syzkaller login: [ 31.203474] BUG: Bad rss-counter state mm:0000000064c6328f type:MM_FILEPAGES val:33 [ 31.205200] BUG: Bad rss-counter state mm:0000000064c6328f type:MM_ANONPAGES val:22 [ 31.355763] ================================================================== [ 31.356824] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.357948] Read of size 8 at addr ffff88800d9e2ed8 by task sshd/220 [ 31.358984] [ 31.359193] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.360005] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.360926] Call Trace: [ 31.361229] [ 31.361499] dump_stack_lvl+0x91/0xf0 [ 31.361966] print_report+0xcc/0x620 [ 31.362444] ? __virt_addr_valid+0x102/0x340 [ 31.362976] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.363562] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.364147] kasan_report+0xbe/0xf0 [ 31.364603] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.365190] vma_interval_tree_remove+0xc75/0xec0 [ 31.365793] vma_prepare+0xc54/0x11a0 [ 31.366267] __split_vma+0x5af/0x950 [ 31.366741] ? __pfx___split_vma+0x10/0x10 [ 31.367274] ? find_held_lock+0x2c/0x110 [ 31.367804] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.368365] ? lock_is_held_type+0x9f/0x120 [ 31.368914] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.369525] ? mtree_range_walk+0x632/0x900 [ 31.370090] ? mas_walk+0x5c7/0x7c0 [ 31.370559] do_vmi_munmap+0x1f1/0x2b0 [ 31.371046] mmap_region+0x1f9/0x2660 [ 31.371517] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.372028] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.372744] ? __pfx_lock_acquire+0x10/0x10 [ 31.373276] ? __pfx_mmap_region+0x10/0x10 [ 31.373811] ? security_mmap_addr+0x7d/0xa0 [ 31.374343] ? get_unmapped_area+0x1f5/0x3f0 [ 31.374892] do_mmap+0x854/0xf00 [ 31.375327] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.375826] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.376388] ksys_mmap_pgoff+0x3af/0x500 [ 31.376903] do_syscall_64+0x3f/0x90 [ 31.377376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.378027] RIP: 0033:0x7f82bcffcd82 [ 31.378489] 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 [ 31.380608] RSP: 002b:00007ffddaabf8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.381515] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82bcffcd82 [ 31.382383] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82bc436000 [ 31.383235] RBP: 00007f82bc436000 R08: 0000000000000009 R09: 0000000000001000 [ 31.384081] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564aa5386d90 [ 31.384915] R13: 00007ffddaabf8d0 R14: 00007ffddaabf900 R15: 00007ffddaabfc60 [ 31.385777] [ 31.386070] [ 31.386279] Allocated by task 213: [ 31.386705] kasan_save_stack+0x22/0x50 [ 31.387209] kasan_set_track+0x25/0x30 [ 31.387706] __kasan_slab_alloc+0x59/0x70 [ 31.388235] kmem_cache_alloc+0x16b/0x370 [ 31.388761] vm_area_dup+0x20/0x160 [ 31.389212] __split_vma+0x170/0x950 [ 31.389680] split_vma+0xc6/0x110 [ 31.390141] mprotect_fixup+0x8d2/0xb30 [ 31.390643] do_mprotect_pkey+0x87e/0xd40 [ 31.391159] __x64_sys_mprotect+0x78/0xc0 [ 31.391689] do_syscall_64+0x3f/0x90 [ 31.392168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.392812] [ 31.393025] Freed by task 213: [ 31.393413] kasan_save_stack+0x22/0x50 [ 31.393924] kasan_set_track+0x25/0x30 [ 31.394425] kasan_save_free_info+0x2b/0x50 [ 31.394957] __kasan_slab_free+0x10a/0x190 [ 31.395490] kmem_cache_free+0x10d/0x4d0 [ 31.395999] rcu_core+0x8c8/0x2860 [ 31.396439] __do_softirq+0x1b7/0x7d4 [ 31.396915] [ 31.397132] Last potentially related work creation: [ 31.397726] kasan_save_stack+0x22/0x50 [ 31.398242] __kasan_record_aux_stack+0x8e/0xa0 [ 31.398824] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.399462] remove_vma+0x139/0x170 [ 31.399984] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.400529] do_vmi_munmap+0x1f1/0x2b0 [ 31.401010] __vm_munmap+0x138/0x3a0 [ 31.401473] __x64_sys_munmap+0x59/0x80 [ 31.401967] do_syscall_64+0x3f/0x90 [ 31.402457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.403102] [ 31.403321] The buggy address belongs to the object at ffff88800d9e2e80 [ 31.403321] which belongs to the cache vm_area_struct of size 168 [ 31.404778] The buggy address is located 88 bytes inside of [ 31.404778] freed 168-byte region [ffff88800d9e2e80, ffff88800d9e2f28) [ 31.406177] [ 31.406395] The buggy address belongs to the physical page: [ 31.407056] page:0000000084b2dc5b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9e2 [ 31.408130] memcg:ffff8880181e9f01 [ 31.408553] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.409199] page_type: 0xffffffff() [ 31.409654] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.410581] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880181e9f01 [ 31.411492] page dumped because: kasan: bad access detected [ 31.412159] [ 31.412375] Memory state around the buggy address: [ 31.412965] ffff88800d9e2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.413820] ffff88800d9e2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.414711] >ffff88800d9e2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.415566] ^ [ 31.416297] ffff88800d9e2f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.417135] ffff88800d9e2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.418039] ================================================================== [ 31.418973] Disabling lock debugging due to kernel taint [ 34.187312] BUG: Bad rss-counter state mm:00000000cabc5d7c type:MM_FILEPAGES val:33 [ 34.188671] BUG: Bad rss-counter state mm:00000000cabc5d7c type:MM_ANONPAGES val:22 [ 34.547991] BUG: Bad rss-counter state mm:00000000acd2bf87 type:MM_FILEPAGES val:33 [ 34.548739] BUG: Bad rss-counter state mm:00000000acd2bf87 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29135' (ECDSA) to the list of known hosts. 2023/06/21 06:50:01 fuzzer started 2023/06/21 06:50:01 dialing manager at localhost:36067 2023/06/21 06:50:01 checking machine... 2023/06/21 06:50:01 checking revisions... [ 35.238737] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:50:01 testing simple program... [ 35.293382] cgroup: Unknown subsys name 'net' [ 35.378138] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:50:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff11001ad0ed8 RCX=ffffffff8124c139 RDX=1ffff1100d9c7410 RSI=0000000000000000 RDI=ffff88806ce39518 RBP=ffff8880164c8000 RSP=ffff88800d687678 R8 =ffff88806ce39518 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000087 R13=ffff8880164c8910 R14=ffff8880164c8014 R15=ffff88806ce39500 RIP=ffffffff812c2144 RFL=00000086 [--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 00007f3bf8b43900 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=00007f3bf7fc9470 CR3=0000000014580000 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=21414f6725c4316500000000000ae988 XMM05=3631fa94430249ef00000000001322b0 XMM06=19e9129bd510f23500000000001313f8 XMM07=fb795ef6d65770560000000000121580 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800c1102c2 RBX=1ffff1100194bf5b RCX=0000000000000000 RDX=ffff88800d6951c0 RSI=ffffffff844f7ebe RDI=0000000000000007 RBP=ffff88800ca5faf8 RSP=ffff88800ca5fa90 R8 =0000000000000007 R9 =000000000000003f R10=0000000000000012 R11=00000000000b6a61 R12=ffff888008f7a798 R13=dffffc0000000000 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff844f84bc 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 00007f0e6b550900 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=00007ffd59f7d000 CR3=000000000e01a000 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