syzkaller login: [ 32.641361] BUG: Bad rss-counter state mm:000000007b3579c1 type:MM_FILEPAGES val:33 [ 32.642820] BUG: Bad rss-counter state mm:000000007b3579c1 type:MM_ANONPAGES val:22 [ 32.799699] ================================================================== [ 32.800798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.801941] Read of size 8 at addr ffff88800e226ed8 by task sshd/218 [ 32.802847] [ 32.803070] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.803944] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.804953] Call Trace: [ 32.805286] [ 32.805590] dump_stack_lvl+0x91/0xf0 [ 32.806083] print_report+0xcc/0x620 [ 32.806571] ? __virt_addr_valid+0x102/0x340 [ 32.807134] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.807768] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.808387] kasan_report+0xbe/0xf0 [ 32.808874] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.809526] vma_interval_tree_remove+0xc75/0xec0 [ 32.810157] vma_prepare+0xc54/0x11a0 [ 32.810657] __split_vma+0x5af/0x950 [ 32.811147] ? __pfx___split_vma+0x10/0x10 [ 32.811696] ? find_held_lock+0x2c/0x110 [ 32.812241] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.812830] ? lock_is_held_type+0x9f/0x120 [ 32.813408] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.814045] ? mtree_range_walk+0x632/0x900 [ 32.814615] ? mas_walk+0x5c7/0x7c0 [ 32.815103] do_vmi_munmap+0x1f1/0x2b0 [ 32.815614] mmap_region+0x1f9/0x2660 [ 32.816121] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.816651] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.817394] ? __pfx_lock_acquire+0x10/0x10 [ 32.817929] ? __pfx_mmap_region+0x10/0x10 [ 32.818467] ? security_mmap_addr+0x7d/0xa0 [ 32.818999] ? get_unmapped_area+0x1f5/0x3f0 [ 32.819553] do_mmap+0x854/0xf00 [ 32.819993] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.820488] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.821050] ksys_mmap_pgoff+0x3af/0x500 [ 32.821566] do_syscall_64+0x3f/0x90 [ 32.822047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.822699] RIP: 0033:0x7f28f4a31d82 [ 32.823164] 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 [ 32.825320] RSP: 002b:00007ffdf55e9f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.826262] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28f4a31d82 [ 32.827109] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28f3e6b000 [ 32.827972] RBP: 00007f28f3e6b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.828839] R10: 0000000000000812 R11: 0000000000000206 R12: 000056441f328b20 [ 32.829710] R13: 00007ffdf55e9fb0 R14: 00007ffdf55e9fe0 R15: 00007ffdf55ea340 [ 32.830575] [ 32.830866] [ 32.831086] Allocated by task 211: [ 32.831514] kasan_save_stack+0x22/0x50 [ 32.832018] kasan_set_track+0x25/0x30 [ 32.832511] __kasan_slab_alloc+0x59/0x70 [ 32.833042] kmem_cache_alloc+0x16b/0x370 [ 32.833588] vm_area_dup+0x20/0x160 [ 32.834045] __split_vma+0x170/0x950 [ 32.834516] split_vma+0xc6/0x110 [ 32.834963] mprotect_fixup+0x8d2/0xb30 [ 32.835467] do_mprotect_pkey+0x87e/0xd40 [ 32.835988] __x64_sys_mprotect+0x78/0xc0 [ 32.836509] do_syscall_64+0x3f/0x90 [ 32.836985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.837634] [ 32.837849] Freed by task 209: [ 32.838246] kasan_save_stack+0x22/0x50 [ 32.838755] kasan_set_track+0x25/0x30 [ 32.839247] kasan_save_free_info+0x2b/0x50 [ 32.839792] __kasan_slab_free+0x10a/0x190 [ 32.840340] kmem_cache_free+0x10d/0x4d0 [ 32.840862] rcu_core+0x8c8/0x2860 [ 32.841316] __do_softirq+0x1b7/0x7d4 [ 32.841816] [ 32.842032] Last potentially related work creation: [ 32.842619] kasan_save_stack+0x22/0x50 [ 32.843133] __kasan_record_aux_stack+0x8e/0xa0 [ 32.843711] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.844364] remove_vma+0x139/0x170 [ 32.844827] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.845403] do_vmi_munmap+0x1f1/0x2b0 [ 32.845895] __vm_munmap+0x138/0x3a0 [ 32.846362] __x64_sys_munmap+0x59/0x80 [ 32.846864] do_syscall_64+0x3f/0x90 [ 32.847352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.848008] [ 32.848223] Second to last potentially related work creation: [ 32.848909] kasan_save_stack+0x22/0x50 [ 32.849421] __kasan_record_aux_stack+0x8e/0xa0 [ 32.850003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.850646] remove_vma+0x139/0x170 [ 32.851109] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.851681] do_vmi_munmap+0x1f1/0x2b0 [ 32.852182] mmap_region+0x1f9/0x2660 [ 32.852669] do_mmap+0x854/0xf00 [ 32.853108] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.853622] ksys_mmap_pgoff+0x3af/0x500 [ 32.854131] do_syscall_64+0x3f/0x90 [ 32.854614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.855263] [ 32.855479] The buggy address belongs to the object at ffff88800e226e80 [ 32.855479] which belongs to the cache vm_area_struct of size 168 [ 32.856953] The buggy address is located 88 bytes inside of [ 32.856953] freed 168-byte region [ffff88800e226e80, ffff88800e226f28) [ 32.858384] [ 32.858599] The buggy address belongs to the physical page: [ 32.859259] page:00000000c0798e46 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe226 [ 32.860358] memcg:ffff88800e84e801 [ 32.860792] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.861517] page_type: 0xffffffff() [ 32.861972] raw: 0100000000000200 ffff88800879fc80 ffffea0000351680 dead000000000007 [ 32.862892] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e84e801 [ 32.863804] page dumped because: kasan: bad access detected [ 32.864472] [ 32.864696] Memory state around the buggy address: [ 32.865280] ffff88800e226d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.866156] ffff88800e226e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.867021] >ffff88800e226e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.867875] ^ [ 32.868611] ffff88800e226f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.869489] ffff88800e226f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.870341] ================================================================== [ 32.871444] Disabling lock debugging due to kernel taint [ 35.062678] BUG: Bad rss-counter state mm:000000005309c768 type:MM_FILEPAGES val:33 [ 35.063878] BUG: Bad rss-counter state mm:000000005309c768 type:MM_ANONPAGES val:22 [ 35.443235] BUG: Bad rss-counter state mm:000000003923c299 type:MM_FILEPAGES val:33 [ 35.444459] BUG: Bad rss-counter state mm:000000003923c299 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16982' (ECDSA) to the list of known hosts. 2023/06/19 18:36:25 fuzzer started 2023/06/19 18:36:25 dialing manager at localhost:44161 2023/06/19 18:36:25 checking machine... 2023/06/19 18:36:25 checking revisions... [ 36.172022] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:36:25 testing simple program... [ 36.212481] cgroup: Unknown subsys name 'net' [ 36.253867] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:36:23 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=00000000000000e1 RCX=0000000000000004 RDX=000000000000231c RSI=0000000000000000 RDI=00007ffc116521c0 RBP=00000000000000f4 RSP=fffffe0000002fd0 R8 =00007ffc11656864 R9 =00007ffc11656720 R10=00007f05a5cc7a57 R11=0000000000000000 R12=0000000000000008 R13=00007ffc116521c0 R14=00007ffc11656990 R15=0000000000000452 RIP=ffffffff84601260 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f05a5177900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc1165219c CR3=0000000016a8e000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007f02b635ce78 CR3=000000000c6d6000 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=10c5f457c8f47da4474c73167e9b6640 XMM02=000000000011f910eff9b2d0a8fce9cb XMM03=000000000011f9e02c67c8bc2e329bc3 XMM04=0aa675559839292b00000000000ae988 XMM05=0e051ca58c85698b0000000000135610 XMM06=bdf2e299e47b49d50000000000134340 XMM07=e042d86d42eb936e0000000000123870 XMM08=daaec77d8ac89b39000000000011f9e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000