syzkaller login: [ 34.050331] BUG: Bad rss-counter state mm:0000000038de15d0 type:MM_FILEPAGES val:33 [ 34.052112] BUG: Bad rss-counter state mm:0000000038de15d0 type:MM_ANONPAGES val:22 [ 34.248210] ================================================================== [ 34.249204] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.250207] Read of size 8 at addr ffff88800edda880 by task sshd/221 [ 34.251149] [ 34.251382] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.252301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.253369] Call Trace: [ 34.253708] [ 34.254015] dump_stack_lvl+0x91/0xf0 [ 34.254537] print_report+0xcc/0x620 [ 34.255055] ? __virt_addr_valid+0x102/0x340 [ 34.255644] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.256299] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.256963] kasan_report+0xbe/0xf0 [ 34.257495] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.258168] vma_interval_tree_remove+0xc75/0xec0 [ 34.258828] vma_prepare+0xc54/0x11a0 [ 34.259358] __split_vma+0x5af/0x950 [ 34.259867] ? __pfx___split_vma+0x10/0x10 [ 34.260447] ? find_held_lock+0x2c/0x110 [ 34.261025] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.261633] ? lock_is_held_type+0x9f/0x120 [ 34.262208] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.262875] ? mtree_range_walk+0x632/0x900 [ 34.263478] ? mas_walk+0x5c7/0x7c0 [ 34.263987] do_vmi_munmap+0x1f1/0x2b0 [ 34.264527] mmap_region+0x1f9/0x2660 [ 34.265059] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.265618] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.266399] ? __pfx_lock_acquire+0x10/0x10 [ 34.266977] ? __pfx_mmap_region+0x10/0x10 [ 34.267560] ? security_mmap_addr+0x7d/0xa0 [ 34.268138] ? get_unmapped_area+0x1f5/0x3f0 [ 34.268740] do_mmap+0x854/0xf00 [ 34.269230] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.269771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.270389] ksys_mmap_pgoff+0x3af/0x500 [ 34.270941] do_syscall_64+0x3f/0x90 [ 34.271464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.272166] RIP: 0033:0x7f5ccfaa3d82 [ 34.272669] 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 [ 34.275041] RSP: 002b:00007ffc639f85a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.276031] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ccfaa3d82 [ 34.277001] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5cceedd000 [ 34.277940] RBP: 00007f5cceedd000 R08: 0000000000000009 R09: 0000000000001000 [ 34.278882] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6e7ae4ec0 [ 34.279799] R13: 00007ffc639f85c0 R14: 00007ffc639f85f0 R15: 00007ffc639f8950 [ 34.280739] [ 34.281070] [ 34.281309] Allocated by task 211: [ 34.281788] kasan_save_stack+0x22/0x50 [ 34.282346] kasan_set_track+0x25/0x30 [ 34.282893] __kasan_slab_alloc+0x59/0x70 [ 34.283472] kmem_cache_alloc+0x16b/0x370 [ 34.284053] vm_area_dup+0x20/0x160 [ 34.284558] __split_vma+0x170/0x950 [ 34.285093] split_vma+0xc6/0x110 [ 34.285579] mprotect_fixup+0x8d2/0xb30 [ 34.286132] do_mprotect_pkey+0x87e/0xd40 [ 34.286710] __x64_sys_mprotect+0x78/0xc0 [ 34.287282] do_syscall_64+0x3f/0x90 [ 34.287804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.288513] [ 34.288749] Freed by task 211: [ 34.289203] kasan_save_stack+0x22/0x50 [ 34.289758] kasan_set_track+0x25/0x30 [ 34.290299] kasan_save_free_info+0x2b/0x50 [ 34.290886] __kasan_slab_free+0x10a/0x190 [ 34.291475] kmem_cache_free+0x10d/0x4d0 [ 34.292047] rcu_core+0x8c8/0x2860 [ 34.292543] __do_softirq+0x1b7/0x7d4 [ 34.293088] [ 34.293327] Last potentially related work creation: [ 34.293968] kasan_save_stack+0x22/0x50 [ 34.294523] __kasan_record_aux_stack+0x8e/0xa0 [ 34.295154] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.295860] remove_vma+0x139/0x170 [ 34.296359] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.296972] do_vmi_munmap+0x1f1/0x2b0 [ 34.297532] __vm_munmap+0x138/0x3a0 [ 34.298055] __x64_sys_munmap+0x59/0x80 [ 34.298608] do_syscall_64+0x3f/0x90 [ 34.299132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.299872] [ 34.300114] The buggy address belongs to the object at ffff88800edda828 [ 34.300114] which belongs to the cache vm_area_struct of size 168 [ 34.301756] The buggy address is located 88 bytes inside of [ 34.301756] freed 168-byte region [ffff88800edda828, ffff88800edda8d0) [ 34.303321] [ 34.303562] The buggy address belongs to the physical page: [ 34.304295] page:000000004dcf2919 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedda [ 34.305518] memcg:ffff88800d168301 [ 34.306001] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.306772] page_type: 0xffffffff() [ 34.307274] raw: 0100000000000200 ffff88800879fc80 ffffea00003b2740 dead000000000007 [ 34.308310] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d168301 [ 34.309339] page dumped because: kasan: bad access detected [ 34.310083] [ 34.310320] Memory state around the buggy address: [ 34.310969] ffff88800edda780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.311934] ffff88800edda800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.312890] >ffff88800edda880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.313842] ^ [ 34.314301] ffff88800edda900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.315261] ffff88800edda980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 34.316210] ================================================================== [ 34.317349] Disabling lock debugging due to kernel taint [ 36.238287] BUG: Bad rss-counter state mm:000000008a266952 type:MM_FILEPAGES val:33 [ 36.239547] BUG: Bad rss-counter state mm:000000008a266952 type:MM_ANONPAGES val:22 [ 36.721617] BUG: Bad rss-counter state mm:00000000bf54d5ff type:MM_FILEPAGES val:33 [ 36.722821] BUG: Bad rss-counter state mm:00000000bf54d5ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53019' (ECDSA) to the list of known hosts. 2023/06/20 03:32:02 fuzzer started 2023/06/20 03:32:02 dialing manager at localhost:44161 2023/06/20 03:32:02 checking machine... 2023/06/20 03:32:02 checking revisions... [ 37.467220] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:32:02 testing simple program... [ 37.510789] cgroup: Unknown subsys name 'net' [ 37.569110] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:31:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880164d3680 RSI=ffffffff81f366f9 RDI=ffffffff8560b640 RBP=dffffc0000000000 RSP=ffff8880162cf950 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000001 R14=ffff8880162cfc20 R15=0000000000000000 RIP=ffffffff812d8610 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 00007f5e2fab1900 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=00007f5e300690b0 CR3=000000001b952000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c58400 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=00007f3ba1e990a0 CR3=0000000009a90000 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=320ba980b0c5a19af94bd4743ddc2ab8 XMM02=2c67c8bc2e329bc3000000000011d2d8 XMM03=fb795ef6d65770560000000000124468 XMM04=67ac8ec169aa0a0000000000000ae988 XMM05=19e9129bd510f2350000000000134828 XMM06=9a2a7cdb5c6269280000000000133690 XMM07=e042d86d42eb936e00000000001246e8 XMM08=188ddaf89f0a4677000000000011d338 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000