[ 23.942343] BUG: Bad rss-counter state mm:00000000dae34ba7 type:MM_FILEPAGES val:33 [ 23.943019] BUG: Bad rss-counter state mm:00000000dae34ba7 type:MM_ANONPAGES val:22 [ 24.079441] ================================================================== [ 24.080365] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.081325] Read of size 8 at addr ffff88801bc80310 by task sshd/219 [ 24.082113] [ 24.082339] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.083332] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.084320] Call Trace: [ 24.084643] [ 24.084928] dump_stack_lvl+0x91/0xf0 [ 24.085433] print_report+0xcc/0x620 [ 24.085950] ? __virt_addr_valid+0x102/0x340 [ 24.086508] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.087143] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.087777] kasan_report+0xbe/0xf0 [ 24.088271] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.088905] vma_interval_tree_remove+0xc75/0xec0 [ 24.089515] vma_prepare+0xc54/0x11a0 [ 24.090010] __split_vma+0x5af/0x950 [ 24.090493] ? __pfx___split_vma+0x10/0x10 [ 24.091030] ? find_held_lock+0x2c/0x110 [ 24.091558] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.092135] ? lock_is_held_type+0x9f/0x120 [ 24.092680] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.093293] ? mtree_range_walk+0x632/0x900 [ 24.093861] ? mas_walk+0x5c7/0x7c0 [ 24.094353] do_vmi_munmap+0x1f1/0x2b0 [ 24.094849] mmap_region+0x1f9/0x2660 [ 24.095339] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.095858] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.096587] ? __pfx_lock_acquire+0x10/0x10 [ 24.097125] ? __pfx_mmap_region+0x10/0x10 [ 24.097664] ? security_mmap_addr+0x7d/0xa0 [ 24.098218] ? get_unmapped_area+0x1f5/0x3f0 [ 24.098775] do_mmap+0x854/0xf00 [ 24.099223] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.099725] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.100298] ksys_mmap_pgoff+0x3af/0x500 [ 24.100813] do_syscall_64+0x3f/0x90 [ 24.101298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.101962] RIP: 0033:0x7fea0f741d82 [ 24.102419] 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 [ 24.104584] RSP: 002b:00007ffe488c58b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.105509] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea0f741d82 [ 24.106402] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea0eb7b000 [ 24.107260] RBP: 00007fea0eb7b000 R08: 0000000000000009 R09: 0000000000001000 [ 24.108119] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c41ab1cec0 [ 24.108986] R13: 00007ffe488c58d0 R14: 00007ffe488c5900 R15: 00007ffe488c5c60 [ 24.109869] [ 24.110170] [ 24.110389] Allocated by task 212: [ 24.110824] kasan_save_stack+0x22/0x50 [ 24.111351] kasan_set_track+0x25/0x30 [ 24.111847] __kasan_slab_alloc+0x59/0x70 [ 24.112378] kmem_cache_alloc+0x16b/0x370 [ 24.112902] vm_area_dup+0x20/0x160 [ 24.113360] __split_vma+0x170/0x950 [ 24.113833] split_vma+0xc6/0x110 [ 24.114280] mprotect_fixup+0x8d2/0xb30 [ 24.114792] do_mprotect_pkey+0x87e/0xd40 [ 24.115325] __x64_sys_mprotect+0x78/0xc0 [ 24.115848] do_syscall_64+0x3f/0x90 [ 24.116329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.116978] [ 24.117199] Freed by task 0: [ 24.117584] kasan_save_stack+0x22/0x50 [ 24.118117] kasan_set_track+0x25/0x30 [ 24.118614] kasan_save_free_info+0x2b/0x50 [ 24.119153] __kasan_slab_free+0x10a/0x190 [ 24.119708] kmem_cache_free+0x10d/0x4d0 [ 24.120235] rcu_core+0x8c8/0x2860 [ 24.120687] __do_softirq+0x1b7/0x7d4 [ 24.121174] [ 24.121393] Last potentially related work creation: [ 24.122001] kasan_save_stack+0x22/0x50 [ 24.122509] __kasan_record_aux_stack+0x8e/0xa0 [ 24.123092] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.123746] remove_vma+0x139/0x170 [ 24.124212] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.124891] do_vmi_munmap+0x1f1/0x2b0 [ 24.125372] __vm_munmap+0x138/0x3a0 [ 24.125838] __x64_sys_munmap+0x59/0x80 [ 24.126326] do_syscall_64+0x3f/0x90 [ 24.126800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.127430] [ 24.127642] The buggy address belongs to the object at ffff88801bc802b8 [ 24.127642] which belongs to the cache vm_area_struct of size 168 [ 24.129095] The buggy address is located 88 bytes inside of [ 24.129095] freed 168-byte region [ffff88801bc802b8, ffff88801bc80360) [ 24.130496] [ 24.130713] The buggy address belongs to the physical page: [ 24.131362] page:000000003899bc7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc80 [ 24.132434] memcg:ffff88801a3cbd01 [ 24.132859] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.133495] page_type: 0xffffffff() [ 24.133948] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.134855] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3cbd01 [ 24.135751] page dumped because: kasan: bad access detected [ 24.136401] [ 24.136617] Memory state around the buggy address: [ 24.137192] ffff88801bc80200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.138045] ffff88801bc80280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.138893] >ffff88801bc80300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.139735] ^ [ 24.140194] ffff88801bc80380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.141043] ffff88801bc80400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.141889] ================================================================== [ 24.143104] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.822752] BUG: Bad rss-counter state mm:00000000b6a3ecab type:MM_FILEPAGES val:33 [ 25.824245] BUG: Bad rss-counter state mm:00000000b6a3ecab type:MM_ANONPAGES val:22 [ 26.215270] BUG: Bad rss-counter state mm:00000000709c2de3 type:MM_FILEPAGES val:33 [ 26.216504] BUG: Bad rss-counter state mm:00000000709c2de3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27257' (ECDSA) to the list of known hosts. 2023/06/20 13:58:08 fuzzer started 2023/06/20 13:58:09 dialing manager at localhost:36067 2023/06/20 13:58:09 checking machine... 2023/06/20 13:58:09 checking revisions... [ 26.969832] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:58:09 testing simple program... [ 27.017724] cgroup: Unknown subsys name 'net' [ 27.072606] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:58:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880186377e0 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffff8880186377d0 RDI=ffff88806ce09aa8 RBP=ffff888018630000 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000979d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff8880186377d0 R15=ffff88806ce09a98 RIP=ffffffff81131ca6 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f016241c900 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=00007f01629d1650 CR3=000000000f2b0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800cbab410 RBX=ffff88806cf09ee8 RCX=1ffff11001975682 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff88806cf09ef8 RBP=0000000000000001 RSP=ffff88806cf09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff88800e6c0c00 RIP=ffffffff8137fcd4 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 00007f7a565b8900 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=00007f7a559ba620 CR3=000000000c7da000 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=88c31ed1f422c48f00000000000ae988 XMM05=2665518097d68f470000000000132550 XMM06=806171799158d9670000000000130fd0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000