[ 23.417259] BUG: Bad rss-counter state mm:000000000a6e1ac4 type:MM_FILEPAGES val:33 [ 23.418337] ================================================================== [ 23.418413] BUG: Bad rss-counter state mm:000000000a6e1ac4 type:MM_ANONPAGES val:22 [ 23.418956] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.420610] Read of size 8 at addr ffff88800e884140 by task sshd/218 [ 23.421080] [ 23.421219] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.421755] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.422342] Call Trace: [ 23.422536] [ 23.422716] dump_stack_lvl+0x91/0xf0 [ 23.423014] print_report+0xcc/0x620 [ 23.423318] ? __virt_addr_valid+0x102/0x340 [ 23.423752] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.424124] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.424506] kasan_report+0xbe/0xf0 [ 23.424800] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.425179] vma_interval_tree_remove+0xc75/0xec0 [ 23.425542] vma_prepare+0xc54/0x11a0 [ 23.425847] __split_vma+0x5af/0x950 [ 23.426133] ? __pfx___split_vma+0x10/0x10 [ 23.426452] ? find_held_lock+0x2c/0x110 [ 23.426768] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.427108] ? lock_is_held_type+0x9f/0x120 [ 23.427431] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.427802] ? mtree_range_walk+0x632/0x900 [ 23.428155] ? mas_walk+0x5c7/0x7c0 [ 23.428477] do_vmi_munmap+0x1f1/0x2b0 [ 23.428800] mmap_region+0x1f9/0x2660 [ 23.429113] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.429448] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.429910] ? __pfx_lock_acquire+0x10/0x10 [ 23.430253] ? __pfx_mmap_region+0x10/0x10 [ 23.430594] ? security_mmap_addr+0x7d/0xa0 [ 23.430930] ? get_unmapped_area+0x1f5/0x3f0 [ 23.431271] do_mmap+0x854/0xf00 [ 23.431551] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.431861] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.432215] ksys_mmap_pgoff+0x3af/0x500 [ 23.432543] do_syscall_64+0x3f/0x90 [ 23.432847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.433260] RIP: 0033:0x7f66d7007d82 [ 23.433551] 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 [ 23.434918] RSP: 002b:00007ffc12e55d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.435489] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66d7007d82 [ 23.436022] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66d6441000 [ 23.436562] RBP: 00007f66d6441000 R08: 0000000000000009 R09: 0000000000001000 [ 23.437095] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0e7f7cec0 [ 23.437633] R13: 00007ffc12e55d50 R14: 00007ffc12e55d80 R15: 00007ffc12e560e0 [ 23.438174] [ 23.438358] [ 23.438493] Allocated by task 211: [ 23.438764] kasan_save_stack+0x22/0x50 [ 23.439083] kasan_set_track+0x25/0x30 [ 23.439392] __kasan_slab_alloc+0x59/0x70 [ 23.439717] kmem_cache_alloc+0x16b/0x370 [ 23.440041] vm_area_dup+0x20/0x160 [ 23.440333] __split_vma+0x170/0x950 [ 23.440646] split_vma+0xc6/0x110 [ 23.440920] mprotect_fixup+0x8d2/0xb30 [ 23.441234] do_mprotect_pkey+0x87e/0xd40 [ 23.441558] __x64_sys_mprotect+0x78/0xc0 [ 23.441886] do_syscall_64+0x3f/0x90 [ 23.442181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.442583] [ 23.442716] Freed by task 211: [ 23.442961] kasan_save_stack+0x22/0x50 [ 23.443277] kasan_set_track+0x25/0x30 [ 23.443585] kasan_save_free_info+0x2b/0x50 [ 23.443922] __kasan_slab_free+0x10a/0x190 [ 23.444256] kmem_cache_free+0x10d/0x4d0 [ 23.444582] rcu_core+0x8c8/0x2860 [ 23.444865] __do_softirq+0x1b7/0x7d4 [ 23.445164] [ 23.445298] Last potentially related work creation: [ 23.445670] kasan_save_stack+0x22/0x50 [ 23.445989] __kasan_record_aux_stack+0x8e/0xa0 [ 23.446354] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.446764] remove_vma+0x139/0x170 [ 23.447045] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.447398] do_vmi_munmap+0x1f1/0x2b0 [ 23.447706] __vm_munmap+0x138/0x3a0 [ 23.447998] __x64_sys_munmap+0x59/0x80 [ 