syzkaller login: [ 37.036672] BUG: Bad rss-counter state mm:0000000035831ffe type:MM_FILEPAGES val:33 [ 37.038193] BUG: Bad rss-counter state mm:0000000035831ffe type:MM_ANONPAGES val:22 [ 37.212524] ================================================================== [ 37.213602] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.214712] Read of size 8 at addr ffff88800f1345c8 by task sshd/219 [ 37.215661] [ 37.215894] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.216827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.217868] Call Trace: [ 37.218207] [ 37.218508] dump_stack_lvl+0x91/0xf0 [ 37.219028] print_report+0xcc/0x620 [ 37.219547] ? __virt_addr_valid+0x102/0x340 [ 37.220147] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.220808] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.221464] kasan_report+0xbe/0xf0 [ 37.221974] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.222637] vma_interval_tree_remove+0xc75/0xec0 [ 37.223288] vma_prepare+0xc54/0x11a0 [ 37.223795] __split_vma+0x5af/0x950 [ 37.224314] ? __pfx___split_vma+0x10/0x10 [ 37.224881] ? find_held_lock+0x2c/0x110 [ 37.225442] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.226045] ? lock_is_held_type+0x9f/0x120 [ 37.226618] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.227267] ? mtree_range_walk+0x632/0x900 [ 37.227854] ? mas_walk+0x5c7/0x7c0 [ 37.228371] do_vmi_munmap+0x1f1/0x2b0 [ 37.228899] mmap_region+0x1f9/0x2660 [ 37.229413] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.229960] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.230712] ? __pfx_lock_acquire+0x10/0x10 [ 37.231284] ? __pfx_mmap_region+0x10/0x10 [ 37.231852] ? security_mmap_addr+0x7d/0xa0 [ 37.232435] ? get_unmapped_area+0x1f5/0x3f0 [ 37.233016] do_mmap+0x854/0xf00 [ 37.233486] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.234014] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.234618] ksys_mmap_pgoff+0x3af/0x500 [ 37.235159] do_syscall_64+0x3f/0x90 [ 37.235666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.236366] RIP: 0033:0x7f850354dd82 [ 37.236852] 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 [ 37.239120] RSP: 002b:00007fffa71c3848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.240100] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f850354dd82 [ 37.241007] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8502987000 [ 37.241915] RBP: 00007f8502987000 R08: 0000000000000009 R09: 0000000000001000 [ 37.242817] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b39d2bfb20 [ 37.243721] R13: 00007fffa71c3860 R14: 00007fffa71c3890 R15: 00007fffa71c3bf0 [ 37.244636] [ 37.244948] [ 37.245179] Allocated by task 212: [ 37.245635] kasan_save_stack+0x22/0x50 [ 37.246174] kasan_set_track+0x25/0x30 [ 37.246701] __kasan_slab_alloc+0x59/0x70 [ 37.247433] kmem_cache_alloc+0x16b/0x370 [ 37.248189] vm_area_dup+0x20/0x160 [ 37.248757] __split_vma+0x170/0x950 [ 37.249257] split_vma+0xc6/0x110 [ 37.249724] mprotect_fixup+0x8d2/0xb30 [ 37.250261] do_mprotect_pkey+0x87e/0xd40 [ 37.250813] __x64_sys_mprotect+0x78/0xc0 [ 37.251369] do_syscall_64+0x3f/0x90 [ 37.251875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.252572] [ 37.252803] Freed by task 19: [ 37.253215] kasan_save_stack+0x22/0x50 [ 37.253752] kasan_set_track+0x25/0x30 [ 37.254278] kasan_save_free_info+0x2b/0x50 [ 37.254845] __kasan_slab_free+0x10a/0x190 [ 37.255413] kmem_cache_free+0x10d/0x4d0 [ 37.255968] rcu_core+0x8c8/0x2860 [ 37.256446] __do_softirq+0x1b7/0x7d4 [ 37.256956] [ 37.257188] Last potentially related work creation: [ 37.257813] kasan_save_stack+0x22/0x50 [ 37.258350] __kasan_record_aux_stack+0x8e/0xa0 [ 37.258958] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.259647] remove_vma+0x139/0x170 [ 37.260156] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.260754] do_vmi_munmap+0x1f1/0x2b0 [ 37.261274] __vm_munmap+0x138/0x3a0 [ 37.261775] __x64_sys_munmap+0x59/0x80 [ 37.262304] do_syscall_64+0x3f/0x90 [ 37.262807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.263483] [ 37.263712] The buggy address belongs to the object at ffff88800f134570 [ 37.263712] which belongs to the cache vm_area_struct of size 168 [ 37.265287] The buggy address is located 88 bytes inside of [ 37.265287] freed 168-byte region [ffff88800f134570, ffff88800f134618) [ 37.266791] [ 37.267022] The buggy address belongs to the physical page: [ 37.267723] page:000000001a30f0d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf134 [ 37.268916] memcg:ffff88800e669401 [ 37.269373] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.270087] page_type: 0xffffffff() [ 37.270567] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.271548] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e669401 [ 37.272538] page dumped because: kasan: bad access detected [ 37.273247] [ 37.273479] Memory state around the buggy address: [ 37.274102] ffff88800f134480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.275042] ffff88800f134500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 37.275968] >ffff88800f134580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.276887] ^ [ 37.277602] ffff88800f134600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 37.278517] ffff88800f134680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.279439] ================================================================== [ 37.280611] Disabling lock debugging due to kernel taint [ 39.423818] BUG: Bad rss-counter state mm:0000000054887ee7 type:MM_FILEPAGES val:33 [ 39.425021] BUG: Bad rss-counter state mm:0000000054887ee7 type:MM_ANONPAGES val:22 [ 39.907793] BUG: Bad rss-counter state mm:0000000069028af5 type:MM_FILEPAGES val:33 [ 39.908806] BUG: Bad rss-counter state mm:0000000069028af5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34978' (ECDSA) to the list of known hosts. 2023/06/20 07:15:57 fuzzer started 2023/06/20 07:15:57 dialing manager at localhost:44161 2023/06/20 07:15:57 checking machine... 2023/06/20 07:15:57 checking revisions... [ 40.643268] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:15:57 testing simple program... [ 40.690132] cgroup: Unknown subsys name 'net' [ 40.727491] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:15:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f247f58 RCX=0000000000000001 RDX=1ffff1100d9c1351 RSI=ffff88800f247f48 RDI=ffff88806ce09a88 RBP=ffff88800f240000 RSP=ffff88806ce09a08 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88800f247f48 R15=ffff88806ce09a78 RIP=ffffffff81131ca6 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 00007fab30895900 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=00007fab30e4c618 CR3=000000000d712000 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=00007f355d675be0 CR3=000000000f1c0000 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=f311bb4dbd17dc96aa4c92ca4cc25635 XMM02=ec2efd57dc4c00df000000000011dac8 XMM03=ed80c264dff400c4000000000011db98 XMM04=82c1289a3348430a00000000000ae988 XMM05=dfcdbad4f1609c3700000000001343d8 XMM06=5746612875f3883e0000000000133240 XMM07=e042d86d42eb936e0000000000124ac0 XMM08=ed80c264dff400c4000000000011db98 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000