syzkaller login: [ 30.254707] BUG: Bad rss-counter state mm:00000000afefa350 type:MM_FILEPAGES val:33 [ 30.255921] BUG: Bad rss-counter state mm:00000000afefa350 type:MM_ANONPAGES val:22 [ 30.298186] ================================================================== [ 30.299375] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.300474] Read of size 8 at addr ffff88800fcb7b38 by task sshd/220 [ 30.301383] [ 30.301640] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.302668] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.303820] Call Trace: [ 30.304198] [ 30.304534] dump_stack_lvl+0x91/0xf0 [ 30.305112] print_report+0xcc/0x620 [ 30.305686] ? __virt_addr_valid+0x102/0x340 [ 30.306349] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.307117] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.307793] kasan_report+0xbe/0xf0 [ 30.308277] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.308893] vma_interval_tree_remove+0xc75/0xec0 [ 30.309501] vma_prepare+0xc54/0x11a0 [ 30.309982] __split_vma+0x5af/0x950 [ 30.310464] ? __pfx___split_vma+0x10/0x10 [ 30.311001] ? find_held_lock+0x2c/0x110 [ 30.311528] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.312095] ? lock_is_held_type+0x9f/0x120 [ 30.312645] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.313256] ? mtree_range_walk+0x632/0x900 [ 30.313813] ? mas_walk+0x5c7/0x7c0 [ 30.314306] do_vmi_munmap+0x1f1/0x2b0 [ 30.314807] mmap_region+0x1f9/0x2660 [ 30.315290] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.315798] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.316513] ? __pfx_lock_acquire+0x10/0x10 [ 30.317045] ? __pfx_mmap_region+0x10/0x10 [ 30.317576] ? security_mmap_addr+0x7d/0xa0 [ 30.318120] ? get_unmapped_area+0x1f5/0x3f0 [ 30.318703] do_mmap+0x854/0xf00 [ 30.319162] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.319659] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.320228] ksys_mmap_pgoff+0x3af/0x500 [ 30.320750] do_syscall_64+0x3f/0x90 [ 30.321247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.321918] RIP: 0033:0x7f04a9741d82 [ 30.322397] 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 [ 30.324579] RSP: 002b:00007ffc20ce8c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.325520] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04a9741d82 [ 30.326392] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04a8b7b000 [ 30.327256] RBP: 00007f04a8b7b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.328139] R10: 0000000000000812 R11: 0000000000000206 R12: 000056040287dec0 [ 30.329015] R13: 00007ffc20ce8c50 R14: 00007ffc20ce8c80 R15: 00007ffc20ce8fe0 [ 30.329908] [ 30.330217] [ 30.330432] Allocated by task 213: [ 30.330893] kasan_save_stack+0x22/0x50 [ 30.331400] kasan_set_track+0x25/0x30 [ 30.331903] __kasan_slab_alloc+0x59/0x70 [ 30.332429] kmem_cache_alloc+0x16b/0x370 [ 30.332951] vm_area_dup+0x20/0x160 [ 30.333418] __split_vma+0x170/0x950 [ 30.333893] split_vma+0xc6/0x110 [ 30.334344] mprotect_fixup+0x8d2/0xb30 [ 30.334865] do_mprotect_pkey+0x87e/0xd40 [ 30.335406] __x64_sys_mprotect+0x78/0xc0 [ 30.335940] do_syscall_64+0x3f/0x90 [ 30.336427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.337093] [ 30.337320] Freed by task 213: [ 30.337726] kasan_save_stack+0x22/0x50 [ 30.338243] kasan_set_track+0x25/0x30 [ 30.338755] kasan_save_free_info+0x2b/0x50 [ 30.339311] __kasan_slab_free+0x10a/0x190 [ 30.339854] kmem_cache_free+0x10d/0x4d0 [ 30.340386] rcu_core+0x8c8/0x2860 [ 30.340844] __do_softirq+0x1b7/0x7d4 [ 30.341351] [ 30.341568] Last potentially related work creation: [ 30.342178] kasan_save_stack+0x22/0x50 [ 30.342702] __kasan_record_aux_stack+0x8e/0xa0 [ 30.343295] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.343952] remove_vma+0x139/0x170 [ 30.344410] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.344968] do_vmi_munmap+0x1f1/0x2b0 [ 30.345477] __vm_munmap+0x138/0x3a0 [ 30.345941] __x64_sys_munmap+0x59/0x80 [ 30.346447] do_syscall_64+0x3f/0x90 [ 30.346956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.347609] [ 30.347826] Second to last potentially related work creation: [ 30.348508] kasan_save_stack+0x22/0x50 [ 30.349027] __kasan_record_aux_stack+0x8e/0xa0 [ 30.349621] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.350285] remove_vma+0x139/0x170 [ 30.350769] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.351342] do_vmi_munmap+0x1f1/0x2b0 [ 30.351831] mmap_region+0x1f9/0x2660 [ 30.352310] do_mmap+0x854/0xf00 [ 30.352754] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.353252] ksys_mmap_pgoff+0x3af/0x500 [ 30.353762] do_syscall_64+0x3f/0x90 [ 30.354243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.354907] [ 30.355127] The buggy address belongs to the object at ffff88800fcb7ae0 [ 30.355127] which belongs to the cache vm_area_struct of size 168 [ 30.356628] The buggy address is located 88 bytes inside of [ 30.356628] freed 168-byte region [ffff88800fcb7ae0, ffff88800fcb7b88) [ 30.358063] [ 30.358283] The buggy address belongs to the physical page: [ 30.358959] page:00000000fa7fa361 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcb7 [ 30.360056] memcg:ffff88800da82201 [ 30.360495] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.361204] page_type: 0xffffffff() [ 30.361663] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 30.362622] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da82201 [ 30.363563] page dumped because: kasan: bad access detected [ 30.364226] [ 30.364443] Memory state around the buggy address: [ 30.365032] ffff88800fcb7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.365915] ffff88800fcb7a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.366799] >ffff88800fcb7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.367661] ^ [ 30.368276] ffff88800fcb7b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.369155] ffff88800fcb7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.370014] ================================================================== [ 30.371293] Disabling lock debugging due to kernel taint [ 32.608843] BUG: Bad rss-counter state mm:00000000f8469194 type:MM_FILEPAGES val:33 [ 32.609998] BUG: Bad rss-counter state mm:00000000f8469194 type:MM_ANONPAGES val:22 [ 33.013638] BUG: Bad rss-counter state mm:000000005b7e4b58 type:MM_FILEPAGES val:33 [ 33.014735] BUG: Bad rss-counter state mm:000000005b7e4b58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35901' (ECDSA) to the list of known hosts. 2023/06/20 15:57:27 fuzzer started 2023/06/20 15:57:27 dialing manager at localhost:36067 2023/06/20 15:57:27 checking machine... 2023/06/20 15:57:27 checking revisions... [ 33.772079] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:57:27 testing simple program... [ 33.806925] cgroup: Unknown subsys name 'net' [ 33.856713] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:57:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffd68fdbef8 CR3=0000000005482000 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=00007f427fd8e510000056287f975790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000001 RSI=ffffffff818cfa13 RDI=ffff88806cf09a78 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000241b7 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff811306ec 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 00007f49ff1b4900 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=00007fa9fa3bc650 CR3=000000000c690000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f6bb5b64b24ca8aa00000000000ae988 XMM05=834d82efe89b67050000000000134ed8 XMM06=4fda316b135da52b0000000000133cc8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000