23.448313] do_syscall_64+0x3f/0x90 [ 23.448622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.449027] [ 23.449164] Second to last potentially related work creation: [ 23.449602] kasan_save_stack+0x22/0x50 [ 23.449922] __kasan_record_aux_stack+0x8e/0xa0 [ 23.450279] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.450687] remove_vma+0x139/0x170 [ 23.450971] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.451318] do_vmi_munmap+0x1f1/0x2b0 [ 23.451626] mmap_region+0x1f9/0x2660 [ 23.451923] do_mmap+0x854/0xf00 [ 23.452194] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.452511] ksys_mmap_pgoff+0x3af/0x500 [ 23.452829] do_syscall_64+0x3f/0x90 [ 23.453126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.453534] [ 23.453666] The buggy address belongs to the object at ffff88800e8840e8 [ 23.453666] which belongs to the cache vm_area_struct of size 168 [ 23.454599] The buggy address is located 88 bytes inside of [ 23.454599] freed 168-byte region [ffff88800e8840e8, ffff88800e884190) [ 23.455492] [ 23.455626] The buggy address belongs to the physical page: [ 23.456043] page:00000000b38b7efa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe884 [ 23.456738] memcg:ffff88800cb74101 [ 23.457007] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.457416] page_type: 0xffffffff() [ 23.457698] raw: 0100000000000200 ffff8880087a0c80 ffffea00003154c0 dead000000000008 [ 23.458277] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb74101 [ 23.458855] page dumped because: kasan: bad access detected [ 23.459269] [ 23.459402] Memory state around the buggy address: [ 23.459769] ffff88800e884000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.460316] ffff88800e884080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 23.460872] >ffff88800e884100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.461407] ^ [ 23.461813] ffff88800e884180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 23.462356] ffff88800e884200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.462899] ================================================================== [ 23.463517] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.734113] BUG: Bad rss-counter state mm:000000007fe5d2ef type:MM_FILEPAGES val:33 [ 25.735117] BUG: Bad rss-counter state mm:000000007fe5d2ef type:MM_ANONPAGES val:22 [ 26.109688] BUG: Bad rss-counter state mm:0000000055de6d4e type:MM_FILEPAGES val:33 [ 26.110683] BUG: Bad rss-counter state mm:0000000055de6d4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40894' (ECDSA) to the list of known hosts. 2023/06/20 17:01:16 fuzzer started 2023/06/20 17:01:16 dialing manager at localhost:36067 2023/06/20 17:01:16 checking machine... 2023/06/20 17:01:16 checking revisions... [ 26.818164] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:01:17 testing simple program... [ 26.868462] cgroup: Unknown subsys name 'net' [ 26.926128] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:01:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007faf4caa15e0 CR3=0000000013a44000 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=f9453944228631b0eb466693583d6b80 XMM02=2c67c8bc2e329bc3000000000011ae50 XMM03=fb795ef6d65770560000000000121100 XMM04=5165da35238ab58000000000000ae988 XMM05=751b9502027dc0b90000000000131fc0 XMM06=bdf2e299e47b49d50000000000131e48 XMM07=e042d86d42eb936e0000000000121380 XMM08=db0bd19e44fbcad7000000000011aeb0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800ff19b40 RSI=ffffffff81709bcb RDI=ffff88800dfa7bc8 RBP=ffff88800dfa7bc8 RSP=ffff88800a0b7a20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800dfa7bc8 R14=0000000000000000 R15=00007f0ee3a81000 RIP=ffffffff817375e4 RFL=00000293 [--S-A-C] 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 00007f0ee3a95900 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=00007f0ee3a74020 CR3=000000000e8d8000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000