syzkaller login: [ 30.772176] BUG: Bad rss-counter state mm:000000002637dee7 type:MM_FILEPAGES val:33 [ 30.773164] BUG: Bad rss-counter state mm:000000002637dee7 type:MM_ANONPAGES val:22 [ 30.811398] ================================================================== [ 30.812438] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.813483] Read of size 8 at addr ffff88800dda3880 by task sshd/218 [ 30.814442] [ 30.814662] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.815618] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.816767] Call Trace: [ 30.817084] [ 30.817399] dump_stack_lvl+0x91/0xf0 [ 30.818019] print_report+0xcc/0x620 [ 30.818558] ? __virt_addr_valid+0x102/0x340 [ 30.819119] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819742] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.820363] kasan_report+0xbe/0xf0 [ 30.820880] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.821642] vma_interval_tree_remove+0xc75/0xec0 [ 30.822240] vma_prepare+0xc54/0x11a0 [ 30.822720] __split_vma+0x5af/0x950 [ 30.823313] ? __pfx___split_vma+0x10/0x10 [ 30.824025] ? find_held_lock+0x2c/0x110 [ 30.824552] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.825236] ? lock_is_held_type+0x9f/0x120 [ 30.825872] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.826582] ? mtree_range_walk+0x632/0x900 [ 30.827261] ? mas_walk+0x5c7/0x7c0 [ 30.827737] do_vmi_munmap+0x1f1/0x2b0 [ 30.828231] mmap_region+0x1f9/0x2660 [ 30.828721] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.829243] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.829958] ? __pfx_lock_acquire+0x10/0x10 [ 30.830491] ? __pfx_mmap_region+0x10/0x10 [ 30.831029] ? security_mmap_addr+0x7d/0xa0 [ 30.831563] ? get_unmapped_area+0x1f5/0x3f0 [ 30.832119] do_mmap+0x854/0xf00 [ 30.832565] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.833062] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.833632] ksys_mmap_pgoff+0x3af/0x500 [ 30.834137] do_syscall_64+0x3f/0x90 [ 30.834626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.835277] RIP: 0033:0x7f6bee471d82 [ 30.835733] 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 [ 30.837903] RSP: 002b:00007ffc2d87cfb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.838823] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6bee471d82 [ 30.839673] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6bed8ab000 [ 30.840528] RBP: 00007f6bed8ab000 R08: 0000000000000009 R09: 0000000000001000 [ 30.841390] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555fcd9a6d90 [ 30.842246] R13: 00007ffc2d87cfd0 R14: 00007ffc2d87d000 R15: 00007ffc2d87d360 [ 30.843109] [ 30.843411] [ 30.843629] Allocated by task 211: [ 30.844067] kasan_save_stack+0x22/0x50 [ 30.844571] kasan_set_track+0x25/0x30 [ 30.845068] __kasan_slab_alloc+0x59/0x70 [ 30.845613] kmem_cache_alloc+0x16b/0x370 [ 30.846146] vm_area_dup+0x20/0x160 [ 30.846613] __split_vma+0x170/0x950 [ 30.847090] split_vma+0xc6/0x110 [ 30.847540] mprotect_fixup+0x8d2/0xb30 [ 30.848062] do_mprotect_pkey+0x87e/0xd40 [ 30.848598] __x64_sys_mprotect+0x78/0xc0 [ 30.849135] do_syscall_64+0x3f/0x90 [ 30.849649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.850314] [ 30.850536] Freed by task 211: [ 30.850942] kasan_save_stack+0x22/0x50 [ 30.851461] kasan_set_track+0x25/0x30 [ 30.851971] kasan_save_free_info+0x2b/0x50 [ 30.852520] __kasan_slab_free+0x10a/0x190 [ 30.853068] kmem_cache_free+0x10d/0x4d0 [ 30.853618] rcu_core+0x8c8/0x2860 [ 30.854079] __do_softirq+0x1b7/0x7d4 [ 30.854580] [ 30.854800] Last potentially related work creation: [ 30.855458] kasan_save_stack+0x22/0x50 [ 30.855975] __kasan_record_aux_stack+0x8e/0xa0 [ 30.856572] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.857258] remove_vma+0x139/0x170 [ 30.857728] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.858306] do_vmi_munmap+0x1f1/0x2b0 [ 30.858813] __vm_munmap+0x138/0x3a0 [ 30.859297] __x64_sys_munmap+0x59/0x80 [ 30.859814] do_syscall_64+0x3f/0x90 [ 30.860303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.860972] [ 30.861200] The buggy address belongs to the object at ffff88800dda3828 [ 30.861200] which belongs to the cache vm_area_struct of size 168 [ 30.862714] The buggy address is located 88 bytes inside of [ 30.862714] freed 168-byte region [ffff88800dda3828, ffff88800dda38d0) [ 30.864157] [ 30.864377] The buggy address belongs to the physical page: [ 30.865058] page:00000000a98ffb37 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdda3 [ 30.866185] memcg:ffff88801440f401 [ 30.866623] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.867350] page_type: 0xffffffff() [ 30.867821] raw: 0100000000000200 ffff8880087a0c80 ffffea00003725c0 dead000000000003 [ 30.868773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801440f401 [ 30.869720] page dumped because: kasan: bad access detected [ 30.870404] [ 30.870624] Memory state around the buggy address: [ 30.871220] ffff88800dda3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.872100] ffff88800dda3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.872982] >ffff88800dda3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.873878] ^ [ 30.874304] ffff88800dda3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.875183] ffff88800dda3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.876061] ================================================================== [ 30.877035] Disabling lock debugging due to kernel taint [ 32.737884] BUG: Bad rss-counter state mm:00000000d808428a type:MM_FILEPAGES val:33 [ 32.739338] BUG: Bad rss-counter state mm:00000000d808428a type:MM_ANONPAGES val:22 [ 33.176679] BUG: Bad rss-counter state mm:00000000ad1921a7 type:MM_FILEPAGES val:33 [ 33.177691] BUG: Bad rss-counter state mm:00000000ad1921a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44684' (ECDSA) to the list of known hosts. 2023/06/21 06:14:01 fuzzer started 2023/06/21 06:14:01 dialing manager at localhost:36067 2023/06/21 06:14:01 checking machine... 2023/06/21 06:14:01 checking revisions... [ 33.884676] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:14:01 testing simple program... [ 33.931678] cgroup: Unknown subsys name 'net' [ 33.972074] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:14:01 Registers: info registers vcpu 0 RAX=1ffff11002c95ba0 RBX=ffff88800c467e20 RCX=0000000000000000 RDX=ffff8880146b51c0 RSI=ffffffff844a575b RDI=ffff8880164add00 RBP=dffffc0000000000 RSP=ffff88800c467d90 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800c5f861e R13=ffffed100188cfcb R14=0000000000000040 R15=ffff88800c467e59 RIP=ffffffff844a5799 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 00007f8ddc7f1900 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=00007f8ddbbff0c0 CR3=000000000c620000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b9ab0550afba400700000000000ae988 XMM05=6be2c18c8f9ef67a0000000000132640 XMM06=bdf2e299e47b49d50000000000131370 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000001000 RCX=0000000000000001 RDX=0000000000000cc0 RSI=0000000000000000 RDI=ffff8880087b83c0 RBP=ffff88800ed0fd58 RSP=ffff88800ed0fd00 R8 =ffff88800ed0fd20 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087b83c0 R13=0000000000000000 R14=0000000000000000 R15=0000000000000cc0 RIP=ffffffff81803cd2 RFL=00000286 [--S--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 00007efc99ca1900 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=00007ffdecdc7000 CR3=000000000f070000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000