[ 24.215828] BUG: Bad rss-counter state mm:00000000fe68a67c type:MM_FILEPAGES val:33 [ 24.216906] BUG: Bad rss-counter state mm:00000000fe68a67c type:MM_ANONPAGES val:22 [ 24.318290] ================================================================== [ 24.319035] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.319789] Read of size 8 at addr ffff888019738140 by task sshd/220 [ 24.320422] [ 24.320594] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.321293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.322222] Call Trace: [ 24.322475] [ 24.322696] dump_stack_lvl+0x91/0xf0 [ 24.323094] print_report+0xcc/0x620 [ 24.323473] ? __virt_addr_valid+0x102/0x340 [ 24.323909] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.324441] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.324949] kasan_report+0xbe/0xf0 [ 24.325289] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.325759] vma_interval_tree_remove+0xc75/0xec0 [ 24.326196] vma_prepare+0xc54/0x11a0 [ 24.326564] __split_vma+0x5af/0x950 [ 24.326910] ? __pfx___split_vma+0x10/0x10 [ 24.327305] ? find_held_lock+0x2c/0x110 [ 24.327683] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.328104] ? lock_is_held_type+0x9f/0x120 [ 24.328505] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.328965] ? mtree_range_walk+0x632/0x900 [ 24.329373] ? mas_walk+0x5c7/0x7c0 [ 24.329727] do_vmi_munmap+0x1f1/0x2b0 [ 24.330097] mmap_region+0x1f9/0x2660 [ 24.330457] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.330842] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.331369] ? __pfx_lock_acquire+0x10/0x10 [ 24.331762] ? __pfx_mmap_region+0x10/0x10 [ 24.332152] ? security_mmap_addr+0x7d/0xa0 [ 24.332533] ? get_unmapped_area+0x1f5/0x3f0 [ 24.332954] do_mmap+0x854/0xf00 [ 24.333264] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.333635] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.334061] ksys_mmap_pgoff+0x3af/0x500 [ 24.334430] do_syscall_64+0x3f/0x90 [ 24.334777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.335254] RIP: 0033:0x7fd7ac036d82 [ 24.335590] 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 [ 24.337174] RSP: 002b:00007ffe8000fcd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.337843] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd7ac036d82 [ 24.338476] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd7ab470000 [ 24.339101] RBP: 00007fd7ab470000 R08: 0000000000000009 R09: 0000000000001000 [ 24.339731] R10: 0000000000000812 R11: 0000000000000206 R12: 00005650f2a2bb20 [ 24.340368] R13: 00007ffe8000fcf0 R14: 00007ffe8000fd20 R15: 00007ffe80010080 [ 24.341001] [ 24.341208] [ 24.341365] Allocated by task 213: [ 24.341672] kasan_save_stack+0x22/0x50 [ 24.342055] kasan_set_track+0x25/0x30 [ 24.342418] __kasan_slab_alloc+0x59/0x70 [ 24.342813] kmem_cache_alloc+0x16b/0x370 [ 24.343198] vm_area_dup+0x20/0x160 [ 24.343531] __split_vma+0x170/0x950 [ 24.343884] split_vma+0xc6/0x110 [ 24.344209] mprotect_fixup+0x8d2/0xb30 [ 24.344570] do_mprotect_pkey+0x87e/0xd40 [ 24.344958] __x64_sys_mprotect+0x78/0xc0 [ 24.345349] do_syscall_64+0x3f/0x90 [ 24.345700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.346172] [ 24.346336] Freed by task 213: [ 24.346625] kasan_save_stack+0x22/0x50 [ 24.347005] kasan_set_track+0x25/0x30 [ 24.347364] kasan_save_free_info+0x2b/0x50 [ 24.347765] __kasan_slab_free+0x10a/0x190 [ 24.348169] kmem_cache_free+0x10d/0x4d0 [ 24.348544] rcu_core+0x8c8/0x2860 [ 24.348918] __do_softirq+0x1b7/0x7d4 [ 24.349269] [ 24.349422] Last potentially related work creation: [ 24.349858] kasan_save_stack+0x22/0x50 [ 24.350219] __kasan_record_aux_stack+0x8e/0xa0 [ 24.350636] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.351110] remove_vma+0x139/0x170 [ 24.351440] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.351856] do_vmi_munmap+0x1f1/0x2b0 [ 24.352220] __vm_munmap+0x138/0x3a0 [ 24.352562] __x64_sys_munmap+0x59/0x80 [ 24.352934] do_syscall_64+0x3f/0x90 [ 24.353286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.353772] [ 24.353929] The buggy address belongs to the object at ffff8880197380e8 [ 24.353929] which belongs to the cache vm_area_struct of size 168 [ 24.355040] The buggy address is located 88 bytes inside of [ 24.355040] freed 168-byte region [ffff8880197380e8, ffff888019738190) [ 24.356127] [ 24.356286] The buggy address belongs to the physical page: [ 24.356780] page:00000000c6f8a281 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19738 [ 24.357581] memcg:ffff888019680501 [ 24.357893] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.358375] page_type: 0xffffffff() [ 24.358711] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.359404] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019680501 [ 24.360087] page dumped because: kasan: bad access detected [ 24.360578] [ 24.360747] Memory state around the buggy address: [ 24.361176] ffff888019738000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.361797] ffff888019738080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 24.362448] >ffff888019738100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.363092] ^ [ 24.363572] ffff888019738180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.364203] ffff888019738200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.364842] ================================================================== [ 24.365539] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.183055] BUG: Bad rss-counter state mm:00000000f06986f0 type:MM_FILEPAGES val:33 [ 26.184006] BUG: Bad rss-counter state mm:00000000f06986f0 type:MM_ANONPAGES val:22 [ 26.633567] BUG: Bad rss-counter state mm:0000000033a208b7 type:MM_FILEPAGES val:33 [ 26.634691] BUG: Bad rss-counter state mm:0000000033a208b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17406' (ECDSA) to the list of known hosts. 2023/06/19 18:20:17 fuzzer started 2023/06/19 18:20:17 dialing manager at localhost:44161 2023/06/19 18:20:17 checking machine... 2023/06/19 18:20:17 checking revisions... [ 27.288269] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:20:17 testing simple program... [ 27.339730] cgroup: Unknown subsys name 'net' [ 27.374839] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:20:16 Registers: info registers vcpu 0 RAX=ffff8880195b7e60 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880195b7a01 RSI=ffff8880195b7af0 RDI=ffff8880195b7af0 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000009a9d0 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff8880195b7af0 R15=ffff88806ce09a78 RIP=ffffffff8112fbf3 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 00007f6058ed4700 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=00007ff898b860b0 CR3=0000000015faa000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036313a3032 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343937 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015cc8001 RBX=ffff888015cc7b48 RCX=0000000000000001 RDX=ffff888015cc7b50 RSI=ffff888015cc7b38 RDI=ffff88806cf09aa8 RBP=ffff888015cc0000 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888015cc7b38 R15=ffff88806cf09a98 RIP=ffffffff8113128d RFL=00000287 [--S--PC] 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 00007ff8985ce900 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=00007ffc29fc3000 CR3=000000000ef76000 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=6720646572637465733a4d41503d706f 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