syzkaller login: [ 30.677342] BUG: Bad rss-counter state mm:0000000097e1c580 type:MM_FILEPAGES val:33 [ 30.678551] BUG: Bad rss-counter state mm:0000000097e1c580 type:MM_ANONPAGES val:22 [ 30.709628] ================================================================== [ 30.710474] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.711194] Read of size 8 at addr ffff888017c44a50 by task sshd/220 [ 30.711775] [ 30.711938] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.712598] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.713588] Call Trace: [ 30.713830] [ 30.714046] dump_stack_lvl+0x91/0xf0 [ 30.714426] print_report+0xcc/0x620 [ 30.714794] ? __virt_addr_valid+0x102/0x340 [ 30.715215] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.716042] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.716817] kasan_report+0xbe/0xf0 [ 30.717435] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.718208] vma_interval_tree_remove+0xc75/0xec0 [ 30.718954] vma_prepare+0xc54/0x11a0 [ 30.719553] __split_vma+0x5af/0x950 [ 30.720142] ? __pfx___split_vma+0x10/0x10 [ 30.720802] ? find_held_lock+0x2c/0x110 [ 30.721497] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.722135] ? lock_is_held_type+0x9f/0x120 [ 30.722728] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.723400] ? mtree_range_walk+0x632/0x900 [ 30.724001] ? mas_walk+0x5c7/0x7c0 [ 30.724526] do_vmi_munmap+0x1f1/0x2b0 [ 30.725097] mmap_region+0x1f9/0x2660 [ 30.725632] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.726141] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.726866] ? __pfx_lock_acquire+0x10/0x10 [ 30.727403] ? __pfx_mmap_region+0x10/0x10 [ 30.727942] ? security_mmap_addr+0x7d/0xa0 [ 30.728484] ? get_unmapped_area+0x1f5/0x3f0 [ 30.729060] do_mmap+0x854/0xf00 [ 30.729502] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.729990] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.730559] ksys_mmap_pgoff+0x3af/0x500 [ 30.731073] do_syscall_64+0x3f/0x90 [ 30.731562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.732230] RIP: 0033:0x7f164ee4fd82 [ 30.732687] 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 [ 30.734832] RSP: 002b:00007ffc98d858c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.735748] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f164ee4fd82 [ 30.736586] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f164e289000 [ 30.737447] RBP: 00007f164e289000 R08: 0000000000000009 R09: 0000000000001000 [ 30.738286] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d7adb05f60 [ 30.739122] R13: 00007ffc98d858e0 R14: 00007ffc98d85910 R15: 00007ffc98d85c70 [ 30.739969] [ 30.740258] [ 30.740473] Allocated by task 213: [ 30.740925] kasan_save_stack+0x22/0x50 [ 30.741435] kasan_set_track+0x25/0x30 [ 30.741932] __kasan_slab_alloc+0x59/0x70 [ 30.742455] kmem_cache_alloc+0x16b/0x370 [ 30.742969] vm_area_dup+0x20/0x160 [ 30.743421] __split_vma+0x170/0x950 [ 30.743897] split_vma+0xc6/0x110 [ 30.744333] mprotect_fixup+0x8d2/0xb30 [ 30.744837] do_mprotect_pkey+0x87e/0xd40 [ 30.745375] __x64_sys_mprotect+0x78/0xc0 [ 30.745903] do_syscall_64+0x3f/0x90 [ 30.746376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.747021] [ 30.747243] Freed by task 213: [ 30.747635] kasan_save_stack+0x22/0x50 [ 30.748137] kasan_set_track+0x25/0x30 [ 30.748636] kasan_save_free_info+0x2b/0x50 [ 30.749184] __kasan_slab_free+0x10a/0x190 [ 30.749712] kmem_cache_free+0x10d/0x4d0 [ 30.750219] rcu_core+0x8c8/0x2860 [ 30.750663] __do_softirq+0x1b7/0x7d4 [ 30.751135] [ 30.751350] Last potentially related work creation: [ 30.751939] kasan_save_stack+0x22/0x50 [ 30.752451] __kasan_record_aux_stack+0x8e/0xa0 [ 30.753052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.753702] remove_vma+0x139/0x170 [ 30.754165] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.754724] do_vmi_munmap+0x1f1/0x2b0 [ 30.755210] __vm_munmap+0x138/0x3a0 [ 30.755682] __x64_sys_munmap+0x59/0x80 [ 30.756185] do_syscall_64+0x3f/0x90 [ 30.756663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757326] [ 30.757545] The buggy address belongs to the object at ffff888017c449f8 [ 30.757545] which belongs to the cache vm_area_struct of size 168 [ 30.759018] The buggy address is located 88 bytes inside of [ 30.759018] freed 168-byte region [ffff888017c449f8, ffff888017c44aa0) [ 30.760452] [ 30.760673] The buggy address belongs to the physical page: [ 30.761361] page:00000000a17b19da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c44 [ 30.762443] memcg:ffff888015ff3901 [ 30.762868] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.763503] page_type: 0xffffffff() [ 30.763954] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.764871] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ff3901 [ 30.765781] page dumped because: kasan: bad access detected [ 30.766441] [ 30.766654] Memory state around the buggy address: [ 30.767234] ffff888017c44900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.768101] ffff888017c44980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.768998] >ffff888017c44a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.769880] ^ [ 30.770598] ffff888017c44a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.771462] ffff888017c44b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.772313] ================================================================== [ 30.773491] Disabling lock debugging due to kernel taint [ 32.712252] BUG: Bad rss-counter state mm:00000000986440b4 type:MM_FILEPAGES val:33 [ 32.713279] BUG: Bad rss-counter state mm:00000000986440b4 type:MM_ANONPAGES val:22 [ 33.196718] BUG: Bad rss-counter state mm:00000000fcf3b876 type:MM_FILEPAGES val:33 [ 33.197903] BUG: Bad rss-counter state mm:00000000fcf3b876 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61695' (ECDSA) to the list of known hosts. 2023/06/20 17:27:37 fuzzer started 2023/06/20 17:27:37 dialing manager at localhost:36067 2023/06/20 17:27:37 checking machine... 2023/06/20 17:27:37 checking revisions... [ 33.916738] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:27:37 testing simple program... [ 33.962790] cgroup: Unknown subsys name 'net' [ 34.009033] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:27:36 Registers: info registers vcpu 0 RAX=ffff88800df87b28 RBX=ffff88800df87b18 RCX=1ffff11001a45a60 RDX=dffffc0000000000 RSI=ffff88800c9c8d90 RDI=ffff88800df87b48 RBP=ffff88800df87b28 RSP=ffff8880161779c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800c9c8d80 R13=0000000000000000 R14=ffff88801637ce88 R15=ffff88801637ce40 RIP=ffffffff818476ba RFL=00000002 [-------] 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 00007f373fe21900 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=00007ffd971a3000 CR3=0000000016178000 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=ffff888008c04400 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=00007f6ffbe88aa0 CR3=000000000cbec000 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=304a08d19079e08e1a40578862e2b549 XMM02=000000000011cdc8eff9b2d0a8fce9cb XMM03=000000000011ce982c67c8bc2e329bc3 XMM04=f2133c8772b2531b00000000000ae988 XMM05=19e9129bd510f2350000000000131340 XMM06=5b2dd75a4e34b31400000000001301a8 XMM07=e042d86d42eb936e0000000000121780 XMM08=d5875c03fb8805df000000000011ce98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000