syzkaller login: [ 30.698410] BUG: Bad rss-counter state mm:000000003e7ab125 type:MM_FILEPAGES val:33 [ 30.699809] BUG: Bad rss-counter state mm:000000003e7ab125 type:MM_ANONPAGES val:22 [ 30.852247] ================================================================== [ 30.853233] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.854226] Read of size 8 at addr ffff888016a70058 by task sshd/220 [ 30.855174] [ 30.855405] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.856340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.857391] Call Trace: [ 30.857731] [ 30.858033] dump_stack_lvl+0x91/0xf0 [ 30.858554] print_report+0xcc/0x620 [ 30.859068] ? __virt_addr_valid+0x102/0x340 [ 30.859656] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.860319] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.860980] kasan_report+0xbe/0xf0 [ 30.861487] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862155] vma_interval_tree_remove+0xc75/0xec0 [ 30.862799] vma_prepare+0xc54/0x11a0 [ 30.863308] __split_vma+0x5af/0x950 [ 30.863809] ? __pfx___split_vma+0x10/0x10 [ 30.864384] ? find_held_lock+0x2c/0x110 [ 30.864940] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.865539] ? lock_is_held_type+0x9f/0x120 [ 30.866117] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.866764] ? mtree_range_walk+0x632/0x900 [ 30.867352] ? mas_walk+0x5c7/0x7c0 [ 30.867879] do_vmi_munmap+0x1f1/0x2b0 [ 30.868411] mmap_region+0x1f9/0x2660 [ 30.868922] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.869465] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.870228] ? __pfx_lock_acquire+0x10/0x10 [ 30.870794] ? __pfx_mmap_region+0x10/0x10 [ 30.871362] ? security_mmap_addr+0x7d/0xa0 [ 30.871932] ? get_unmapped_area+0x1f5/0x3f0 [ 30.872522] do_mmap+0x854/0xf00 [ 30.872995] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.873531] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.874134] ksys_mmap_pgoff+0x3af/0x500 [ 30.874674] do_syscall_64+0x3f/0x90 [ 30.875188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.875878] RIP: 0033:0x7f776f21fd82 [ 30.876366] 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 [ 30.878632] RSP: 002b:00007fff62b3a4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.879599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f776f21fd82 [ 30.880527] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f776e659000 [ 30.881427] RBP: 00007f776e659000 R08: 0000000000000009 R09: 0000000000001000 [ 30.882330] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cce8bdd980 [ 30.883224] R13: 00007fff62b3a4d0 R14: 00007fff62b3a500 R15: 00007fff62b3a860 [ 30.884145] [ 30.884459] [ 30.884685] Allocated by task 213: [ 30.885139] kasan_save_stack+0x22/0x50 [ 30.885678] kasan_set_track+0x25/0x30 [ 30.886203] __kasan_slab_alloc+0x59/0x70 [ 30.886758] kmem_cache_alloc+0x16b/0x370 [ 30.887310] vm_area_dup+0x20/0x160 [ 30.887794] __split_vma+0x170/0x950 [ 30.888305] split_vma+0xc6/0x110 [ 30.888768] mprotect_fixup+0x8d2/0xb30 [ 30.889303] do_mprotect_pkey+0x87e/0xd40 [ 30.889860] __x64_sys_mprotect+0x78/0xc0 [ 30.890413] do_syscall_64+0x3f/0x90 [ 30.890921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.891603] [ 30.891834] Freed by task 213: [ 30.892280] kasan_save_stack+0x22/0x50 [ 30.892814] kasan_set_track+0x25/0x30 [ 30.893335] kasan_save_free_info+0x2b/0x50 [ 30.893905] __kasan_slab_free+0x10a/0x190 [ 30.894475] kmem_cache_free+0x10d/0x4d0 [ 30.895015] rcu_core+0x8c8/0x2860 [ 30.895561] __do_softirq+0x1b7/0x7d4 [ 30.896081] [ 30.896309] Last potentially related work creation: [ 30.896933] kasan_save_stack+0x22/0x50 [ 30.897471] __kasan_record_aux_stack+0x8e/0xa0 [ 30.898080] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.898762] remove_vma+0x139/0x170 [ 30.899245] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.899838] do_vmi_munmap+0x1f1/0x2b0 [ 30.900380] __vm_munmap+0x138/0x3a0 [ 30.900879] __x64_sys_munmap+0x59/0x80 [ 30.901409] do_syscall_64+0x3f/0x90 [ 30.901912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.902599] [ 30.902831] The buggy address belongs to the object at ffff888016a70000 [ 30.902831] which belongs to the cache vm_area_struct of size 168 [ 30.904409] The buggy address is located 88 bytes inside of [ 30.904409] freed 168-byte region [ffff888016a70000, ffff888016a700a8) [ 30.905903] [ 30.906133] The buggy address belongs to the physical page: [ 30.906842] page:000000007cd4e4fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a70 [ 30.908021] memcg:ffff888016ad4601 [ 30.908493] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.909208] page_type: 0xffffffff() [ 30.909709] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.910729] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ad4601 [ 30.911732] page dumped because: kasan: bad access detected [ 30.912480] [ 30.912717] Memory state around the buggy address: [ 30.913363] ffff888016a6ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.914314] ffff888016a6ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.915265] >ffff888016a70000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.916210] ^ [ 30.917011] ffff888016a70080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.917950] ffff888016a70100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.918883] ================================================================== [ 30.919931] Disabling lock debugging due to kernel taint [ 33.042694] BUG: Bad rss-counter state mm:00000000d5d10d88 type:MM_FILEPAGES val:33 [ 33.043300] BUG: Bad rss-counter state mm:00000000d5d10d88 type:MM_ANONPAGES val:22 [ 33.488638] BUG: Bad rss-counter state mm:000000000ea5a697 type:MM_FILEPAGES val:33 [ 33.489889] BUG: Bad rss-counter state mm:000000000ea5a697 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64953' (ECDSA) to the list of known hosts. 2023/06/21 06:16:49 fuzzer started 2023/06/21 06:16:49 dialing manager at localhost:36067 2023/06/21 06:16:49 checking machine... 2023/06/21 06:16:49 checking revisions... [ 34.044568] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:16:50 testing simple program... [ 34.086214] cgroup: Unknown subsys name 'net' [ 34.138050] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:16:49 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=0000000000000001 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=00007fffdf6496b8 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=00007fb735aeb5100000555a3ecb7790 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=0000000000000000 RBX=000055ee3ad27ea0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000008000 RDI=000055ee3ad03350 RBP=0000000000000000 RSP=00007ffd36a33948 R8 =0000000000008000 R9 =0000000000000000 R10=000055ee3ad19770 R11=0000000000000000 R12=000000000000000b R13=000055ee3ad03350 R14=0000000000000000 R15=0000000000000001 RIP=00007f4dedd376e2 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 00007f4dedd9d900 00000000 00000000 GS =0000 0000000000000000 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=00007f4dee3550b0 CR3=000000000ce20000 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