syzkaller login: [ 30.608454] BUG: Bad rss-counter state mm:000000009fd2f97e type:MM_FILEPAGES val:33 [ 30.610052] BUG: Bad rss-counter state mm:000000009fd2f97e type:MM_ANONPAGES val:22 [ 30.788241] ================================================================== [ 30.789197] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.790198] Read of size 8 at addr ffff88801998d3f8 by task sshd/220 [ 30.791133] [ 30.791361] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.792317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.793295] Call Trace: [ 30.793509] [ 30.793687] dump_stack_lvl+0x91/0xf0 [ 30.793995] print_report+0xcc/0x620 [ 30.794300] ? __virt_addr_valid+0x102/0x340 [ 30.794642] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.795026] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.795402] kasan_report+0xbe/0xf0 [ 30.795688] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.796082] vma_interval_tree_remove+0xc75/0xec0 [ 30.796465] vma_prepare+0xc54/0x11a0 [ 30.796772] __split_vma+0x5af/0x950 [ 30.797077] ? __pfx___split_vma+0x10/0x10 [ 30.797416] ? find_held_lock+0x2c/0x110 [ 30.797754] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.798129] ? lock_is_held_type+0x9f/0x120 [ 30.798467] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.798863] ? mtree_range_walk+0x632/0x900 [ 30.799215] ? mas_walk+0x5c7/0x7c0 [ 30.799522] do_vmi_munmap+0x1f1/0x2b0 [ 30.799830] mmap_region+0x1f9/0x2660 [ 30.800137] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.800469] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.800924] ? __pfx_lock_acquire+0x10/0x10 [ 30.801262] ? __pfx_mmap_region+0x10/0x10 [ 30.801621] ? security_mmap_addr+0x7d/0xa0 [ 30.801972] ? get_unmapped_area+0x1f5/0x3f0 [ 30.802314] do_mmap+0x854/0xf00 [ 30.802595] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.802918] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.803269] ksys_mmap_pgoff+0x3af/0x500 [ 30.803602] do_syscall_64+0x3f/0x90 [ 30.803905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.804317] RIP: 0033:0x7fca15ca9d82 [ 30.804622] 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 [ 30.806019] RSP: 002b:00007fffb9cc2108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.806608] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca15ca9d82 [ 30.807142] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca150e3000 [ 30.807647] RBP: 00007fca150e3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.808151] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558533b48f70 [ 30.808663] R13: 00007fffb9cc2120 R14: 00007fffb9cc2150 R15: 00007fffb9cc24b0 [ 30.809171] [ 30.809343] [ 30.809484] Allocated by task 213: [ 30.809747] kasan_save_stack+0x22/0x50 [ 30.810051] kasan_set_track+0x25/0x30 [ 30.810346] __kasan_slab_alloc+0x59/0x70 [ 30.810658] kmem_cache_alloc+0x16b/0x370 [ 30.810968] vm_area_dup+0x20/0x160 [ 30.811242] __split_vma+0x170/0x950 [ 30.811517] split_vma+0xc6/0x110 [ 30.811779] mprotect_fixup+0x8d2/0xb30 [ 30.812083] do_mprotect_pkey+0x87e/0xd40 [ 30.812392] __x64_sys_mprotect+0x78/0xc0 [ 30.812703] do_syscall_64+0x3f/0x90 [ 30.812986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813366] [ 30.813502] Freed by task 203: [ 30.813739] kasan_save_stack+0x22/0x50 [ 30.814041] kasan_set_track+0x25/0x30 [ 30.814338] kasan_save_free_info+0x2b/0x50 [ 30.814656] __kasan_slab_free+0x10a/0x190 [ 30.814974] kmem_cache_free+0x10d/0x4d0 [ 30.815277] rcu_core+0x8c8/0x2860 [ 30.815542] __do_softirq+0x1b7/0x7d4 [ 30.815824] [ 30.815954] Last potentially related work creation: [ 30.816307] kasan_save_stack+0x22/0x50 [ 30.816605] __kasan_record_aux_stack+0x8e/0xa0 [ 30.816947] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.817327] remove_vma+0x139/0x170 [ 30.817604] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.817935] do_vmi_munmap+0x1f1/0x2b0 [ 30.818227] __vm_munmap+0x138/0x3a0 [ 30.818505] __x64_sys_munmap+0x59/0x80 [ 30.818799] do_syscall_64+0x3f/0x90 [ 30.819086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.819469] [ 30.819596] The buggy address belongs to the object at ffff88801998d3a0 [ 30.819596] which belongs to the cache vm_area_struct of size 168 [ 30.820469] The buggy address is located 88 bytes inside of [ 30.820469] freed 168-byte region [ffff88801998d3a0, ffff88801998d448) [ 30.821295] [ 30.821434] The buggy address belongs to the physical page: [ 30.821828] page:0000000025960cfd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1998d [ 30.822493] memcg:ffff88801998e101 [ 30.822767] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.823175] page_type: 0xffffffff() [ 30.823455] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.824004] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801998e101 [ 30.824550] page dumped because: kasan: bad access detected [ 30.824943] [ 30.825073] Memory state around the buggy address: [ 30.825427] ffff88801998d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.825932] ffff88801998d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.826441] >ffff88801998d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.826946] ^ [ 30.827448] ffff88801998d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.827958] ffff88801998d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.828465] ================================================================== [ 30.829162] Disabling lock debugging due to kernel taint [ 32.791462] BUG: Bad rss-counter state mm:0000000002575d57 type:MM_FILEPAGES val:33 [ 32.792716] BUG: Bad rss-counter state mm:0000000002575d57 type:MM_ANONPAGES val:22 [ 33.278023] BUG: Bad rss-counter state mm:000000005f6a7383 type:MM_FILEPAGES val:33 [ 33.279025] BUG: Bad rss-counter state mm:000000005f6a7383 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4100' (ECDSA) to the list of known hosts. 2023/06/20 21:09:22 fuzzer started 2023/06/20 21:09:23 dialing manager at localhost:36067 2023/06/20 21:09:23 checking machine... 2023/06/20 21:09:23 checking revisions... [ 33.927016] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:09:23 testing simple program... [ 33.982382] cgroup: Unknown subsys name 'net' [ 34.022585] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:09:22 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffffffff85652d08 RCX=0000000000000000 RDX=ffff88800e8d8000 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888015d9f420 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000000cc0 RIP=ffffffff84511dca RFL=00000293 [--S-A-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 00007f3f7153f900 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=00007ffe5eeb8000 CR3=000000000ed66000 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=dffffc0000000000 RBX=ffff88806cf09b60 RCX=ffffffff864b3701 RDX=1ffff1100d9e1385 RSI=ffffffff845137d7 RDI=ffff88806cf09b6c RBP=ffff88806cf09c28 RSP=ffff88806cf09a78 R8 =ffffffff864b37a6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b546d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff888016ee2b30 RIP=ffffffff813ad547 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 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=00007fd4d1fcb580 CR3=000000000c766000 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=60d6df07e6e2a0a27b4f39fd19775b65 XMM02=000000000011b630ec2efd57dc4c00df XMM03=00000000001224100c6c5170b4afdbeb XMM04=54a0e938aab04eb500000000000ae988 XMM05=19e9129bd510f23500000000001323c8 XMM06=0c2e9837f01afa980000000000131210 XMM07=e042d86d42eb936e0000000000122690 XMM08=0c6c5170b4afdbeb000000000011b690 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000