syzkaller login: [ 41.855138] BUG: Bad rss-counter state mm:00000000b381bc16 type:MM_FILEPAGES val:33 [ 41.856148] BUG: Bad rss-counter state mm:00000000b381bc16 type:MM_ANONPAGES val:22 [ 41.996847] ================================================================== [ 41.997951] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.999088] Read of size 8 at addr ffff88800d63b4e0 by task sshd/220 [ 41.999997] [ 42.000383] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.001410] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.002680] Call Trace: [ 42.003070] [ 42.003409] dump_stack_lvl+0x91/0xf0 [ 42.003988] print_report+0xcc/0x620 [ 42.004564] ? __virt_addr_valid+0x102/0x340 [ 42.005215] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.005943] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.006719] kasan_report+0xbe/0xf0 [ 42.007311] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.008081] vma_interval_tree_remove+0xc75/0xec0 [ 42.008824] vma_prepare+0xc54/0x11a0 [ 42.009422] __split_vma+0x5af/0x950 [ 42.010006] ? __pfx___split_vma+0x10/0x10 [ 42.010697] ? find_held_lock+0x2c/0x110 [ 42.011271] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.011833] ? lock_is_held_type+0x9f/0x120 [ 42.012371] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.012976] ? mtree_range_walk+0x632/0x900 [ 42.013520] ? mas_walk+0x5c7/0x7c0 [ 42.013998] do_vmi_munmap+0x1f1/0x2b0 [ 42.014488] mmap_region+0x1f9/0x2660 [ 42.014990] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.015499] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.016208] ? __pfx_lock_acquire+0x10/0x10 [ 42.016741] ? __pfx_mmap_region+0x10/0x10 [ 42.017272] ? security_mmap_addr+0x7d/0xa0 [ 42.017798] ? get_unmapped_area+0x1f5/0x3f0 [ 42.018344] do_mmap+0x854/0xf00 [ 42.018789] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.019282] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.019843] ksys_mmap_pgoff+0x3af/0x500 [ 42.020347] do_syscall_64+0x3f/0x90 [ 42.020821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.021466] RIP: 0033:0x7f156ebf0d82 [ 42.021922] 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 [ 42.024065] RSP: 002b:00007ffc6299eb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.024962] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f156ebf0d82 [ 42.025811] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f156e02a000 [ 42.026680] RBP: 00007f156e02a000 R08: 0000000000000009 R09: 0000000000001000 [ 42.027531] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b05b54ec0 [ 42.028382] R13: 00007ffc6299eb80 R14: 00007ffc6299ebb0 R15: 00007ffc6299ef10 [ 42.029235] [ 42.029532] [ 42.029750] Allocated by task 213: [ 42.030186] kasan_save_stack+0x22/0x50 [ 42.030729] kasan_set_track+0x25/0x30 [ 42.031219] __kasan_slab_alloc+0x59/0x70 [ 42.031762] kmem_cache_alloc+0x16b/0x370 [ 42.032280] vm_area_dup+0x20/0x160 [ 42.032744] __split_vma+0x170/0x950 [ 42.033211] split_vma+0xc6/0x110 [ 42.033654] mprotect_fixup+0x8d2/0xb30 [ 42.034155] do_mprotect_pkey+0x87e/0xd40 [ 42.034689] __x64_sys_mprotect+0x78/0xc0 [ 42.035225] do_syscall_64+0x3f/0x90 [ 42.035696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.036335] [ 42.036549] Freed by task 213: [ 42.036941] kasan_save_stack+0x22/0x50 [ 42.037442] kasan_set_track+0x25/0x30 [ 42.037932] kasan_save_free_info+0x2b/0x50 [ 42.038467] __kasan_slab_free+0x10a/0x190 [ 42.039014] kmem_cache_free+0x10d/0x4d0 [ 42.039520] rcu_core+0x8c8/0x2860 [ 42.039960] __do_softirq+0x1b7/0x7d4 [ 42.040432] [ 42.040647] Last potentially related work creation: [ 42.041242] kasan_save_stack+0x22/0x50 [ 42.041801] __kasan_record_aux_stack+0x8e/0xa0 [ 42.042369] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.043022] remove_vma+0x139/0x170 [ 42.043474] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.044032] do_vmi_munmap+0x1f1/0x2b0 [ 42.044511] __vm_munmap+0x138/0x3a0 [ 42.044982] __x64_sys_munmap+0x59/0x80 [ 42.045474] do_syscall_64+0x3f/0x90 [ 42.045948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.046587] [ 