syzkaller login: [ 28.747291] BUG: Bad rss-counter state mm:00000000d008819b type:MM_FILEPAGES val:33 [ 28.748241] BUG: Bad rss-counter state mm:00000000d008819b type:MM_ANONPAGES val:22 [ 28.926779] ================================================================== [ 28.927758] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.928757] Read of size 8 at addr ffff88800f134c20 by task sshd/220 [ 28.929673] [ 28.929906] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.930833] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.931901] Call Trace: [ 28.932240] [ 28.932546] dump_stack_lvl+0x91/0xf0 [ 28.933067] print_report+0xcc/0x620 [ 28.933601] ? __virt_addr_valid+0x102/0x340 [ 28.934191] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.934845] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.935502] kasan_report+0xbe/0xf0 [ 28.936019] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.936679] vma_interval_tree_remove+0xc75/0xec0 [ 28.937357] vma_prepare+0xc54/0x11a0 [ 28.937886] __split_vma+0x5af/0x950 [ 28.938406] ? __pfx___split_vma+0x10/0x10 [ 28.938988] ? find_held_lock+0x2c/0x110 [ 28.939557] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.940178] ? lock_is_held_type+0x9f/0x120 [ 28.940770] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.941462] ? mtree_range_walk+0x632/0x900 [ 28.942078] ? mas_walk+0x5c7/0x7c0 [ 28.942603] do_vmi_munmap+0x1f1/0x2b0 [ 28.943150] mmap_region+0x1f9/0x2660 [ 28.943681] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.944250] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.945044] ? __pfx_lock_acquire+0x10/0x10 [ 28.945638] ? __pfx_mmap_region+0x10/0x10 [ 28.946223] ? security_mmap_addr+0x7d/0xa0 [ 28.946809] ? get_unmapped_area+0x1f5/0x3f0 [ 28.947415] do_mmap+0x854/0xf00 [ 28.947906] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.948450] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.949074] ksys_mmap_pgoff+0x3af/0x500 [ 28.949662] do_syscall_64+0x3f/0x90 [ 28.950195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.950913] RIP: 0033:0x7f0bbd3d1d82 [ 28.951421] 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 [ 28.953794] RSP: 002b:00007ffccc9db0d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.954803] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0bbd3d1d82 [ 28.955737] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0bbc80b000 [ 28.956675] RBP: 00007f0bbc80b000 R08: 0000000000000009 R09: 0000000000001000 [ 28.957624] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f448b1ec0 [ 28.958567] R13: 00007ffccc9db0f0 R14: 00007ffccc9db120 R15: 00007ffccc9db480 [ 28.959514] [ 28.959836] [ 28.960072] Allocated by task 213: [ 28.960547] kasan_save_stack+0x22/0x50 [ 28.961116] kasan_set_track+0x25/0x30 [ 28.961680] __kasan_slab_alloc+0x59/0x70 [ 28.962258] kmem_cache_alloc+0x16b/0x370 [ 28.962831] vm_area_dup+0x20/0x160 [ 28.963330] __split_vma+0x170/0x950 [ 28.963846] split_vma+0xc6/0x110 [ 28.964329] mprotect_fixup+0x8d2/0xb30 [ 28.964898] do_mprotect_pkey+0x87e/0xd40 [ 28.965489] __x64_sys_mprotect+0x78/0xc0 [ 28.966064] do_syscall_64+0x3f/0x90 [ 28.966588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.967306] [ 28.967542] Freed by task 213: [ 28.967974] kasan_save_stack+0x22/0x50 [ 28.968531] kasan_set_track+0x25/0x30 [ 28.969076] kasan_save_free_info+0x2b/0x50 [ 28.969684] __kasan_slab_free+0x10a/0x190 [ 28.970280] kmem_cache_free+0x10d/0x4d0 [ 28.970846] rcu_core+0x8c8/0x2860 [ 28.971335] __do_softirq+0x1b7/0x7d4 [ 28.971864] [ 28.972099] Last potentially related work creation: [ 28.972749] kasan_save_stack+0x22/0x50 [ 28.973323] __kasan_record_aux_stack+0x8e/0xa0 [ 28.973960] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.974690] remove_vma+0x139/0x170 [ 28.975197] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.975798] do_vmi_munmap+0x1f1/0x2b0 [ 28.976324] __vm_munmap+0x138/0x3a0 [ 28.976836] __x64_sys_munmap+0x59/0x80 [ 28.977385] do_syscall_64+0x3f/0x90 [ 28.977896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.978598] [ 28.978839] The buggy address belongs to the object at ffff88800f134bc8 [ 28.978839] which belongs to the cache vm_area_struct of size 168 [ 28.980472] The buggy address is located 88 bytes inside of [ 28.980472] freed 168-byte region [ffff88800f134bc8, ffff88800f134c70) [ 28.982055] [ 28.982292] The buggy address belongs to the physical page: [ 28.983033] page:00000000d1a4c8d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf134 [ 28.984239] memcg:ffff888018c83901 [ 28.984712] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.985450] page_type: 0xffffffff() [ 28.985953] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.986980] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c83901 [ 28.987996] page dumped because: kasan: bad access detected [ 28.988731] [ 28.988973] Memory state around the buggy address: [ 28.989630] ffff88800f134b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.990582] ffff88800f134b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.991538] >ffff88800f134c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.992485] ^ [ 28.993072] ffff88800f134c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.994043] ffff88800f134d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.994990] ================================================================== [ 28.996101] Disabling lock debugging due to kernel taint [ 31.345606] BUG: Bad rss-counter state mm:000000008cce6b32 type:MM_FILEPAGES val:33 [ 31.346574] BUG: Bad rss-counter state mm:000000008cce6b32 type:MM_ANONPAGES val:22 [ 31.820870] BUG: Bad rss-counter state mm:0000000010d72b39 type:MM_FILEPAGES val:33 [ 31.821874] BUG: Bad rss-counter state mm:0000000010d72b39 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21118' (ECDSA) to the list of known hosts. 2023/06/21 04:09:10 fuzzer started 2023/06/21 04:09:10 dialing manager at localhost:36067 2023/06/21 04:09:10 checking machine... 2023/06/21 04:09:10 checking revisions... [ 32.500558] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:09:10 testing simple program... [ 32.548169] cgroup: Unknown subsys name 'net' [ 32.593607] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:09:10 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f593b4c6018 CR3=000000000c6e2000 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=13a3e75d7eea698ff84a62d108ce12bc XMM02=000000000011a208eff9b2d0a8fce9cb XMM03=000000000011a2d82c67c8bc2e329bc3 XMM04=c0d78e743354cd8e00000000000ae988 XMM05=fae7a474b20b397e0000000000132310 XMM06=4fda316b135da52b00000000001313b0 XMM07=e042d86d42eb936e0000000000121918 XMM08=453410d2be7bd91a000000000011a2d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3d350 RBX=1ffff110028e0e85 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888014707408 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000054 R11=000008db000008db R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180f036 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f120e1b2900 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=00007ffc00b52000 CR3=000000000c73c000 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