syzkaller login: [ 70.195638] BUG: Bad rss-counter state mm:00000000ddcfabaf type:MM_FILEPAGES val:33 [ 70.196873] BUG: Bad rss-counter state mm:00000000ddcfabaf type:MM_ANONPAGES val:22 [ 70.354913] ================================================================== [ 70.355896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.356914] Read of size 8 at addr ffff88800d624d08 by task sshd/219 [ 70.357727] [ 70.357970] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 70.359210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.360274] Call Trace: [ 70.360654] <TASK> [ 70.360971] dump_stack_lvl+0x91/0xf0 [ 70.361512] print_report+0xcc/0x620 [ 70.362056] ? __virt_addr_valid+0x102/0x340 [ 70.362664] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.363332] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.363992] kasan_report+0xbe/0xf0 [ 70.364508] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.365179] vma_interval_tree_remove+0xc75/0xec0 [ 70.365833] vma_prepare+0xc54/0x11a0 [ 70.366368] __split_vma+0x5af/0x950 [ 70.366872] ? __pfx___split_vma+0x10/0x10 [ 70.367437] ? find_held_lock+0x2c/0x110 [ 70.368000] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.368613] ? lock_is_held_type+0x9f/0x120 [ 70.369194] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.369853] ? mtree_range_walk+0x632/0x900 [ 70.370473] ? mas_walk+0x5c7/0x7c0 [ 70.370983] do_vmi_munmap+0x1f1/0x2b0 [ 70.371525] mmap_region+0x1f9/0x2660 [ 70.372053] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.372599] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.373349] ? __pfx_lock_acquire+0x10/0x10 [ 70.373936] ? __pfx_mmap_region+0x10/0x10 [ 70.374500] ? security_mmap_addr+0x7d/0xa0 [ 70.375054] ? get_unmapped_area+0x1f5/0x3f0 [ 70.375639] do_mmap+0x854/0xf00 [ 70.376115] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.376639] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.377228] ksys_mmap_pgoff+0x3af/0x500 [ 70.377784] do_syscall_64+0x3f/0x90 [ 70.378317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.379022] RIP: 0033:0x7f6501027d82 [ 70.379529] 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 [ 70.381836] RSP: 002b:00007ffe17927db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.382830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6501027d82 [ 70.383737] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6500461000 [ 70.384655] RBP: 00007f6500461000 R08: 0000000000000009 R09: 0000000000001000 [ 70.385563] R10: 0000000000000812 R11: 0000000000000206 R12: 000056080385eec0 [ 70.386489] R13: 00007ffe17927dd0 R14: 00007ffe17927e00 R15: 00007ffe17928160 [ 70.387416] </TASK> [ 70.387728] [ 70.387959] Allocated by task 212: [ 70.388428] kasan_save_stack+0x22/0x50 [ 70.388969] kasan_set_track+0x25/0x30 [ 70.389504] __kasan_slab_alloc+0x59/0x70 [ 70.390068] kmem_cache_alloc+0x16b/0x370 [ 70.390631] vm_area_dup+0x20/0x160 [ 70.391113] __split_vma+0x170/0x950 [ 70.391613] split_vma+0xc6/0x110 [ 70.392093] mprotect_fixup+0x8d2/0xb30 [ 70.392626] do_mprotect_pkey+0x87e/0xd40 [ 70.393188] __x64_sys_mprotect+0x78/0xc0 [ 70.393753] do_syscall_64+0x3f/0x90 [ 70.394292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.394984] [ 70.395218] Freed by task 212: [ 70.395668] kasan_save_stack+0x22/0x50 [ 70.396210] kasan_set_track+0x25/0x30 [ 70.396738] kasan_save_free_info+0x2b/0x50 [ 70.397319] __kasan_slab_free+0x10a/0x190 [ 70.397916] kmem_cache_free+0x10d/0x4d0 [ 70.398455] rcu_core+0x8c8/0x2860 [ 70.398937] __do_softirq+0x1b7/0x7d4 [ 70.399462] [ 70.399705] Last potentially related work creation: [ 70.400356] kasan_save_stack+0x22/0x50 [ 70.400918] __kasan_record_aux_stack+0x8e/0xa0 [ 70.401558] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.402293] remove_vma+0x139/0x170 [ 70.402800] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.403419] do_vmi_munmap+0x1f1/0x2b0 [ 