syzkaller login: [ 30.478910] BUG: Bad rss-counter state mm:00000000abfbaf88 type:MM_FILEPAGES val:33 [ 30.479934] BUG: Bad rss-counter state mm:00000000abfbaf88 type:MM_ANONPAGES val:22 [ 30.638258] ================================================================== [ 30.639173] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.640100] Read of size 8 at addr ffff888018c64140 by task sshd/220 [ 30.640861] [ 30.641084] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.642113] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.643119] Call Trace: [ 30.643445] [ 30.643735] dump_stack_lvl+0x91/0xf0 [ 30.644343] print_report+0xcc/0x620 [ 30.644926] ? __virt_addr_valid+0x102/0x340 [ 30.645579] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.646332] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.647065] kasan_report+0xbe/0xf0 [ 30.647634] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.648380] vma_interval_tree_remove+0xc75/0xec0 [ 30.649109] vma_prepare+0xc54/0x11a0 [ 30.649694] __split_vma+0x5af/0x950 [ 30.650292] ? __pfx___split_vma+0x10/0x10 [ 30.650947] ? find_held_lock+0x2c/0x110 [ 30.651583] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.652284] ? lock_is_held_type+0x9f/0x120 [ 30.652945] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.653685] ? mtree_range_walk+0x632/0x900 [ 30.654381] ? mas_walk+0x5c7/0x7c0 [ 30.654923] do_vmi_munmap+0x1f1/0x2b0 [ 30.655423] mmap_region+0x1f9/0x2660 [ 30.655914] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.656432] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.657146] ? __pfx_lock_acquire+0x10/0x10 [ 30.657673] ? __pfx_mmap_region+0x10/0x10 [ 30.658202] ? security_mmap_addr+0x7d/0xa0 [ 30.658739] ? get_unmapped_area+0x1f5/0x3f0 [ 30.659287] do_mmap+0x854/0xf00 [ 30.659723] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.660215] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.660774] ksys_mmap_pgoff+0x3af/0x500 [ 30.661277] do_syscall_64+0x3f/0x90 [ 30.661758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.662411] RIP: 0033:0x7f283ce0bd82 [ 30.662874] 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 [ 30.664977] RSP: 002b:00007ffdb0fdfd18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.665865] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f283ce0bd82 [ 30.666716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f283c245000 [ 30.667546] RBP: 00007f283c245000 R08: 0000000000000009 R09: 0000000000001000 [ 30.668389] R10: 0000000000000812 R11: 0000000000000206 R12: 000055beae12af70 [ 30.669221] R13: 00007ffdb0fdfd30 R14: 00007ffdb0fdfd60 R15: 00007ffdb0fe00c0 [ 30.670062] [ 30.670360] [ 30.670573] Allocated by task 213: [ 30.670997] kasan_save_stack+0x22/0x50 [ 30.671494] kasan_set_track+0x25/0x30 [ 30.671987] __kasan_slab_alloc+0x59/0x70 [ 30.672510] kmem_cache_alloc+0x16b/0x370 [ 30.673023] vm_area_dup+0x20/0x160 [ 30.673476] __split_vma+0x170/0x950 [ 30.673949] split_vma+0xc6/0x110 [ 30.674404] mprotect_fixup+0x8d2/0xb30 [ 30.674903] do_mprotect_pkey+0x87e/0xd40 [ 30.675427] __x64_sys_mprotect+0x78/0xc0 [ 30.675953] do_syscall_64+0x3f/0x90 [ 30.676433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.677077] [ 30.677296] Freed by task 19: [ 30.677679] kasan_save_stack+0x22/0x50 [ 30.678182] kasan_set_track+0x25/0x30 [ 30.678681] kasan_save_free_info+0x2b/0x50 [ 30.679200] __kasan_slab_free+0x10a/0x190 [ 30.679722] kmem_cache_free+0x10d/0x4d0 [ 30.680220] rcu_core+0x8c8/0x2860 [ 30.680655] __do_softirq+0x1b7/0x7d4 [ 30.681126] [ 30.681336] Last potentially related work creation: [ 30.681911] kasan_save_stack+0x22/0x50 [ 30.682417] __kasan_record_aux_stack+0x8e/0xa0 [ 30.682985] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.683613] remove_vma+0x139/0x170 [ 