syzkaller login: [ 43.302241] BUG: Bad rss-counter state mm:0000000026b004e8 type:MM_FILEPAGES val:33 [ 43.303919] BUG: Bad rss-counter state mm:0000000026b004e8 type:MM_ANONPAGES val:22 [ 43.431954] ================================================================== [ 43.432924] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.433919] Read of size 8 at addr ffff88800c5cad08 by task sshd/219 [ 43.434894] [ 43.435146] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.436069] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.437116] Call Trace: [ 43.437460] [ 43.437764] dump_stack_lvl+0x91/0xf0 [ 43.438279] print_report+0xcc/0x620 [ 43.438796] ? __virt_addr_valid+0x102/0x340 [ 43.439417] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.440057] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.440698] kasan_report+0xbe/0xf0 [ 43.441209] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.441861] vma_interval_tree_remove+0xc75/0xec0 [ 43.442498] vma_prepare+0xc54/0x11a0 [ 43.443018] __split_vma+0x5af/0x950 [ 43.443523] ? __pfx___split_vma+0x10/0x10 [ 43.444085] ? find_held_lock+0x2c/0x110 [ 43.444643] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.445253] ? lock_is_held_type+0x9f/0x120 [ 43.445823] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.446472] ? mtree_range_walk+0x632/0x900 [ 43.447050] ? mas_walk+0x5c7/0x7c0 [ 43.447556] do_vmi_munmap+0x1f1/0x2b0 [ 43.448088] mmap_region+0x1f9/0x2660 [ 43.448601] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.449134] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.449878] ? __pfx_lock_acquire+0x10/0x10 [ 43.450433] ? __pfx_mmap_region+0x10/0x10 [ 43.451012] ? security_mmap_addr+0x7d/0xa0 [ 43.451568] ? get_unmapped_area+0x1f5/0x3f0 [ 43.452144] do_mmap+0x854/0xf00 [ 43.452600] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.453119] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.453707] ksys_mmap_pgoff+0x3af/0x500 [ 43.454238] do_syscall_64+0x3f/0x90 [ 43.454738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.455426] RIP: 0033:0x7fefc0f88d82 [ 43.455903] 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 [ 43.458116] RSP: 002b:00007fff83fef008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.459078] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fefc0f88d82 [ 43.459986] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fefc03c2000 [ 43.460866] RBP: 00007fefc03c2000 R08: 0000000000000009 R09: 0000000000001000 [ 43.461739] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b711c2ec0 [ 43.462632] R13: 00007fff83fef020 R14: 00007fff83fef050 R15: 00007fff83fef3b0 [ 43.463536] [ 43.463845] [ 43.464070] Allocated by task 212: [ 43.464523] kasan_save_stack+0x22/0x50 [ 43.465053] kasan_set_track+0x25/0x30 [ 43.465569] __kasan_slab_alloc+0x59/0x70 [ 43.466118] kmem_cache_alloc+0x16b/0x370 [ 43.466661] vm_area_dup+0x20/0x160 [ 43.467151] __split_vma+0x170/0x950 [ 43.467640] split_vma+0xc6/0x110 [ 43.468096] mprotect_fixup+0x8d2/0xb30 [ 43.468621] do_mprotect_pkey+0x87e/0xd40 [ 43.469166] __x64_sys_mprotect+0x78/0xc0 [ 43.469708] do_syscall_64+0x3f/0x90 [ 43.470210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.470880] [ 43.471120] Freed by task 212: [ 43.471527] kasan_save_stack+0x22/0x50 [ 43.472066] kasan_set_track+0x25/0x30 [ 43.472581] kasan_save_free_info+0x2b/0x50 [ 43.473138] __kasan_slab_free+0x10a/0x190 [ 43.473694] kmem_cache_free+0x10d/0x4d0 [ 43.474236] rcu_core+0x8c8/0x2860 [ 43.474707] __do_softirq+0x1b7/0x7d4 [ 43.475223] [ 43.475450] Last potentially related work creation: [ 43.476114] kasan_save_stack+0x22/0x50 [ 43.476642] __kasan_record_aux_stack+0x8e/0xa0 [ 43.477242] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.477920] remove_vma+0x139/0x170 [ 43.478401] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.478987] do_vmi_munmap+0x1f1/0x2b0 [ 43.479513] __vm_munmap+0x138/0x3a0 [ 