syzkaller login: [ 38.658416] BUG: Bad rss-counter state mm:000000006ab7e85b type:MM_FILEPAGES val:33 [ 38.660240] BUG: Bad rss-counter state mm:000000006ab7e85b type:MM_ANONPAGES val:22 [ 38.822627] ================================================================== [ 38.823489] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.824363] Read of size 8 at addr ffff888017ead6b0 by task sshd/221 [ 38.825088] [ 38.825342] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.826193] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.827107] Call Trace: [ 38.827413] [ 38.827836] dump_stack_lvl+0x91/0xf0 [ 38.828422] print_report+0xcc/0x620 [ 38.829000] ? __virt_addr_valid+0x102/0x340 [ 38.829639] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.830374] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.831079] kasan_report+0xbe/0xf0 [ 38.831627] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.832351] vma_interval_tree_remove+0xc75/0xec0 [ 38.833031] vma_prepare+0xc54/0x11a0 [ 38.833593] __split_vma+0x5af/0x950 [ 38.834164] ? __pfx___split_vma+0x10/0x10 [ 38.834824] ? find_held_lock+0x2c/0x110 [ 38.835482] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.836196] ? lock_is_held_type+0x9f/0x120 [ 38.836877] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.837627] ? mtree_range_walk+0x632/0x900 [ 38.838297] ? mas_walk+0x5c7/0x7c0 [ 38.838760] do_vmi_munmap+0x1f1/0x2b0 [ 38.839250] mmap_region+0x1f9/0x2660 [ 38.839728] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.840237] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.840920] ? __pfx_lock_acquire+0x10/0x10 [ 38.841445] ? __pfx_mmap_region+0x10/0x10 [ 38.841965] ? security_mmap_addr+0x7d/0xa0 [ 38.842483] ? get_unmapped_area+0x1f5/0x3f0 [ 38.843024] do_mmap+0x854/0xf00 [ 38.843462] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.843943] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.844490] ksys_mmap_pgoff+0x3af/0x500 [ 38.844985] do_syscall_64+0x3f/0x90 [ 38.845460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.846109] RIP: 0033:0x7fbc66819d82 [ 38.846559] 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 [ 38.848642] RSP: 002b:00007ffe236b5f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.849530] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc66819d82 [ 38.850386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc65c53000 [ 38.851226] RBP: 00007fbc65c53000 R08: 0000000000000009 R09: 0000000000001000 [ 38.852062] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6e00e0ec0 [ 38.852887] R13: 00007ffe236b5fb0 R14: 00007ffe236b5fe0 R15: 00007ffe236b6340 [ 38.853717] [ 38.854015] [ 38.854228] Allocated by task 214: [ 38.854639] kasan_save_stack+0x22/0x50 [ 38.855142] kasan_set_track+0x25/0x30 [ 38.855620] __kasan_slab_alloc+0x59/0x70 [ 38.856139] kmem_cache_alloc+0x16b/0x370 [ 38.856639] vm_area_dup+0x20/0x160 [ 38.857083] __split_vma+0x170/0x950 [ 38.857549] split_vma+0xc6/0x110 [ 38.857991] mprotect_fixup+0x8d2/0xb30 [ 38.858498] do_mprotect_pkey+0x87e/0xd40 [ 38.859018] __x64_sys_mprotect+0x78/0xc0 [ 38.859535] do_syscall_64+0x3f/0x90 [ 38.860003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.860638] [ 38.860851] Freed by task 214: [ 38.861229] kasan_save_stack+0x22/0x50 [ 38.861714] kasan_set_track+0x25/0x30 [ 38.862211] kasan_save_free_info+0x2b/0x50 [ 38.862732] __kasan_slab_free+0x10a/0x190 [ 38.863253] kmem_cache_free+0x10d/0x4d0 [ 38.863755] rcu_core+0x8c8/0x2860 [ 38.864196] __do_softirq+0x1b7/0x7d4 [ 38.864657] [ 38.864864] Last potentially related work creation: [ 38.865436] kasan_save_stack+0x22/0x50 [ 38.865932] __kasan_record_aux_stack+0x8e/0xa0 [ 38.866506] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.867139] remove_vma+0x139/0x170 [ 38.867569] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.868116] do_vmi_munmap+0x1f1/0x2b0 [ 38.868592] __vm_munmap+0x138/0x3a0 [ 38.869061] __x64_sys_munmap+0x59/0x80 [ 38.869542] do_syscall_64+0x3f/0x90 [ 38.870031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.870661] [ 38.870870] Second to last potentially related work creation: [ 38.871536] kasan_save_stack+0x22/0x50 [ 38.872025] __kasan_record_aux_stack+0x8e/0xa0 [ 38.872586] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.873212] remove_vma+0x139/0x170 [ 38.873649] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.874209] do_vmi_munmap+0x1f1/0x2b0 [ 38.874684] mmap_region+0x1f9/0x2660 [ 38.875147] do_mmap+0x854/0xf00 [ 38.875575] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.876066] ksys_mmap_pgoff+0x3af/0x500 [ 38.876562] do_syscall_64+0x3f/0x90 [ 38.877036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.877662] [ 38.877870] The buggy address belongs to the object at ffff888017ead658 [ 38.877870] which belongs to the cache vm_area_struct of size 168 [ 38.879342] The buggy address is located 88 bytes inside of [ 38.879342] freed 168-byte region [ffff888017ead658, ffff888017ead700) [ 38.880729] [ 38.880938] The buggy address belongs to the physical page: [ 38.881581] page:000000008b149e13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17ead [ 38.882667] memcg:ffff888017cc6b01 [ 38.883090] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.883725] page_type: 0xffffffff() [ 38.884172] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a5e80 dead000000000002 [ 38.885065] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017cc6b01 [ 38.885962] page dumped because: kasan: bad access detected [ 38.886618] [ 38.886834] Memory state around the buggy address: [ 38.887407] ffff888017ead580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.888249] ffff888017ead600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.889076] >ffff888017ead680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.889917] ^ [ 38.890489] ffff888017ead700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.891332] ffff888017ead780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.892168] ================================================================== [ 38.893291] Disabling lock debugging due to kernel taint [ 40.919197] BUG: Bad rss-counter state mm:0000000030d2f3fb type:MM_FILEPAGES val:33 [ 40.920098] BUG: Bad rss-counter state mm:0000000030d2f3fb type:MM_ANONPAGES val:22 [ 41.325268] BUG: Bad rss-counter state mm:00000000dbbc4af6 type:MM_FILEPAGES val:33 [ 41.326741] BUG: Bad rss-counter state mm:00000000dbbc4af6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11085' (ECDSA) to the list of known hosts. 2023/06/20 15:35:03 fuzzer started 2023/06/20 15:35:04 dialing manager at localhost:36067 2023/06/20 15:35:04 checking machine... 2023/06/20 15:35:04 checking revisions... [ 42.075552] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:35:04 testing simple program... [ 42.125513] cgroup: Unknown subsys name 'net' [ 42.164996] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:35:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8387423d RCX=0000000000000001 RDX=1ffff11001d48e4c RSI=ffff88800ea47958 RDI=ffffffff8387423d RBP=ffffffff8387423d RSP=ffff88800ea471b8 R8 =0000000000000001 R9 =ffff88800ea47248 R10=0000000000038001 R11=000000000008de00 R12=0000000000000001 R13=0000000000000000 R14=ffff88800f361b40 R15=0000000000000cc0 RIP=ffffffff811fc772 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 00007f9d5781e900 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=00007f9d57dd5618 CR3=0000000009b44000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fff6a8a53f8 CR3=0000000006982000 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=2033303a35333a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a35333a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000