syzkaller login: [ 30.616520] BUG: Bad rss-counter state mm:000000009e5e66ec type:MM_FILEPAGES val:33 [ 30.617726] BUG: Bad rss-counter state mm:000000009e5e66ec type:MM_ANONPAGES val:22 [ 30.655592] ================================================================== [ 30.656601] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.657740] Read of size 8 at addr ffff88801743adf0 by task sshd/220 [ 30.658704] [ 30.658923] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.659886] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.661028] Call Trace: [ 30.661405] <TASK> [ 30.661739] dump_stack_lvl+0x91/0xf0 [ 30.662311] print_report+0xcc/0x620 [ 30.662878] ? __virt_addr_valid+0x102/0x340 [ 30.663552] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.664296] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.665016] kasan_report+0xbe/0xf0 [ 30.665637] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.666393] vma_interval_tree_remove+0xc75/0xec0 [ 30.666993] vma_prepare+0xc54/0x11a0 [ 30.667602] __split_vma+0x5af/0x950 [ 30.668155] ? __pfx___split_vma+0x10/0x10 [ 30.668688] ? find_held_lock+0x2c/0x110 [ 30.669227] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.669792] ? lock_is_held_type+0x9f/0x120 [ 30.670344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.670950] ? mtree_range_walk+0x632/0x900 [ 30.671508] ? mas_walk+0x5c7/0x7c0 [ 30.671989] do_vmi_munmap+0x1f1/0x2b0 [ 30.672486] mmap_region+0x1f9/0x2660 [ 30.672969] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.673500] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.674214] ? __pfx_lock_acquire+0x10/0x10 [ 30.674743] ? __pfx_mmap_region+0x10/0x10 [ 30.675276] ? security_mmap_addr+0x7d/0xa0 [ 30.675806] ? get_unmapped_area+0x1f5/0x3f0 [ 30.676365] do_mmap+0x854/0xf00 [ 30.676802] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.677307] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.677867] ksys_mmap_pgoff+0x3af/0x500 [ 30.678388] do_syscall_64+0x3f/0x90 [ 30.678869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.679522] RIP: 0033:0x7f1f84ac4d82 [ 30.679977] 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 [ 30.682112] RSP: 002b:00007ffd0f5a0b08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.683025] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f84ac4d82 [ 30.683879] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f83efe000 [ 30.684724] RBP: 00007f1f83efe000 R08: 0000000000000009 R09: 0000000000001000 [ 30.685599] R10: 0000000000000812 R11: 0000000000000206 R12: 000055567e3d1980 [ 30.686461] R13: 00007ffd0f5a0b20 R14: 00007ffd0f5a0b50 R15: 00007ffd0f5a0eb0 [ 30.687326] </TASK> [ 30.687621] [ 30.687834] Allocated by task 213: [ 30.688261] kasan_save_stack+0x22/0x50 [ 30.688763] kasan_set_track+0x25/0x30 [ 30.689266] __kasan_slab_alloc+0x59/0x70 [ 30.689789] kmem_cache_alloc+0x16b/0x370 [ 30.690301] vm_area_dup+0x20/0x160 [ 30.690752] __split_vma+0x170/0x950 [ 30.691217] split_vma+0xc6/0x110 [ 30.691660] mprotect_fixup+0x8d2/0xb30 [ 30.692161] do_mprotect_pkey+0x87e/0xd40 [ 30.692679] __x64_sys_mprotect+0x78/0xc0 [ 30.693215] do_syscall_64+0x3f/0x90 [ 30.693691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.694336] [ 30.694550] Freed by task 213: [ 30.694941] kasan_save_stack+0x22/0x50 [ 30.695453] kasan_set_track+0x25/0x30 [ 30.695943] kasan_save_free_info+0x2b/0x50 [ 30.696475] __kasan_slab_free+0x10a/0x190 [ 30.697042] kmem_cache_free+0x10d/0x4d0 [ 30.697564] rcu_core+0x8c8/0x2860 [ 30.698009] __do_softirq+0x1b7/0x7d4 [ 30.698493] [ 30.698708] Last potentially related work creation: [ 30.699295] kasan_save_stack+0x22/0x50 [ 30.699797] __kasan_record_aux_stack+0x8e/0xa0 [ 30.700385] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.701047] remove_vma+0x139/0x170 [ 30.701505] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.702062] do_vmi_munmap+0x1f1/0x2b0 [ 30.702549] __vm_munmap+0x138/0x3a0 [ 30.703014] __x64_sys_munmap+0x59/0x80 [ 30.703511] do_syscall_64+0x3f/0x90 [ 30.703992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.704642] [ 30.704857] The buggy address belongs to the object at ffff88801743ad98 [ 30.704857] which belongs to the cache vm_area_struct of size 168 [ 30.706353] The buggy address is located 88 bytes inside of [ 30.706353] freed 168-byte region [ffff88801743ad98, ffff88801743ae40) [ 30.707751] [ 30.707969] The buggy address belongs to the physical page: [ 30.708641] page:000000001045770a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1743a [ 30.709736] memcg:ffff88800c529f01 [ 30.710164] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.710809] page_type: 0xffffffff() [ 30.711267] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.712188] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c529f01 [ 30.713093] page dumped because: kasan: bad access detected [ 30.713761] [ 30.713977] Memory state around the buggy address: [ 30.714561] ffff88801743ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.715416] ffff88801743ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.716271] >ffff88801743ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.717124] ^ [ 30.718257] ffff88801743ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.719312] ffff88801743ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.720347] ================================================================== [ 30.721600] Disabling lock debugging due to kernel taint [ 32.669770] BUG: Bad rss-counter state mm:000000008bf2fb42 type:MM_FILEPAGES val:33 [ 32.670565] BUG: Bad rss-counter state mm:000000008bf2fb42 type:MM_ANONPAGES val:22 [ 33.163192] BUG: Bad rss-counter state mm:00000000d50194c9 type:MM_FILEPAGES val:33 [ 33.164441] BUG: Bad rss-counter state mm:00000000d50194c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43507' (ECDSA) to the list of known hosts. 2023/06/21 00:50:34 fuzzer started 2023/06/21 00:50:34 dialing manager at localhost:36067 2023/06/21 00:50:34 checking machine... 2023/06/21 00:50:34 checking revisions... [ 33.868091] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:50:34 testing simple program... [ 33.931481] cgroup: Unknown subsys name 'net' [ 33.984388] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:50:34 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=00007f24fb3f1650 CR3=00000000180c2000 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=2033333a30353a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a30353a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f24fb3efba0 RBX=0000000000000000 RCX=0000000000000d68 RDX=0000000000000015 RSI=00007f24fb96ba84 RDI=00007ffd43c90620 RBP=00007ffd43c90610 RSP=00007ffd43c900b8 R8 =0000000000000000 R9 =0000000000000000 R10=00005586096d1290 R11=0000000000000202 R12=00007ffd43c90620 R13=00007f24fb96ba84 R14=00007ffd43c90760 R15=0000000000000015 RIP=00007f24fb2b2b30 RFL=00000202 [-------] 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 00007f24fae3c900 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=00007f24fb3f40b0 CR3=000000000db80000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=707465675f6c697475646f6d6d61705f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000