syzkaller login: [ 31.104421] BUG: Bad rss-counter state mm:00000000a9e828d4 type:MM_FILEPAGES val:33 [ 31.105590] BUG: Bad rss-counter state mm:00000000a9e828d4 type:MM_ANONPAGES val:22 [ 31.269727] ================================================================== [ 31.270636] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.271617] Read of size 8 at addr ffff88800cc47880 by task sshd/220 [ 31.272521] [ 31.272747] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.273620] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.274623] Call Trace: [ 31.274979] [ 31.275267] dump_stack_lvl+0x91/0xf0 [ 31.275772] print_report+0xcc/0x620 [ 31.276291] ? __virt_addr_valid+0x102/0x340 [ 31.276859] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277489] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.278118] kasan_report+0xbe/0xf0 [ 31.278606] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.279250] vma_interval_tree_remove+0xc75/0xec0 [ 31.279852] vma_prepare+0xc54/0x11a0 [ 31.280367] __split_vma+0x5af/0x950 [ 31.280842] ? __pfx___split_vma+0x10/0x10 [ 31.281379] ? find_held_lock+0x2c/0x110 [ 31.281897] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.282470] ? lock_is_held_type+0x9f/0x120 [ 31.283039] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.283643] ? mtree_range_walk+0x632/0x900 [ 31.284232] ? mas_walk+0x5c7/0x7c0 [ 31.284713] do_vmi_munmap+0x1f1/0x2b0 [ 31.285215] mmap_region+0x1f9/0x2660 [ 31.285695] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.286208] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.286932] ? __pfx_lock_acquire+0x10/0x10 [ 31.287480] ? __pfx_mmap_region+0x10/0x10 [ 31.288046] ? security_mmap_addr+0x7d/0xa0 [ 31.288584] ? get_unmapped_area+0x1f5/0x3f0 [ 31.289135] do_mmap+0x854/0xf00 [ 31.289572] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.290070] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.290628] ksys_mmap_pgoff+0x3af/0x500 [ 31.291169] do_syscall_64+0x3f/0x90 [ 31.291648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.292325] RIP: 0033:0x7efdf6f46d82 [ 31.292779] 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 [ 31.294918] RSP: 002b:00007ffe30d07ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.295817] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efdf6f46d82 [ 31.296696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efdf6380000 [ 31.297534] RBP: 00007efdf6380000 R08: 0000000000000009 R09: 0000000000001000 [ 31.298377] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c15184cec0 [ 31.299234] R13: 00007ffe30d07d00 R14: 00007ffe30d07d30 R15: 00007ffe30d08090 [ 31.300131] [ 31.300426] [ 31.300643] Allocated by task 213: [ 31.301081] kasan_save_stack+0x22/0x50 [ 31.301592] kasan_set_track+0x25/0x30 [ 31.302086] __kasan_slab_alloc+0x59/0x70 [ 31.302608] kmem_cache_alloc+0x16b/0x370 [ 31.303150] vm_area_dup+0x20/0x160 [ 31.303606] __split_vma+0x170/0x950 [ 31.304106] split_vma+0xc6/0x110 [ 31.304546] mprotect_fixup+0x8d2/0xb30 [ 31.305045] do_mprotect_pkey+0x87e/0xd40 [ 31.305565] __x64_sys_mprotect+0x78/0xc0 [ 31.306081] do_syscall_64+0x3f/0x90 [ 31.306550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.307216] [ 31.307433] Freed by task 213: [ 31.307824] kasan_save_stack+0x22/0x50 [ 31.308363] kasan_set_track+0x25/0x30 [ 31.308864] kasan_save_free_info+0x2b/0x50 [ 31.309401] __kasan_slab_free+0x10a/0x190 [ 31.309937] kmem_cache_free+0x10d/0x4d0 [ 31.310443] rcu_core+0x8c8/0x2860 [ 31.310912] __do_softirq+0x1b7/0x7d4 [ 31.311401] [ 31.311621] Last potentially related work creation: [ 31.312250] kasan_save_stack+0x22/0x50 [ 31.312753] __kasan_record_aux_stack+0x8e/0xa0 [ 31.313329] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.313975] remove_vma+0x139/0x170 [ 31.314424] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.315015] do_vmi_munmap+0x1f1/0x2b0 [ 31.315499] __vm_munmap+0x138/0x3a0 [ 31.315980] __x64_sys_munmap+0x59/0x80 [ 31.316494] do_syscall_64+0x3f/0x90 [ 31.316972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.317624] [ 31.317839] Second