syzkaller login: [ 31.609642] BUG: Bad rss-counter state mm:0000000019a2ae18 type:MM_FILEPAGES val:33 [ 31.610843] BUG: Bad rss-counter state mm:0000000019a2ae18 type:MM_ANONPAGES val:22 [ 31.724949] ================================================================== [ 31.725870] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.726958] Read of size 8 at addr ffff88800d395798 by task sshd/220 [ 31.727733] [ 31.727955] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.728864] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.729954] Call Trace: [ 31.730271] [ 31.730553] dump_stack_lvl+0x91/0xf0 [ 31.731037] print_report+0xcc/0x620 [ 31.731548] ? __virt_addr_valid+0x102/0x340 [ 31.732181] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.733017] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.733660] kasan_report+0xbe/0xf0 [ 31.734250] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.734870] vma_interval_tree_remove+0xc75/0xec0 [ 31.735486] vma_prepare+0xc54/0x11a0 [ 31.736078] __split_vma+0x5af/0x950 [ 31.736550] ? __pfx___split_vma+0x10/0x10 [ 31.737085] ? find_held_lock+0x2c/0x110 [ 31.737673] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.738275] ? lock_is_held_type+0x9f/0x120 [ 31.738814] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.739438] ? mtree_range_walk+0x632/0x900 [ 31.739994] ? mas_walk+0x5c7/0x7c0 [ 31.740468] do_vmi_munmap+0x1f1/0x2b0 [ 31.740957] mmap_region+0x1f9/0x2660 [ 31.741439] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.741949] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.742659] ? __pfx_lock_acquire+0x10/0x10 [ 31.743188] ? __pfx_mmap_region+0x10/0x10 [ 31.743730] ? security_mmap_addr+0x7d/0xa0 [ 31.744260] ? get_unmapped_area+0x1f5/0x3f0 [ 31.744811] do_mmap+0x854/0xf00 [ 31.745251] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.745746] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.746309] ksys_mmap_pgoff+0x3af/0x500 [ 31.746813] do_syscall_64+0x3f/0x90 [ 31.747311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.747957] RIP: 0033:0x7f0aac500d82 [ 31.748409] 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 [ 31.750520] RSP: 002b:00007ffe48cb4518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.751439] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0aac500d82 [ 31.752291] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0aab93a000 [ 31.753132] RBP: 00007f0aab93a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.753983] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563762ee2d90 [ 31.754851] R13: 00007ffe48cb4530 R14: 00007ffe48cb4560 R15: 00007ffe48cb48c0 [ 31.755747] [ 31.756044] [ 31.756263] Allocated by task 213: [ 31.756697] kasan_save_stack+0x22/0x50 [ 31.757203] kasan_set_track+0x25/0x30 [ 31.757700] __kasan_slab_alloc+0x59/0x70 [ 31.758224] kmem_cache_alloc+0x16b/0x370 [ 31.758736] vm_area_dup+0x20/0x160 [ 31.759190] __split_vma+0x170/0x950 [ 31.759666] split_vma+0xc6/0x110 [ 31.760105] mprotect_fixup+0x8d2/0xb30 [ 31.760614] do_mprotect_pkey+0x87e/0xd40 [ 31.761132] __x64_sys_mprotect+0x78/0xc0 [ 31.761656] do_syscall_64+0x3f/0x90 [ 31.762126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.762780] [ 31.762994] Freed by task 210: [ 31.763406] kasan_save_stack+0x22/0x50 [ 31.763911] kasan_set_track+0x25/0x30 [ 31.764412] kasan_save_free_info+0x2b/0x50 [ 31.764942] __kasan_slab_free+0x10a/0x190 [ 31.765474] kmem_cache_free+0x10d/0x4d0 [ 31.765986] rcu_core+0x8c8/0x2860 [ 31.766433] __do_softirq+0x1b7/0x7d4 [ 31.766907] [ 31.767121] Last potentially related work creation: [ 31.767726] kasan_save_stack+0x22/0x50 [ 31.768229] __kasan_record_aux_stack+0x8e/0xa0 [ 31.768800] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.769440] remove_vma+0x139/0x170 [ 31.769890] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.770448] do_vmi_munmap+0x1f1/0x2b0 [ 31.770932] __vm_munmap+0x138/0x3a0 [ 31.771413] __x64_sys_munmap+0x59/0x80 [ 31.771906] do_syscall_64+0x3f/0x90 [ 31.772382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.773030] [ 