syzkaller login: [ 44.028531] sshd (212) used greatest stack depth: 23992 bytes left [ 44.029964] BUG: Bad rss-counter state mm:00000000be03df64 type:MM_FILEPAGES val:33 [ 44.031064] BUG: Bad rss-counter state mm:00000000be03df64 type:MM_ANONPAGES val:22 [ 44.230996] ================================================================== [ 44.231860] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.232757] Read of size 8 at addr ffff88800e3e65c8 by task sshd/221 [ 44.233496] [ 44.233707] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.234692] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.235602] Call Trace: [ 44.235904] [ 44.236175] dump_stack_lvl+0x91/0xf0 [ 44.236643] print_report+0xcc/0x620 [ 44.237108] ? __virt_addr_valid+0x102/0x340 [ 44.237657] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.238245] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.238825] kasan_report+0xbe/0xf0 [ 44.239282] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.239868] vma_interval_tree_remove+0xc75/0xec0 [ 44.240440] vma_prepare+0xc54/0x11a0 [ 44.240893] __split_vma+0x5af/0x950 [ 44.241339] ? __pfx___split_vma+0x10/0x10 [ 44.241868] ? find_held_lock+0x2c/0x110 [ 44.242378] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.242937] ? lock_is_held_type+0x9f/0x120 [ 44.243475] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.244078] ? mtree_range_walk+0x632/0x900 [ 44.244625] ? mas_walk+0x5c7/0x7c0 [ 44.245093] do_vmi_munmap+0x1f1/0x2b0 [ 44.245609] mmap_region+0x1f9/0x2660 [ 44.246090] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.246611] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.247310] ? __pfx_lock_acquire+0x10/0x10 [ 44.247843] ? __pfx_mmap_region+0x10/0x10 [ 44.248377] ? security_mmap_addr+0x7d/0xa0 [ 44.248919] ? get_unmapped_area+0x1f5/0x3f0 [ 44.249464] do_mmap+0x854/0xf00 [ 44.249910] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.250398] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.250971] ksys_mmap_pgoff+0x3af/0x500 [ 44.251478] do_syscall_64+0x3f/0x90 [ 44.251949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.252585] RIP: 0033:0x7f4f0b4c3d82 [ 44.253060] 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 [ 44.255208] RSP: 002b:00007ffc244337a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.256120] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f0b4c3d82 [ 44.256976] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f0a8fd000 [ 44.257805] RBP: 00007f4f0a8fd000 R08: 0000000000000009 R09: 0000000000001000 [ 44.258644] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598d94e4ec0 [ 44.259492] R13: 00007ffc244337c0 R14: 00007ffc244337f0 R15: 00007ffc24433b50 [ 44.260361] [ 44.260654] [ 44.260870] Allocated by task 212: [ 44.261310] kasan_save_stack+0x22/0x50 [ 44.261892] kasan_set_track+0x25/0x30 [ 44.262402] __kasan_slab_alloc+0x59/0x70 [ 44.262956] kmem_cache_alloc+0x16b/0x370 [ 44.263497] vm_area_dup+0x20/0x160 [ 44.263963] __split_vma+0x170/0x950 [ 44.264440] split_vma+0xc6/0x110 [ 44.264910] mprotect_fixup+0x8d2/0xb30 [ 44.265420] do_mprotect_pkey+0x87e/0xd40 [ 44.265954] __x64_sys_mprotect+0x78/0xc0 [ 44.266472] do_syscall_64+0x3f/0x90 [ 44.266974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.267653] [ 44.267863] Freed by task 212: [ 44.268236] kasan_save_stack+0x22/0x50 [ 44.268734] kasan_set_track+0x25/0x30 [ 44.269209] kasan_save_free_info+0x2b/0x50 [ 44.269747] __kasan_slab_free+0x10a/0x190 [ 44.270322] kmem_cache_free+0x10d/0x4d0 [ 44.271016] rcu_core+0x8c8/0x2860 [ 44.271594] __do_softirq+0x1b7/0x7d4 [ 44.272226] [ 44.272518] Last potentially related work creation: [ 44.273306] kasan_save_stack+0x22/0x50 [ 44.274011] __kasan_record_aux_stack+0x8e/0xa0 [ 44.274765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.275675] remove_vma+0x139/0x170 [ 44.276282] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.277047] do_vmi_munmap+0x1f1/0x2b0 [ 44.277706] __vm_munmap+0x138/0x3a0 [ 44.278346] __x64_sys_munmap+0x59/0x80 [ 44.279012] do_syscall_64+0x3f/0x90 [ 44.279649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.280501] [ 44.280794] Second to last potentially related work creation: [ 44.281743] kasan_save_stack+0x22/0x50 [ 44.282417] __kasan_record_aux_stack+0x8e/0xa0 [ 44.283192] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.284054] remove_vma+0x139/0x170 [ 44.284673] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.285419] do_vmi_munmap+0x1f1/0x2b0 [ 44.286115] mmap_region+0x1f9/0x2660 [ 44.286788] do_mmap+0x854/0xf00 [ 44.287398] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.288090] ksys_mmap_pgoff+0x3af/0x500 [ 44.288797] do_syscall_64+0x3f/0x90 [ 44.289463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.290393] [ 44.290696] The buggy address belongs to the object at ffff88800e3e6570 [ 44.290696] which belongs to the cache vm_area_struct of size 168 [ 44.292689] The buggy address is located 88 bytes inside of [ 44.292689] freed 168-byte region [ffff88800e3e6570, ffff88800e3e6618) [ 44.294590] [ 44.294893] The buggy address belongs to the physical page: [ 44.295780] page:00000000df95ca24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3e6 [ 44.297272] memcg:ffff88800e4f8c01 [ 44.297853] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.298755] page_type: 0xffffffff() [ 44.299336] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 44.300532] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4f8c01 [ 44.301722] page dumped because: kasan: bad access detected [ 44.302407] [ 44.302625] Memory state around the buggy address: [ 44.303223] ffff88800e3e6480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.304122] ffff88800e3e6500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 44.305013] >ffff88800e3e6580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.305897] ^ [ 44.306572] ffff88800e3e6600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 44.307461] ffff88800e3e6680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.308349] ================================================================== [ 44.309313] Disabling lock debugging due to kernel taint [ 46.404543] BUG: Bad rss-counter state mm:00000000f3fe4b34 type:MM_FILEPAGES val:33 [ 46.405791] BUG: Bad rss-counter state mm:00000000f3fe4b34 type:MM_ANONPAGES val:22 [ 46.909720] BUG: Bad rss-counter state mm:000000003c3705e4 type:MM_FILEPAGES val:33 [ 46.911005] BUG: Bad rss-counter state mm:000000003c3705e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33092' (ECDSA) to the list of known hosts. 2023/06/19 20:18:46 fuzzer started 2023/06/19 20:18:46 dialing manager at localhost:44161 2023/06/19 20:18:46 checking machine... 2023/06/19 20:18:46 checking revisions... [ 47.645311] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:18:46 testing simple program... [ 47.681641] cgroup: Unknown subsys name 'net' [ 47.729388] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:18:40 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=ffff888008c58000 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=00007f01c1a27048 CR3=000000000d634000 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=92da008e4da73c92a940b9e8dfb7297d XMM02=000000000011de80eff9b2d0a8fce9cb XMM03=000000000011df502c67c8bc2e329bc3 XMM04=a53fc504b85b468700000000000ae988 XMM05=dfcdbad4f1609c370000000000135690 XMM06=e0c271f55275f4520000000000134868 XMM07=e042d86d42eb936e0000000000124b88 XMM08=f58350cc7fb2d7ef000000000011df50 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001fcefc2 RCX=0000000000000000 RDX=ffff88801a8051c0 RSI=ffffffff836358a7 RDI=0000000000000009 RBP=0000000000000009 RSP=ffff88800fe77dc8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800fe77e40 R13=ffff88800fe77e50 R14=00007ffe9fa71290 R15=0000000000000000 RIP=ffffffff818ea935 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 00007f2acba68900 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=00007ffe9fa6e000 CR3=000000000e9e4000 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=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