syzkaller login: [ 30.677513] BUG: Bad rss-counter state mm:000000006a44ec7f type:MM_FILEPAGES val:32 [ 30.679384] BUG: Bad rss-counter state mm:000000006a44ec7f type:MM_ANONPAGES val:22 [ 30.837829] ================================================================== [ 30.838759] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.839720] Read of size 8 at addr ffff888015d65228 by task sshd/220 [ 30.840511] [ 30.840731] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.841756] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.842776] Call Trace: [ 30.843097] [ 30.843400] dump_stack_lvl+0x91/0xf0 [ 30.843900] print_report+0xcc/0x620 [ 30.844390] ? __virt_addr_valid+0x102/0x340 [ 30.844978] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.845591] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.846214] kasan_report+0xbe/0xf0 [ 30.846705] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847338] vma_interval_tree_remove+0xc75/0xec0 [ 30.847937] vma_prepare+0xc54/0x11a0 [ 30.848414] __split_vma+0x5af/0x950 [ 30.848897] ? __pfx___split_vma+0x10/0x10 [ 30.849421] ? find_held_lock+0x2c/0x110 [ 30.849950] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.850518] ? lock_is_held_type+0x9f/0x120 [ 30.851051] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.851660] ? mtree_range_walk+0x632/0x900 [ 30.852208] ? mas_walk+0x5c7/0x7c0 [ 30.852695] do_vmi_munmap+0x1f1/0x2b0 [ 30.853186] mmap_region+0x1f9/0x2660 [ 30.853669] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.854182] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.854927] ? __pfx_lock_acquire+0x10/0x10 [ 30.855485] ? __pfx_mmap_region+0x10/0x10 [ 30.856018] ? security_mmap_addr+0x7d/0xa0 [ 30.856568] ? get_unmapped_area+0x1f5/0x3f0 [ 30.857124] do_mmap+0x854/0xf00 [ 30.857565] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.858062] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.858630] ksys_mmap_pgoff+0x3af/0x500 [ 30.859139] do_syscall_64+0x3f/0x90 [ 30.859624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.860276] RIP: 0033:0x7fc404897d82 [ 30.860739] 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 [ 30.862885] RSP: 002b:00007ffe8ddf65a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.863805] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc404897d82 [ 30.864677] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc403cd1000 [ 30.865535] RBP: 00007fc403cd1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.866397] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d14c362ec0 [ 30.867253] R13: 00007ffe8ddf65c0 R14: 00007ffe8ddf65f0 R15: 00007ffe8ddf6950 [ 30.868119] [ 30.868414] [ 30.868648] Allocated by task 213: [ 30.869080] kasan_save_stack+0x22/0x50 [ 30.869591] kasan_set_track+0x25/0x30 [ 30.870089] __kasan_slab_alloc+0x59/0x70 [ 30.870608] kmem_cache_alloc+0x16b/0x370 [ 30.871133] vm_area_dup+0x20/0x160 [ 30.871597] __split_vma+0x170/0x950 [ 30.872069] split_vma+0xc6/0x110 [ 30.872520] mprotect_fixup+0x8d2/0xb30 [ 30.873022] do_mprotect_pkey+0x87e/0xd40 [ 30.873553] __x64_sys_mprotect+0x78/0xc0 [ 30.874079] do_syscall_64+0x3f/0x90 [ 30.874561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.875235] [ 30.875451] Freed by task 213: [ 30.875846] kasan_save_stack+0x22/0x50 [ 30.876365] kasan_set_track+0x25/0x30 [ 30.876872] kasan_save_free_info+0x2b/0x50 [ 30.877411] __kasan_slab_free+0x10a/0x190 [ 30.877954] kmem_cache_free+0x10d/0x4d0 [ 30.878462] rcu_core+0x8c8/0x2860 [ 30.878929] __do_softirq+0x1b7/0x7d4 [ 30.879421] [ 30.879645] Last potentially related work creation: [ 30.880232] kasan_save_stack+0x22/0x50 [ 30.880770] __kasan_record_aux_stack+0x8e/0xa0 [ 30.881348] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.882067] remove_vma+0x139/0x170 [ 30.882525] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.883082] do_vmi_munmap+0x1f1/0x2b0 [ 30.883565] __vm_munmap+0x138/0x3a0 [ 30.884039] __x64_sys_munmap+0x59/0x80 [ 30.884544] do_syscall_64+0x3f/0x90 [ 30.885021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.885672] [ 30.885885] The buggy address belongs to the object at ffff888015d651d0 [ 30.885885] which belongs to the cache vm_area_struct of size 168 [ 30.887355] The buggy address is located 88 bytes inside of [ 30.887355] freed 168-byte region [ffff888015d651d0, ffff888015d65278) [ 30.888779] [ 30.888997] The buggy address belongs to the physical page: [ 30.889657] page:000000005d69b4e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d65 [ 30.890749] memcg:ffff888015ed2701 [ 30.891175] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.891823] page_type: 0xffffffff() [ 30.892274] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.893214] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ed2701 [ 30.894133] page dumped because: kasan: bad access detected [ 30.894791] [ 30.895011] Memory state around the buggy address: [ 30.895599] ffff888015d65100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.896454] ffff888015d65180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.897315] >ffff888015d65200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.898175] ^ [ 30.898738] ffff888015d65280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.899605] ffff888015d65300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.900473] ================================================================== [ 30.901425] Disabling lock debugging due to kernel taint [ 33.278687] BUG: Bad rss-counter state mm:00000000179abb28 type:MM_FILEPAGES val:33 [ 33.280429] BUG: Bad rss-counter state mm:00000000179abb28 type:MM_ANONPAGES val:22 [ 33.812803] BUG: Bad rss-counter state mm:00000000c09e301c type:MM_FILEPAGES val:33 [ 33.814096] BUG: Bad rss-counter state mm:00000000c09e301c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63675' (ECDSA) to the list of known hosts. 2023/06/21 04:45:44 fuzzer started 2023/06/21 04:45:44 dialing manager at localhost:36067 2023/06/21 04:45:44 checking machine... 2023/06/21 04:45:44 checking revisions... [ 34.433821] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:45:44 testing simple program... [ 34.473009] cgroup: Unknown subsys name 'net' [ 34.525284] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:45:44 Registers: info registers vcpu 0 RAX=ffffed10028c84c6 RBX=ffffed10028c84c7 RCX=ffffffff81733272 RDX=0000000000000001 RSI=0000000000000008 RDI=ffff888014642630 RBP=ffffed10028c84c6 RSP=ffff88800d947e30 R8 =0000000000000000 R9 =ffffed10028c84c6 R10=ffff888014642637 R11=0000000000000000 R12=ffff888014642630 R13=dffffc0000000000 R14=0000000000000001 R15=ffff888014642500 RIP=ffffffff8180f173 RFL=00000283 [--S---C] 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 00007f821e561900 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=00007f821d9f2240 CR3=000000000c6f6000 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=5aef970b95beb7ff00000000000ae988 XMM05=8a468930f44f110f0000000000133480 XMM06=19e9129bd510f2350000000000132318 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=0000000000000201 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=0000000000000000 RBP=ffffffff83149af7 RSP=ffff888016bb7ab0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff83149af7 R13=ffff888016bb7b38 R14=0000000000000000 R15=00000000000000e5 RIP=ffffffff812dc341 RFL=00000046 [---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 00007fe359b7c900 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=00007fe35a133618 CR3=000000000da98000 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=563412feff00545000000000000080fe 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