syzkaller login: [ 36.217621] BUG: Bad rss-counter state mm:00000000b1e34bab type:MM_FILEPAGES val:33 [ 36.219279] BUG: Bad rss-counter state mm:00000000b1e34bab type:MM_ANONPAGES val:22 [ 36.381347] ================================================================== [ 36.382400] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.383324] Read of size 8 at addr ffff88800ff28798 by task sshd/220 [ 36.384202] [ 36.384417] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.385288] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.386279] Call Trace: [ 36.386604] [ 36.386885] dump_stack_lvl+0x91/0xf0 [ 36.387378] print_report+0xcc/0x620 [ 36.387869] ? __virt_addr_valid+0x102/0x340 [ 36.388421] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.389033] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.389687] kasan_report+0xbe/0xf0 [ 36.390174] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.390801] vma_interval_tree_remove+0xc75/0xec0 [ 36.391397] vma_prepare+0xc54/0x11a0 [ 36.391879] __split_vma+0x5af/0x950 [ 36.392355] ? __pfx___split_vma+0x10/0x10 [ 36.392885] ? find_held_lock+0x2c/0x110 [ 36.393412] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.393988] ? lock_is_held_type+0x9f/0x120 [ 36.394533] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.395145] ? mtree_range_walk+0x632/0x900 [ 36.395701] ? mas_walk+0x5c7/0x7c0 [ 36.396183] do_vmi_munmap+0x1f1/0x2b0 [ 36.396676] mmap_region+0x1f9/0x2660 [ 36.397162] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.397686] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.398405] ? __pfx_lock_acquire+0x10/0x10 [ 36.398947] ? __pfx_mmap_region+0x10/0x10 [ 36.399483] ? security_mmap_addr+0x7d/0xa0 [ 36.400013] ? get_unmapped_area+0x1f5/0x3f0 [ 36.400570] do_mmap+0x854/0xf00 [ 36.401009] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.401538] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.402102] ksys_mmap_pgoff+0x3af/0x500 [ 36.402612] do_syscall_64+0x3f/0x90 [ 36.403091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.403739] RIP: 0033:0x7f97526f5d82 [ 36.404196] 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 [ 36.406326] RSP: 002b:00007ffd63059298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.407228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f97526f5d82 [ 36.408073] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9751b2f000 [ 36.408920] RBP: 00007f9751b2f000 R08: 0000000000000009 R09: 0000000000001000 [ 36.409779] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9b6fb2ec0 [ 36.410625] R13: 00007ffd630592b0 R14: 00007ffd630592e0 R15: 00007ffd63059640 [ 36.411483] [ 36.411782] [ 36.411998] Allocated by task 213: [ 36.412425] kasan_save_stack+0x22/0x50 [ 36.412934] kasan_set_track+0x25/0x30 [ 36.413430] __kasan_slab_alloc+0x59/0x70 [ 36.413963] kmem_cache_alloc+0x16b/0x370 [ 36.414481] vm_area_dup+0x20/0x160 [ 36.414932] __split_vma+0x170/0x950 [ 36.415403] split_vma+0xc6/0x110 [ 36.415844] mprotect_fixup+0x8d2/0xb30 [ 36.416358] do_mprotect_pkey+0x87e/0xd40 [ 36.416876] __x64_sys_mprotect+0x78/0xc0 [ 36.417404] do_syscall_64+0x3f/0x90 [ 36.417885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.418528] [ 36.418746] Freed by task 213: [ 36.419140] kasan_save_stack+0x22/0x50 [ 36.419639] kasan_set_track+0x25/0x30 [ 36.420134] kasan_save_free_info+0x2b/0x50 [ 36.420660] __kasan_slab_free+0x10a/0x190 [ 36.421195] kmem_cache_free+0x10d/0x4d0 [ 36.421716] rcu_core+0x8c8/0x2860 [ 36.422161] __do_softirq+0x1b7/0x7d4 [ 36.422645] [ 36.422863] Last potentially related work creation: [ 36.423446] kasan_save_stack+0x22/0x50 [ 36.423954] __kasan_record_aux_stack+0x8e/0xa0 [ 36.424531] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.425184] remove_vma+0x139/0x170 [ 36.425658] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.426215] do_vmi_munmap+0x1f1/0x2b0 [ 36.426701] __vm_munmap+0x138/0x3a0 [ 36.427165] __x64_sys_munmap+0x59/0x80 [ 36.427658] do_syscall_64+0x3f/0x90 [ 