syzkaller login: [ 39.106335] BUG: Bad rss-counter state mm:00000000d51b1cba type:MM_FILEPAGES val:33 [ 39.107364] BUG: Bad rss-counter state mm:00000000d51b1cba type:MM_ANONPAGES val:22 [ 39.275113] ================================================================== [ 39.276193] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.277290] Read of size 8 at addr ffff888015c90058 by task sshd/221 [ 39.278347] [ 39.278565] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.279444] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.280438] Call Trace: [ 39.280763] [ 39.281050] dump_stack_lvl+0x91/0xf0 [ 39.281539] print_report+0xcc/0x620 [ 39.282036] ? __virt_addr_valid+0x102/0x340 [ 39.282595] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.283226] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.283849] kasan_report+0xbe/0xf0 [ 39.284330] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.284951] vma_interval_tree_remove+0xc75/0xec0 [ 39.285571] vma_prepare+0xc54/0x11a0 [ 39.286083] __split_vma+0x5af/0x950 [ 39.286559] ? __pfx___split_vma+0x10/0x10 [ 39.287093] ? find_held_lock+0x2c/0x110 [ 39.287621] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.288189] ? lock_is_held_type+0x9f/0x120 [ 39.288732] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.289343] ? mtree_range_walk+0x632/0x900 [ 39.289905] ? mas_walk+0x5c7/0x7c0 [ 39.290395] do_vmi_munmap+0x1f1/0x2b0 [ 39.290887] mmap_region+0x1f9/0x2660 [ 39.291370] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.291887] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.292610] ? __pfx_lock_acquire+0x10/0x10 [ 39.293143] ? __pfx_mmap_region+0x10/0x10 [ 39.293679] ? security_mmap_addr+0x7d/0xa0 [ 39.294233] ? get_unmapped_area+0x1f5/0x3f0 [ 39.294785] do_mmap+0x854/0xf00 [ 39.295233] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.295731] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.296294] ksys_mmap_pgoff+0x3af/0x500 [ 39.296807] do_syscall_64+0x3f/0x90 [ 39.297286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.297930] RIP: 0033:0x7f4cae305d82 [ 39.298406] 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 [ 39.300537] RSP: 002b:00007ffc4444e598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.301445] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4cae305d82 [ 39.302315] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4cad73f000 [ 39.303181] RBP: 00007f4cad73f000 R08: 0000000000000009 R09: 0000000000001000 [ 39.304029] R10: 0000000000000812 R11: 0000000000000206 R12: 000056135cffbec0 [ 39.304889] R13: 00007ffc4444e5b0 R14: 00007ffc4444e5e0 R15: 00007ffc4444e940 [ 39.305757] [ 39.306061] [ 39.306281] Allocated by task 214: [ 39.306714] kasan_save_stack+0x22/0x50 [ 39.307232] kasan_set_track+0x25/0x30 [ 39.307718] __kasan_slab_alloc+0x59/0x70 [ 39.308246] kmem_cache_alloc+0x16b/0x370 [ 39.308759] vm_area_dup+0x20/0x160 [ 39.309213] __split_vma+0x170/0x950 [ 39.309685] split_vma+0xc6/0x110 [ 39.310149] mprotect_fixup+0x8d2/0xb30 [ 39.310644] do_mprotect_pkey+0x87e/0xd40 [ 39.311171] __x64_sys_mprotect+0x78/0xc0 [ 39.311689] do_syscall_64+0x3f/0x90 [ 39.312173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.312839] [ 39.313057] Freed by task 204: [ 39.313455] kasan_save_stack+0x22/0x50 [ 39.313964] kasan_set_track+0x25/0x30 [ 39.314479] kasan_save_free_info+0x2b/0x50 [ 39.315007] __kasan_slab_free+0x10a/0x190 [ 39.315544] kmem_cache_free+0x10d/0x4d0 [ 39.316058] rcu_core+0x8c8/0x2860 [ 39.316505] __do_softirq+0x1b7/0x7d4 [ 39.316986] [ 39.317205] Last potentially related work creation: [ 39.317795] kasan_save_stack+0x22/0x50 [ 39.318319] __kasan_record_aux_stack+0x8e/0xa0 [ 39.318893] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.319613] remove_vma+0x139/0x170 [ 39.320064] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.320618] do_vmi_munmap+0x1f1/0x2b0 [ 39.321102] __vm_munmap+0x138/0x3a0 [ 39.321582] __x64_sys_munmap+0x59/0x80 [ 39.322090] do_syscall_64+0x3f/0x90 [ 39.322580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.323232] [ 39.323448] Second to last potentially related work creation: [ 39.324138] kasan_save_stack+0x22/0x50 [ 