syzkaller login: [ 30.601640] BUG: Bad rss-counter state mm:00000000f950dcaa type:MM_FILEPAGES val:33 [ 30.602680] BUG: Bad rss-counter state mm:00000000f950dcaa type:MM_ANONPAGES val:22 [ 30.769956] ================================================================== [ 30.770935] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.771958] Read of size 8 at addr ffff88801a37bc20 by task sshd/221 [ 30.772891] [ 30.773119] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.774031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.775083] Call Trace: [ 30.775411] [ 30.775740] dump_stack_lvl+0x91/0xf0 [ 30.776270] print_report+0xcc/0x620 [ 30.776792] ? __virt_addr_valid+0x102/0x340 [ 30.777367] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.778024] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.778684] kasan_report+0xbe/0xf0 [ 30.779176] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779849] vma_interval_tree_remove+0xc75/0xec0 [ 30.780515] vma_prepare+0xc54/0x11a0 [ 30.781018] __split_vma+0x5af/0x950 [ 30.781525] ? __pfx___split_vma+0x10/0x10 [ 30.782070] ? find_held_lock+0x2c/0x110 [ 30.782624] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.783212] ? lock_is_held_type+0x9f/0x120 [ 30.783812] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.784485] ? mtree_range_walk+0x632/0x900 [ 30.785137] ? mas_walk+0x5c7/0x7c0 [ 30.785704] do_vmi_munmap+0x1f1/0x2b0 [ 30.786280] mmap_region+0x1f9/0x2660 [ 30.786862] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.787455] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.788324] ? __pfx_lock_acquire+0x10/0x10 [ 30.788959] ? __pfx_mmap_region+0x10/0x10 [ 30.789595] ? security_mmap_addr+0x7d/0xa0 [ 30.790211] ? get_unmapped_area+0x1f5/0x3f0 [ 30.790866] do_mmap+0x854/0xf00 [ 30.791375] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.791984] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.792679] ksys_mmap_pgoff+0x3af/0x500 [ 30.793270] do_syscall_64+0x3f/0x90 [ 30.793845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.794608] RIP: 0033:0x7f451a309d82 [ 30.795136] 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 [ 30.797674] RSP: 002b:00007fff76efefc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.798744] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f451a309d82 [ 30.799765] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4519743000 [ 30.800774] RBP: 00007f4519743000 R08: 0000000000000009 R09: 0000000000001000 [ 30.801778] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac76c49f70 [ 30.802778] R13: 00007fff76efefe0 R14: 00007fff76eff010 R15: 00007fff76eff370 [ 30.803822] [ 30.804165] [ 30.804436] Allocated by task 214: [ 30.804933] kasan_save_stack+0x22/0x50 [ 30.805515] kasan_set_track+0x25/0x30 [ 30.806073] __kasan_slab_alloc+0x59/0x70 [ 30.806678] kmem_cache_alloc+0x16b/0x370 [ 30.807254] vm_area_dup+0x20/0x160 [ 30.807801] __split_vma+0x170/0x950 [ 30.808338] split_vma+0xc6/0x110 [ 30.808852] mprotect_fixup+0x8d2/0xb30 [ 30.809413] do_mprotect_pkey+0x87e/0xd40 [ 30.810018] __x64_sys_mprotect+0x78/0xc0 [ 30.810613] do_syscall_64+0x3f/0x90 [ 30.811146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812099] [ 30.812412] Freed by task 19: [ 30.812887] kasan_save_stack+0x22/0x50 [ 30.813482] kasan_set_track+0x25/0x30 [ 30.814078] kasan_save_free_info+0x2b/0x50 [ 30.814730] __kasan_slab_free+0x10a/0x190 [ 30.815340] kmem_cache_free+0x10d/0x4d0 [ 30.815980] rcu_core+0x8c8/0x2860 [ 30.816532] __do_softirq+0x1b7/0x7d4 [ 30.817090] [ 30.817338] Last potentially related work creation: [ 30.818024] kasan_save_stack+0x22/0x50 [ 30.818639] __kasan_record_aux_stack+0x8e/0xa0 [ 30.819296] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.820047] remove_vma+0x139/0x170 [ 30.820593] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.821224] do_vmi_munmap+0x1f1/0x2b0 [ 30.821798] __vm_munmap+0x138/0x3a0 [ 30.822332] __x64_sys_munmap+0x59/0x80 [ 30.822916] do_syscall_64+0x3f/0x90 [ 30.823463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.824247] [ 30.824512] The buggy address belongs to the object at ffff88801a37bbc8 [ 30.824512] which belongs to the cache vm_area_struct of size 168 [ 30.826207] The buggy address is located 88 bytes inside of [ 30.826207] freed 168-byte region [ffff88801a37bbc8, ffff88801a37bc70) [ 30.827852] [ 30.828102] The buggy address belongs to the physical page: [ 30.828903] page:000000008908a4bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a37b [ 30.830168] memcg:ffff88800ef90e01 [ 30.830667] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.831409] page_type: 0xffffffff() [ 30.831936] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.833049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef90e01 [ 30.834136] page dumped because: kasan: bad access detected [ 30.834920] [ 30.835165] Memory state around the buggy address: [ 30.835844] ffff88801a37bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.836861] ffff88801a37bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.837876] >ffff88801a37bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.838864] ^ [ 30.839479] ffff88801a37bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.840509] ffff88801a37bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.841507] ================================================================== [ 30.842693] Disabling lock debugging due to kernel taint [ 32.828869] BUG: Bad rss-counter state mm:00000000bf6381d6 type:MM_FILEPAGES val:33 [ 32.830056] BUG: Bad rss-counter state mm:00000000bf6381d6 type:MM_ANONPAGES val:22 [ 33.205488] BUG: Bad rss-counter state mm:00000000612304fd type:MM_FILEPAGES val:33 [ 33.206473] BUG: Bad rss-counter state mm:00000000612304fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54708' (ECDSA) to the list of known hosts. 2023/06/20 16:00:46 fuzzer started 2023/06/20 16:00:46 dialing manager at localhost:36067 2023/06/20 16:00:46 checking machine... 2023/06/20 16:00:46 checking revisions... [ 33.946094] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:00:46 testing simple program... [ 33.998737] cgroup: Unknown subsys name 'net' [ 34.036001] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:00:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000008 RCX=0000000000000000 RDX=ffff88800dc00000 RSI=ffffffff818e8bd0 RDI=0000000000000004 RBP=ffff88800ca48ca0 RSP=ffff88800f7dfed8 R8 =0000000000000004 R9 =0000000000000009 R10=0000000000000008 R11=0000000000000000 R12=ffff88800ca48b40 R13=ffff88800ca74500 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c089b 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 00007f8513aad900 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=00007ffca5bd3000 CR3=000000001a3e6000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f1203570670 CR3=000000000d55c000 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=f814360fe4ad25835b4c04d955ce131a XMM02=ec2efd57dc4c00df000000000011da48 XMM03=88ee7471ac735ebe000000000011db18 XMM04=bf3434e8a766646800000000000ae988 XMM05=0bb33cc16cf062a90000000000132e68 XMM06=c291bd5c70af25b90000000000131f08 XMM07=e042d86d42eb936e00000000001224d8 XMM08=88ee7471ac735ebe000000000011db18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000