31.773248] Second to last potentially related work creation: [ 31.774015] kasan_save_stack+0x22/0x50 [ 31.774519] __kasan_record_aux_stack+0x8e/0xa0 [ 31.775092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.775746] remove_vma+0x139/0x170 [ 31.776195] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.776748] do_vmi_munmap+0x1f1/0x2b0 [ 31.777236] mmap_region+0x1f9/0x2660 [ 31.777721] do_mmap+0x854/0xf00 [ 31.778160] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.778658] ksys_mmap_pgoff+0x3af/0x500 [ 31.779166] do_syscall_64+0x3f/0x90 [ 31.779654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.780294] [ 31.780509] The buggy address belongs to the object at ffff88800d395740 [ 31.780509] which belongs to the cache vm_area_struct of size 168 [ 31.782001] The buggy address is located 88 bytes inside of [ 31.782001] freed 168-byte region [ffff88800d395740, ffff88800d3957e8) [ 31.783429] [ 31.783646] The buggy address belongs to the physical page: [ 31.784306] page:00000000be18091f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd395 [ 31.785400] memcg:ffff88800ecab401 [ 31.785831] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.786538] page_type: 0xffffffff() [ 31.786988] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.787924] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecab401 [ 31.788826] page dumped because: kasan: bad access detected [ 31.789496] [ 31.789712] Memory state around the buggy address: [ 31.790300] ffff88800d395680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.791152] ffff88800d395700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.792024] >ffff88800d395780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.792901] ^ [ 31.793405] ffff88800d395800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.794257] ffff88800d395880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.795109] ================================================================== [ 31.796130] Disabling lock debugging due to kernel taint [ 34.470809] BUG: Bad rss-counter state mm:000000004f42e448 type:MM_FILEPAGES val:33 [ 34.472220] BUG: Bad rss-counter state mm:000000004f42e448 type:MM_ANONPAGES val:22 [ 34.952362] BUG: Bad rss-counter state mm:00000000acb0e97f type:MM_FILEPAGES val:33 [ 34.953490] BUG: Bad rss-counter state mm:00000000acb0e97f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38542' (ECDSA) to the list of known hosts. 2023/06/20 20:40:57 fuzzer started 2023/06/20 20:40:57 dialing manager at localhost:36067 2023/06/20 20:40:57 checking machine... 2023/06/20 20:40:57 checking revisions... [ 35.716766] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:40:58 testing simple program... [ 35.762833] cgroup: Unknown subsys name 'net' [ 35.818346] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:40:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800d97f600 RCX=ffffffff860d8256 RDX=1ffff11001b2fe9b RSI=0000000000000000 RDI=ffff88800d97f4d8 RBP=ffff88800d978000 RSP=ffff88800d97f458 R8 =ffffffff860d825a R9 =ffff88800d97f508 R10=0000000000038001 R11=0000000000010b8d R12=ffff88800d97f528 R13=ffff88800d97f510 R14=ffff88800d97f600 R15=ffff88800d97f4c8 RIP=ffffffff81131cac 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 00007fdf0d268900 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=00007fdf0c6dd5d0 CR3=000000000ca98000 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=8238b64f3955262300000000000ae988 XMM05=010e12d4f937a2700000000000133d40 XMM06=e4cb8bb95a7664b60000000000132ea8 XMM07=fb795ef6d65770560000000000121cf0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81806333 RBP=ffffffff81806333 RSP=ffff88800dab7c48 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=ffff88800844f780 R13=ffffea00003bec40 R14=0000000000000000 R15=0000000000000003 RIP=ffffffff815342ab 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 00007fdae0263900 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=00007fdae081a618 CR3=000000000ca1c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000