syzkaller login: [ 30.468821] BUG: Bad rss-counter state mm:000000000cf43eda type:MM_FILEPAGES val:33 [ 30.470144] BUG: Bad rss-counter state mm:000000000cf43eda type:MM_ANONPAGES val:22 [ 30.496290] ================================================================== [ 30.496788] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.497336] Read of size 8 at addr ffff888010344140 by task sshd/220 [ 30.497777] [ 30.497907] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.498374] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.498899] Call Trace: [ 30.499073] [ 30.499229] dump_stack_lvl+0x91/0xf0 [ 30.499503] print_report+0xcc/0x620 [ 30.499763] ? __virt_addr_valid+0x102/0x340 [ 30.500066] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.500407] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.500746] kasan_report+0xbe/0xf0 [ 30.501063] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.501407] vma_interval_tree_remove+0xc75/0xec0 [ 30.501732] vma_prepare+0xc54/0x11a0 [ 30.502010] __split_vma+0x5af/0x950 [ 30.502268] ? __pfx___split_vma+0x10/0x10 [ 30.502553] ? find_held_lock+0x2c/0x110 [ 30.502833] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.503150] ? lock_is_held_type+0x9f/0x120 [ 30.503442] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.503779] ? mtree_range_walk+0x632/0x900 [ 30.504084] ? mas_walk+0x5c7/0x7c0 [ 30.504343] do_vmi_munmap+0x1f1/0x2b0 [ 30.504617] mmap_region+0x1f9/0x2660 [ 30.504882] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.505157] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.505545] ? __pfx_lock_acquire+0x10/0x10 [ 30.505841] ? __pfx_mmap_region+0x10/0x10 [ 30.506117] ? security_mmap_addr+0x7d/0xa0 [ 30.506394] ? get_unmapped_area+0x1f5/0x3f0 [ 30.506680] do_mmap+0x854/0xf00 [ 30.506909] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.507168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.507460] ksys_mmap_pgoff+0x3af/0x500 [ 30.507726] do_syscall_64+0x3f/0x90 [ 30.507980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.508320] RIP: 0033:0x7f4e92b6ad82 [ 30.508566] 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 [ 30.509676] RSP: 002b:00007ffe3d518d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.510155] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e92b6ad82 [ 30.510600] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e91fa4000 [ 30.511042] RBP: 00007f4e91fa4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.511488] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ae0c5cec0 [ 30.511935] R13: 00007ffe3d518d60 R14: 00007ffe3d518d90 R15: 00007ffe3d5190f0 [ 30.512384] [ 30.512539] [ 30.512652] Allocated by task 213: [ 30.512878] kasan_save_stack+0x22/0x50 [ 30.513143] kasan_set_track+0x25/0x30 [ 30.513404] __kasan_slab_alloc+0x59/0x70 [ 30.513679] kmem_cache_alloc+0x16b/0x370 [ 30.513963] vm_area_dup+0x20/0x160 [ 30.514203] __split_vma+0x170/0x950 [ 30.514453] split_vma+0xc6/0x110 [ 30.514691] mprotect_fixup+0x8d2/0xb30 [ 30.514970] do_mprotect_pkey+0x87e/0xd40 [ 30.515254] __x64_sys_mprotect+0x78/0xc0 [ 30.515542] do_syscall_64+0x3f/0x90 [ 30.515811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.516168] [ 30.516291] Freed by task 13: [ 30.516510] kasan_save_stack+0x22/0x50 [ 30.516786] kasan_set_track+0x25/0x30 [ 30.517052] kasan_save_free_info+0x2b/0x50 [ 30.517346] __kasan_slab_free+0x10a/0x190 [ 30.517636] kmem_cache_free+0x10d/0x4d0 [ 30.517921] rcu_core+0x8c8/0x2860 [ 30.518165] __do_softirq+0x1b7/0x7d4 [ 30.518421] [ 30.518543] Last potentially related work creation: [ 30.518867] kasan_save_stack+0x22/0x50 [ 30.519143] __kasan_record_aux_stack+0x8e/0xa0 [ 30.519452] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.519803] remove_vma+0x139/0x170 [ 30.520048] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.520352] do_vmi_munmap+0x1f1/0x2b0 [ 30.520612] __vm_munmap+0x138/0x3a0 [ 30.520868] __x64_sys_munmap+0x59/0x80 [ 30.521143] do_syscall_64+0x3f/0x90 [ 30.521402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.521755] [ 30.521887] The buggy address belongs to the object at ffff8880103440e8 [ 30.521887] which belongs to the cache vm_area_struct of size 168 [ 30.522688] The buggy address is located 88 bytes inside of [ 30.522688] freed 168-byte region [ffff8880103440e8, ffff888010344190) [ 30.523444] [ 30.523562] The buggy address belongs to the physical page: [ 30.523923] page:00000000c14b4a02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10344 [ 30.524520] memcg:ffff88800ce53301 [ 30.524750] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.525099] page_type: 0xffffffff() [ 30.525342] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.525860] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce53301 [ 30.526353] page dumped because: kasan: bad access detected [ 30.526718] [ 30.526836] Memory state around the buggy address: [ 30.527150] ffff888010344000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.527616] ffff888010344080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.528082] >ffff888010344100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.528544] ^ [ 30.528894] ffff888010344180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.529359] ffff888010344200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.529830] ================================================================== [ 30.530508] Disabling lock debugging due to kernel taint [ 32.433438] BUG: Bad rss-counter state mm:00000000de6c95d9 type:MM_FILEPAGES val:33 [ 32.434424] BUG: Bad rss-counter state mm:00000000de6c95d9 type:MM_ANONPAGES val:22 [ 32.993075] BUG: Bad rss-counter state mm:00000000e9c74021 type:MM_FILEPAGES val:33 [ 32.994383] BUG: Bad rss-counter state mm:00000000e9c74021 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46083' (ECDSA) to the list of known hosts. 2023/06/21 09:38:28 fuzzer started 2023/06/21 09:38:29 dialing manager at localhost:36067 2023/06/21 09:38:29 checking machine... 2023/06/21 09:38:29 checking revisions... [ 33.673246] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:38:29 testing simple program... [ 33.723116] cgroup: Unknown subsys name 'net' [ 33.776713] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:38:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff87b6a200 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806ce361a0 RBP=ffff88806ce361a0 RSP=ffff88806ce09d60 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6d53 R12=0000000000000200 R13=00000000000361a0 R14=0000000000000001 R15=ffff88800fa24000 RIP=ffffffff812d8e70 RFL=00000086 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f46280a6900 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=000056287f12dfd4 CR3=0000000016efe000 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=0000000000000000000056287ea06060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffff239bff8 CR3=0000000005482000 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=00007fe2786635100000563167800790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000