syzkaller login: [ 30.651920] BUG: Bad rss-counter state mm:000000005904a238 type:MM_FILEPAGES val:33 [ 30.652922] BUG: Bad rss-counter state mm:000000005904a238 type:MM_ANONPAGES val:22 [ 30.687089] ================================================================== [ 30.688067] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.688991] Read of size 8 at addr ffff88800c76f6b0 by task sshd/221 [ 30.689885] [ 30.690108] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.690956] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.691914] Call Trace: [ 30.692232] [ 30.692512] dump_stack_lvl+0x91/0xf0 [ 30.692993] print_report+0xcc/0x620 [ 30.693490] ? __virt_addr_valid+0x102/0x340 [ 30.694037] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.694646] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.695251] kasan_report+0xbe/0xf0 [ 30.695722] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.696362] vma_interval_tree_remove+0xc75/0xec0 [ 30.696986] vma_prepare+0xc54/0x11a0 [ 30.697507] __split_vma+0x5af/0x950 [ 30.697993] ? __pfx___split_vma+0x10/0x10 [ 30.698547] ? find_held_lock+0x2c/0x110 [ 30.699081] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.699669] ? lock_is_held_type+0x9f/0x120 [ 30.700227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.700857] ? mtree_range_walk+0x632/0x900 [ 30.701435] ? mas_walk+0x5c7/0x7c0 [ 30.701926] do_vmi_munmap+0x1f1/0x2b0 [ 30.702445] mmap_region+0x1f9/0x2660 [ 30.702940] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.703475] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.704210] ? __pfx_lock_acquire+0x10/0x10 [ 30.704767] ? __pfx_mmap_region+0x10/0x10 [ 30.705333] ? security_mmap_addr+0x7d/0xa0 [ 30.705883] ? get_unmapped_area+0x1f5/0x3f0 [ 30.706458] do_mmap+0x854/0xf00 [ 30.706911] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.707434] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.708027] ksys_mmap_pgoff+0x3af/0x500 [ 30.708558] do_syscall_64+0x3f/0x90 [ 30.709057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.709749] RIP: 0033:0x7f68ea7d8d82 [ 30.710228] 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 [ 30.712459] RSP: 002b:00007ffeee366558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.713412] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68ea7d8d82 [ 30.714281] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68e9c12000 [ 30.715167] RBP: 00007f68e9c12000 R08: 0000000000000009 R09: 0000000000001000 [ 30.716048] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616ff685b20 [ 30.716927] R13: 00007ffeee366570 R14: 00007ffeee3665a0 R15: 00007ffeee366900 [ 30.717826] [ 30.718126] [ 30.718346] Allocated by task 214: [ 30.718785] kasan_save_stack+0x22/0x50 [ 30.719313] kasan_set_track+0x25/0x30 [ 30.719823] __kasan_slab_alloc+0x59/0x70 [ 30.720358] kmem_cache_alloc+0x16b/0x370 [ 30.720897] vm_area_dup+0x20/0x160 [ 30.721386] __split_vma+0x170/0x950 [ 30.721872] split_vma+0xc6/0x110 [ 30.722333] mprotect_fixup+0x8d2/0xb30 [ 30.722850] do_mprotect_pkey+0x87e/0xd40 [ 30.723388] __x64_sys_mprotect+0x78/0xc0 [ 30.723931] do_syscall_64+0x3f/0x90 [ 30.724418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.725079] [ 30.725313] Freed by task 214: [ 30.725717] kasan_save_stack+0x22/0x50 [ 30.726238] kasan_set_track+0x25/0x30 [ 30.726750] kasan_save_free_info+0x2b/0x50 [ 30.727298] __kasan_slab_free+0x10a/0x190 [ 30.727856] kmem_cache_free+0x10d/0x4d0 [ 30.728395] rcu_core+0x8c8/0x2860 [ 30.728856] __do_softirq+0x1b7/0x7d4 [ 30.729348] [ 30.729568] Last potentially related work creation: [ 30.730177] kasan_save_stack+0x22/0x50 [ 30.730691] __kasan_record_aux_stack+0x8e/0xa0 [ 30.731285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.731951] remove_vma+0x139/0x170 [ 30.732420] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.732998] do_vmi_munmap+0x1f1/0x2b0 [ 30.733518] __vm_munmap+0x138/0x3a0 [ 30.734008] __x64_sys_munmap+0x59/0x80 [ 30.734518] do_syscall_64+0x3f/0x90 [ 30.735010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.735672] [ 30.735894] The buggy address belongs to the object at ffff88800c76f658 [ 30.735894] which belongs to the cache vm_area_struct of size 168 [ 30.737436] The buggy address is located 88 bytes inside of [ 30.737436] freed 168-byte region [ffff88800c76f658, ffff88800c76f700) [ 30.738899] [ 30.739120] The buggy address belongs to the physical page: [ 30.739807] page:00000000d8b44a63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc76f [ 30.740942] memcg:ffff88800c97fd01 [ 30.741392] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.742057] page_type: 0xffffffff() [ 30.742525] raw: 0100000000000200 ffff88800879fc80 ffffea000063eac0 dead000000000004 [ 30.743506] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c97fd01 [ 30.744440] page dumped because: kasan: bad access detected [ 30.745127] [ 30.745367] Memory state around the buggy address: [ 30.745967] ffff88800c76f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.746873] ffff88800c76f600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.747752] >ffff88800c76f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.748649] ^ [ 30.749273] ffff88800c76f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.750173] ffff88800c76f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.751071] ================================================================== [ 30.752148] Disabling lock debugging due to kernel taint [ 33.061886] BUG: Bad rss-counter state mm:0000000019940225 type:MM_FILEPAGES val:33 [ 33.063494] BUG: Bad rss-counter state mm:0000000019940225 type:MM_ANONPAGES val:22 [ 33.625437] BUG: Bad rss-counter state mm:000000009c354552 type:MM_FILEPAGES val:32 [ 33.626420] BUG: Bad rss-counter state mm:000000009c354552 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45779' (ECDSA) to the list of known hosts. 2023/06/19 13:16:47 fuzzer started 2023/06/19 13:16:47 dialing manager at localhost:44161 2023/06/19 13:16:47 checking machine... 2023/06/19 13:16:47 checking revisions... [ 34.218583] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:16:47 testing simple program... [ 34.271648] cgroup: Unknown subsys name 'net' [ 34.310856] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:16:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffffffff0929f5f RSI=ffffffff81935d3a RDI=ffffffff8494faf8 RBP=ffff8880166eefa8 RSP=ffff88800d8779b8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff8880166ef080 R13=ffffffff8494fae0 R14=0000000000000001 R15=ffff8880166eefa8 RIP=ffffffff81935d76 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 00007f5c1eaa8900 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=00007f5c1dead890 CR3=000000000d77c000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3b34318534eba75100000000000ae988 XMM05=2847ce48ff0e1d8e0000000000134ff8 XMM06=db20f175d54767f00000000000134098 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014117e01 RSI=ffff888014117e50 RDI=ffff888014117e50 RBP=ffff888014117840 RSP=ffff888014117778 R8 =0000000000000001 R9 =ffff888014117828 R10=0000000000038001 R11=000000000008a8f2 R12=ffff888014117848 R13=ffff888014117830 R14=ffff888014117e50 R15=ffff8880141177e8 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f0ebdc23900 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=00007f0ebe1da618 CR3=00000000160ac000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000