syzkaller login: [ 30.228857] BUG: Bad rss-counter state mm:00000000bba3c09f type:MM_FILEPAGES val:33 [ 30.230119] BUG: Bad rss-counter state mm:00000000bba3c09f type:MM_ANONPAGES val:22 [ 30.399799] ================================================================== [ 30.400814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.401863] Read of size 8 at addr ffff88800e7d0df0 by task sshd/221 [ 30.402833] [ 30.403057] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.403916] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.404895] Call Trace: [ 30.405216] [ 30.405502] dump_stack_lvl+0x91/0xf0 [ 30.405996] print_report+0xcc/0x620 [ 30.406498] ? __virt_addr_valid+0x102/0x340 [ 30.407048] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.407684] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.408319] kasan_report+0xbe/0xf0 [ 30.408814] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.409450] vma_interval_tree_remove+0xc75/0xec0 [ 30.410065] vma_prepare+0xc54/0x11a0 [ 30.410611] __split_vma+0x5af/0x950 [ 30.411108] ? __pfx___split_vma+0x10/0x10 [ 30.411655] ? find_held_lock+0x2c/0x110 [ 30.412199] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.412794] ? lock_is_held_type+0x9f/0x120 [ 30.413346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.413969] ? mtree_range_walk+0x632/0x900 [ 30.414563] ? mas_walk+0x5c7/0x7c0 [ 30.415054] do_vmi_munmap+0x1f1/0x2b0 [ 30.415576] mmap_region+0x1f9/0x2660 [ 30.416091] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.416622] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.417357] ? __pfx_lock_acquire+0x10/0x10 [ 30.417916] ? __pfx_mmap_region+0x10/0x10 [ 30.418477] ? security_mmap_addr+0x7d/0xa0 [ 30.419022] ? get_unmapped_area+0x1f5/0x3f0 [ 30.419591] do_mmap+0x854/0xf00 [ 30.420047] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.420569] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.421172] ksys_mmap_pgoff+0x3af/0x500 [ 30.421719] do_syscall_64+0x3f/0x90 [ 30.422244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.422914] RIP: 0033:0x7f5d864c0d82 [ 30.423402] 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 [ 30.425668] RSP: 002b:00007ffd2ffcb9d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.426882] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d864c0d82 [ 30.428007] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d858fa000 [ 30.429139] RBP: 00007f5d858fa000 R08: 0000000000000009 R09: 0000000000001000 [ 30.430307] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dabaa67ec0 [ 30.431438] R13: 00007ffd2ffcb9f0 R14: 00007ffd2ffcba20 R15: 00007ffd2ffcbd80 [ 30.432581] [ 30.432960] [ 30.433240] Allocated by task 214: [ 30.433805] kasan_save_stack+0x22/0x50 [ 30.434444] kasan_set_track+0x25/0x30 [ 30.434962] __kasan_slab_alloc+0x59/0x70 [ 30.435509] kmem_cache_alloc+0x16b/0x370 [ 30.436063] vm_area_dup+0x20/0x160 [ 30.436541] __split_vma+0x170/0x950 [ 30.437044] split_vma+0xc6/0x110 [ 30.437511] mprotect_fixup+0x8d2/0xb30 [ 30.438052] do_mprotect_pkey+0x87e/0xd40 [ 30.438617] __x64_sys_mprotect+0x78/0xc0 [ 30.439174] do_syscall_64+0x3f/0x90 [ 30.439673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.440335] [ 30.440556] Freed by task 19: [ 30.440946] kasan_save_stack+0x22/0x50 [ 30.441470] kasan_set_track+0x25/0x30 [ 30.441974] kasan_save_free_info+0x2b/0x50 [ 30.442554] __kasan_slab_free+0x10a/0x190 [ 30.443101] kmem_cache_free+0x10d/0x4d0 [ 30.443619] rcu_core+0x8c8/0x2860 [ 30.444149] __do_softirq+0x1b7/0x7d4 [ 30.444640] [ 30.444862] Last potentially related work creation: [ 30.445447] kasan_save_stack+0x22/0x50 [ 30.445954] __kasan_record_aux_stack+0x8e/0xa0 [ 30.446548] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.447206] remove_vma+0x139/0x170 [ 30.447666] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.448236] do_vmi_munmap+0x1f1/0x2b0 [ 30.448728] __vm_munmap+0x138/0x3a0 [ 30.449215] __x64_sys_munmap+0x59/0x80 [ 30.449724] do_syscall_64+0x3f/0x90 [ 30.450222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.450878] [ 30.451103] The buggy address belongs to the object at ffff88800e7d0d98 [ 30.451103] which belongs to the cache vm_area_struct of size 168 [ 30.452570] The buggy address is located 88 bytes inside of [ 30.452570] freed 168-byte region [ffff88800e7d0d98, ffff88800e7d0e40) [ 30.453976] [ 30.454218] The buggy address belongs to the physical page: [ 30.454890] page:0000000041a07fb0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7d0 [ 30.455973] memcg:ffff88800e2c4401 [ 30.456401] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.457051] page_type: 0xffffffff() [ 30.457505] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.458436] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2c4401 [ 30.459355] page dumped because: kasan: bad access detected [ 30.460025] [ 30.460243] Memory state around the buggy address: [ 30.460831] ffff88800e7d0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.461686] ffff88800e7d0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.462575] >ffff88800e7d0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.463432] ^ [ 30.464248] ffff88800e7d0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.465207] ffff88800e7d0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.466182] ================================================================== [ 30.467255] Disabling lock debugging due to kernel taint [ 32.735587] BUG: Bad rss-counter state mm:0000000094b13438 type:MM_FILEPAGES val:33 [ 32.736763] BUG: Bad rss-counter state mm:0000000094b13438 type:MM_ANONPAGES val:22 [ 33.214584] BUG: Bad rss-counter state mm:00000000c1f9fad4 type:MM_FILEPAGES val:33 [ 33.215585] BUG: Bad rss-counter state mm:00000000c1f9fad4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62036' (ECDSA) to the list of known hosts. 2023/06/20 13:17:26 fuzzer started 2023/06/20 13:17:26 dialing manager at localhost:36067 2023/06/20 13:17:26 checking machine... 2023/06/20 13:17:26 checking revisions... [ 33.938484] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:17:26 testing simple program... [ 33.994075] cgroup: Unknown subsys name 'net' [ 34.044517] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:17:25 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=ffff888008c04000 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=00007fce18c25650 CR3=0000000015d1a000 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=2035323a37313a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a37313a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09f01 RSI=ffff88806cf09fe0 RDI=ffff88806cf09a60 RBP=ffff88806cf09aa8 RSP=ffff88806cf099c8 R8 =ffffffff864b6d22 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09ab0 R13=ffff88806cf02000 R14=ffff88806cf09fe8 R15=ffff88806cf09a50 RIP=ffffffff811304d1 RFL=00000292 [--S-A--] 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 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=00007f18f8993f60 CR3=000000000c7f8000 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=32188c25a13d1baaea47b5f5ee9723bb XMM02=ec2efd57dc4c00df000000000011c950 XMM03=1ba337781ab9b8eb000000000011ca20 XMM04=09c692c8606d59c200000000000ae988 XMM05=e4cb8bb95a7664b60000000000133218 XMM06=88f63095c54ce2fc0000000000132080 XMM07=e042d86d42eb936e0000000000123618 XMM08=1ba337781ab9b8eb000000000011ca20 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000