syzkaller login: [ 30.297981] BUG: Bad rss-counter state mm:000000006ccd0ea1 type:MM_FILEPAGES val:33 [ 30.298987] BUG: Bad rss-counter state mm:000000006ccd0ea1 type:MM_ANONPAGES val:22 [ 30.435854] ================================================================== [ 30.436804] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.437799] Read of size 8 at addr ffff888017bf06b0 by task sshd/220 [ 30.438592] [ 30.438819] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.439903] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.440938] Call Trace: [ 30.441274] [ 30.441579] dump_stack_lvl+0x91/0xf0 [ 30.442170] print_report+0xcc/0x620 [ 30.442694] ? __virt_addr_valid+0x102/0x340 [ 30.443273] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.443917] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.444579] kasan_report+0xbe/0xf0 [ 30.445082] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.445757] vma_interval_tree_remove+0xc75/0xec0 [ 30.446385] vma_prepare+0xc54/0x11a0 [ 30.446889] __split_vma+0x5af/0x950 [ 30.447387] ? __pfx___split_vma+0x10/0x10 [ 30.447935] ? find_held_lock+0x2c/0x110 [ 30.448474] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.449057] ? lock_is_held_type+0x9f/0x120 [ 30.449616] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.450270] ? mtree_range_walk+0x632/0x900 [ 30.450847] ? mas_walk+0x5c7/0x7c0 [ 30.451343] do_vmi_munmap+0x1f1/0x2b0 [ 30.451859] mmap_region+0x1f9/0x2660 [ 30.452365] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.452888] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.453627] ? __pfx_lock_acquire+0x10/0x10 [ 30.454214] ? __pfx_mmap_region+0x10/0x10 [ 30.454767] ? security_mmap_addr+0x7d/0xa0 [ 30.455318] ? get_unmapped_area+0x1f5/0x3f0 [ 30.455891] do_mmap+0x854/0xf00 [ 30.456345] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.456859] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.457446] ksys_mmap_pgoff+0x3af/0x500 [ 30.457984] do_syscall_64+0x3f/0x90 [ 30.458485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.459157] RIP: 0033:0x7efd09dadd82 [ 30.459635] 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 [ 30.461867] RSP: 002b:00007ffeed1b3ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.462802] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd09dadd82 [ 30.463681] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd091e7000 [ 30.464545] RBP: 00007efd091e7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.465426] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560523a2b20 [ 30.466307] R13: 00007ffeed1b3b00 R14: 00007ffeed1b3b30 R15: 00007ffeed1b3e90 [ 30.467188] [ 30.467493] [ 30.467712] Allocated by task 213: [ 30.468150] kasan_save_stack+0x22/0x50 [ 30.468675] kasan_set_track+0x25/0x30 [ 30.469185] __kasan_slab_alloc+0x59/0x70 [ 30.469728] kmem_cache_alloc+0x16b/0x370 [ 30.470265] vm_area_dup+0x20/0x160 [ 30.470737] __split_vma+0x170/0x950 [ 30.471218] split_vma+0xc6/0x110 [ 30.471675] mprotect_fixup+0x8d2/0xb30 [ 30.472191] do_mprotect_pkey+0x87e/0xd40 [ 30.472732] __x64_sys_mprotect+0x78/0xc0 [ 30.473271] do_syscall_64+0x3f/0x90 [ 30.473780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.474446] [ 30.474666] Freed by task 213: [ 30.475073] kasan_save_stack+0x22/0x50 [ 30.475593] kasan_set_track+0x25/0x30 [ 30.476106] kasan_save_free_info+0x2b/0x50 [ 30.476660] __kasan_slab_free+0x10a/0x190 [ 30.477211] kmem_cache_free+0x10d/0x4d0 [ 30.477772] rcu_core+0x8c8/0x2860 [ 30.478235] __do_softirq+0x1b7/0x7d4 [ 30.478737] [ 30.478962] Last potentially related work creation: [ 30.479568] kasan_save_stack+0x22/0x50 [ 30.480087] __kasan_record_aux_stack+0x8e/0xa0 [ 30.480729] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.481417] remove_vma+0x139/0x170 [ 30.481896] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.482477] do_vmi_munmap+0x1f1/0x2b0 [ 30.482980] __vm_munmap+0x138/0x3a0 [ 30.483464] __x64_sys_munmap+0x59/0x80 [ 30.483983] do_syscall_64+0x3f/0x90 [ 30.484470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.485135] [ 30.485354] The buggy address belongs to the object at ffff888017bf0658 [ 30.485354] which belongs to the cache vm_area_struct of size 168 [ 30.486877] The buggy address is located 88 bytes inside of [ 30.486877] freed 168-byte region [ffff888017bf0658, ffff888017bf0700) [ 30.488342] [ 30.488573] The buggy address belongs to the physical page: [ 30.489257] page:000000005e43ac26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17bf0 [ 30.490396] memcg:ffff88800d789001 [ 30.490833] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.491500] page_type: 0xffffffff() [ 30.491967] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.492914] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d789001 [ 30.493862] page dumped because: kasan: bad access detected [ 30.494560] [ 30.494779] Memory state around the buggy address: [ 30.495367] ffff888017bf0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.496239] ffff888017bf0600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.497126] >ffff888017bf0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.498032] ^ [ 30.498644] ffff888017bf0700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.499527] ffff888017bf0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.500399] ================================================================== [ 30.501448] Disabling lock debugging due to kernel taint [ 32.066626] BUG: Bad rss-counter state mm:00000000786e8c01 type:MM_FILEPAGES val:33 [ 32.067785] BUG: Bad rss-counter state mm:00000000786e8c01 type:MM_ANONPAGES val:22 [ 32.514945] BUG: Bad rss-counter state mm:0000000030e88f0b type:MM_FILEPAGES val:33 [ 32.516295] BUG: Bad rss-counter state mm:0000000030e88f0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34015' (ECDSA) to the list of known hosts. 2023/06/20 23:51:33 fuzzer started 2023/06/20 23:51:33 dialing manager at localhost:36067 2023/06/20 23:51:34 checking machine... 2023/06/20 23:51:34 checking revisions... [ 33.226355] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:51:34 testing simple program... [ 33.281720] cgroup: Unknown subsys name 'net' [ 33.321500] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:51:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800cc61390 RCX=ffff88800cc61390 RDX=00000000800d000c RSI=ffff88800cc61390 RDI=ffff88800844f780 RBP=ffff88800cbffa28 RSP=ffff88800cbff990 R8 =00000000800d000b R9 =0000000000000000 R10=ffffea0000331840 R11=00000000800c0006 R12=ffffea0000331840 R13=ffff88800cc61720 R14=00000000800d000b R15=ffff88800844f780 RIP=ffffffff81809672 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 00007fa6b6971900 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=00007ffd0cc9d000 CR3=000000000c500000 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=00007fa042026100 CR3=000000000f32c000 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=2033333a31353a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a31353a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000