syzkaller login: [ 70.678948] BUG: Bad rss-counter state mm:0000000069f1099f type:MM_FILEPAGES val:33 [ 70.680179] BUG: Bad rss-counter state mm:0000000069f1099f type:MM_ANONPAGES val:22 [ 70.719580] ================================================================== [ 70.720535] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.721633] Read of size 8 at addr ffff8880158a15c8 by task sshd/228 [ 70.722408] [ 70.722632] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 70.723533] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.724521] Call Trace: [ 70.724846] [ 70.725133] dump_stack_lvl+0x91/0xf0 [ 70.725632] print_report+0xcc/0x620 [ 70.726125] ? __virt_addr_valid+0x102/0x340 [ 70.726684] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.727317] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.727944] kasan_report+0xbe/0xf0 [ 70.728427] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.729058] vma_interval_tree_remove+0xc75/0xec0 [ 70.729671] vma_prepare+0xc54/0x11a0 [ 70.730156] __split_vma+0x5af/0x950 [ 70.730633] ? __pfx___split_vma+0x10/0x10 [ 70.731194] ? find_held_lock+0x2c/0x110 [ 70.731720] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.732294] ? lock_is_held_type+0x9f/0x120 [ 70.732838] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.733467] ? mtree_range_walk+0x632/0x900 [ 70.734027] ? mas_walk+0x5c7/0x7c0 [ 70.734510] do_vmi_munmap+0x1f1/0x2b0 [ 70.735039] mmap_region+0x1f9/0x2660 [ 70.735525] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.736052] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.736784] ? __pfx_lock_acquire+0x10/0x10 [ 70.737325] ? __pfx_mmap_region+0x10/0x10 [ 70.737863] ? security_mmap_addr+0x7d/0xa0 [ 70.738403] ? get_unmapped_area+0x1f5/0x3f0 [ 70.738955] do_mmap+0x854/0xf00 [ 70.739413] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.739918] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.740489] ksys_mmap_pgoff+0x3af/0x500 [ 70.740998] do_syscall_64+0x3f/0x90 [ 70.741479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.742135] RIP: 0033:0x7fb7e6eaad82 [ 70.742600] 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 [ 70.744797] RSP: 002b:00007fff286427d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.745722] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7e6eaad82 [ 70.746589] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7e62e4000 [ 70.747449] RBP: 00007fb7e62e4000 R08: 0000000000000009 R09: 0000000000001000 [ 70.748295] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559bfe98d90 [ 70.749139] R13: 00007fff286427f0 R14: 00007fff28642820 R15: 00007fff28642b80 [ 70.750010] [ 70.750308] [ 70.750529] Allocated by task 221: [ 70.750960] kasan_save_stack+0x22/0x50 [ 70.751513] kasan_set_track+0x25/0x30 [ 70.752016] __kasan_slab_alloc+0x59/0x70 [ 70.752547] kmem_cache_alloc+0x16b/0x370 [ 70.753069] vm_area_dup+0x20/0x160 [ 70.753527] __split_vma+0x170/0x950 [ 70.754004] split_vma+0xc6/0x110 [ 70.754444] mprotect_fixup+0x8d2/0xb30 [ 70.754950] do_mprotect_pkey+0x87e/0xd40 [ 70.755493] __x64_sys_mprotect+0x78/0xc0 [ 70.756014] do_syscall_64+0x3f/0x90 [ 70.756490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.757131] [ 70.757345] Freed by task 221: [ 70.757741] kasan_save_stack+0x22/0x50 [ 70.758244] kasan_set_track+0x25/0x30 [ 70.758738] kasan_save_free_info+0x2b/0x50 [ 70.759272] __kasan_slab_free+0x10a/0x190 [ 70.759813] kmem_cache_free+0x10d/0x4d0 [ 70.760327] rcu_core+0x8c8/0x2860 [ 70.760768] __do_softirq+0x1b7/0x7d4 [ 70.761243] [ 70.761461] Last potentially related work creation: [ 70.762044] kasan_save_stack+0x22/0x50 [ 70.762557] __kasan_record_aux_stack+0x8e/0xa0 [ 70.763134] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.763773] remove_vma+0x139/0x170 [ 70.764225] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.764784] do_vmi_munmap+0x1f1/0x2b0 [ 70.765269] __vm_munmap+0x138/0x3a0 [ 70.765739] __x64_sys_munmap+0x59/0x80 [ 70.766235] do_syscall_64+0x3f/0x90 [ 70.766711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.767369] [ 70.767582] The buggy address belongs to the object at ffff8880158a1570 [ 70.767582] which belongs to the cache vm_area_struct of size 168 [ 70.769048] The buggy address is located 88 bytes inside of [ 70.769048] freed 168-byte region [ffff8880158a1570, ffff8880158a1618) [ 70.770442] [ 70.770656] The buggy address belongs to the physical page: [ 70.771323] page:00000000b567c77e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158a1 [ 70.772400] memcg:ffff88800e645501 [ 70.772821] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.773464] page_type: 0xffffffff() [ 70.773908] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 70.774818] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e645501 [ 70.775731] page dumped because: kasan: bad access detected [ 70.776381] [ 70.776592] Memory state around the buggy address: [ 70.777163] ffff8880158a1480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 70.778008] ffff8880158a1500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 70.778853] >ffff8880158a1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.779693] ^ [ 70.780350] ffff8880158a1600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 70.781190] ffff8880158a1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.782031] ================================================================== [ 70.783212] Disabling lock debugging due to kernel taint [ 72.516109] BUG: Bad rss-counter state mm:00000000ba70bd5f type:MM_FILEPAGES val:33 [ 72.517645] BUG: Bad rss-counter state mm:00000000ba70bd5f type:MM_ANONPAGES val:22 [ 73.005716] BUG: Bad rss-counter state mm:00000000275e65af type:MM_FILEPAGES val:33 [ 73.007245] BUG: Bad rss-counter state mm:00000000275e65af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35462' (ECDSA) to the list of known hosts. 2023/06/20 06:29:46 fuzzer started 2023/06/20 06:29:46 dialing manager at localhost:44161 2023/06/20 06:29:46 checking machine... 2023/06/20 06:29:46 checking revisions... [ 73.773912] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:29:46 testing simple program... [ 73.825756] cgroup: Unknown subsys name 'net' [ 73.862848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:29:44 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800f3e8000 RCX=0000000000000000 RDX=1ffff11001e7d208 RSI=ffffffff8301b1cf RDI=000000000000000a RBP=0000000000000080 RSP=ffff88806ce09eb0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806ce09ff8 R12=dffffc0000000000 R13=ffff888008476800 R14=ffff88800f3e9040 R15=000000000000000a RIP=ffffffff8301b1f7 RFL=00000046 [---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 00007fb95af5b900 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=00007ffc8c7af000 CR3=000000000e72a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=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=00007fd196c34b90 CR3=000000000e470000 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=2035343a39323a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a39323a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000