syzkaller login: [ 30.777968] BUG: Bad rss-counter state mm:00000000790c2786 type:MM_FILEPAGES val:33 [ 30.779224] BUG: Bad rss-counter state mm:00000000790c2786 type:MM_ANONPAGES val:22 [ 30.818837] ================================================================== [ 30.819820] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.820850] Read of size 8 at addr ffff88800e6e2ed8 by task sshd/221 [ 30.821616] [ 30.821833] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.822688] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.823686] Call Trace: [ 30.824003] [ 30.824288] dump_stack_lvl+0x91/0xf0 [ 30.824781] print_report+0xcc/0x620 [ 30.825252] ? __virt_addr_valid+0x102/0x340 [ 30.825799] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.826406] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.827012] kasan_report+0xbe/0xf0 [ 30.827489] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.828105] vma_interval_tree_remove+0xc75/0xec0 [ 30.828719] vma_prepare+0xc54/0x11a0 [ 30.829208] __split_vma+0x5af/0x950 [ 30.829668] ? __pfx___split_vma+0x10/0x10 [ 30.830186] ? find_held_lock+0x2c/0x110 [ 30.830709] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.831268] ? lock_is_held_type+0x9f/0x120 [ 30.831807] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.832412] ? mtree_range_walk+0x632/0x900 [ 30.832995] ? mas_walk+0x5c7/0x7c0 [ 30.833465] do_vmi_munmap+0x1f1/0x2b0 [ 30.833954] mmap_region+0x1f9/0x2660 [ 30.834435] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.834949] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.835665] ? __pfx_lock_acquire+0x10/0x10 [ 30.836205] ? __pfx_mmap_region+0x10/0x10 [ 30.836748] ? security_mmap_addr+0x7d/0xa0 [ 30.837279] ? get_unmapped_area+0x1f5/0x3f0 [ 30.837825] do_mmap+0x854/0xf00 [ 30.838263] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.838755] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.839310] ksys_mmap_pgoff+0x3af/0x500 [ 30.839822] do_syscall_64+0x3f/0x90 [ 30.840298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.840958] RIP: 0033:0x7f2e7ed2ad82 [ 30.841414] 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 [ 30.843539] RSP: 002b:00007ffc6a5921a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.844433] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e7ed2ad82 [ 30.845290] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e7e164000 [ 30.846135] RBP: 00007f2e7e164000 R08: 0000000000000009 R09: 0000000000001000 [ 30.846978] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1b11fbb20 [ 30.847823] R13: 00007ffc6a5921c0 R14: 00007ffc6a5921f0 R15: 00007ffc6a592550 [ 30.848683] [ 30.848987] [ 30.849201] Allocated by task 214: [ 30.849635] kasan_save_stack+0x22/0x50 [ 30.850139] kasan_set_track+0x25/0x30 [ 30.850622] __kasan_slab_alloc+0x59/0x70 [ 30.851143] kmem_cache_alloc+0x16b/0x370 [ 30.851664] vm_area_dup+0x20/0x160 [ 30.852114] __split_vma+0x170/0x950 [ 30.852587] split_vma+0xc6/0x110 [ 30.853039] mprotect_fixup+0x8d2/0xb30 [ 30.853532] do_mprotect_pkey+0x87e/0xd40 [ 30.854050] __x64_sys_mprotect+0x78/0xc0 [ 30.854558] do_syscall_64+0x3f/0x90 [ 30.855019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.855661] [ 30.855870] Freed by task 214: [ 30.856250] kasan_save_stack+0x22/0x50 [ 30.856764] kasan_set_track+0x25/0x30 [ 30.857271] kasan_save_free_info+0x2b/0x50 [ 30.857831] __kasan_slab_free+0x10a/0x190 [ 30.858364] kmem_cache_free+0x10d/0x4d0 [ 30.858874] rcu_core+0x8c8/0x2860 [ 30.859324] __do_softirq+0x1b7/0x7d4 [ 30.859820] [ 30.860036] Last potentially related work creation: [ 30.860637] kasan_save_stack+0x22/0x50 [ 30.861171] __kasan_record_aux_stack+0x8e/0xa0 [ 30.861749] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.862406] remove_vma+0x139/0x170 [ 30.862869] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.863447] do_vmi_munmap+0x1f1/0x2b0 [ 30.863935] __vm_munmap+0x138/0x3a0 [ 30.864406] __x64_sys_munmap+0x59/0x80 [ 30.864924] do_syscall_64+0x3f/0x90 [ 30.865404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866063] [ 30.866277] Second to last potentially related work creation: [ 30.866958] kasan_save_stack+0x22/0x50 [ 30.867477] __kasan_record_aux_stack+0x8e/0xa0 [ 30.868051] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.868691] remove_vma+0x139/0x170 [ 30.869164] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.869720] do_vmi_munmap+0x1f1/0x2b0 [ 30.870203] __vm_munmap+0x138/0x3a0 [ 30.870682] __x64_sys_munmap+0x59/0x80 [ 30.871174] do_syscall_64+0x3f/0x90 [ 30.871645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.872288] [ 30.872502] The buggy address belongs to the object at ffff88800e6e2e80 [ 30.872502] which belongs to the cache vm_area_struct of size 168 [ 30.873975] The buggy address is located 88 bytes inside of [ 30.873975] freed 168-byte region [ffff88800e6e2e80, ffff88800e6e2f28) [ 30.875374] [ 30.875593] The buggy address belongs to the physical page: [ 30.876259] page:0000000081563d78 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6e2 [ 30.877355] memcg:ffff88800d555f01 [ 30.877778] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.878420] page_type: 0xffffffff() [ 30.878868] raw: 0100000000000200 ffff8880087a0c80 ffffea000032f780 dead000000000002 [ 30.879776] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d555f01 [ 30.880674] page dumped because: kasan: bad access detected [ 30.881332] [ 30.881549] Memory state around the buggy address: [ 30.882124] ffff88800e6e2d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.882978] ffff88800e6e2e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.883822] >ffff88800e6e2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.884661] ^ [ 30.885382] ffff88800e6e2f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.886228] ffff88800e6e2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.887070] ================================================================== [ 30.888161] Disabling lock debugging due to kernel taint [ 32.635809] BUG: Bad rss-counter state mm:00000000c0ce9d55 type:MM_FILEPAGES val:33 [ 32.636536] BUG: Bad rss-counter state mm:00000000c0ce9d55 type:MM_ANONPAGES val:22 [ 33.084293] BUG: Bad rss-counter state mm:00000000937ad1e4 type:MM_FILEPAGES val:33 [ 33.085478] BUG: Bad rss-counter state mm:00000000937ad1e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18493' (ECDSA) to the list of known hosts. 2023/06/21 07:32:16 fuzzer started 2023/06/21 07:32:17 dialing manager at localhost:36067 2023/06/21 07:32:17 checking machine... 2023/06/21 07:32:17 checking revisions... [ 33.753004] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:32:17 testing simple program... [ 33.797018] cgroup: Unknown subsys name 'net' [ 33.861228] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:32:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe094f4d28 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f25fe279510000055f2bb7d5790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1002d02f7a RBX=1ffff11002d02f7a RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888016817bc0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ecd RFL=00000282 [--S----] 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 00007f72dfb95900 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=00007f72e014d0b0 CR3=00000000166ce000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000