syzkaller login: [ 31.190213] BUG: Bad rss-counter state mm:0000000086eb4838 type:MM_FILEPAGES val:33 [ 31.191206] BUG: Bad rss-counter state mm:0000000086eb4838 type:MM_ANONPAGES val:22 [ 31.360707] ================================================================== [ 31.361795] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.362874] Read of size 8 at addr ffff888018292c20 by task sshd/221 [ 31.363849] [ 31.364104] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.365102] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.366262] Call Trace: [ 31.366628] [ 31.366963] dump_stack_lvl+0x91/0xf0 [ 31.367537] print_report+0xcc/0x620 [ 31.368095] ? __virt_addr_valid+0x102/0x340 [ 31.368735] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.369446] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.370175] kasan_report+0xbe/0xf0 [ 31.370731] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.371456] vma_interval_tree_remove+0xc75/0xec0 [ 31.372148] vma_prepare+0xc54/0x11a0 [ 31.372711] __split_vma+0x5af/0x950 [ 31.373264] ? __pfx___split_vma+0x10/0x10 [ 31.373910] ? find_held_lock+0x2c/0x110 [ 31.374513] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.375166] ? lock_is_held_type+0x9f/0x120 [ 31.375792] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.376493] ? mtree_range_walk+0x632/0x900 [ 31.377140] ? mas_walk+0x5c7/0x7c0 [ 31.377707] do_vmi_munmap+0x1f1/0x2b0 [ 31.378281] mmap_region+0x1f9/0x2660 [ 31.378854] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.379462] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.380312] ? __pfx_lock_acquire+0x10/0x10 [ 31.380951] ? __pfx_mmap_region+0x10/0x10 [ 31.381592] ? security_mmap_addr+0x7d/0xa0 [ 31.382229] ? get_unmapped_area+0x1f5/0x3f0 [ 31.382881] do_mmap+0x854/0xf00 [ 31.383400] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.383992] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.384664] ksys_mmap_pgoff+0x3af/0x500 [ 31.385267] do_syscall_64+0x3f/0x90 [ 31.385865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.386633] RIP: 0033:0x7f28fad0bd82 [ 31.387177] 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 [ 31.389715] RSP: 002b:00007fff83ddf498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.390795] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28fad0bd82 [ 31.391802] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28fa145000 [ 31.392809] RBP: 00007f28fa145000 R08: 0000000000000009 R09: 0000000000001000 [ 31.393828] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd10978ec0 [ 31.394832] R13: 00007fff83ddf4b0 R14: 00007fff83ddf4e0 R15: 00007fff83ddf840 [ 31.395854] [ 31.396201] [ 31.396453] Allocated by task 213: [ 31.396963] kasan_save_stack+0x22/0x50 [ 31.397583] kasan_set_track+0x25/0x30 [ 31.398175] __kasan_slab_alloc+0x59/0x70 [ 31.398801] kmem_cache_alloc+0x16b/0x370 [ 31.399418] vm_area_dup+0x20/0x160 [ 31.399956] __split_vma+0x170/0x950 [ 31.400513] split_vma+0xc6/0x110 [ 31.401035] mprotect_fixup+0x8d2/0xb30 [ 31.401638] do_mprotect_pkey+0x87e/0xd40 [ 31.402256] __x64_sys_mprotect+0x78/0xc0 [ 31.402879] do_syscall_64+0x3f/0x90 [ 31.403441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.404201] [ 31.404454] Freed by task 202: [ 31.404913] kasan_save_stack+0x22/0x50 [ 31.405503] kasan_set_track+0x25/0x30 [ 31.406111] kasan_save_free_info+0x2b/0x50 [ 31.406737] __kasan_slab_free+0x10a/0x190 [ 31.407368] kmem_cache_free+0x10d/0x4d0 [ 31.407972] rcu_core+0x8c8/0x2860 [ 31.408495] __do_softirq+0x1b7/0x7d4 [ 31.409053] [ 31.409309] Last potentially related work creation: [ 31.410005] kasan_save_stack+0x22/0x50 [ 31.410603] __kasan_record_aux_stack+0x8e/0xa0 [ 31.411271] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.412031] remove_vma+0x139/0x170 [ 31.412567] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.413226] do_vmi_munmap+0x1f1/0x2b0 [ 31.413798] __vm_munmap+0x138/0x3a0 [ 31.414350] __x64_sys_munmap+0x59/0x80 [ 31.414939] do_syscall_64+0x3f/0x90 [ 31.415503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.416255] [ 31.416507] The buggy address belongs to the object at ffff888018292bc8 [ 31.416507] which belongs to the cache vm_area_struct of size 168 [ 31.418258] The buggy address is located 88 bytes inside of [ 31.418258] freed 168-byte region [ffff888018292bc8, ffff888018292c70) [ 31.419904] [ 31.420156] The buggy address belongs to the physical page: [ 31.420935] page:00000000fd692e27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18292 [ 31.422235] memcg:ffff888016b17e01 [ 31.422742] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.423508] page_type: 0xffffffff() [ 31.424042] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bc580 000000000000000a [ 31.425124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b17e01 [ 31.426212] page dumped because: kasan: bad access detected [ 31.426993] [ 31.427245] Memory state around the buggy address: [ 31.427919] ffff888018292b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.428930] ffff888018292b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.429947] >ffff888018292c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.430936] ^ [ 31.431552] ffff888018292c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.432547] ffff888018292d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.433528] ================================================================== [ 31.435030] Disabling lock debugging due to kernel taint [ 33.452550] BUG: Bad rss-counter state mm:00000000095689ad type:MM_FILEPAGES val:33 [ 33.453727] BUG: Bad rss-counter state mm:00000000095689ad type:MM_ANONPAGES val:22 [ 33.852307] BUG: Bad rss-counter state mm:00000000fb0180a8 type:MM_FILEPAGES val:33 [ 33.853309] BUG: Bad rss-counter state mm:00000000fb0180a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1192' (ECDSA) to the list of known hosts. 2023/06/21 07:58:28 fuzzer started 2023/06/21 07:58:28 dialing manager at localhost:36067 2023/06/21 07:58:28 checking machine... 2023/06/21 07:58:28 checking revisions... [ 34.618536] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:58:28 testing simple program... [ 34.659400] cgroup: Unknown subsys name 'net' [ 34.713678] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:58:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8366a63b RDX=00000000000266a6 RSI=00000000000266a6 RDI=ffffffff86583488 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020c57 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113077a 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 00007f266e5df900 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=00007f266eb96618 CR3=000000000c5f2000 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=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=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=00007ffbbfa0da30 CR3=000000000d43c000 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=897f9f069853d29d8e41d82b1eb0cdee XMM02=000000000011a9b0ec2efd57dc4c00df XMM03=0000000000121e504fbb60bc71c97126 XMM04=ef62029af5e0cc5d00000000000ae988 XMM05=65101b286900fbf30000000000132a60 XMM06=c291bd5c70af25b90000000000131b00 XMM07=e042d86d42eb936e00000000001220d0 XMM08=4fbb60bc71c97126000000000011aa10 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000