syzkaller login: [ 29.296867] BUG: Bad rss-counter state mm:000000008e89d167 type:MM_FILEPAGES val:33 [ 29.298124] BUG: Bad rss-counter state mm:000000008e89d167 type:MM_ANONPAGES val:22 [ 29.461127] ================================================================== [ 29.462071] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.463024] Read of size 8 at addr ffff88800eab5b38 by task sshd/219 [ 29.463917] [ 29.464137] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.465026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.466072] Call Trace: [ 29.466395] <TASK> [ 29.466684] dump_stack_lvl+0x91/0xf0 [ 29.467200] print_report+0xcc/0x620 [ 29.467685] ? __virt_addr_valid+0x102/0x340 [ 29.468246] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.468875] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.469545] kasan_report+0xbe/0xf0 [ 29.470058] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.470681] vma_interval_tree_remove+0xc75/0xec0 [ 29.471307] vma_prepare+0xc54/0x11a0 [ 29.471793] __split_vma+0x5af/0x950 [ 29.472308] ? __pfx___split_vma+0x10/0x10 [ 29.472848] ? find_held_lock+0x2c/0x110 [ 29.473420] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.474036] ? lock_is_held_type+0x9f/0x120 [ 29.474582] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.475207] ? mtree_range_walk+0x632/0x900 [ 29.475757] ? mas_walk+0x5c7/0x7c0 [ 29.476249] do_vmi_munmap+0x1f1/0x2b0 [ 29.476748] mmap_region+0x1f9/0x2660 [ 29.477260] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.477784] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.478537] ? __pfx_lock_acquire+0x10/0x10 [ 29.479103] ? __pfx_mmap_region+0x10/0x10 [ 29.479640] ? security_mmap_addr+0x7d/0xa0 [ 29.480187] ? get_unmapped_area+0x1f5/0x3f0 [ 29.480743] do_mmap+0x854/0xf00 [ 29.481234] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.481734] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.482325] ksys_mmap_pgoff+0x3af/0x500 [ 29.482843] do_syscall_64+0x3f/0x90 [ 29.483357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.484030] RIP: 0033:0x7fef9a7c3d82 [ 29.484489] 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 [ 29.486673] RSP: 002b:00007ffe654ee0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.487601] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef9a7c3d82 [ 29.488462] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef99bfd000 [ 29.489336] RBP: 00007fef99bfd000 R08: 0000000000000009 R09: 0000000000001000 [ 29.490217] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612048c7b20 [ 29.491093] R13: 00007ffe654ee0e0 R14: 00007ffe654ee110 R15: 00007ffe654ee470 [ 29.491971] </TASK> [ 29.492266] [ 29.492483] Allocated by task 212: [ 29.492934] kasan_save_stack+0x22/0x50 [ 29.493544] kasan_set_track+0x25/0x30 [ 29.494134] __kasan_slab_alloc+0x59/0x70 [ 29.494732] kmem_cache_alloc+0x16b/0x370 [ 29.495327] vm_area_dup+0x20/0x160 [ 29.495766] __split_vma+0x170/0x950 [ 29.496211] split_vma+0xc6/0x110 [ 29.496632] mprotect_fixup+0x8d2/0xb30 [ 29.497123] do_mprotect_pkey+0x87e/0xd40 [ 29.497629] __x64_sys_mprotect+0x78/0xc0 [ 29.498128] do_syscall_64+0x3f/0x90 [ 29.498579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.499185] [ 29.499391] Freed by task 212: [ 29.499767] kasan_save_stack+0x22/0x50 [ 29.500250] kasan_set_track+0x25/0x30 [ 29.500729] kasan_save_free_info+0x2b/0x50 [ 29.501258] __kasan_slab_free+0x10a/0x190 [ 29.501772] kmem_cache_free+0x10d/0x4d0 [ 29.502261] rcu_core+0x8c8/0x2860 [ 29.502692] __do_softirq+0x1b7/0x7d4 [ 29.503162] [ 29.503376] Last potentially related work creation: [ 29.503967] kasan_save_stack+0x22/0x50 [ 29.504477] __kasan_record_aux_stack+0x8e/0xa0 [ 29.505053] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.505725] remove_vma+0x139/0x170 [ 29.506170] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.506727] do_vmi_munmap+0x1f1/0x2b0 [ 29.507215] __vm_munmap+0x138/0x3a0 [ 29.507686] __x64_sys_munmap+0x59/0x80 [ 29.508181] do_syscall_64+0x3f/0x90 [ 29.508657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.509319] [ 29.509540] The buggy address belongs to the object at ffff88800eab5ae0 [ 29.509540] which belongs to the cache vm_area_struct of size 168 [ 29.511011] The buggy address is located 88 bytes inside of [ 29.511011] freed 168-byte region [ffff88800eab5ae0, ffff88800eab5b88) [ 29.512415] [ 29.512632] The buggy address belongs to the physical page: [ 29.513300] page:00000000c4028806 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeab5 [ 29.514381] memcg:ffff88800e5a9c01 [ 29.514806] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.515448] page_type: 0xffffffff() [ 29.515909] raw: 0100000000000200 ffff88800879fc80 ffffea0000371540 dead000000000006 [ 29.516827] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5a9c01 [ 29.517747] page dumped because: kasan: bad access detected [ 29.518405] [ 29.518620] Memory state around the buggy address: [ 29.519196] ffff88800eab5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.520054] ffff88800eab5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.520904] >ffff88800eab5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.521748] ^ [ 29.522353] ffff88800eab5b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 29.523213] ffff88800eab5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.524058] ================================================================== [ 29.525084] Disabling lock debugging due to kernel taint [ 31.529952] BUG: Bad rss-counter state mm:00000000b29dceb2 type:MM_FILEPAGES val:33 [ 31.531100] BUG: Bad rss-counter state mm:00000000b29dceb2 type:MM_ANONPAGES val:22 [ 31.911474] BUG: Bad rss-counter state mm:000000002e8f6054 type:MM_FILEPAGES val:33 [ 31.912481] BUG: Bad rss-counter state mm:000000002e8f6054 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23623' (ECDSA) to the list of known hosts. 2023/06/20 03:09:34 fuzzer started 2023/06/20 03:09:35 dialing manager at localhost:44161 2023/06/20 03:09:35 checking machine... 2023/06/20 03:09:35 checking revisions... [ 32.712278] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:09:35 testing simple program... [ 32.762718] cgroup: Unknown subsys name 'net' [ 32.847804] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:09:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff28289438 CR3=0000000018e36000 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=2034333a39303a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a39303a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888018fb2700 RCX=ffffffff83876b12 RDX=ffff88800f06d1c0 RSI=0000000000000000 RDI=0000000000000003 RBP=ffff88800db7e140 RSP=ffff88801614f980 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=dffffc0000000000 R13=0000000000000001 R14=ffff888018fb2706 R15=ffff88801614f9f0 RIP=ffffffff814c07eb 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 00007fe67d12e900 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=00007fe67d6e5618 CR3=000000000ca80000 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