syzkaller login: [ 30.595386] BUG: Bad rss-counter state mm:000000009d4d8351 type:MM_FILEPAGES val:33 [ 30.596484] BUG: Bad rss-counter state mm:000000009d4d8351 type:MM_ANONPAGES val:22 [ 30.760048] ================================================================== [ 30.761229] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.762518] Read of size 8 at addr ffff88800c596228 by task sshd/220 [ 30.763414] [ 30.763644] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.764598] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.765705] Call Trace: [ 30.766066] [ 30.766386] dump_stack_lvl+0x91/0xf0 [ 30.766925] print_report+0xcc/0x620 [ 30.767454] ? __virt_addr_valid+0x102/0x340 [ 30.768101] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.768787] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.769466] kasan_report+0xbe/0xf0 [ 30.769992] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.770675] vma_interval_tree_remove+0xc75/0xec0 [ 30.771330] vma_prepare+0xc54/0x11a0 [ 30.771848] __split_vma+0x5af/0x950 [ 30.772355] ? __pfx___split_vma+0x10/0x10 [ 30.772929] ? find_held_lock+0x2c/0x110 [ 30.773498] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.774136] ? lock_is_held_type+0x9f/0x120 [ 30.774731] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.775394] ? mtree_range_walk+0x632/0x900 [ 30.775989] ? mas_walk+0x5c7/0x7c0 [ 30.776493] do_vmi_munmap+0x1f1/0x2b0 [ 30.777011] mmap_region+0x1f9/0x2660 [ 30.777488] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.778022] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.778742] ? __pfx_lock_acquire+0x10/0x10 [ 30.779277] ? __pfx_mmap_region+0x10/0x10 [ 30.779804] ? security_mmap_addr+0x7d/0xa0 [ 30.780340] ? get_unmapped_area+0x1f5/0x3f0 [ 30.780883] do_mmap+0x854/0xf00 [ 30.781327] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.781828] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.782393] ksys_mmap_pgoff+0x3af/0x500 [ 30.782907] do_syscall_64+0x3f/0x90 [ 30.783389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.784049] RIP: 0033:0x7f044a904d82 [ 30.784498] 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 [ 30.786625] RSP: 002b:00007ffca8c44ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.787523] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f044a904d82 [ 30.788389] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0449d3e000 [ 30.789213] RBP: 00007f0449d3e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.790020] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562bf0728f70 [ 30.790829] R13: 00007ffca8c44f10 R14: 00007ffca8c44f40 R15: 00007ffca8c452a0 [ 30.791626] [ 30.791942] [ 30.792146] Allocated by task 213: [ 30.792554] kasan_save_stack+0x22/0x50 [ 30.793079] kasan_set_track+0x25/0x30 [ 30.793545] __kasan_slab_alloc+0x59/0x70 [ 30.794068] kmem_cache_alloc+0x16b/0x370 [ 30.794562] vm_area_dup+0x20/0x160 [ 30.794993] __split_vma+0x170/0x950 [ 30.795432] split_vma+0xc6/0x110 [ 30.795847] mprotect_fixup+0x8d2/0xb30 [ 30.796323] do_mprotect_pkey+0x87e/0xd40 [ 30.796818] __x64_sys_mprotect+0x78/0xc0 [ 30.797311] do_syscall_64+0x3f/0x90 [ 30.797786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.798428] [ 30.798633] Freed by task 203: [ 30.799063] kasan_save_stack+0x22/0x50 [ 30.799566] kasan_set_track+0x25/0x30 [ 30.800058] kasan_save_free_info+0x2b/0x50 [ 30.800595] __kasan_slab_free+0x10a/0x190 [ 30.801137] kmem_cache_free+0x10d/0x4d0 [ 30.801642] rcu_core+0x8c8/0x2860 [ 30.802107] __do_softirq+0x1b7/0x7d4 [ 30.802580] [ 30.802798] Last potentially related work creation: [ 30.803383] kasan_save_stack+0x22/0x50 [ 30.803875] __kasan_record_aux_stack+0x8e/0xa0 [ 30.804507] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.805162] remove_vma+0x139/0x170 [ 30.805611] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.806189] do_vmi_munmap+0x1f1/0x2b0 [ 30.806667] __vm_munmap+0x138/0x3a0 [ 30.807126] __x64_sys_munmap+0x59/0x80 [ 30.807616] do_syscall_64+0x3f/0x90 [ 