43.480019] __x64_sys_munmap+0x59/0x80 [ 43.480536] do_syscall_64+0x3f/0x90 [ 43.481044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.481711] [ 43.481940] The buggy address belongs to the object at ffff88800c5cacb0 [ 43.481940] which belongs to the cache vm_area_struct of size 168 [ 43.483484] The buggy address is located 88 bytes inside of [ 43.483484] freed 168-byte region [ffff88800c5cacb0, ffff88800c5cad58) [ 43.484963] [ 43.485187] The buggy address belongs to the physical page: [ 43.485877] page:00000000fbff491d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5ca [ 43.487014] memcg:ffff88800d78ce01 [ 43.487462] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.488156] page_type: 0xffffffff() [ 43.488637] raw: 0100000000000200 ffff88800879fc80 ffffea000037d3c0 dead000000000004 [ 43.489595] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d78ce01 [ 43.490549] page dumped because: kasan: bad access detected [ 43.491266] [ 43.491493] Memory state around the buggy address: [ 43.492099] ffff88800c5cac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 43.493010] ffff88800c5cac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 43.493905] >ffff88800c5cad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 43.494792] ^ [ 43.495266] ffff88800c5cad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 43.496156] ffff88800c5cae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 43.497030] ================================================================== [ 43.497985] Disabling lock debugging due to kernel taint [ 45.871629] BUG: Bad rss-counter state mm:00000000cf5bbd6d type:MM_FILEPAGES val:33 [ 45.872880] BUG: Bad rss-counter state mm:00000000cf5bbd6d type:MM_ANONPAGES val:22 [ 46.335892] BUG: Bad rss-counter state mm:00000000954d0746 type:MM_FILEPAGES val:33 [ 46.337148] BUG: Bad rss-counter state mm:00000000954d0746 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3030' (ECDSA) to the list of known hosts. 2023/06/19 21:01:12 fuzzer started 2023/06/19 21:01:12 dialing manager at localhost:44161 2023/06/19 21:01:12 checking machine... 2023/06/19 21:01:12 checking revisions... [ 47.073980] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:01:13 testing simple program... [ 47.122781] cgroup: Unknown subsys name 'net' [ 47.169472] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:01:07 Registers: info registers vcpu 0 RAX=00007ffe6bc03ec0 RBX=00007f7ed16de510 RCX=0000000000000000 RDX=0000000000000001 RSI=00007ffe6bc04050 RDI=00007ffe6bc04018 RBP=00007ffe6bc04150 RSP=00007ffe6bc03ec0 R8 =0000000000000000 R9 =00007ffe6bc04050 R10=000000000000002c R11=0000000200000000 R12=0000000000000003 R13=0000000000000003 R14=00000000ffffffff R15=0000000000000000 RIP=00007f7ed16f8d38 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7ed0b6d900 00000000 00000000 GS =0000 0000000000000000 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=00005555c05d1bec CR3=000000000f2ae000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000055d0b860c000 RCX=ffffffff8175cc64 RDX=ffff8880164bb680 RSI=0000000000000043 RDI=0000000000000043 RBP=0000000000000043 RSP=ffff888018fefc50 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000db44067 R13=000ffffffffff000 R14=ffff88801ab25e18 R15=000055d0b860c000 RIP=ffffffff814c03b8 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f37676cf900 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=000055d0b860c160 CR3=000000001cabe000 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=07f0624c7eb4e241ee03e5a576417db7 XMM01=30a0f3479e612405d059d4ccc83de9f5 XMM02=bb7739ed4d4e62081dbd7028177a7c6d XMM03=b19ab5a7164c724cad295b2d4902feef XMM04=bfc25c2785a19c778d2a80adc0dfd48f XMM05=72efa4f595c92d726c8c5c081c2f7e47 XMM06=dd0dcb9028fd80d89bcb5715388f2104 XMM07=33df457c8099c1bcedc1bc77366b2744 XMM08=31bdeea0c8c6c0624f8b9337361c85b9 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000