39.324647] __kasan_record_aux_stack+0x8e/0xa0 [ 39.325219] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.325883] remove_vma+0x139/0x170 [ 39.326358] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.326918] do_vmi_munmap+0x1f1/0x2b0 [ 39.327412] mmap_region+0x1f9/0x2660 [ 39.327896] do_mmap+0x854/0xf00 [ 39.328333] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.328831] ksys_mmap_pgoff+0x3af/0x500 [ 39.329344] do_syscall_64+0x3f/0x90 [ 39.329822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.330487] [ 39.330705] The buggy address belongs to the object at ffff888015c90000 [ 39.330705] which belongs to the cache vm_area_struct of size 168 [ 39.332176] The buggy address is located 88 bytes inside of [ 39.332176] freed 168-byte region [ffff888015c90000, ffff888015c900a8) [ 39.333585] [ 39.333799] The buggy address belongs to the physical page: [ 39.334463] page:00000000b30bb549 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c90 [ 39.335561] memcg:ffff888019af2501 [ 39.335983] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.336630] page_type: 0xffffffff() [ 39.337084] raw: 0100000000000200 ffff88800879fc80 ffffea000066f500 000000000000000c [ 39.338049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019af2501 [ 39.338977] page dumped because: kasan: bad access detected [ 39.339646] [ 39.339862] Memory state around the buggy address: [ 39.340447] ffff888015c8ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.341328] ffff888015c8ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.342215] >ffff888015c90000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.343064] ^ [ 39.343808] ffff888015c90080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.344667] ffff888015c90100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.345526] ================================================================== [ 39.346502] Disabling lock debugging due to kernel taint [ 41.594328] BUG: Bad rss-counter state mm:000000001b8ee075 type:MM_FILEPAGES val:33 [ 41.595325] BUG: Bad rss-counter state mm:000000001b8ee075 type:MM_ANONPAGES val:22 [ 42.108655] BUG: Bad rss-counter state mm:0000000079fa4b49 type:MM_FILEPAGES val:33 [ 42.109645] BUG: Bad rss-counter state mm:0000000079fa4b49 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56976' (ECDSA) to the list of known hosts. 2023/06/19 13:59:45 fuzzer started 2023/06/19 13:59:45 dialing manager at localhost:44161 2023/06/19 13:59:46 checking machine... 2023/06/19 13:59:46 checking revisions... [ 42.881780] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:59:46 testing simple program... [ 42.940436] cgroup: Unknown subsys name 'net' [ 42.976364] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:59:45 Registers: info registers vcpu 0 RAX=1ffff11001cd05be RBX=ffff88800e682dd8 RCX=0000000000000000 RDX=ffff888015dfd1c0 RSI=ffffffff816e6af9 RDI=ffff88800e682df0 RBP=dffffc0000000000 RSP=ffff88800eb27880 R8 =0000000000000006 R9 =0000000000000003 R10=0000000000000003 R11=00000000000b6996 R12=0000000000000027 R13=0000000000000003 R14=ffff888015d2b488 R15=ffff88800e59bb28 RIP=ffffffff816e6b08 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=00007f1423e7d028 CR3=000000000d132000 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=756e696c2d34365f3638782f62696c2f XMM01=6f732e616d7a6c62696c2f756e672d78 XMM02=00352e6f732e616d7a6c62696c2f756e XMM03=672d78756e696c2d34365f3638782f62 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8185a004 RBX=0000000000000009 RCX=0000000000000001 RDX=0000000000092cc0 RSI=000000000000000d RDI=ffff8880103777c8 RBP=dffffc0000000000 RSP=ffff8880103776f0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000d R13=0000000000092cc0 R14=ffff888010377780 R15=0000000000092cc0 RIP=ffffffff813ad5d5 RFL=00000283 [--S---C] 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 00007fd038a5c900 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=00007fd037e65070 CR3=000000000c942000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6ead391f546950ea00000000000ae988 XMM05=66b9b92e4d126bf90000000000135be0 XMM06=5fd4ee119b804f550000000000134610 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000