syzkaller login: [ 30.504294] BUG: Bad rss-counter state mm:0000000043ad9d02 type:MM_FILEPAGES val:33 [ 30.504977] BUG: Bad rss-counter state mm:0000000043ad9d02 type:MM_ANONPAGES val:22 [ 30.531851] ================================================================== [ 30.532494] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.533130] Read of size 8 at addr ffff88800c44aed8 by task sshd/221 [ 30.533649] [ 30.533799] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.534374] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.535026] Call Trace: [ 30.535238] [ 30.535427] dump_stack_lvl+0x91/0xf0 [ 30.535753] print_report+0xcc/0x620 [ 30.536074] ? __virt_addr_valid+0x102/0x340 [ 30.536469] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.536899] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.537313] kasan_report+0xbe/0xf0 [ 30.537637] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.538046] vma_interval_tree_remove+0xc75/0xec0 [ 30.538458] vma_prepare+0xc54/0x11a0 [ 30.538779] __split_vma+0x5af/0x950 [ 30.539103] ? __pfx___split_vma+0x10/0x10 [ 30.539462] ? find_held_lock+0x2c/0x110 [ 30.539817] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.540205] ? lock_is_held_type+0x9f/0x120 [ 30.540564] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.540982] ? mtree_range_walk+0x632/0x900 [ 30.541349] ? mas_walk+0x5c7/0x7c0 [ 30.541675] do_vmi_munmap+0x1f1/0x2b0 [ 30.542011] mmap_region+0x1f9/0x2660 [ 30.542337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.542688] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.543162] ? __pfx_lock_acquire+0x10/0x10 [ 30.543525] ? __pfx_mmap_region+0x10/0x10 [ 30.543886] ? security_mmap_addr+0x7d/0xa0 [ 30.544245] ? get_unmapped_area+0x1f5/0x3f0 [ 30.544614] do_mmap+0x854/0xf00 [ 30.544924] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.545259] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.545635] ksys_mmap_pgoff+0x3af/0x500 [ 30.545977] do_syscall_64+0x3f/0x90 [ 30.546305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.546750] RIP: 0033:0x7fccb2eded82 [ 30.547058] 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 [ 30.548488] RSP: 002b:00007ffd3e0622a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.549102] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccb2eded82 [ 30.549683] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccb2318000 [ 30.550260] RBP: 00007fccb2318000 R08: 0000000000000009 R09: 0000000000001000 [ 30.550825] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2578f5ec0 [ 30.551391] R13: 00007ffd3e0622c0 R14: 00007ffd3e0622f0 R15: 00007ffd3e062650 [ 30.551977] [ 30.552177] [ 30.552330] Allocated by task 214: [ 30.552628] kasan_save_stack+0x22/0x50 [ 30.552987] kasan_set_track+0x25/0x30 [ 30.553327] __kasan_slab_alloc+0x59/0x70 [ 30.553675] kmem_cache_alloc+0x16b/0x370 [ 30.554020] vm_area_dup+0x20/0x160 [ 30.554322] __split_vma+0x170/0x950 [ 30.554651] split_vma+0xc6/0x110 [ 30.554951] mprotect_fixup+0x8d2/0xb30 [ 30.555287] do_mprotect_pkey+0x87e/0xd40 [ 30.555643] __x64_sys_mprotect+0x78/0xc0 [ 30.555990] do_syscall_64+0x3f/0x90 [ 30.556307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.556743] [ 30.556885] Freed by task 0: [ 30.557134] kasan_save_stack+0x22/0x50 [ 30.557480] kasan_set_track+0x25/0x30 [ 30.557819] kasan_save_free_info+0x2b/0x50 [ 30.558177] __kasan_slab_free+0x10a/0x190 [ 30.558539] kmem_cache_free+0x10d/0x4d0 [ 30.558882] rcu_core+0x8c8/0x2860 [ 30.559177] __do_softirq+0x1b7/0x7d4 [ 30.559499] [ 30.559644] Last potentially related work creation: [ 30.560028] kasan_save_stack+0x22/0x50 [ 30.560364] __kasan_record_aux_stack+0x8e/0xa0 [ 30.560766] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.561195] remove_vma+0x139/0x170 [ 30.561494] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.561872] do_vmi_munmap+0x1f1/0x2b0 [ 30.562199] __vm_munmap+0x138/0x3a0 [ 30.562519] __x64_sys_munmap+0x59/0x80 [ 30.562855] do_syscall_64+0x3f/0x90 [ 30.563172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.563613] [ 30.563757] The buggy address belongs to the object at ffff88800c44ae80 [ 30.563757] which belongs to the cache vm_area_struct of size 168 [ 30.564751] The buggy address is located 88 bytes inside of [ 30.564751] freed 168-byte region [ffff88800c44ae80, ffff88800c44af28) [ 30.565699] [ 30.565842] The buggy address belongs to the physical page: [ 30.566284] page:0000000047706d05 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc44a [ 30.567017] memcg:ffff8880159e3301 [ 30.567307] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.567761] page_type: 0xffffffff() [ 30.568066] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.568712] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159e3301 [ 30.569320] page dumped because: kasan: bad access detected [ 30.569775] [ 30.569921] Memory state around the buggy address: [ 30.570316] ffff88800c44ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.570881] ffff88800c44ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.571452] >ffff88800c44ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.572032] ^ [ 30.572523] ffff88800c44af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.573117] ffff88800c44af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.573692] ================================================================== [ 30.574452] Disabling lock debugging due to kernel taint [ 32.323216] BUG: Bad rss-counter state mm:0000000070e0cef3 type:MM_FILEPAGES val:33 [ 32.323871] BUG: Bad rss-counter state mm:0000000070e0cef3 type:MM_ANONPAGES val:22 [ 32.666899] BUG: Bad rss-counter state mm:00000000d5a7b0d7 type:MM_FILEPAGES val:33 [ 32.667889] BUG: Bad rss-counter state mm:00000000d5a7b0d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19745' (ECDSA) to the list of known hosts. 2023/06/21 08:44:44 fuzzer started 2023/06/21 08:44:44 dialing manager at localhost:36067 2023/06/21 08:44:44 checking machine... 2023/06/21 08:44:44 checking revisions... [ 33.272698] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:44:44 testing simple program... [ 33.316700] cgroup: Unknown subsys name 'net' [ 33.367135] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:44:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=ffffffff814c84a1 RDX=ffffffff8542a6c0 RSI=0000000000000100 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce099d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff86621198 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888019b9cb80 RIP=ffffffff814c84a1 RFL=00000246 [---Z-P-] 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 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=00007f4dea103000 CR3=000000000e362000 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=2033343a34343a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a34343a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=1ffff11002c83fac RCX=0000000000000000 RDX=1ffff110038d8725 RSI=ffffffff81718185 RDI=0000000000000007 RBP=ffff88801c6c3928 RSP=ffff88801641fd40 R8 =0000000000000007 R9 =0000000000000000 R10=000000001c6c3007 R11=0000000000000000 R12=00007f49486ae008 R13=ffffffff852c61f8 R14=ffff888014280000 R15=0000000019ecc067 RIP=ffffffff817181ac RFL=00000246 [---Z-P-] 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 00007f4948704900 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=00007f49486ae008 CR3=000000001c63e000 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=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