syzkaller login: [ 51.250460] BUG: Bad rss-counter state mm:00000000d9d67e95 type:MM_FILEPAGES val:33 [ 51.252047] BUG: Bad rss-counter state mm:00000000d9d67e95 type:MM_ANONPAGES val:22 [ 51.409323] ================================================================== [ 51.410256] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.411202] Read of size 8 at addr ffff88800c78dc20 by task sshd/222 [ 51.411996] [ 51.412218] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.413248] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.414272] Call Trace: [ 51.414593] [ 51.414881] dump_stack_lvl+0x91/0xf0 [ 51.415422] print_report+0xcc/0x620 [ 51.415908] ? __virt_addr_valid+0x102/0x340 [ 51.416505] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.417164] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.417803] kasan_report+0xbe/0xf0 [ 51.418290] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.418941] vma_interval_tree_remove+0xc75/0xec0 [ 51.419558] vma_prepare+0xc54/0x11a0 [ 51.420050] __split_vma+0x5af/0x950 [ 51.420549] ? __pfx___split_vma+0x10/0x10 [ 51.421104] ? find_held_lock+0x2c/0x110 [ 51.421653] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.422248] ? lock_is_held_type+0x9f/0x120 [ 51.422784] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.423396] ? mtree_range_walk+0x632/0x900 [ 51.423968] ? mas_walk+0x5c7/0x7c0 [ 51.424472] do_vmi_munmap+0x1f1/0x2b0 [ 51.424983] mmap_region+0x1f9/0x2660 [ 51.425481] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.426017] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.426774] ? __pfx_lock_acquire+0x10/0x10 [ 51.427333] ? __pfx_mmap_region+0x10/0x10 [ 51.427889] ? security_mmap_addr+0x7d/0xa0 [ 51.428447] ? get_unmapped_area+0x1f5/0x3f0 [ 51.429055] do_mmap+0x854/0xf00 [ 51.429513] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.430022] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.430610] ksys_mmap_pgoff+0x3af/0x500 [ 51.431140] do_syscall_64+0x3f/0x90 [ 51.431636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.432319] RIP: 0033:0x7f2f11d13d82 [ 51.432811] 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 [ 51.435029] RSP: 002b:00007ffe6e97bae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.435979] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f11d13d82 [ 51.436873] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f1114d000 [ 51.437760] RBP: 00007f2f1114d000 R08: 0000000000000009 R09: 0000000000001000 [ 51.438652] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0821b3ec0 [ 51.439555] R13: 00007ffe6e97bb00 R14: 00007ffe6e97bb30 R15: 00007ffe6e97be90 [ 51.440483] [ 51.440791] [ 51.441014] Allocated by task 215: [ 51.441477] kasan_save_stack+0x22/0x50 [ 51.442007] kasan_set_track+0x25/0x30 [ 51.442527] __kasan_slab_alloc+0x59/0x70 [ 51.443072] kmem_cache_alloc+0x16b/0x370 [ 51.443622] vm_area_dup+0x20/0x160 [ 51.444103] __split_vma+0x170/0x950 [ 51.444613] split_vma+0xc6/0x110 [ 51.445077] mprotect_fixup+0x8d2/0xb30 [ 51.445607] do_mprotect_pkey+0x87e/0xd40 [ 51.446159] __x64_sys_mprotect+0x78/0xc0 [ 51.446702] do_syscall_64+0x3f/0x90 [ 51.447203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.447874] [ 51.448097] Freed by task 215: [ 51.448533] kasan_save_stack+0x22/0x50 [ 51.449065] kasan_set_track+0x25/0x30 [ 51.449584] kasan_save_free_info+0x2b/0x50 [ 51.450150] __kasan_slab_free+0x10a/0x190 [ 51.450708] kmem_cache_free+0x10d/0x4d0 [ 51.451238] rcu_core+0x8c8/0x2860 [ 51.451703] __do_softirq+0x1b7/0x7d4 [ 51.452199] [ 51.452423] Last potentially related work creation: [ 51.453055] kasan_save_stack+0x22/0x50 [ 51.453599] __kasan_record_aux_stack+0x8e/0xa0 [ 51.454223] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.454868] remove_vma+0x139/0x170 [ 51.455321] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.455881] do_vmi_munmap+0x1f1/0x2b0 [ 51.456369] __vm_munmap+0x138/0x3a0 [ 51.456862] __x64_sys_munmap+0x59/0x80 [ 51.457361] do_syscall_64+0x3f/0x90 [ 51.457837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.458479] [ 51.458697] The buggy address belongs to the object at ffff88800c78dbc8 [ 51.458697] which belongs to the cache vm_area_struct of size 168 [ 51.460164] The buggy address is located 88 bytes inside of [ 51.460164] freed 168-byte region [ffff88800c78dbc8, ffff88800c78dc70) [ 51.461592] [ 51.461810] The buggy address belongs to the physical page: [ 51.462467] page:000000003a5f96cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc78d [ 51.463555] memcg:ffff88800dfcb401 [ 51.463980] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.464631] page_type: 0xffffffff() [ 51.465083] raw: 0100000000000200 ffff88800879fc80 ffffea00003f34c0 dead000000000002 [ 51.465998] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfcb401 [ 51.466910] page dumped because: kasan: bad access detected [ 51.467607] [ 51.467827] Memory state around the buggy address: [ 51.468454] ffff88800c78db00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.469345] ffff88800c78db80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 51.470230] >ffff88800c78dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 51.471101] ^ [ 51.471627] ffff88800c78dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 51.472481] ffff88800c78dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 51.473364] ================================================================== [ 51.474403] Disabling lock debugging due to kernel taint [ 53.284024] BUG: Bad rss-counter state mm:00000000774d946e type:MM_FILEPAGES val:33 [ 53.284746] BUG: Bad rss-counter state mm:00000000774d946e type:MM_ANONPAGES val:22 [ 53.758640] BUG: Bad rss-counter state mm:00000000fb6693d6 type:MM_FILEPAGES val:33 [ 53.759799] BUG: Bad rss-counter state mm:00000000fb6693d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62227' (ECDSA) to the list of known hosts. 2023/06/19 19:52:11 fuzzer started 2023/06/19 19:52:11 dialing manager at localhost:44161 2023/06/19 19:52:11 checking machine... 2023/06/19 19:52:11 checking revisions... [ 54.452337] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:52:11 testing simple program... [ 54.504636] cgroup: Unknown subsys name 'net' [ 54.556544] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:51:51 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888018e1aa00 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff88806ce09dd0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000287 R13=ffffea0000638600 R14=ffffffff818d9dc6 R15=ffff8880146fa000 RIP=ffffffff8452fd0d RFL=00000287 [--S--PC] 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 00007f302aa51900 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=00007f302b008618 CR3=000000001aa2e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fa1b0002b90 CR3=000000000d79e000 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=96f1c413677fad89df4b0a212f0a6883 XMM02=000000000011e8b8ec2efd57dc4c00df XMM03=00000000001255881e50de335dbeeeb2 XMM04=7ed9442c5106af7b00000000000ae988 XMM05=59d5b690e0af863b0000000000135070 XMM06=68e7fb051ceada000000000000133ed8 XMM07=e042d86d42eb936e0000000000125808 XMM08=1e50de335dbeeeb2000000000011e918 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000