Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.765299] BUG: Bad rss-counter state mm:000000005f6d982e type:MM_FILEPAGES val:33 [ 32.766498] BUG: Bad rss-counter state mm:000000005f6d982e type:MM_ANONPAGES val:22 [ 32.910739] ================================================================== [ 32.911678] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.912620] Read of size 8 at addr ffff8880167a05c8 by task sshd/225 [ 32.913509] [ 32.913738] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.914601] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.915601] Call Trace: [ 32.915927] [ 32.916219] dump_stack_lvl+0x91/0xf0 [ 32.916717] print_report+0xcc/0x620 [ 32.917209] ? __virt_addr_valid+0x102/0x340 [ 32.917769] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.918401] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.919052] kasan_report+0xbe/0xf0 [ 32.919540] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.920168] vma_interval_tree_remove+0xc75/0xec0 [ 32.920795] vma_prepare+0xc54/0x11a0 [ 32.921326] __split_vma+0x5af/0x950 [ 32.921844] ? __pfx___split_vma+0x10/0x10 [ 32.922430] ? find_held_lock+0x2c/0x110 [ 32.923016] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.923640] ? lock_is_held_type+0x9f/0x120 [ 32.924238] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.924903] ? mtree_range_walk+0x632/0x900 [ 32.925521] ? mas_walk+0x5c7/0x7c0 [ 32.926048] do_vmi_munmap+0x1f1/0x2b0 [ 32.926589] mmap_region+0x1f9/0x2660 [ 32.927133] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.927699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.928490] ? __pfx_lock_acquire+0x10/0x10 [ 32.929083] ? __pfx_mmap_region+0x10/0x10 [ 32.929671] ? security_mmap_addr+0x7d/0xa0 [ 32.930260] ? get_unmapped_area+0x1f5/0x3f0 [ 32.930883] do_mmap+0x854/0xf00 [ 32.931373] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.931921] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.932542] ksys_mmap_pgoff+0x3af/0x500 [ 32.933107] do_syscall_64+0x3f/0x90 [ 32.933637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.934352] RIP: 0033:0x7fd516b27d82 [ 32.934867] 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 [ 32.937240] RSP: 002b:00007ffee6b2ae88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.938244] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd516b27d82 [ 32.939191] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd515f61000 [ 32.940133] RBP: 00007fd515f61000 R08: 0000000000000009 R09: 0000000000001000 [ 32.941078] R10: 0000000000000812 R11: 0000000000000206 R12: 000055deef5e1f70 [ 32.942018] R13: 00007ffee6b2aea0 R14: 00007ffee6b2aed0 R15: 00007ffee6b2b230 [ 32.942991] [ 32.943314] [ 32.943553] Allocated by task 218: [ 32.944028] kasan_save_stack+0x22/0x50 [ 32.944587] kasan_set_track+0x25/0x30 [ 32.945136] __kasan_slab_alloc+0x59/0x70 [ 32.945714] kmem_cache_alloc+0x16b/0x370 [ 32.946284] vm_area_dup+0x20/0x160 [ 32.946793] __split_vma+0x170/0x950 [ 32.947313] split_vma+0xc6/0x110 [ 32.947799] mprotect_fixup+0x8d2/0xb30 [ 32.948352] do_mprotect_pkey+0x87e/0xd40 [ 32.948933] __x64_sys_mprotect+0x78/0xc0 [ 32.949515] do_syscall_64+0x3f/0x90 [ 32.950034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.950754] [ 32.950993] Freed by task 218: [ 32.951431] kasan_save_stack+0x22/0x50 [ 32.951987] kasan_set_track+0x25/0x30 [ 32.952533] kasan_save_free_info+0x2b/0x50 [ 32.953120] __kasan_slab_free+0x10a/0x190 [ 32.953708] kmem_cache_free+0x10d/0x4d0 [ 32.954269] rcu_core+0x8c8/0x2860 [ 32.954780] __do_softirq+0x1b7/0x7d4 [ 32.955310] [ 32.955545] Last potentially related work creation: [ 32.956193] kasan_save_stack+0x22/0x50 [ 32.956748] __kasan_record_aux_stack+0x8e/0xa0 [ 32.957385] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.958100] remove_vma+0x139/0x170 [ 32.958596] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.959223] do_vmi_munmap+0x1f1/0x2b0 [ 32.959768] __vm_munmap+0x138/0x3a0 [ 32.960290] __x64_sys_munmap+0x59/0x80 [ 32.960840] do_syscall_64+0x3f/0x90 [ 32.961364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.962072] [ 32.962307] The buggy address belongs to the object at ffff8880167a0570 [ 32.962307] which belongs to the cache vm_area_struct of size 168 [ 32.963952] The buggy address is located 88 bytes inside of [ 32.963952] freed 168-byte region [ffff8880167a0570, ffff8880167a0618) [ 32.965505] [ 32.965740] The buggy address belongs to the physical page: [ 32.966476] page:000000007870d442 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167a0 [ 32.967700] memcg:ffff888016b16c01 [ 32.968174] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.968891] page_type: 0xffffffff() [ 32.969390] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.970415] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b16c01 [ 32.971431] page dumped because: kasan: bad access detected [ 32.972168] [ 32.972406] Memory state around the buggy address: [ 32.973050] ffff8880167a0480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.974006] ffff8880167a0500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 32.974972] >ffff8880167a0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.975920] ^ [ 32.976660] ffff8880167a0600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.977610] ffff8880167a0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.978559] ================================================================== [ 32.979631] Disabling lock debugging due to kernel taint [ 35.044419] BUG: Bad rss-counter state mm:00000000706bfda5 type:MM_FILEPAGES val:33 [ 35.045341] BUG: Bad rss-counter state mm:00000000706bfda5 type:MM_ANONPAGES val:22 [ 35.578219] BUG: Bad rss-counter state mm:000000007e765b7b type:MM_FILEPAGES val:33 [ 35.579423] BUG: Bad rss-counter state mm:000000007e765b7b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47809' (ECDSA) to the list of known hosts. 2023/06/19 11:28:22 fuzzer started 2023/06/19 11:28:22 dialing manager at localhost:44161 2023/06/19 11:28:22 checking machine... 2023/06/19 11:28:22 checking revisions... [ 36.248745] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:28:23 testing simple program... [ 36.302950] cgroup: Unknown subsys name 'net' [ 36.352499] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:28:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffccf5a0b98 CR3=0000000005482000 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=00007f272975a510000055dd5fc40790 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 info registers vcpu 1 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88800f0578e8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=ffff88800c47f720 RIP=ffffffff8180eff3 RFL=00000283 [--S---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 00007f61ac85e900 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=00007f61ace160b0 CR3=0000000015818000 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=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