42.046801] Second to last potentially related work creation: [ 42.047473] kasan_save_stack+0x22/0x50 [ 42.047977] __kasan_record_aux_stack+0x8e/0xa0 [ 42.048544] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.049177] remove_vma+0x139/0x170 [ 42.049627] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.050176] do_vmi_munmap+0x1f1/0x2b0 [ 42.050681] mmap_region+0x1f9/0x2660 [ 42.051159] do_mmap+0x854/0xf00 [ 42.051592] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.052079] ksys_mmap_pgoff+0x7d/0x500 [ 42.052564] do_syscall_64+0x3f/0x90 [ 42.053034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.053689] [ 42.053909] The buggy address belongs to the object at ffff88800d63b488 [ 42.053909] which belongs to the cache vm_area_struct of size 168 [ 42.055378] The buggy address is located 88 bytes inside of [ 42.055378] freed 168-byte region [ffff88800d63b488, ffff88800d63b530) [ 42.056770] [ 42.056988] The buggy address belongs to the physical page: [ 42.057650] page:00000000e6cbb3d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd63b [ 42.058746] memcg:ffff88800e27fe01 [ 42.059173] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.059877] page_type: 0xffffffff() [ 42.060326] raw: 0100000000000200 ffff88800879fc80 ffffea000039a7c0 dead000000000003 [ 42.061241] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e27fe01 [ 42.062147] page dumped because: kasan: bad access detected [ 42.062817] [ 42.063030] Memory state around the buggy address: [ 42.063612] ffff88800d63b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 42.064483] ffff88800d63b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 42.065340] >ffff88800d63b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.066177] ^ [ 42.066926] ffff88800d63b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 42.067771] ffff88800d63b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.068608] ================================================================== [ 42.069616] Disabling lock debugging due to kernel taint [ 44.314533] BUG: Bad rss-counter state mm:00000000c2ef6819 type:MM_FILEPAGES val:33 [ 44.315826] BUG: Bad rss-counter state mm:00000000c2ef6819 type:MM_ANONPAGES val:22 [ 44.868413] BUG: Bad rss-counter state mm:0000000011f7a652 type:MM_FILEPAGES val:33 [ 44.869547] BUG: Bad rss-counter state mm:0000000011f7a652 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56788' (ECDSA) to the list of known hosts. 2023/06/19 23:45:46 fuzzer started 2023/06/19 23:45:46 dialing manager at localhost:44161 2023/06/19 23:45:46 checking machine... 2023/06/19 23:45:46 checking revisions... [ 45.519567] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:45:47 testing simple program... [ 45.575459] cgroup: Unknown subsys name 'net' [ 45.631398] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:45:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880102716c0 RCX=0000000000000000 RDX=1ffff1100204e2db RSI=ffffffff810b597b RDI=ffff8880102716d8 RBP=0000000000000001 RSP=ffff88800d657e20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000007 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff810b59a6 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 00007f544d6a1900 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=00007f544cac4cf0 CR3=000000000eec6000 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=2036343a35343a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a35343a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=00007fa86c3b8d77 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007fa86c3b8d77 RSP=ffff88800d997a48 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fa86c3b8000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888019a49b40 R15=dffffc0000000000 RIP=ffffffff811fc73d RFL=00000202 [-------] 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 00007fa86bed1900 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=00007ffe216f0000 CR3=000000000ea96000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000