syzkaller login: [ 44.519738] BUG: Bad rss-counter state mm:000000003fc8290b type:MM_FILEPAGES val:33 [ 44.521176] BUG: Bad rss-counter state mm:000000003fc8290b type:MM_ANONPAGES val:22 [ 44.668772] ================================================================== [ 44.669860] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.670969] Read of size 8 at addr ffff888018c61310 by task sshd/220 [ 44.672038] [ 44.672301] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.673348] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.674360] Call Trace: [ 44.674675] [ 44.674959] dump_stack_lvl+0x91/0xf0 [ 44.675444] print_report+0xcc/0x620 [ 44.675930] ? __virt_addr_valid+0x102/0x340 [ 44.676482] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.677099] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.677727] kasan_report+0xbe/0xf0 [ 44.678196] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.678806] vma_interval_tree_remove+0xc75/0xec0 [ 44.679402] vma_prepare+0xc54/0x11a0 [ 44.679878] __split_vma+0x5af/0x950 [ 44.680342] ? __pfx___split_vma+0x10/0x10 [ 44.680868] ? find_held_lock+0x2c/0x110 [ 44.681404] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.681972] ? lock_is_held_type+0x9f/0x120 [ 44.682501] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.683107] ? mtree_range_walk+0x632/0x900 [ 44.683656] ? mas_walk+0x5c7/0x7c0 [ 44.684124] do_vmi_munmap+0x1f1/0x2b0 [ 44.684616] mmap_region+0x1f9/0x2660 [ 44.685097] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.685614] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.686330] ? __pfx_lock_acquire+0x10/0x10 [ 44.686865] ? __pfx_mmap_region+0x10/0x10 [ 44.687394] ? security_mmap_addr+0x7d/0xa0 [ 44.687925] ? get_unmapped_area+0x1f5/0x3f0 [ 44.688467] do_mmap+0x854/0xf00 [ 44.688909] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.689419] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.689972] ksys_mmap_pgoff+0x3af/0x500 [ 44.690476] do_syscall_64+0x3f/0x90 [ 44.690945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.691586] RIP: 0033:0x7f9b4d4e2d82 [ 44.692038] 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 [ 44.694168] RSP: 002b:00007ffc4f912168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.695074] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b4d4e2d82 [ 44.695916] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b4c91c000 [ 44.696750] RBP: 00007f9b4c91c000 R08: 0000000000000009 R09: 0000000000001000 [ 44.697600] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610f5933b20 [ 44.698437] R13: 00007ffc4f912180 R14: 00007ffc4f9121b0 R15: 00007ffc4f912510 [ 44.699289] [ 44.699581] [ 44.699794] Allocated by task 213: [ 44.700225] kasan_save_stack+0x22/0x50 [ 44.700729] kasan_set_track+0x25/0x30 [ 44.701216] __kasan_slab_alloc+0x59/0x70 [ 44.701761] kmem_cache_alloc+0x16b/0x370 [ 44.702284] vm_area_dup+0x20/0x160 [ 44.702737] __split_vma+0x170/0x950 [ 44.703208] split_vma+0xc6/0x110 [ 44.703644] mprotect_fixup+0x8d2/0xb30 [ 44.704146] do_mprotect_pkey+0x87e/0xd40 [ 44.704687] __x64_sys_mprotect+0x78/0xc0 [ 44.705239] do_syscall_64+0x3f/0x90 [ 44.705821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.706595] [ 44.706856] Freed by task 213: [ 44.707337] kasan_save_stack+0x22/0x50 [ 44.707945] kasan_set_track+0x25/0x30 [ 44.708536] kasan_save_free_info+0x2b/0x50 [ 44.709168] __kasan_slab_free+0x10a/0x190 [ 44.709826] kmem_cache_free+0x10d/0x4d0 [ 44.710443] rcu_core+0x8c8/0x2860 [ 44.710982] __do_softirq+0x1b7/0x7d4 [ 44.711576] [ 44.711833] Last potentially related work creation: [ 44.712546] kasan_save_stack+0x22/0x50 [ 44.713216] __kasan_record_aux_stack+0x8e/0xa0 [ 44.713927] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.714705] remove_vma+0x139/0x170 [ 44.715248] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.715923] do_vmi_munmap+0x1f1/0x2b0 [ 44.716509] __vm_munmap+0x138/0x3a0 [ 44.717077] __x64_sys_munmap+0x59/0x80 [ 44.717683] do_syscall_64+0x3f/0x90 [ 44.718257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.719031] [ 44.719292] The buggy address belongs to the object at ffff888018c612b8 [ 44.719292] which belongs to the cache vm_area_struct of size 168 [ 44.721098] The buggy address is located 88 bytes inside of [ 44.721098] freed 168-byte region [ffff888018c612b8, ffff888018c61360) [ 44.722826] [ 44.723091] The buggy address belongs to the physical page: [ 44.723893] page:0000000023a6f85f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c61 [ 44.725202] memcg:ffff888018c66f01 [ 44.725726] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.726523] page_type: 0xffffffff() [ 44.727066] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.728185] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c66f01 [ 44.729301] page dumped because: kasan: bad access detected [ 44.730116] [ 44.730377] Memory state around the buggy address: [ 44.731080] ffff888018c61200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 44.732130] ffff888018c61280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 44.733167] >ffff888018c61300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 44.734215] ^ [ 44.734775] ffff888018c61380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 44.735829] ffff888018c61400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 44.736877] ================================================================== [ 44.737989] Disabling lock debugging due to kernel taint [ 46.722325] BUG: Bad rss-counter state mm:000000009bb157d1 type:MM_FILEPAGES val:33 [ 46.723363] BUG: Bad rss-counter state mm:000000009bb157d1 type:MM_ANONPAGES val:22 [ 47.278615] BUG: Bad rss-counter state mm:0000000073245c01 type:MM_FILEPAGES val:33 [ 47.279784] BUG: Bad rss-counter state mm:0000000073245c01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37899' (ECDSA) to the list of known hosts. 2023/06/20 00:43:05 fuzzer started 2023/06/20 00:43:06 dialing manager at localhost:44161 2023/06/20 00:43:06 checking machine... 2023/06/20 00:43:06 checking revisions... [ 47.921450] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:43:06 testing simple program... [ 47.971705] cgroup: Unknown subsys name 'net' [ 48.012825] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:42:51 Registers: info registers vcpu 0 RAX=ffffffff864b19c1 RBX=0000000000000001 RCX=ffffffff864b19bc RDX=0000000000000000 RSI=1ffffffff0c96338 RDI=ffffffff8604e26c RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b19b0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b53a6 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 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=00007f971ce48040 CR3=000000000caf6000 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=2035303a33343a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a33343a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9e1325 RSP=ffff88806cf09918 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff88800dc83200 RIP=ffffffff812d86a2 RFL=00000247 [---Z-PC] 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 00007f47e23c6900 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=00007ffce545a000 CR3=000000000cd00000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000