syzkaller login: [ 33.536211] BUG: Bad rss-counter state mm:000000006be239ed type:MM_FILEPAGES val:33 [ 33.537339] BUG: Bad rss-counter state mm:000000006be239ed type:MM_ANONPAGES val:22 [ 33.702616] ================================================================== [ 33.703748] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.704899] Read of size 8 at addr ffff88801025b880 by task sshd/219 [ 33.705967] [ 33.706222] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.707073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.708068] Call Trace: [ 33.708387] [ 33.708671] dump_stack_lvl+0x91/0xf0 [ 33.709164] print_report+0xcc/0x620 [ 33.709653] ? __virt_addr_valid+0x102/0x340 [ 33.710206] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.710823] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.711460] kasan_report+0xbe/0xf0 [ 33.711939] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.712571] vma_interval_tree_remove+0xc75/0xec0 [ 33.713182] vma_prepare+0xc54/0x11a0 [ 33.713660] __split_vma+0x5af/0x950 [ 33.714140] ? __pfx___split_vma+0x10/0x10 [ 33.714668] ? find_held_lock+0x2c/0x110 [ 33.715192] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.715783] ? lock_is_held_type+0x9f/0x120 [ 33.716332] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.716943] ? mtree_range_walk+0x632/0x900 [ 33.717501] ? mas_walk+0x5c7/0x7c0 [ 33.717979] do_vmi_munmap+0x1f1/0x2b0 [ 33.718478] mmap_region+0x1f9/0x2660 [ 33.718957] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.719506] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.720215] ? __pfx_lock_acquire+0x10/0x10 [ 33.720745] ? __pfx_mmap_region+0x10/0x10 [ 33.721287] ? security_mmap_addr+0x7d/0xa0 [ 33.721832] ? get_unmapped_area+0x1f5/0x3f0 [ 33.722386] do_mmap+0x854/0xf00 [ 33.722829] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.723354] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.723913] ksys_mmap_pgoff+0x3af/0x500 [ 33.724426] do_syscall_64+0x3f/0x90 [ 33.724909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.725556] RIP: 0033:0x7ffb01142d82 [ 33.726042] 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 [ 33.728313] RSP: 002b:00007ffc5a76ad18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.729240] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb01142d82 [ 33.730131] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb0057c000 [ 33.731157] RBP: 00007ffb0057c000 R08: 0000000000000009 R09: 0000000000001000 [ 33.732137] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558167a18ec0 [ 33.733053] R13: 00007ffc5a76ad30 R14: 00007ffc5a76ad60 R15: 00007ffc5a76b0c0 [ 33.733919] [ 33.734214] [ 33.734429] Allocated by task 212: [ 33.734866] kasan_save_stack+0x22/0x50 [ 33.735390] kasan_set_track+0x25/0x30 [ 33.735887] __kasan_slab_alloc+0x59/0x70 [ 33.736414] kmem_cache_alloc+0x16b/0x370 [ 33.736931] vm_area_dup+0x20/0x160 [ 33.737389] __split_vma+0x170/0x950 [ 33.737858] split_vma+0xc6/0x110 [ 33.738302] mprotect_fixup+0x8d2/0xb30 [ 33.738813] do_mprotect_pkey+0x87e/0xd40 [ 33.739359] __x64_sys_mprotect+0x78/0xc0 [ 33.739886] do_syscall_64+0x3f/0x90 [ 33.740366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.741021] [ 33.741241] Freed by task 212: [ 33.741643] kasan_save_stack+0x22/0x50 [ 33.742155] kasan_set_track+0x25/0x30 [ 33.742648] kasan_save_free_info+0x2b/0x50 [ 33.743182] __kasan_slab_free+0x10a/0x190 [ 33.743738] kmem_cache_free+0x10d/0x4d0 [ 33.744260] rcu_core+0x8c8/0x2860 [ 33.744712] __do_softirq+0x1b7/0x7d4 [ 33.745196] [ 33.745410] Last potentially related work creation: [ 33.746003] kasan_save_stack+0x22/0x50 [ 33.746505] __kasan_record_aux_stack+0x8e/0xa0 [ 33.747086] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.747751] remove_vma+0x139/0x170 [ 33.748208] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.748770] do_vmi_munmap+0x1f1/0x2b0 [ 33.749272] __vm_munmap+0x138/0x3a0 [ 33.749751] __x64_sys_munmap+0x59/0x80 [ 33.750253] do_syscall_64+0x3f/0x90 [ 33.750741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.751409] [ 33.751626] The buggy address belongs to the object at ffff88801025b828 [ 33.751626] which belongs to the cache vm_area_struct of size 168 [ 33.753123] The buggy address is located 88 bytes inside of [ 33.753123] freed 168-byte region [ffff88801025b828, ffff88801025b8d0) [ 33.754548] [ 33.754770] The buggy address belongs to the physical page: [ 33.755458] page:0000000060a4b8d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1025b [ 33.756580] memcg:ffff888019f2b401 [ 33.757012] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.757669] page_type: 0xffffffff() [ 33.758124] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.759059] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f2b401 [ 33.759991] page dumped because: kasan: bad access detected [ 33.760666] [ 33.760882] Memory state around the buggy address: [ 33.761477] ffff88801025b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.762331] ffff88801025b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.763206] >ffff88801025b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.764073] ^ [ 33.764500] ffff88801025b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.765374] ffff88801025b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.766224] ================================================================== [ 33.767284] Disabling lock debugging due to kernel taint [ 36.473402] BUG: Bad rss-counter state mm:000000008e687ce8 type:MM_FILEPAGES val:33 [ 36.474453] BUG: Bad rss-counter state mm:000000008e687ce8 type:MM_ANONPAGES val:22 [ 36.938769] BUG: Bad rss-counter state mm:00000000592816d2 type:MM_FILEPAGES val:33 [ 36.939793] BUG: Bad rss-counter state mm:00000000592816d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24432' (ECDSA) to the list of known hosts. 2023/06/20 06:25:58 fuzzer started 2023/06/20 06:25:58 dialing manager at localhost:44161 2023/06/20 06:25:58 checking machine... 2023/06/20 06:25:58 checking revisions... [ 37.607177] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:25:58 testing simple program... [ 37.658892] cgroup: Unknown subsys name 'net' [ 37.722449] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:25:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d9d8000 RCX=0000000000000000 RDX=1ffff11001b3b0d2 RSI=0000000000000000 RDI=ffff88800d9d8692 RBP=ffff88800d9d8608 RSP=ffff88800f577d88 R8 =0000000000000003 R9 =0000000000000000 R10=ffff88800d9d8653 R11=00000000000b6996 R12=ffff88800d9d8608 R13=0000000000000009 R14=ffffffff87f94640 R15=0000000000000001 RIP=ffffffff83863ac0 RFL=00000216 [----AP-] 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 00007fcb5783e900 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=00007fcb57df60b0 CR3=000000001a388000 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=2037353a35323a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a35323a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f22f3f09950 CR3=00000000100ba000 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=d46ac0b5a59ffd8d3d4197c2a6da55d2 XMM02=ec2efd57dc4c00df000000000011fdc0 XMM03=ad45f9c8c3a0a8a9000000000011fe90 XMM04=9196c150907051a900000000000ae988 XMM05=dfcdbad4f1609c370000000000134078 XMM06=eceb9c085c79477c0000000000132ee0 XMM07=e042d86d42eb936e0000000000124818 XMM08=ad45f9c8c3a0a8a9000000000011fe90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000