syzkaller login: [ 30.535565] BUG: Bad rss-counter state mm:000000009aa80a08 type:MM_FILEPAGES val:33 [ 30.536920] BUG: Bad rss-counter state mm:000000009aa80a08 type:MM_ANONPAGES val:22 [ 30.700888] ================================================================== [ 30.701820] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.702778] Read of size 8 at addr ffff88800c460b38 by task sshd/220 [ 30.703656] [ 30.703884] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.704778] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.705786] Call Trace: [ 30.706109] [ 30.706409] dump_stack_lvl+0x91/0xf0 [ 30.706916] print_report+0xcc/0x620 [ 30.707408] ? __virt_addr_valid+0x102/0x340 [ 30.707961] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.708596] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.709225] kasan_report+0xbe/0xf0 [ 30.709705] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.710321] vma_interval_tree_remove+0xc75/0xec0 [ 30.710939] vma_prepare+0xc54/0x11a0 [ 30.711427] __split_vma+0x5af/0x950 [ 30.711904] ? __pfx___split_vma+0x10/0x10 [ 30.712461] ? find_held_lock+0x2c/0x110 [ 30.712986] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.713559] ? lock_is_held_type+0x9f/0x120 [ 30.714108] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.714721] ? mtree_range_walk+0x632/0x900 [ 30.715283] ? mas_walk+0x5c7/0x7c0 [ 30.715763] do_vmi_munmap+0x1f1/0x2b0 [ 30.716266] mmap_region+0x1f9/0x2660 [ 30.716779] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.717300] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.718023] ? __pfx_lock_acquire+0x10/0x10 [ 30.718558] ? __pfx_mmap_region+0x10/0x10 [ 30.719099] ? security_mmap_addr+0x7d/0xa0 [ 30.719635] ? get_unmapped_area+0x1f5/0x3f0 [ 30.720195] do_mmap+0x854/0xf00 [ 30.720646] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.721156] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.721725] ksys_mmap_pgoff+0x3af/0x500 [ 30.722242] do_syscall_64+0x3f/0x90 [ 30.722727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.723393] RIP: 0033:0x7fef1e909d82 [ 30.723855] 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 [ 30.725991] RSP: 002b:00007ffcd82def58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.726897] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef1e909d82 [ 30.727750] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef1dd43000 [ 30.728631] RBP: 00007fef1dd43000 R08: 0000000000000009 R09: 0000000000001000 [ 30.729497] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d4a613f60 [ 30.730354] R13: 00007ffcd82def70 R14: 00007ffcd82defa0 R15: 00007ffcd82df300 [ 30.731226] [ 30.731524] [ 30.731744] Allocated by task 213: [ 30.732182] kasan_save_stack+0x22/0x50 [ 30.732697] kasan_set_track+0x25/0x30 [ 30.733201] __kasan_slab_alloc+0x59/0x70 [ 30.733734] kmem_cache_alloc+0x16b/0x370 [ 30.734264] vm_area_dup+0x20/0x160 [ 30.734724] __split_vma+0x170/0x950 [ 30.735204] split_vma+0xc6/0x110 [ 30.735657] mprotect_fixup+0x8d2/0xb30 [ 30.736165] do_mprotect_pkey+0x87e/0xd40 [ 30.736703] __x64_sys_mprotect+0x78/0xc0 [ 30.737233] do_syscall_64+0x3f/0x90 [ 30.737713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.738380] [ 30.738600] Freed by task 13: [ 30.738992] kasan_save_stack+0x22/0x50 [ 30.739500] kasan_set_track+0x25/0x30 [ 30.740007] kasan_save_free_info+0x2b/0x50 [ 30.740576] __kasan_slab_free+0x10a/0x190 [ 30.741119] kmem_cache_free+0x10d/0x4d0 [ 30.741631] rcu_core+0x8c8/0x2860 [ 30.742078] __do_softirq+0x1b7/0x7d4 [ 30.742563] [ 30.742780] Last potentially related work creation: [ 30.743376] kasan_save_stack+0x22/0x50 [ 30.743893] __kasan_record_aux_stack+0x8e/0xa0 [ 30.744496] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.745151] remove_vma+0x139/0x170 [ 30.745607] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.746171] do_vmi_munmap+0x1f1/0x2b0 [ 30.746667] __vm_munmap+0x138/0x3a0 [ 30.747140] __x64_sys_munmap+0x59/0x80 [ 30.747634] do_syscall_64+0x3f/0x90 [ 30.748120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.748774] [ 30.748995] The buggy address belongs to the object at ffff88800c460ae0 [ 30.748995] which belongs to the cache vm_area_struct of size 168 [ 30.750463] The buggy address is located 88 bytes inside of [ 30.750463] freed 168-byte region [ffff88800c460ae0, ffff88800c460b88) [ 30.751877] [ 30.752098] The buggy address belongs to the physical page: [ 30.752771] page:00000000bedef0a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc460 [ 30.753881] memcg:ffff888014642401 [ 30.754315] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.754965] page_type: 0xffffffff() [ 30.755428] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.756374] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014642401 [ 30.757292] page dumped because: kasan: bad access detected [ 30.757962] [ 30.758182] Memory state around the buggy address: [ 30.758775] ffff88800c460a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.759644] ffff88800c460a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.760512] >ffff88800c460b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.761378] ^ [ 30.761995] ffff88800c460b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.762858] ffff88800c460c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.763728] ================================================================== [ 30.764725] Disabling lock debugging due to kernel taint [ 32.668200] BUG: Bad rss-counter state mm:0000000091acccea type:MM_FILEPAGES val:33 [ 32.669382] BUG: Bad rss-counter state mm:0000000091acccea type:MM_ANONPAGES val:22 [ 33.031031] BUG: Bad rss-counter state mm:000000005fe4d81d type:MM_FILEPAGES val:33 [ 33.032853] BUG: Bad rss-counter state mm:000000005fe4d81d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16600' (ECDSA) to the list of known hosts. 2023/06/21 02:55:46 fuzzer started 2023/06/21 02:55:46 dialing manager at localhost:36067 2023/06/21 02:55:46 checking machine... 2023/06/21 02:55:46 checking revisions... [ 33.735730] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:55:46 testing simple program... [ 33.788348] cgroup: Unknown subsys name 'net' [ 33.826903] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:55:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b38 RCX=0000000000000001 RDX=1ffff1100d9c1368 RSI=ffffffff813782f8 RDI=ffff88806ce09b40 RBP=0000000000000004 RSP=ffff88806ce09a50 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff88800fdd8000 R15=ffff888019ad58a0 RIP=ffffffff813ad4be RFL=00000212 [----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 00007f000dc68900 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=00007ffe9d246000 CR3=000000000ed50000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f89e14cac60 CR3=000000000c4d4000 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=8bd8b5bbb14137922549970ee021e05a XMM02=2c67c8bc2e329bc3000000000011bb10 XMM03=fb795ef6d657705600000000001228f0 XMM04=74d74ab2eb0e06fc00000000000ae988 XMM05=25eb9c937499fc790000000000132c58 XMM06=4fda316b135da52b0000000000132650 XMM07=e042d86d42eb936e0000000000122b70 XMM08=77dd0f1c4b0ff4a4000000000011bb70 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000