36.428137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.428790] [ 36.429003] Second to last potentially related work creation: [ 36.429700] kasan_save_stack+0x22/0x50 [ 36.430203] __kasan_record_aux_stack+0x8e/0xa0 [ 36.430775] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.431409] remove_vma+0x139/0x170 [ 36.431862] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.432413] do_vmi_munmap+0x1f1/0x2b0 [ 36.432908] __vm_munmap+0x138/0x3a0 [ 36.433371] __x64_sys_munmap+0x59/0x80 [ 36.433879] do_syscall_64+0x3f/0x90 [ 36.434360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.435005] [ 36.435221] The buggy address belongs to the object at ffff88800ff28740 [ 36.435221] which belongs to the cache vm_area_struct of size 168 [ 36.436681] The buggy address is located 88 bytes inside of [ 36.436681] freed 168-byte region [ffff88800ff28740, ffff88800ff287e8) [ 36.438084] [ 36.438302] The buggy address belongs to the physical page: [ 36.438957] page:00000000c46bedbf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff28 [ 36.440036] memcg:ffff88800d2d4d01 [ 36.440494] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.441139] page_type: 0xffffffff() [ 36.441603] raw: 0100000000000200 ffff8880087a0c80 ffffea00003893c0 dead000000000008 [ 36.442538] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2d4d01 [ 36.443449] page dumped because: kasan: bad access detected [ 36.444110] [ 36.444336] Memory state around the buggy address: [ 36.444919] ffff88800ff28680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.445780] ffff88800ff28700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.446640] >ffff88800ff28780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.447477] ^ [ 36.447978] ffff88800ff28800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.448838] ffff88800ff28880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.449697] ================================================================== [ 36.450744] Disabling lock debugging due to kernel taint [ 38.793619] BUG: Bad rss-counter state mm:0000000046d05073 type:MM_FILEPAGES val:33 [ 38.794678] BUG: Bad rss-counter state mm:0000000046d05073 type:MM_ANONPAGES val:22 [ 39.324327] BUG: Bad rss-counter state mm:0000000084e62046 type:MM_FILEPAGES val:33 [ 39.325367] BUG: Bad rss-counter state mm:0000000084e62046 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47067' (ECDSA) to the list of known hosts. 2023/06/20 23:25:33 fuzzer started 2023/06/20 23:25:33 dialing manager at localhost:36067 2023/06/20 23:25:33 checking machine... 2023/06/20 23:25:33 checking revisions... [ 39.972515] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:25:33 testing simple program... [ 40.018164] cgroup: Unknown subsys name 'net' [ 40.057269] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:25:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652b60 RCX=ffffffff814c84a1 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88801039f5a0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=00007f832f009ace R13=0000000000000000 R14=ffff8880094eb680 R15=ffff88800ec7b000 RIP=ffffffff814c0408 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f832e485900 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=00007f832d8f49d0 CR3=000000000d9a4000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2767c0b7c9203e1f00000000000ae988 XMM05=b35f160214f733d40000000000133a60 XMM06=4fda316b135da52b00000000001324e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008e37f58 RCX=0000000000000001 RDX=1ffff110011c6f31 RSI=ffff888008e37f28 RDI=ffff888008e37988 RBP=ffff888008e30000 RSP=ffff888008e37908 R8 =0000000000000001 R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000009bf7 R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e37f28 R15=ffff888008e37978 RIP=ffffffff81131ca6 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 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=00007ffc2bccb000 CR3=000000000d704000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000