to last potentially related work creation: [ 31.318523] kasan_save_stack+0x22/0x50 [ 31.319051] __kasan_record_aux_stack+0x8e/0xa0 [ 31.319621] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.320300] remove_vma+0x139/0x170 [ 31.320754] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.321318] do_vmi_munmap+0x1f1/0x2b0 [ 31.321807] __vm_munmap+0x138/0x3a0 [ 31.322283] __x64_sys_munmap+0x59/0x80 [ 31.322776] do_syscall_64+0x3f/0x90 [ 31.323278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323913] [ 31.324166] The buggy address belongs to the object at ffff88800cc47828 [ 31.324166] which belongs to the cache vm_area_struct of size 168 [ 31.325628] The buggy address is located 88 bytes inside of [ 31.325628] freed 168-byte region [ffff88800cc47828, ffff88800cc478d0) [ 31.327032] [ 31.327252] The buggy address belongs to the physical page: [ 31.327901] page:00000000b287d9ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc47 [ 31.329034] memcg:ffff88800c73c701 [ 31.329461] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.330172] page_type: 0xffffffff() [ 31.330626] raw: 0100000000000200 ffff88800879fc80 ffffea00001a27c0 dead000000000003 [ 31.331594] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c73c701 [ 31.332554] page dumped because: kasan: bad access detected [ 31.333238] [ 31.333455] Memory state around the buggy address: [ 31.334052] ffff88800cc47780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.334937] ffff88800cc47800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.335796] >ffff88800cc47880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.336681] ^ [ 31.337097] ffff88800cc47900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.337968] ffff88800cc47980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.338816] ================================================================== [ 31.340180] Disabling lock debugging due to kernel taint [ 33.753252] BUG: Bad rss-counter state mm:000000004b01692b type:MM_FILEPAGES val:33 [ 33.754232] BUG: Bad rss-counter state mm:000000004b01692b type:MM_ANONPAGES val:22 [ 34.216121] BUG: Bad rss-counter state mm:000000005e9addc3 type:MM_FILEPAGES val:33 [ 34.217264] BUG: Bad rss-counter state mm:000000005e9addc3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31194' (ECDSA) to the list of known hosts. 2023/06/19 22:54:46 fuzzer started 2023/06/19 22:54:46 dialing manager at localhost:44161 2023/06/19 22:54:46 checking machine... 2023/06/19 22:54:46 checking revisions... [ 34.921729] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:54:46 testing simple program... [ 34.967428] cgroup: Unknown subsys name 'net' [ 35.021525] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:54:45 Registers: info registers vcpu 0 RAX=ffffffff83c22bf2 RBX=ffffffff85fe3af4 RCX=ffffffff83c22ffb RDX=0000000000000000 RSI=ffffffff86411e7c RDI=ffffffff85fe3af4 RBP=ffffffff85fe3af8 RSP=ffff88800e88f4f0 R8 =ffffffff86411e7c R9 =ffff88800e88f5e8 R10=0000000000038001 R11=000000000009a9c8 R12=ffffffff85fe3af4 R13=ffffffff85fe3af4 R14=ffffffff85fe3af4 R15=dffffc0000000000 RIP=ffffffff8112fc4f RFL=00000206 [-----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 00007f7354f48700 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=00007f7d6dd2f250 CR3=000000000dd70000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38393337342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383933 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180ee7e RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff110011caf2b RSI=ffffffff8180ee7e RDI=ffff888008e579c8 RBP=ffff888008e57998 RSP=ffff888008e578f8 R8 =ffffffff8613751e R9 =ffff888008e57940 R10=0000000000038001 R11=0000000000020d8a R12=ffff888008e579c8 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff888016b8cb58 RIP=ffffffff813ad420 RFL=00000286 [--S--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 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=00007ffd0cf97000 CR3=000000000eada000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000