[ 23.669105] BUG: Bad rss-counter state mm:000000004405e29c type:MM_FILEPAGES val:33 [ 23.670212] BUG: Bad rss-counter state mm:000000004405e29c type:MM_ANONPAGES val:22 [ 23.844421] ================================================================== [ 23.845567] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.846618] Read of size 8 at addr ffff88800f314880 by task sshd/219 [ 23.847664] [ 23.847911] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.848899] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.849992] Call Trace: [ 23.850353] [ 23.850676] dump_stack_lvl+0x91/0xf0 [ 23.851229] print_report+0xcc/0x620 [ 23.851779] ? __virt_addr_valid+0x102/0x340 [ 23.852432] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.853127] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.853816] kasan_report+0xbe/0xf0 [ 23.854355] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.855067] vma_interval_tree_remove+0xc75/0xec0 [ 23.855777] vma_prepare+0xc54/0x11a0 [ 23.856349] __split_vma+0x5af/0x950 [ 23.856898] ? __pfx___split_vma+0x10/0x10 [ 23.857516] ? find_held_lock+0x2c/0x110 [ 23.858120] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.858770] ? lock_is_held_type+0x9f/0x120 [ 23.859402] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.860109] ? mtree_range_walk+0x632/0x900 [ 23.860862] ? mas_walk+0x5c7/0x7c0 [ 23.861431] do_vmi_munmap+0x1f1/0x2b0 [ 23.862005] mmap_region+0x1f9/0x2660 [ 23.862566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.863155] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.863985] ? __pfx_lock_acquire+0x10/0x10 [ 23.864611] ? __pfx_mmap_region+0x10/0x10 [ 23.865240] ? security_mmap_addr+0x7d/0xa0 [ 23.865851] ? get_unmapped_area+0x1f5/0x3f0 [ 23.866497] do_mmap+0x854/0xf00 [ 23.867005] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.867590] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.868248] ksys_mmap_pgoff+0x3af/0x500 [ 23.868840] do_syscall_64+0x3f/0x90 [ 23.869393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.870150] RIP: 0033:0x7faf93009d82 [ 23.870681] 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 [ 23.873185] RSP: 002b:00007fff99c396d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.874235] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf93009d82 [ 23.875228] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf92443000 [ 23.876229] RBP: 00007faf92443000 R08: 0000000000000009 R09: 0000000000001000 [ 23.877218] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e6cc621ec0 [ 23.878208] R13: 00007fff99c396f0 R14: 00007fff99c39720 R15: 00007fff99c39a80 [ 23.879198] [ 23.879537] [ 23.879782] Allocated by task 212: [ 23.880291] kasan_save_stack+0x22/0x50 [ 23.880872] kasan_set_track+0x25/0x30 [ 23.881447] __kasan_slab_alloc+0x59/0x70 [ 23.882052] kmem_cache_alloc+0x16b/0x370 [ 23.882644] vm_area_dup+0x20/0x160 [ 23.883176] __split_vma+0x170/0x950 [ 23.883709] split_vma+0xc6/0x110 [ 23.884215] mprotect_fixup+0x8d2/0xb30 [ 23.884787] do_mprotect_pkey+0x87e/0xd40 [ 23.885387] __x64_sys_mprotect+0x78/0xc0 [ 23.885989] do_syscall_64+0x3f/0x90 [ 23.886532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.887278] [ 23.887523] Freed by task 212: [ 23.887973] kasan_save_stack+0x22/0x50 [ 23.888550] kasan_set_track+0x25/0x30 [ 23.889196] kasan_save_free_info+0x2b/0x50 [ 23.889818] __kasan_slab_free+0x10a/0x190 [ 23.890438] kmem_cache_free+0x10d/0x4d0 [ 23.891019] rcu_core+0x8c8/0x2860 [ 23.891530] __do_softirq+0x1b7/0x7d4 [ 23.892078] [ 23.892350] Last potentially related work creation: [ 23.893035] kasan_save_stack+0x22/0x50 [ 23.893615] __kasan_record_aux_stack+0x8e/0xa0 [ 23.894281] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.895031] remove_vma+0x139/0x170 [ 23.895559] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.896215] do_vmi_munmap+0x1f1/0x2b0 [ 23.896770] __vm_munmap+0x138/0x3a0 [ 23.897315] __x64_sys_munmap+0x59/0x80 [ 23.897883] do_syscall_64+0x3f/0x90 [ 23.898438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.899176] [ 23.899423] The buggy address belongs to the object at ffff88800f314828 [ 23.899423] which belongs to the cache vm_area_struct of size 168 [ 23.901143] The buggy address is located 88 bytes inside of [ 23.901143] freed 168-byte region [ffff88800f314828, ffff88800f3148d0) [ 23.902718] [ 23.902954] The buggy address belongs to the physical page: [ 23.903679] page:000000003f214d60 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf314 [ 23.904876] memcg:ffff888019a35d01 [ 23.905346] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.906047] page_type: 0xffffffff() [ 23.906541] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.907574] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a35d01 [ 23.908612] page dumped because: kasan: bad access detected [ 23.909386] [ 23.909624] Memory state around the buggy address: [ 23.910295] ffff88800f314780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 23.911253] ffff88800f314800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 23.912232] >ffff88800f314880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 23.913170] ^ [ 23.913622] ffff88800f314900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.914582] ffff88800f314980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 23.915527] ================================================================== [ 23.916712] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.490899] BUG: Bad rss-counter state mm:00000000b0e2c5a3 type:MM_FILEPAGES val:33 [ 25.491659] BUG: Bad rss-counter state mm:00000000b0e2c5a3 type:MM_ANONPAGES val:22 [ 25.977975] BUG: Bad rss-counter state mm:000000000b23c13d type:MM_FILEPAGES val:33 [ 25.978996] BUG: Bad rss-counter state mm:000000000b23c13d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50928' (ECDSA) to the list of known hosts. 2023/06/20 14:45:24 fuzzer started 2023/06/20 14:45:24 dialing manager at localhost:36067 2023/06/20 14:45:24 checking machine... 2023/06/20 14:45:24 checking revisions... [ 26.749257] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:45:24 testing simple program... [ 26.802921] cgroup: Unknown subsys name 'net' [ 26.842056] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:45:23 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=00007fff048d0ef8 CR3=0000000005482000 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=00007f70a1480510000055e14c347790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000010 RCX=0000000000000000 RDX=ffff888016f7d1c0 RSI=0000000000000009 RDI=0000000000000002 RBP=ffff88800daed008 RSP=ffff888016c27ce0 R8 =0000000000000006 R9 =00007ffd53d2efe8 R10=00007ff2c7616fff R11=0000000000000000 R12=0000000000000002 R13=0000000000000009 R14=00007ffd53d2efe8 R15=00007ff2c7616fff RIP=ffffffff814c02e0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff2c6a75900 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=00007ffd53d2efe8 CR3=000000000ed84000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000