70.403955] __vm_munmap+0x138/0x3a0 [ 70.404481] __x64_sys_munmap+0x59/0x80 [ 70.405037] do_syscall_64+0x3f/0x90 [ 70.405561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.406303] [ 70.406548] Second to last potentially related work creation: [ 70.407321] kasan_save_stack+0x22/0x50 [ 70.407882] __kasan_record_aux_stack+0x8e/0xa0 [ 70.408524] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.409240] remove_vma+0x139/0x170 [ 70.409745] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.410376] do_vmi_munmap+0x1f1/0x2b0 [ 70.410925] mmap_region+0x1f9/0x2660 [ 70.411460] do_mmap+0x854/0xf00 [ 70.411942] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.412494] ksys_mmap_pgoff+0x3af/0x500 [ 70.413056] do_syscall_64+0x3f/0x90 [ 70.413595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.414335] [ 70.414580] The buggy address belongs to the object at ffff88800d624cb0 [ 70.414580] which belongs to the cache vm_area_struct of size 168 [ 70.416229] The buggy address is located 88 bytes inside of [ 70.416229] freed 168-byte region [ffff88800d624cb0, ffff88800d624d58) [ 70.417806] [ 70.418057] The buggy address belongs to the physical page: [ 70.418798] page:00000000bfb2b711 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd624 [ 70.420004] memcg:ffff88800c4f0c01 [ 70.420477] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 70.421250] page_type: 0xffffffff() [ 70.421752] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 70.422789] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4f0c01 [ 70.423801] page dumped because: kasan: bad access detected [ 70.424542] [ 70.424784] Memory state around the buggy address: [ 70.425431] ffff88800d624c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 70.426409] ffff88800d624c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 70.427366] >ffff88800d624d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 70.428312] ^ [ 70.428805] ffff88800d624d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 70.429762] ffff88800d624e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 70.430731] ================================================================== [ 70.431826] Disabling lock debugging due to kernel taint [ 73.321097] BUG: Bad rss-counter state mm:0000000088657c60 type:MM_FILEPAGES val:33 [ 73.322284] BUG: Bad rss-counter state mm:0000000088657c60 type:MM_ANONPAGES val:22 [ 73.793010] BUG: Bad rss-counter state mm:0000000062d298e2 type:MM_FILEPAGES val:33 [ 73.794207] BUG: Bad rss-counter state mm:0000000062d298e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39340' (ECDSA) to the list of known hosts. 2023/06/19 14:11:46 fuzzer started 2023/06/19 14:11:46 dialing manager at localhost:44161 2023/06/19 14:11:46 checking machine... 2023/06/19 14:11:46 checking revisions... [ 74.436774] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:11:46 testing simple program... [ 74.487540] cgroup: Unknown subsys name 'net' [ 74.553757] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:11:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d7f950 RCX=0000000000000001 RDX=1ffff110011aff2c RSI=ffff888008d7f920 RDI=ffff888008d7f960 RBP=ffff888008d78000 RSP=ffff888008d7f890 R8 =0000000000000001 R9 =ffff888008d7f990 R10=0000000000038001 R11=0000000000006097 R12=ffff888008d7f9b0 R13=ffff888008d7f998 R14=ffff888008d7f920 R15=ffff888008d7f950 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 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=00007fffef74f000 CR3=000000000e2e6000 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=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 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=00007fc806b52000 CR3=000000000f330000 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=2036343a31313a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a31313a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000