/0xa0 [ 28.781495] ? get_unmapped_area+0x1f5/0x3f0 [ 28.781819] do_mmap+0x854/0xf00 [ 28.782064] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.782345] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.782659] ksys_mmap_pgoff+0x3af/0x500 [ 28.782942] do_syscall_64+0x3f/0x90 [ 28.783212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.783574] RIP: 0033:0x7fbe92c11d82 [ 28.783845] 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 [ 28.785119] RSP: 002b:00007ffdcf5a63e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.785640] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe92c11d82 [ 28.786171] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe9204b000 [ 28.786669] RBP: 00007fbe9204b000 R08: 0000000000000009 R09: 0000000000001000 [ 28.787171] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e20626ec0 [ 28.787664] R13: 00007ffdcf5a6400 R14: 00007ffdcf5a6430 R15: 00007ffdcf5a6790 [ 28.788196] [ 28.788374] [ 28.788497] Allocated by task 213: [ 28.788764] kasan_save_stack+0x22/0x50 [ 28.789058] kasan_set_track+0x25/0x30 [ 28.789340] __kasan_slab_alloc+0x59/0x70 [ 28.789636] kmem_cache_alloc+0x16b/0x370 [ 28.789972] vm_area_dup+0x20/0x160 [ 28.790250] __split_vma+0x170/0x950 [ 28.790530] split_vma+0xc6/0x110 [ 28.790786] mprotect_fixup+0x8d2/0xb30 [ 28.791078] do_mprotect_pkey+0x87e/0xd40 [ 28.791393] __x64_sys_mprotect+0x78/0xc0 [ 28.791708] do_syscall_64+0x3f/0x90 [ 28.791989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.792400] [ 28.792531] Freed by task 213: [ 28.792772] kasan_save_stack+0x22/0x50 [ 28.793064] kasan_set_track+0x25/0x30 [ 28.793371] kasan_save_free_info+0x2b/0x50 [ 28.793681] __kasan_slab_free+0x10a/0x190 [ 28.794007] kmem_cache_free+0x10d/0x4d0 [ 28.794312] rcu_core+0x8c8/0x2860 [ 28.794584] __do_softirq+0x1b7/0x7d4 [ 28.794889] [ 28.795013] Last potentially related work creation: [ 28.795371] kasan_save_stack+0x22/0x50 [ 28.795668] __kasan_record_aux_stack+0x8e/0xa0 [ 28.796061] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.796481] remove_vma+0x139/0x170 [ 28.796759] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.797088] do_vmi_munmap+0x1f1/0x2b0 [ 28.797362] __vm_munmap+0x138/0x3a0 [ 28.797641] __x64_sys_munmap+0x59/0x80 [ 28.797960] do_syscall_64+0x3f/0x90 [ 28.798227] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.798593] [ 28.798715] The buggy address belongs to the object at ffff888009bbf2b8 [ 28.798715] which belongs to the cache vm_area_struct of size 168 [ 28.799563] The buggy address is located 88 bytes inside of [ 28.799563] freed 168-byte region [ffff888009bbf2b8, ffff888009bbf360) [ 28.800392] [ 28.800519] The buggy address belongs to the physical page: [ 28.800902] page:00000000fb352a62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9bbf [ 28.801514] memcg:ffff888016628901 [ 28.801758] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.802129] page_type: 0xffffffff() [ 28.802390] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.802960] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016628901 [ 28.803494] page dumped because: kasan: bad access detected [ 28.803902] [ 28.804027] Memory state around the buggy address: [ 28.804369] ffff888009bbf200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 28.804888] ffff888009bbf280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.805394] >ffff888009bbf300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.805913] ^ [ 28.806178] ffff888009bbf380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.806676] ffff888009bbf400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.807219] ================================================================== [ 28.808212] Disabling lock debugging due to kernel taint [ 30.232066] BUG: Bad rss-counter state mm:00000000ca7fdad3 type:MM_FILEPAGES val:33 [ 30.232892] BUG: Bad rss-counter state mm:00000000ca7fdad3 type:MM_ANONPAGES val:22 [ 30.601172] BUG: Bad rss-counter state mm:00000000dc7a2d06 type:MM_FILEPAGES val:33 [ 30.602003] BUG: Bad rss-counter state mm:00000000dc7a2d06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20922' (ECDSA) to the list of known hosts. 2023/06/21 08:11:02 fuzzer started 2023/06/21 08:11:02 dialing manager at localhost:36067 2023/06/21 08:11:02 checking machine... 2023/06/21 08:11:02 checking revisions... [ 31.204916] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:11:02 testing simple program... [ 31.241169] cgroup: Unknown subsys name 'net' [ 31.273833] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program [ 40.579005] kmemleak: 69 new suspected memory leaks (see /sys/kernel/debug/kmemleak) VM DIAGNOSIS: 08:11:02 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88801598d1c0 RCX=ffffffff810ad687 RDX=ffffed1002b31a39 RSI=0000000000000008 RDI=ffff88801598d1c0 RBP=0000000000000001 RSP=ffff88801655fee8 R8 =0000000000000001 R9 =ffffed1002b31a38 R10=ffff88801598d1c7 R11=0000000000000000 R12=ffff88801598e840 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff810ad68c 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 00007f11d56ce700 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=00007f9773173080 CR3=0000000019cee000 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=2031303a31313a3830203132206e754a XMM01=5f687373203a726f727265203a5d3833 XMM02=632079746972756365732078756e694c XMM03=742064656c696146203a656d616e7962 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a31313a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=1ffffffff0ba7530 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007fa7036e5e07 RSP=ffff8880167cf648 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fa7036e5000 R11=00000000000b6a61 R12=ffff8880167cf760 R13=0000000000000000 R14=ffff888015a8b680 R15=ffff8880084c6140 RIP=ffffffff8135b960 RFL=00000216 [----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 00007fa702b53900 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=00007fa702b18008 CR3=000000001a022000 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