syzkaller login: [ 30.684785] BUG: Bad rss-counter state mm:000000004bedcb7f type:MM_FILEPAGES val:33 [ 30.686246] BUG: Bad rss-counter state mm:000000004bedcb7f type:MM_ANONPAGES val:22 [ 30.850970] ================================================================== [ 30.851909] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.852854] Read of size 8 at addr ffff88800ef28140 by task sshd/220 [ 30.853769] [ 30.853987] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.854867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.855848] Call Trace: [ 30.856171] [ 30.856462] dump_stack_lvl+0x91/0xf0 [ 30.856958] print_report+0xcc/0x620 [ 30.857444] ? __virt_addr_valid+0x102/0x340 [ 30.858016] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.858636] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.859247] kasan_report+0xbe/0xf0 [ 30.859729] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.860347] vma_interval_tree_remove+0xc75/0xec0 [ 30.860954] vma_prepare+0xc54/0x11a0 [ 30.861434] __split_vma+0x5af/0x950 [ 30.861928] ? __pfx___split_vma+0x10/0x10 [ 30.862457] ? find_held_lock+0x2c/0x110 [ 30.862971] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.863536] ? lock_is_held_type+0x9f/0x120 [ 30.864066] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.864667] ? mtree_range_walk+0x632/0x900 [ 30.865216] ? mas_walk+0x5c7/0x7c0 [ 30.865704] do_vmi_munmap+0x1f1/0x2b0 [ 30.866201] mmap_region+0x1f9/0x2660 [ 30.866689] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.867199] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.867914] ? __pfx_lock_acquire+0x10/0x10 [ 30.868440] ? __pfx_mmap_region+0x10/0x10 [ 30.868967] ? security_mmap_addr+0x7d/0xa0 [ 30.869491] ? get_unmapped_area+0x1f5/0x3f0 [ 30.870069] do_mmap+0x854/0xf00 [ 30.870508] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.870998] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.871556] ksys_mmap_pgoff+0x3af/0x500 [ 30.872056] do_syscall_64+0x3f/0x90 [ 30.872543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.873182] RIP: 0033:0x7f46b6d23d82 [ 30.873658] 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 [ 30.875748] RSP: 002b:00007ffce7ffa468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.876650] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46b6d23d82 [ 30.877491] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f46b615d000 [ 30.878357] RBP: 00007f46b615d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.879195] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591680d9ec0 [ 30.880039] R13: 00007ffce7ffa480 R14: 00007ffce7ffa4b0 R15: 00007ffce7ffa810 [ 30.880887] [ 30.881183] [ 30.881402] Allocated by task 213: [ 30.881852] kasan_save_stack+0x22/0x50 [ 30.882355] kasan_set_track+0x25/0x30 [ 30.882844] __kasan_slab_alloc+0x59/0x70 [ 30.883362] kmem_cache_alloc+0x16b/0x370 [ 30.883873] vm_area_dup+0x20/0x160 [ 30.884329] __split_vma+0x170/0x950 [ 30.884801] split_vma+0xc6/0x110 [ 30.885240] mprotect_fixup+0x8d2/0xb30 [ 30.885769] do_mprotect_pkey+0x87e/0xd40 [ 30.886287] __x64_sys_mprotect+0x78/0xc0 [ 30.886808] do_syscall_64+0x3f/0x90 [ 30.887284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887925] [ 30.888139] Freed by task 13: [ 30.888533] kasan_save_stack+0x22/0x50 [ 30.889036] kasan_set_track+0x25/0x30 [ 30.889526] kasan_save_free_info+0x2b/0x50 [ 30.890070] __kasan_slab_free+0x10a/0x190 [ 30.890601] kmem_cache_free+0x10d/0x4d0 [ 30.891101] rcu_core+0x8c8/0x2860 [ 30.891547] __do_softirq+0x1b7/0x7d4 [ 30.892026] [ 30.892240] Last potentially related work creation: [ 30.892828] kasan_save_stack+0x22/0x50 [ 30.893328] __kasan_record_aux_stack+0x8e/0xa0 [ 30.893959] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.894645] remove_vma+0x139/0x170 [ 30.895200] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.895793] do_vmi_munmap+0x1f1/0x2b0 [ 30.896304] __vm_munmap+0x138/0x3a0 [ 30.896791] __x64_sys_munmap+0x59/0x80 [ 30.897310] do_syscall_64+0x3f/0x90 [ 30.897837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.898515] [ 30.898736] The buggy address belongs to the object at ffff88800ef280e8 [ 30.898736] which belongs to the cache vm_area_struct of size 168 [ 30.900262] The buggy address is located 88 bytes inside of [ 30.900262] freed 168-byte region [ffff88800ef280e8, ffff88800ef28190) [ 30.901768] [ 30.901994] The buggy address belongs to the physical page: [ 30.902685] page:0000000021718984 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef28 [ 30.903830] memcg:ffff888018ee3101 [ 30.904279] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.904959] page_type: 0xffffffff() [ 30.905426] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.906398] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ee3101 [ 30.907353] page dumped because: kasan: bad access detected [ 30.908048] [ 30.908275] Memory state around the buggy address: [ 30.908894] ffff88800ef28000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.909807] ffff88800ef28080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.910699] >ffff88800ef28100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.911599] ^ [ 30.912273] ffff88800ef28180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.913168] ffff88800ef28200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.914067] ================================================================== [ 30.915049] Disabling lock debugging due to kernel taint [ 33.084131] BUG: Bad rss-counter state mm:0000000084e0051c type:MM_FILEPAGES val:33 [ 33.085127] BUG: Bad rss-counter state mm:0000000084e0051c type:MM_ANONPAGES val:22 [ 33.649693] BUG: Bad rss-counter state mm:00000000d8452082 type:MM_FILEPAGES val:33 [ 33.650682] BUG: Bad rss-counter state mm:00000000d8452082 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20405' (ECDSA) to the list of known hosts. 2023/06/19 20:47:04 fuzzer started 2023/06/19 20:47:05 dialing manager at localhost:44161 2023/06/19 20:47:05 checking machine... 2023/06/19 20:47:05 checking revisions... [ 34.270151] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:47:05 testing simple program... [ 34.319519] cgroup: Unknown subsys name 'net' [ 34.412150] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:47:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81806192 RDI=ffff88806ce3d1a0 RBP=ffff88806ce3d1a0 RSP=ffff88800fed74b0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff888019ed8000 R12=ffff888008442280 R13=ffffea000067b600 R14=0000000000000000 R15=0000000000000003 RIP=ffffffff812d860e 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe5e2a54900 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=00007fe5e300b618 CR3=0000000018d6a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007fd5fdd55700 CR3=0000000013a80000 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=98ec5f23119935b7a34a2987f9814aee XMM02=000000000011f998eff9b2d0a8fce9cb XMM03=000000000011fa682c67c8bc2e329bc3 XMM04=636933c3452079c600000000000ae988 XMM05=59d5b690e0af863b0000000000133d40 XMM06=83ba8cd20cbf77a20000000000132ba8 XMM07=e042d86d42eb936e0000000000124428 XMM08=651a70d2ea6f00d1000000000011fa68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000