syzkaller login: [ 44.683386] BUG: Bad rss-counter state mm:0000000072f2cbce type:MM_FILEPAGES val:33 [ 44.685018] BUG: Bad rss-counter state mm:0000000072f2cbce type:MM_ANONPAGES val:22 [ 44.844834] ================================================================== [ 44.845961] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.847108] Read of size 8 at addr ffff88800c6d9d08 by task sshd/225 [ 44.848216] [ 44.848518] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.849435] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.850485] Call Trace: [ 44.850820] [ 44.851122] dump_stack_lvl+0x91/0xf0 [ 44.851641] print_report+0xcc/0x620 [ 44.852159] ? __virt_addr_valid+0x102/0x340 [ 44.852743] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.853386] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.854027] kasan_report+0xbe/0xf0 [ 44.854530] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.855185] vma_interval_tree_remove+0xc75/0xec0 [ 44.855822] vma_prepare+0xc54/0x11a0 [ 44.856329] __split_vma+0x5af/0x950 [ 44.856830] ? __pfx___split_vma+0x10/0x10 [ 44.857383] ? find_held_lock+0x2c/0x110 [ 44.857927] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.858528] ? lock_is_held_type+0x9f/0x120 [ 44.859092] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.859729] ? mtree_range_walk+0x632/0x900 [ 44.860305] ? mas_walk+0x5c7/0x7c0 [ 44.860817] do_vmi_munmap+0x1f1/0x2b0 [ 44.861335] mmap_region+0x1f9/0x2660 [ 44.861838] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.862376] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.863114] ? __pfx_lock_acquire+0x10/0x10 [ 44.863666] ? __pfx_mmap_region+0x10/0x10 [ 44.864217] ? security_mmap_addr+0x7d/0xa0 [ 44.864776] ? get_unmapped_area+0x1f5/0x3f0 [ 44.865347] do_mmap+0x854/0xf00 [ 44.865808] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.866331] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.866916] ksys_mmap_pgoff+0x3af/0x500 [ 44.867439] do_syscall_64+0x3f/0x90 [ 44.867940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.868618] RIP: 0033:0x7fba4aa22d82 [ 44.869101] 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 [ 44.871300] RSP: 002b:00007fff1c43b818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.872237] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba4aa22d82 [ 44.873133] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba49e5c000 [ 44.874004] RBP: 00007fba49e5c000 R08: 0000000000000009 R09: 0000000000001000 [ 44.874882] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d24c6cdec0 [ 44.875755] R13: 00007fff1c43b830 R14: 00007fff1c43b860 R15: 00007fff1c43bbc0 [ 44.876645] [ 44.876942] [ 44.877160] Allocated by task 218: [ 44.877596] kasan_save_stack+0x22/0x50 [ 44.878120] kasan_set_track+0x25/0x30 [ 44.878625] __kasan_slab_alloc+0x59/0x70 [ 44.879160] kmem_cache_alloc+0x16b/0x370 [ 44.879686] vm_area_dup+0x20/0x160 [ 44.880154] __split_vma+0x170/0x950 [ 44.880648] split_vma+0xc6/0x110 [ 44.881101] mprotect_fixup+0x8d2/0xb30 [ 44.881615] do_mprotect_pkey+0x87e/0xd40 [ 44.882145] __x64_sys_mprotect+0x78/0xc0 [ 44.882677] do_syscall_64+0x3f/0x90 [ 44.883162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.883825] [ 44.884044] Freed by task 218: [ 44.884448] kasan_save_stack+0x22/0x50 [ 44.884966] kasan_set_track+0x25/0x30 [ 44.885474] kasan_save_free_info+0x2b/0x50 [ 44.886022] __kasan_slab_free+0x10a/0x190 [ 44.886563] kmem_cache_free+0x10d/0x4d0 [ 44.887091] rcu_core+0x8c8/0x2860 [ 44.887575] __do_softirq+0x1b7/0x7d4 [ 44.888076] [ 44.888294] Last potentially related work creation: [ 44.888957] kasan_save_stack+0x22/0x50 [ 44.889467] __kasan_record_aux_stack+0x8e/0xa0 [ 44.890051] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.890726] remove_vma+0x139/0x170 [ 44.891197] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.891785] do_vmi_munmap+0x1f1/0x2b0 [ 44.892300] __vm_munmap+0x138/0x3a0 [ 44.892804] __x64_sys_munmap+0x59/0x80 [ 44.893307] do_syscall_64+0x3f/0x90 [ 44.893792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.894461] [ 44.894680] The buggy address belongs to the object at ffff88800c6d9cb0 [ 44.894680] which belongs to the cache vm_area_struct of size 168 [ 44.896228] The buggy address is located 88 bytes inside of [ 44.896228] freed 168-byte region [ffff88800c6d9cb0, ffff88800c6d9d58) [ 44.897772] [ 44.898001] The buggy address belongs to the physical page: [ 44.898721] page:0000000093b6790a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6d9 [ 44.899907] memcg:ffff88800efca901 [ 44.900378] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.901071] page_type: 0xffffffff() [ 44.901542] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.902524] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efca901 [ 44.903481] page dumped because: kasan: bad access detected [ 44.904191] [ 44.904423] Memory state around the buggy address: [ 44.905030] ffff88800c6d9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 44.905940] ffff88800c6d9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 44.906842] >ffff88800c6d9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 44.907748] ^ [ 44.908206] ffff88800c6d9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 44.909129] ffff88800c6d9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 44.910024] ================================================================== [ 44.911003] Disabling lock debugging due to kernel taint [ 46.161990] BUG: Bad rss-counter state mm:000000009b3e58c3 type:MM_FILEPAGES val:33 [ 46.162819] BUG: Bad rss-counter state mm:000000009b3e58c3 type:MM_ANONPAGES val:22 [ 46.463560] BUG: Bad rss-counter state mm:0000000000dd5795 type:MM_FILEPAGES val:33 [ 46.464106] BUG: Bad rss-counter state mm:0000000000dd5795 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61041' (ECDSA) to the list of known hosts. 2023/06/19 23:16:51 fuzzer started 2023/06/19 23:16:51 dialing manager at localhost:44161 2023/06/19 23:16:51 checking machine... 2023/06/19 23:16:51 checking revisions... [ 47.058335] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:16:51 testing simple program... [ 47.109836] cgroup: Unknown subsys name 'net' [ 47.157614] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:16:36 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=00007fffbacb3000 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=00007f9ae73cd5100000558c2f124790 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8613753e RDX=1ffff11001dfaf31 RSI=1ffff11001dfaf30 RDI=1ffff11001dfaf30 RBP=ffff88800efd7980 RSP=ffff88800efd78b8 R8 =ffffffff86137542 R9 =ffff88800efd7968 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800efd7988 R13=ffff88800efd7970 R14=ffff88800efd7c88 R15=ffff88800efd7928 RIP=ffffffff811310ce 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb624502900 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=00007fb624ab7650 CR3=00000000094bc000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000