30.684062] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.684614] do_vmi_munmap+0x1f1/0x2b0 [ 30.685094] __vm_munmap+0x138/0x3a0 [ 30.685557] __x64_sys_munmap+0x59/0x80 [ 30.686045] do_syscall_64+0x3f/0x90 [ 30.686527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.687153] [ 30.687366] The buggy address belongs to the object at ffff888018c640e8 [ 30.687366] which belongs to the cache vm_area_struct of size 168 [ 30.688795] The buggy address is located 88 bytes inside of [ 30.688795] freed 168-byte region [ffff888018c640e8, ffff888018c64190) [ 30.690178] [ 30.690391] The buggy address belongs to the physical page: [ 30.691029] page:00000000188a9c25 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c64 [ 30.692090] memcg:ffff8880097c9401 [ 30.692504] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.693136] page_type: 0xffffffff() [ 30.693575] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.694470] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097c9401 [ 30.695360] page dumped because: kasan: bad access detected [ 30.696006] [ 30.696219] Memory state around the buggy address: [ 30.696790] ffff888018c64000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.697626] ffff888018c64080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.698478] >ffff888018c64100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.699305] ^ [ 30.699924] ffff888018c64180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.700757] ffff888018c64200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.701585] ================================================================== [ 30.702707] Disabling lock debugging due to kernel taint [ 32.692730] BUG: Bad rss-counter state mm:000000002e48f764 type:MM_FILEPAGES val:33 [ 32.694286] BUG: Bad rss-counter state mm:000000002e48f764 type:MM_ANONPAGES val:22 [ 33.154586] BUG: Bad rss-counter state mm:00000000beeaf979 type:MM_FILEPAGES val:33 [ 33.155568] BUG: Bad rss-counter state mm:00000000beeaf979 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63708' (ECDSA) to the list of known hosts. 2023/06/21 03:21:49 fuzzer started 2023/06/21 03:21:49 dialing manager at localhost:36067 2023/06/21 03:21:49 checking machine... 2023/06/21 03:21:49 checking revisions... [ 33.865879] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:21:50 testing simple program... [ 33.912092] cgroup: Unknown subsys name 'net' [ 33.965797] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:21:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000d68 RDX=0000000000000003 RSI=00007f9da86ceb58 RDI=00007ffed90e60d0 RBP=0000000000000d68 RSP=00007ffed90e57b0 R8 =0000000000000000 R9 =00007ffed90e5e60 R10=00007ffed90e60d0 R11=00007ffed90e6080 R12=00007f9da81318a0 R13=00007ffed90e5d70 R14=0000000000000003 R15=00007f9da86ceb58 RIP=00007f9da7ff4bb1 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 00007f9da7b7e900 00000000 00000000 GS =0000 0000000000000000 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=00007f9da8135618 CR3=0000000015f22000 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=25252525252525252525252525252525 XMM01=000000ff0000000000000000ff000000 XMM02=00000000000000000000000000000000 XMM03=a25294eaa5d02a00322e322e302e3031 XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=20227325223d746363612073253d706f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fef05958cf0 CR3=000000000d6aa000 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=199b3d97bef93ca3b34e99ef5c4133af XMM02=000000000011af70ec2efd57dc4c00df XMM03=00000000001221403be28ded4aa715ae XMM04=79f8e9d705f1fe6a00000000000ae988 XMM05=543246d5a1b2c6430000000000132740 XMM06=4fda316b135da52b0000000000132138 XMM07=e042d86d42eb936e00000000001223c0 XMM08=3be28ded4aa715ae000000000011afd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000