syzkaller login: [ 32.523906] BUG: Bad rss-counter state mm:000000005a52a3d0 type:MM_FILEPAGES val:33 [ 32.525258] BUG: Bad rss-counter state mm:000000005a52a3d0 type:MM_ANONPAGES val:22 [ 32.671026] ================================================================== [ 32.671886] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.672796] Read of size 8 at addr ffff888018d444e0 by task sshd/219 [ 32.673516] [ 32.673724] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.674680] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.675621] Call Trace: [ 32.675923] [ 32.676195] dump_stack_lvl+0x91/0xf0 [ 32.676695] print_report+0xcc/0x620 [ 32.677175] ? __virt_addr_valid+0x102/0x340 [ 32.677695] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.678284] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.678872] kasan_report+0xbe/0xf0 [ 32.679324] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.679908] vma_interval_tree_remove+0xc75/0xec0 [ 32.680475] vma_prepare+0xc54/0x11a0 [ 32.680952] __split_vma+0x5af/0x950 [ 32.681407] ? __pfx___split_vma+0x10/0x10 [ 32.681918] ? find_held_lock+0x2c/0x110 [ 32.682432] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.682988] ? lock_is_held_type+0x9f/0x120 [ 32.683512] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.684119] ? mtree_range_walk+0x632/0x900 [ 32.684710] ? mas_walk+0x5c7/0x7c0 [ 32.685183] do_vmi_munmap+0x1f1/0x2b0 [ 32.685669] mmap_region+0x1f9/0x2660 [ 32.686147] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.686658] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.687356] ? __pfx_lock_acquire+0x10/0x10 [ 32.687885] ? __pfx_mmap_region+0x10/0x10 [ 32.688418] ? security_mmap_addr+0x7d/0xa0 [ 32.688981] ? get_unmapped_area+0x1f5/0x3f0 [ 32.689525] do_mmap+0x854/0xf00 [ 32.689968] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.690456] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.691010] ksys_mmap_pgoff+0x3af/0x500 [ 32.691507] do_syscall_64+0x3f/0x90 [ 32.691973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.692651] RIP: 0033:0x7fc28ecdfd82 [ 32.693107] 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 [ 32.695182] RSP: 002b:00007fff73629c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.696077] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc28ecdfd82 [ 32.696922] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc28e119000 [ 32.697743] RBP: 00007fc28e119000 R08: 0000000000000009 R09: 0000000000001000 [ 32.698570] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2e8535b20 [ 32.699409] R13: 00007fff73629c70 R14: 00007fff73629ca0 R15: 00007fff7362a000 [ 32.700253] [ 32.700552] [ 32.700785] Allocated by task 212: [ 32.701207] kasan_save_stack+0x22/0x50 [ 32.701711] kasan_set_track+0x25/0x30 [ 32.702195] __kasan_slab_alloc+0x59/0x70 [ 32.702718] kmem_cache_alloc+0x16b/0x370 [ 32.703222] vm_area_dup+0x20/0x160 [ 32.703668] __split_vma+0x170/0x950 [ 32.704135] split_vma+0xc6/0x110 [ 32.704601] mprotect_fixup+0x8d2/0xb30 [ 32.705098] do_mprotect_pkey+0x87e/0xd40 [ 32.705614] __x64_sys_mprotect+0x78/0xc0 [ 32.706132] do_syscall_64+0x3f/0x90 [ 32.706606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.707238] [ 32.707452] Freed by task 212: [ 32.707833] kasan_save_stack+0x22/0x50 [ 32.708326] kasan_set_track+0x25/0x30 [ 32.708855] kasan_save_free_info+0x2b/0x50 [ 32.709380] __kasan_slab_free+0x10a/0x190 [ 32.709899] kmem_cache_free+0x10d/0x4d0 [ 32.710397] rcu_core+0x8c8/0x2860 [ 32.710836] __do_softirq+0x1b7/0x7d4 [ 32.711298] [ 32.711508] Last potentially related work creation: [ 32.712091] kasan_save_stack+0x22/0x50 [ 32.712619] __kasan_record_aux_stack+0x8e/0xa0 [ 32.713177] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.713811] remove_vma+0x139/0x170 [ 32.714255] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.714809] do_vmi_munmap+0x1f1/0x2b0 [ 32.715298] __vm_munmap+0x138/0x3a0 [ 32.715760] __x64_sys_munmap+0x59/0x80 [ 32.716256] do_syscall_64+0x3f/0x90 [ 32.716757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.717379] [ 32.717587] The buggy address belongs to the object at ffff888018d44488 [ 32.717587] which belongs to the cache vm_area_struct of size 168 [ 32.719003] The buggy address is located 88 bytes inside of [ 32.719003] freed 168-byte region [ffff888018d44488, ffff888018d44530) [ 32.720380] [ 32.720619] The buggy address belongs to the physical page: [ 32.721277] page:0000000075a3fc32 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d44 [ 32.722364] memcg:ffff88800e076501 [ 32.722790] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.723422] page_type: 0xffffffff() [ 32.723869] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.724802] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e076501 [ 32.725687] page dumped because: kasan: bad access detected [ 32.726333] [ 32.726544] Memory state around the buggy address: [ 32.727118] ffff888018d44380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.727959] ffff888018d44400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.728827] >ffff888018d44480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.729667] ^ [ 32.730406] ffff888018d44500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.731248] ffff888018d44580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.732076] ================================================================== [ 32.733335] Disabling lock debugging due to kernel taint [ 34.491589] BUG: Bad rss-counter state mm:00000000c6395346 type:MM_FILEPAGES val:33 [ 34.493204] BUG: Bad rss-counter state mm:00000000c6395346 type:MM_ANONPAGES val:22 [ 35.025508] BUG: Bad rss-counter state mm:000000008e9ab44f type:MM_FILEPAGES val:33 [ 35.026748] BUG: Bad rss-counter state mm:000000008e9ab44f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4051' (ECDSA) to the list of known hosts. 2023/06/20 04:03:47 fuzzer started 2023/06/20 04:03:47 dialing manager at localhost:44161 2023/06/20 04:03:47 checking machine... 2023/06/20 04:03:47 checking revisions... [ 35.667878] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:03:47 testing simple program... [ 35.709944] cgroup: Unknown subsys name 'net' [ 35.777512] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:03:45 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd32c3ff650 CR3=000000000c9d0000 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=2036343a33303a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a33303a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8449ee3e RDX=ffff88801465b680 RSI=0000000000000002 RDI=0000000000000005 RBP=ffffffff84e38f80 RSP=ffff8880146b7cb8 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000005 R14=0000000000000003 R15=00007f815f8ebfff RIP=ffffffff814c0420 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 00007f815f8e7900 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=00007f815ed21a00 CR3=000000001461a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3c60785859f6206900000000000ae988 XMM05=b95e8bc2aa55ce870000000000135370 XMM06=806171799158d9670000000000134160 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000