syzkaller login: [ 51.717748] BUG: Bad rss-counter state mm:000000001b09edeb type:MM_FILEPAGES val:33 [ 51.718935] BUG: Bad rss-counter state mm:000000001b09edeb type:MM_ANONPAGES val:22 [ 51.874406] ================================================================== [ 51.875464] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.876589] Read of size 8 at addr ffff8880100995c8 by task sshd/221 [ 51.877665] [ 51.877872] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.878674] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.879603] Call Trace: [ 51.879906] [ 51.880177] dump_stack_lvl+0x91/0xf0 [ 51.880644] print_report+0xcc/0x620 [ 51.881096] ? __virt_addr_valid+0x102/0x340 [ 51.881623] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.882208] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.882786] kasan_report+0xbe/0xf0 [ 51.883232] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.883815] vma_interval_tree_remove+0xc75/0xec0 [ 51.884385] vma_prepare+0xc54/0x11a0 [ 51.884849] __split_vma+0x5af/0x950 [ 51.885310] ? __pfx___split_vma+0x10/0x10 [ 51.885830] ? find_held_lock+0x2c/0x110 [ 51.886340] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.886898] ? lock_is_held_type+0x9f/0x120 [ 51.887434] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.888037] ? mtree_range_walk+0x632/0x900 [ 51.888578] ? mas_walk+0x5c7/0x7c0 [ 51.889047] do_vmi_munmap+0x1f1/0x2b0 [ 51.889547] mmap_region+0x1f9/0x2660 [ 51.890030] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.890528] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.891229] ? __pfx_lock_acquire+0x10/0x10 [ 51.891758] ? __pfx_mmap_region+0x10/0x10 [ 51.892273] ? security_mmap_addr+0x7d/0xa0 [ 51.892804] ? get_unmapped_area+0x1f5/0x3f0 [ 51.893338] do_mmap+0x854/0xf00 [ 51.893771] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.894262] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.894810] ksys_mmap_pgoff+0x3af/0x500 [ 51.895302] do_syscall_64+0x3f/0x90 [ 51.895767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.896396] RIP: 0033:0x7fa750b06d82 [ 51.896849] 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 [ 51.898943] RSP: 002b:00007fff4e2d3a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.899825] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa750b06d82 [ 51.900653] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa74ff40000 [ 51.901505] RBP: 00007fa74ff40000 R08: 0000000000000009 R09: 0000000000001000 [ 51.902341] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582b5309ec0 [ 51.903164] R13: 00007fff4e2d3a30 R14: 00007fff4e2d3a60 R15: 00007fff4e2d3dc0 [ 51.904007] [ 51.904290] [ 51.904496] Allocated by task 214: [ 51.904919] kasan_save_stack+0x22/0x50 [ 51.905416] kasan_set_track+0x25/0x30 [ 51.905898] __kasan_slab_alloc+0x59/0x70 [ 51.906408] kmem_cache_alloc+0x16b/0x370 [ 51.906913] vm_area_dup+0x20/0x160 [ 51.907351] __split_vma+0x170/0x950 [ 51.907807] split_vma+0xc6/0x110 [ 51.908237] mprotect_fixup+0x8d2/0xb30 [ 51.908736] do_mprotect_pkey+0x87e/0xd40 [ 51.909242] __x64_sys_mprotect+0x78/0xc0 [ 51.909761] do_syscall_64+0x3f/0x90 [ 51.910220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.910837] [ 51.911051] Freed by task 214: [ 51.911428] kasan_save_stack+0x22/0x50 [ 51.911932] kasan_set_track+0x25/0x30 [ 51.912409] kasan_save_free_info+0x2b/0x50 [ 51.912935] __kasan_slab_free+0x10a/0x190 [ 51.913462] kmem_cache_free+0x10d/0x4d0 [ 51.913972] rcu_core+0x8c8/0x2860 [ 51.914403] __do_softirq+0x1b7/0x7d4 [ 51.914877] [ 51.915083] Last potentially related work creation: [ 51.915664] kasan_save_stack+0x22/0x50 [ 51.916155] __kasan_record_aux_stack+0x8e/0xa0 [ 51.916719] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.917349] remove_vma+0x139/0x170 [ 51.917808] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.918455] do_vmi_munmap+0x1f1/0x2b0 [ 51.918924] __vm_munmap+0x138/0x3a0 [ 51.919370] __x64_sys_munmap+0x59/0x80 [ 51.919853] do_syscall_64+0x3f/0x90 [ 51.920320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.920951] [ 51.921159] The buggy address belongs to the object at ffff888010099570 [ 51.921159] which belongs to the cache vm_area_struct of size 168 [ 51.922613] The buggy address is located 88 bytes inside of [ 51.922613] freed 168-byte region [ffff888010099570, ffff888010099618) [ 51.924002] [ 51.924211] The buggy address belongs to the physical page: [ 51.924859] page:00000000c47aad1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10099 [ 51.925920] memcg:ffff88800e3ca301 [ 51.926340] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.926977] page_type: 0xffffffff() [ 51.927409] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 51.928313] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3ca301 [ 51.929202] page dumped because: kasan: bad access detected [ 51.929858] [ 51.930073] Memory state around the buggy address: [ 51.930642] ffff888010099480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.931484] ffff888010099500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 51.932317] >ffff888010099580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.933148] ^ [ 51.933803] ffff888010099600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 51.934648] ffff888010099680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.935466] ================================================================== [ 51.936350] Disabling lock debugging due to kernel taint [ 53.980939] BUG: Bad rss-counter state mm:00000000b118f2da type:MM_FILEPAGES val:33 [ 53.981941] BUG: Bad rss-counter state mm:00000000b118f2da type:MM_ANONPAGES val:22 [ 54.457820] BUG: Bad rss-counter state mm:000000000cb4a60e type:MM_FILEPAGES val:33 [ 54.458744] BUG: Bad rss-counter state mm:000000000cb4a60e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6134' (ECDSA) to the list of known hosts. 2023/06/19 20:57:36 fuzzer started 2023/06/19 20:57:37 dialing manager at localhost:44161 2023/06/19 20:57:37 checking machine... 2023/06/19 20:57:37 checking revisions... [ 55.172487] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:57:37 testing simple program... [ 55.231674] cgroup: Unknown subsys name 'net' [ 55.286770] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:57:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff846000aa RCX=0000000000000001 RDX=1ffff11002d1af0d RSI=ffff8880168d7f48 RDI=ffffffff846000aa RBP=ffffffff846000aa RSP=ffff8880168d77b8 R8 =0000000000000001 R9 =ffff8880168d7850 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880168d78d8 R13=0000000000000000 R14=ffff8880169db680 R15=ffff888018eb7850 RIP=ffffffff811fc6f7 RFL=00000282 [--S----] 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 00007ff425a9b900 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=00007ff426052618 CR3=00000000147bc000 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=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=00007f65a88ee6d0 CR3=000000000c5bc000 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=7310a34cb73e8e9f6d474e155dc0ff37 XMM02=000000000011c820ec2efd57dc4c00df XMM03=0000000000123a289d4f067f9bb665ea XMM04=77a6329be00657e900000000000ae988 XMM05=e4cb8bb95a7664b60000000000133890 XMM06=2c635186b02986ea00000000001326f8 XMM07=e042d86d42eb936e0000000000123ca8 XMM08=9d4f067f9bb665ea000000000011c880 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000