syzkaller login: [ 42.350805] BUG: Bad rss-counter state mm:0000000080866b0a type:MM_FILEPAGES val:33 [ 42.352687] BUG: Bad rss-counter state mm:0000000080866b0a type:MM_ANONPAGES val:22 [ 42.523102] ================================================================== [ 42.524110] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.525172] Read of size 8 at addr ffff888019f60b38 by task sshd/221 [ 42.526115] [ 42.526352] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.527288] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.528390] Call Trace: [ 42.528742] [ 42.529055] dump_stack_lvl+0x91/0xf0 [ 42.529586] print_report+0xcc/0x620 [ 42.530112] ? __virt_addr_valid+0x102/0x340 [ 42.530726] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.531415] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.532090] kasan_report+0xbe/0xf0 [ 42.532629] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.533308] vma_interval_tree_remove+0xc75/0xec0 [ 42.533956] vma_prepare+0xc54/0x11a0 [ 42.534484] __split_vma+0x5af/0x950 [ 42.534996] ? __pfx___split_vma+0x10/0x10 [ 42.535572] ? find_held_lock+0x2c/0x110 [ 42.536144] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.536767] ? lock_is_held_type+0x9f/0x120 [ 42.537344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.538004] ? mtree_range_walk+0x632/0x900 [ 42.538603] ? mas_walk+0x5c7/0x7c0 [ 42.539117] do_vmi_munmap+0x1f1/0x2b0 [ 42.539665] mmap_region+0x1f9/0x2660 [ 42.540206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.540798] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.541598] ? __pfx_lock_acquire+0x10/0x10 [ 42.542199] ? __pfx_mmap_region+0x10/0x10 [ 42.542808] ? security_mmap_addr+0x7d/0xa0 [ 42.543403] ? get_unmapped_area+0x1f5/0x3f0 [ 42.544021] do_mmap+0x854/0xf00 [ 42.544537] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.545094] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.545731] ksys_mmap_pgoff+0x3af/0x500 [ 42.546303] do_syscall_64+0x3f/0x90 [ 42.546839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.547563] RIP: 0033:0x7eff82e34d82 [ 42.548080] 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 [ 42.550467] RSP: 002b:00007ffe1cedc968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.551482] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff82e34d82 [ 42.552441] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff8226e000 [ 42.553381] RBP: 00007eff8226e000 R08: 0000000000000009 R09: 0000000000001000 [ 42.554329] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc91c5fec0 [ 42.555276] R13: 00007ffe1cedc980 R14: 00007ffe1cedc9b0 R15: 00007ffe1cedcd10 [ 42.556239] [ 42.556592] [ 42.556832] Allocated by task 214: [ 42.557314] kasan_save_stack+0x22/0x50 [ 42.557885] kasan_set_track+0x25/0x30 [ 42.558440] __kasan_slab_alloc+0x59/0x70 [ 42.559028] kmem_cache_alloc+0x16b/0x370 [ 42.559606] vm_area_dup+0x20/0x160 [ 42.560120] __split_vma+0x170/0x950 [ 42.560649] split_vma+0xc6/0x110 [ 42.561146] mprotect_fixup+0x8d2/0xb30 [ 42.561717] do_mprotect_pkey+0x87e/0xd40 [ 42.562305] __x64_sys_mprotect+0x78/0xc0 [ 42.562885] do_syscall_64+0x3f/0x90 [ 42.563409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.564121] [ 42.564378] Freed by task 214: [ 42.564821] kasan_save_stack+0x22/0x50 [ 42.565382] kasan_set_track+0x25/0x30 [ 42.565932] kasan_save_free_info+0x2b/0x50 [ 42.566522] __kasan_slab_free+0x10a/0x190 [ 42.567116] kmem_cache_free+0x10d/0x4d0 [ 42.567680] rcu_core+0x8c8/0x2860 [ 42.568174] __do_softirq+0x1b7/0x7d4 [ 42.568709] [ 42.568948] Last potentially related work creation: [ 42.569595] kasan_save_stack+0x22/0x50 [ 42.570167] __kasan_record_aux_stack+0x8e/0xa0 [ 42.570800] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.571509] remove_vma+0x139/0x170 [ 42.572017] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.572647] do_vmi_munmap+0x1f1/0x2b0 [ 42.573185] __vm_munmap+0x138/0x3a0 [ 42.573700] __x64_sys_munmap+0x59/0x80 [ 42.574254] do_syscall_64+0x3f/0x90 [ 42.574777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.575495] [ 42.575732] The buggy address belongs to the object at ffff888019f60ae0 [ 42.575732] which belongs to the cache vm_area_struct of size 168 [ 42.577387] The buggy address is located 88 bytes inside of [ 42.577387] freed 168-byte region [ffff888019f60ae0, ffff888019f60b88) [ 42.578932] [ 42.579168] The buggy address belongs to the physical page: [ 42.579889] page:00000000a2b59817 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f60 [ 42.581097] memcg:ffff888016f49f01 [ 42.581564] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.582275] page_type: 0xffffffff() [ 42.582775] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.583784] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f49f01 [ 42.584796] page dumped because: kasan: bad access detected [ 42.585521] [ 42.585757] Memory state around the buggy address: [ 42.586396] ffff888019f60a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.587349] ffff888019f60a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 42.588310] >ffff888019f60b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.589251] ^ [ 42.589920] ffff888019f60b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 42.590860] ffff888019f60c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 42.591800] ================================================================== [ 42.593041] Disabling lock debugging due to kernel taint [ 44.948759] BUG: Bad rss-counter state mm:0000000000de36b0 type:MM_FILEPAGES val:33 [ 44.949821] BUG: Bad rss-counter state mm:0000000000de36b0 type:MM_ANONPAGES val:22 [ 45.502072] BUG: Bad rss-counter state mm:0000000065b9f36c type:MM_FILEPAGES val:33 [ 45.503241] BUG: Bad rss-counter state mm:0000000065b9f36c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51188' (ECDSA) to the list of known hosts. 2023/06/20 03:11:13 fuzzer started 2023/06/20 03:11:13 dialing manager at localhost:44161 2023/06/20 03:11:13 checking machine... 2023/06/20 03:11:13 checking revisions... [ 46.150830] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:11:13 testing simple program... [ 46.206160] cgroup: Unknown subsys name 'net' [ 46.258499] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:10:59 Registers: info registers vcpu 0 RAX=00000000dead4ead RBX=ffff88800e2e8ab0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800e2e8ab4 RBP=1ffff11002c57f93 RSP=ffff8880162bfc90 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6cb2 R12=0000000000000202 R13=ffff88800e2e8af0 R14=ffffffff813782a8 R15=ffff888018c13180 RIP=ffffffff812e004a 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 00007facab483900 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=00007facaba38650 CR3=000000000d8ca000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09e68 RCX=0000000000000002 RDX=1ffff1100d9e1355 RSI=ffff88806cf09e58 RDI=ffff88806cf09aa8 RBP=ffff88806cf02000 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e58 R15=ffff88806cf09a98 RIP=ffffffff81131ca6 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 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=00007f2d0a3999a0 CR3=0000000013a0c000 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=51e860068717bab9494772441dfdb808 XMM02=ec2efd57dc4c00df000000000011c6d0 XMM03=0f6b530c58361c68000000000011c7a0 XMM04=dad4edc3bd50910600000000000ae988 XMM05=e4cb8bb95a7664b600000000001336d8 XMM06=8bc2d5b09c912d590000000000132540 XMM07=e042d86d42eb936e0000000000123df8 XMM08=0f6b530c58361c68000000000011c7a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000