syzkaller login: [ 31.112991] BUG: Bad rss-counter state mm:00000000da953368 type:MM_FILEPAGES val:33 [ 31.114047] BUG: Bad rss-counter state mm:00000000da953368 type:MM_ANONPAGES val:22 [ 31.273089] ================================================================== [ 31.274147] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.275100] Read of size 8 at addr ffff88800d1a9a50 by task sshd/220 [ 31.276018] [ 31.276237] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.277129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.278122] Call Trace: [ 31.278446] [ 31.278733] dump_stack_lvl+0x91/0xf0 [ 31.279227] print_report+0xcc/0x620 [ 31.279716] ? __virt_addr_valid+0x102/0x340 [ 31.280272] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.280898] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.281524] kasan_report+0xbe/0xf0 [ 31.282003] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.282626] vma_interval_tree_remove+0xc75/0xec0 [ 31.283232] vma_prepare+0xc54/0x11a0 [ 31.283711] __split_vma+0x5af/0x950 [ 31.284184] ? __pfx___split_vma+0x10/0x10 [ 31.284711] ? find_held_lock+0x2c/0x110 [ 31.285254] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.285824] ? lock_is_held_type+0x9f/0x120 [ 31.286364] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.286978] ? mtree_range_walk+0x632/0x900 [ 31.287533] ? mas_walk+0x5c7/0x7c0 [ 31.288017] do_vmi_munmap+0x1f1/0x2b0 [ 31.288510] mmap_region+0x1f9/0x2660 [ 31.289011] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.289526] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.290241] ? __pfx_lock_acquire+0x10/0x10 [ 31.290792] ? __pfx_mmap_region+0x10/0x10 [ 31.291339] ? security_mmap_addr+0x7d/0xa0 [ 31.291883] ? get_unmapped_area+0x1f5/0x3f0 [ 31.292464] do_mmap+0x854/0xf00 [ 31.292913] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.293420] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.293993] ksys_mmap_pgoff+0x3af/0x500 [ 31.294501] do_syscall_64+0x3f/0x90 [ 31.294975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295632] RIP: 0033:0x7fd31a0ebd82 [ 31.296093] 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 [ 31.298246] RSP: 002b:00007fffe13bf0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.299147] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd31a0ebd82 [ 31.300003] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd319525000 [ 31.300869] RBP: 00007fd319525000 R08: 0000000000000009 R09: 0000000000001000 [ 31.301739] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a4a378980 [ 31.302598] R13: 00007fffe13bf0d0 R14: 00007fffe13bf100 R15: 00007fffe13bf460 [ 31.303464] [ 31.303761] [ 31.303982] Allocated by task 213: [ 31.304417] kasan_save_stack+0x22/0x50 [ 31.304957] kasan_set_track+0x25/0x30 [ 31.305459] __kasan_slab_alloc+0x59/0x70 [ 31.306004] kmem_cache_alloc+0x16b/0x370 [ 31.306524] vm_area_dup+0x20/0x160 [ 31.306981] __split_vma+0x170/0x950 [ 31.307451] split_vma+0xc6/0x110 [ 31.307900] mprotect_fixup+0x8d2/0xb30 [ 31.308418] do_mprotect_pkey+0x87e/0xd40 [ 31.308959] __x64_sys_mprotect+0x78/0xc0 [ 31.309487] do_syscall_64+0x3f/0x90 [ 31.309961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.310601] [ 31.310820] Freed by task 213: [ 31.311218] kasan_save_stack+0x22/0x50 [ 31.311722] kasan_set_track+0x25/0x30 [ 31.312223] kasan_save_free_info+0x2b/0x50 [ 31.312754] __kasan_slab_free+0x10a/0x190 [ 31.313312] kmem_cache_free+0x10d/0x4d0 [ 31.313821] rcu_core+0x8c8/0x2860 [ 31.314267] __do_softirq+0x1b7/0x7d4 [ 31.314746] [ 31.314963] Last potentially related work creation: [ 31.315554] kasan_save_stack+0x22/0x50 [ 31.316069] __kasan_record_aux_stack+0x8e/0xa0 [ 31.316657] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.317367] remove_vma+0x139/0x170 [ 31.317826] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.318382] do_vmi_munmap+0x1f1/0x2b0 [ 31.318867] __vm_munmap+0x138/0x3a0 [ 31.319348] __x64_sys_munmap+0x59/0x80 [ 31.319845] do_syscall_64+0x3f/0x90 [ 31.320319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.320985] [ 31.321209] The buggy address belongs to the object at ffff88800d1a99f8 [ 31.321209] which belongs to the cache vm_area_struct of size 168 [ 31.322677] The buggy address is located 88 bytes inside of [ 31.322677] freed 168-byte region [ffff88800d1a99f8, ffff88800d1a9aa0) [ 31.324077] [ 31.324295] The buggy address belongs to the physical page: [ 31.324970] page:00000000f03212c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd1a9 [ 31.326050] memcg:ffff88800968cb01 [ 31.326477] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.327182] page_type: 0xffffffff() [ 31.327638] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.328568] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800968cb01 [ 31.329498] page dumped because: kasan: bad access detected [ 31.330164] [ 31.330382] Memory state around the buggy address: [ 31.330964] ffff88800d1a9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.331833] ffff88800d1a9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.332687] >ffff88800d1a9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.333567] ^ [ 31.334272] ffff88800d1a9a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.335134] ffff88800d1a9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.335993] ================================================================== [ 31.336921] Disabling lock debugging due to kernel taint [ 33.287558] BUG: Bad rss-counter state mm:00000000c906bb8f type:MM_FILEPAGES val:33 [ 33.288605] BUG: Bad rss-counter state mm:00000000c906bb8f type:MM_ANONPAGES val:22 [ 33.828295] BUG: Bad rss-counter state mm:000000005a939e4e type:MM_FILEPAGES val:33 [ 33.829741] BUG: Bad rss-counter state mm:000000005a939e4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11344' (ECDSA) to the list of known hosts. 2023/06/20 06:59:16 fuzzer started 2023/06/20 06:59:16 dialing manager at localhost:44161 2023/06/20 06:59:16 checking machine... 2023/06/20 06:59:16 checking revisions... [ 34.533850] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:59:16 testing simple program... [ 34.581302] cgroup: Unknown subsys name 'net' [ 34.619186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:59:15 Registers: info registers vcpu 0 RAX=00000000001fbff8 RBX=000000000010fc50 RCX=00007fc719b16320 RDX=00007fc719b15d00 RSI=00007ffd2e457b98 RDI=000055abe31532a0 RBP=00007ffd2e457c28 RSP=00007ffd2e457b90 R8 =0000000000000051 R9 =000000000010fc50 R10=0000000000000002 R11=000000000052545f R12=00007fc71841ec50 R13=00000000001101b8 R14=0000000000000000 R15=00007ffd2e457ba0 RIP=00007fc719aa7b0f RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc718f24900 00000000 00000000 GS =0000 0000000000000000 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=00007fc718351a30 CR3=000000000c91c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=183892ea00b30f3700000000000ae988 XMM05=a0ca2f240c6a48190000000000134968 XMM06=4fda316b135da52b0000000000133758 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00002000000000000000000000200000 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=ffff888008c58400 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=00007fd93859d618 CR3=000000000ede8000 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=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