syzkaller login: [ 33.239998] BUG: Bad rss-counter state mm:00000000a5ec62d2 type:MM_FILEPAGES val:33 [ 33.241181] BUG: Bad rss-counter state mm:00000000a5ec62d2 type:MM_ANONPAGES val:22 [ 33.399796] ================================================================== [ 33.400905] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.402025] Read of size 8 at addr ffff88800fdf5df0 by task sshd/221 [ 33.403111] [ 33.403376] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.404245] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.405244] Call Trace: [ 33.405571] [ 33.405859] dump_stack_lvl+0x91/0xf0 [ 33.406355] print_report+0xcc/0x620 [ 33.406848] ? __virt_addr_valid+0x102/0x340 [ 33.407404] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.408023] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.408643] kasan_report+0xbe/0xf0 [ 33.409122] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.409740] vma_interval_tree_remove+0xc75/0xec0 [ 33.410339] vma_prepare+0xc54/0x11a0 [ 33.410840] __split_vma+0x5af/0x950 [ 33.411319] ? __pfx___split_vma+0x10/0x10 [ 33.411847] ? find_held_lock+0x2c/0x110 [ 33.412370] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.412935] ? lock_is_held_type+0x9f/0x120 [ 33.413476] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.414085] ? mtree_range_walk+0x632/0x900 [ 33.414639] ? mas_walk+0x5c7/0x7c0 [ 33.415128] do_vmi_munmap+0x1f1/0x2b0 [ 33.415622] mmap_region+0x1f9/0x2660 [ 33.416111] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.416625] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.417352] ? __pfx_lock_acquire+0x10/0x10 [ 33.417888] ? __pfx_mmap_region+0x10/0x10 [ 33.418418] ? security_mmap_addr+0x7d/0xa0 [ 33.418959] ? get_unmapped_area+0x1f5/0x3f0 [ 33.419521] do_mmap+0x854/0xf00 [ 33.419958] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.420454] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.421017] ksys_mmap_pgoff+0x3af/0x500 [ 33.421525] do_syscall_64+0x3f/0x90 [ 33.422006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.422654] RIP: 0033:0x7fa497772d82 [ 33.423132] 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 [ 33.425249] RSP: 002b:00007ffeb6f74228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.426162] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa497772d82 [ 33.427025] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa496bac000 [ 33.427867] RBP: 00007fa496bac000 R08: 0000000000000009 R09: 0000000000001000 [ 33.428707] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624570e1d90 [ 33.429552] R13: 00007ffeb6f74240 R14: 00007ffeb6f74270 R15: 00007ffeb6f745d0 [ 33.430407] [ 33.430704] [ 33.430925] Allocated by task 214: [ 33.431353] kasan_save_stack+0x22/0x50 [ 33.431864] kasan_set_track+0x25/0x30 [ 33.432355] __kasan_slab_alloc+0x59/0x70 [ 33.432872] kmem_cache_alloc+0x16b/0x370 [ 33.433416] vm_area_dup+0x20/0x160 [ 33.433876] __split_vma+0x170/0x950 [ 33.434376] split_vma+0xc6/0x110 [ 33.434846] mprotect_fixup+0x8d2/0xb30 [ 33.435357] do_mprotect_pkey+0x87e/0xd40 [ 33.435896] __x64_sys_mprotect+0x78/0xc0 [ 33.436438] do_syscall_64+0x3f/0x90 [ 33.436922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.437587] [ 33.437807] Freed by task 214: [ 33.438208] kasan_save_stack+0x22/0x50 [ 33.438736] kasan_set_track+0x25/0x30 [ 33.439235] kasan_save_free_info+0x2b/0x50 [ 33.439768] __kasan_slab_free+0x10a/0x190 [ 33.440305] kmem_cache_free+0x10d/0x4d0 [ 33.440826] rcu_core+0x8c8/0x2860 [ 33.441267] __do_softirq+0x1b7/0x7d4 [ 33.441753] [ 33.441968] Last potentially related work creation: [ 33.442557] kasan_save_stack+0x22/0x50 [ 33.443075] __kasan_record_aux_stack+0x8e/0xa0 [ 33.443727] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.444392] remove_vma+0x139/0x170 [ 33.444865] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.445437] do_vmi_munmap+0x1f1/0x2b0 [ 33.445932] __vm_munmap+0x138/0x3a0 [ 33.446417] __x64_sys_munmap+0x59/0x80 [ 33.446931] do_syscall_64+0x3f/0x90 [ 33.447425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.448089] [ 33.448306] The buggy address belongs to the object at ffff88800fdf5d98 [ 33.448306] which belongs to the cache vm_area_struct of size 168 [ 33.449798] The buggy address is located 88 bytes inside of [ 33.449798] freed 168-byte region [ffff88800fdf5d98, ffff88800fdf5e40) [ 33.451270] [ 33.451487] The buggy address belongs to the physical page: [ 33.452161] page:00000000120d3bba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdf5 [ 33.453260] memcg:ffff88800f711a01 [ 33.453692] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.454418] page_type: 0xffffffff() [ 33.454901] raw: 0100000000000200 ffff88800879fc80 ffffea000039f380 dead000000000005 [ 33.455838] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f711a01 [ 33.456786] page dumped because: kasan: bad access detected [ 33.457460] [ 33.457680] Memory state around the buggy address: [ 33.458268] ffff88800fdf5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.459142] ffff88800fdf5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.460011] >ffff88800fdf5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.460893] ^ [ 33.461697] ffff88800fdf5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.462553] ffff88800fdf5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.463438] ================================================================== [ 33.464400] Disabling lock debugging due to kernel taint [ 35.439454] BUG: Bad rss-counter state mm:000000003152a477 type:MM_FILEPAGES val:33 [ 35.440272] BUG: Bad rss-counter state mm:000000003152a477 type:MM_ANONPAGES val:22 [ 36.040707] BUG: Bad rss-counter state mm:000000008b660570 type:MM_FILEPAGES val:33 [ 36.041883] BUG: Bad rss-counter state mm:000000008b660570 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2899' (ECDSA) to the list of known hosts. 2023/06/19 17:07:43 fuzzer started 2023/06/19 17:07:43 dialing manager at localhost:44161 2023/06/19 17:07:43 checking machine... 2023/06/19 17:07:43 checking revisions... [ 36.697505] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:07:43 testing simple program... [ 36.746264] cgroup: Unknown subsys name 'net' [ 36.787176] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:07:40 Registers: info registers vcpu 0 RAX=ffffea00003ef100 RBX=ffff88800fbc45f0 RCX=ffffea0000000000 RDX=ffff88800844f780 RSI=ffffffff813782a8 RDI=ffff88800844f780 RBP=ffff88806ce09e58 RSP=ffff88806ce09e30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88800844f780 R13=ffff88808fbc45f0 R14=ffffffff813782a8 R15=ffff88800fbc4670 RIP=ffffffff818098cf RFL=00000286 [--S--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 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=00007ffc00981608 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f69b81ae510000055d21cec4790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000a RCX=0000000000000000 RDX=0000000000000000 RSI=ffff88800e1b8580 RDI=ffff88801ce3e640 RBP=000000000000000b RSP=ffff888015d377b0 R8 =0000000000000004 R9 =0000000000000000 R10=ffff88800e1b85d0 R11=00000000000b6996 R12=0000000000000002 R13=ffffffff87f96b30 R14=ffffffff83c63980 R15=0000000000000006 RIP=ffffffff83c62d22 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f33bfbb5900 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=00007f33c016c618 CR3=000000000d7f0000 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