30.808132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808773] [ 30.809020] Second to last potentially related work creation: [ 30.809721] kasan_save_stack+0x22/0x50 [ 30.810234] __kasan_record_aux_stack+0x8e/0xa0 [ 30.810790] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.811426] remove_vma+0x139/0x170 [ 30.811904] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.812471] do_vmi_munmap+0x1f1/0x2b0 [ 30.813010] mmap_region+0x1f9/0x2660 [ 30.813473] do_mmap+0x854/0xf00 [ 30.813928] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.814418] ksys_mmap_pgoff+0x3af/0x500 [ 30.814923] do_syscall_64+0x3f/0x90 [ 30.815386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.816024] [ 30.816242] The buggy address belongs to the object at ffff88800c5961d0 [ 30.816242] which belongs to the cache vm_area_struct of size 168 [ 30.817780] The buggy address is located 88 bytes inside of [ 30.817780] freed 168-byte region [ffff88800c5961d0, ffff88800c596278) [ 30.819259] [ 30.819477] The buggy address belongs to the physical page: [ 30.820149] page:000000000a6fd41b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc596 [ 30.821235] memcg:ffff888010019c01 [ 30.821663] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.822373] page_type: 0xffffffff() [ 30.822846] raw: 0100000000000200 ffff8880087a0c80 ffffea0000318780 dead000000000007 [ 30.823794] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010019c01 [ 30.824710] page dumped because: kasan: bad access detected [ 30.825381] [ 30.825600] Memory state around the buggy address: [ 30.826196] ffff88800c596100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.827058] ffff88800c596180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.827917] >ffff88800c596200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.828785] ^ [ 30.829348] ffff88800c596280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.830240] ffff88800c596300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.831111] ================================================================== [ 30.832070] Disabling lock debugging due to kernel taint [ 33.302921] BUG: Bad rss-counter state mm:00000000483c0064 type:MM_FILEPAGES val:33 [ 33.304074] BUG: Bad rss-counter state mm:00000000483c0064 type:MM_ANONPAGES val:22 [ 33.779828] BUG: Bad rss-counter state mm:000000004982b704 type:MM_FILEPAGES val:33 [ 33.780737] BUG: Bad rss-counter state mm:000000004982b704 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39947' (ECDSA) to the list of known hosts. 2023/06/20 14:56:15 fuzzer started 2023/06/20 14:56:16 dialing manager at localhost:36067 2023/06/20 14:56:16 checking machine... 2023/06/20 14:56:16 checking revisions... [ 34.566343] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:56:16 testing simple program... [ 34.627619] cgroup: Unknown subsys name 'net' [ 34.702100] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:56:15 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888015d97f10 RSI=ffff888015d97ed8 RDI=ffff888015d97758 RBP=ffff888015d90000 RSP=ffff888015d97718 R8 =0000000000000001 R9 =ffff888015d97788 R10=0000000000038001 R11=000000000008aa79 R12=ffff888015d977a8 R13=ffff888015d97790 R14=ffff888015d97ed8 R15=ffff888015d97748 RIP=ffffffff81130930 RFL=00000292 [--S-A--] 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 00007f4ac8ee2900 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=00007ffed54af000 CR3=000000000fc82000 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=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=00007f6b3bda3d50 CR3=000000000cc38000 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=4493b3b1bb142e8d2b4651bc0c1ee28c XMM02=2c67c8bc2e329bc3000000000011a5a0 XMM03=fb795ef6d65770560000000000121a08 XMM04=cfadf267d789cdd300000000000ae988 XMM05=19e9129bd510f2350000000000132b90 XMM06=4fda316b135da52b0000000000132a18 XMM07=e042d86d42eb936e0000000000121c88 XMM08=1191bcd1dcb589e3000000000011a600 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000