[ 24.862278] BUG: Bad rss-counter state mm:00000000ed5000bc type:MM_FILEPAGES val:33 [ 24.863411] BUG: Bad rss-counter state mm:00000000ed5000bc type:MM_ANONPAGES val:22 [ 25.168259] ================================================================== [ 25.169281] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.170164] Read of size 8 at addr ffff88801a66ced8 by task sshd/221 [ 25.171103] [ 25.171314] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.172134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.173070] Call Trace: [ 25.173377] [ 25.173653] dump_stack_lvl+0x91/0xf0 [ 25.174117] print_report+0xcc/0x620 [ 25.174574] ? __virt_addr_valid+0x102/0x340 [ 25.175092] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.175675] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.176267] kasan_report+0xbe/0xf0 [ 25.176716] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.177303] vma_interval_tree_remove+0xc75/0xec0 [ 25.177871] vma_prepare+0xc54/0x11a0 [ 25.178328] __split_vma+0x5af/0x950 [ 25.178773] ? __pfx___split_vma+0x10/0x10 [ 25.179278] ? find_held_lock+0x2c/0x110 [ 25.179809] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.180408] ? lock_is_held_type+0x9f/0x120 [ 25.180951] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.181588] ? mtree_range_walk+0x632/0x900 [ 25.182152] ? mas_walk+0x5c7/0x7c0 [ 25.182658] do_vmi_munmap+0x1f1/0x2b0 [ 25.183172] mmap_region+0x1f9/0x2660 [ 25.183648] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.184173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.184903] ? __pfx_lock_acquire+0x10/0x10 [ 25.185443] ? __pfx_mmap_region+0x10/0x10 [ 25.185975] ? security_mmap_addr+0x7d/0xa0 [ 25.186521] ? get_unmapped_area+0x1f5/0x3f0 [ 25.187070] do_mmap+0x854/0xf00 [ 25.187525] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.188025] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.188610] ksys_mmap_pgoff+0x3af/0x500 [ 25.189118] do_syscall_64+0x3f/0x90 [ 25.189602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.190255] RIP: 0033:0x7facc496ed82 [ 25.190710] 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 [ 25.192833] RSP: 002b:00007ffdfe2d2878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.193735] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007facc496ed82 [ 25.194614] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007facc3da8000 [ 25.195462] RBP: 00007facc3da8000 R08: 0000000000000009 R09: 0000000000001000 [ 25.196330] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3f55f9ec0 [ 25.197172] R13: 00007ffdfe2d2890 R14: 00007ffdfe2d28c0 R15: 00007ffdfe2d2c20 [ 25.198060] [ 25.198364] [ 25.198582] Allocated by task 208: [ 25.199041] kasan_save_stack+0x22/0x50 [ 25.199560] kasan_set_track+0x25/0x30 [ 25.200071] __kasan_slab_alloc+0x59/0x70 [ 25.200620] kmem_cache_alloc+0x16b/0x370 [ 25.201142] vm_area_dup+0x20/0x160 [ 25.201596] __split_vma+0x170/0x950 [ 25.202057] split_vma+0xc6/0x110 [ 25.202502] mprotect_fixup+0x8d2/0xb30 [ 25.203021] do_mprotect_pkey+0x87e/0xd40 [ 25.203571] __x64_sys_mprotect+0x78/0xc0 [ 25.204145] do_syscall_64+0x3f/0x90 [ 25.204658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.205338] [ 25.205560] Freed by task 207: [ 25.205976] kasan_save_stack+0x22/0x50 [ 25.206508] kasan_set_track+0x25/0x30 [ 25.207034] kasan_save_free_info+0x2b/0x50 [ 25.207602] __kasan_slab_free+0x10a/0x190 [ 25.208178] kmem_cache_free+0x10d/0x4d0 [ 25.208716] rcu_core+0x8c8/0x2860 [ 25.209170] __do_softirq+0x1b7/0x7d4 [ 25.209660] [ 25.209879] Last potentially related work creation: [ 25.210463] kasan_save_stack+0x22/0x50 [ 25.210984] __kasan_record_aux_stack+0x8e/0xa0 [ 25.211580] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.212360] remove_vma+0x139/0x170 [ 25.212832] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.213417] do_vmi_munmap+0x1f1/0x2b0 [ 25.213915] __vm_munmap+0x138/0x3a0 [ 25.214402] __x64_sys_munmap+0x59/0x80 [ 25.214900] do_syscall_64+0x3f/0x90 [ 25.215379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.216027] [ 25.216263] The buggy address belongs to the object at ffff88801a66ce80 [ 25.216263] which belongs to the cache vm_area_struct of size 168 [ 25.217758] The buggy address is located 88 bytes inside of [ 25.217758] freed 168-byte region [ffff88801a66ce80, ffff88801a66cf28) [ 25.219198] [ 25.219415] The buggy address belongs to the physical page: [ 25.220080] page:0000000078ef5182 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a66c [ 25.221175] memcg:ffff88801a5f9d01 [ 25.221615] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.222292] page_type: 0xffffffff() [ 25.222750] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.223665] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a5f9d01 [ 25.224603] page dumped because: kasan: bad access detected [ 25.225259] [ 25.225477] Memory state around the buggy address: [ 25.226059] ffff88801a66cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.226914] ffff88801a66ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 25.227767] >ffff88801a66ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.228624] ^ [ 25.229346] ffff88801a66cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 25.230193] ffff88801a66cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.231044] ================================================================== [ 25.231968] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.537663] BUG: Bad rss-counter state mm:000000006d6b0140 type:MM_FILEPAGES val:33 [ 27.538618] BUG: Bad rss-counter state mm:000000006d6b0140 type:MM_ANONPAGES val:22 [ 28.016717] BUG: Bad rss-counter state mm:0000000015a776cf type:MM_FILEPAGES val:33 [ 28.017893] BUG: Bad rss-counter state mm:0000000015a776cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56268' (ECDSA) to the list of known hosts. 2023/06/20 04:54:12 fuzzer started 2023/06/20 04:54:13 dialing manager at localhost:44161 2023/06/20 04:54:13 checking machine... 2023/06/20 04:54:13 checking revisions... [ 28.689201] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:54:13 testing simple program... [ 28.739905] cgroup: Unknown subsys name 'net' [ 28.799151] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:54:11 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=00007f31423ef650 CR3=0000000010178000 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=2032313a34353a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a34353a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff854eea70 RCX=0000000000000000 RDX=ffff888015f4d1c0 RSI=0000000000000001 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888014757600 R8 =0000000000000005 R9 =0000000000000005 R10=0000000000000001 R11=00000000000b6c88 R12=0000000000000000 R13=0000000000000001 R14=ffffffff854eea70 R15=ffffffff854ee9e0 RIP=ffffffff814c0380 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9365c8c900 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=00007f93651061f0 CR3=000000000d5f4000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=52e3728d0336f9ec00000000000ae988 XMM05=f1faaae19c86ec640000000000133f78 XMM06=c291bd5c70af25b900000000001329f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000