[ 31.001094] BUG: Bad rss-counter state mm:00000000548f1225 type:MM_FILEPAGES val:33 [ 31.001774] BUG: Bad rss-counter state mm:00000000548f1225 type:MM_ANONPAGES val:22 [ 31.166535] ================================================================== [ 31.167441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.168385] Read of size 8 at addr ffff88800f811c20 by task sshd/226 [ 31.169281] [ 31.169498] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.170354] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.171321] Call Trace: [ 31.171641] [ 31.171925] dump_stack_lvl+0x91/0xf0 [ 31.172414] print_report+0xcc/0x620 [ 31.172898] ? __virt_addr_valid+0x102/0x340 [ 31.173469] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.174086] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.174699] kasan_report+0xbe/0xf0 [ 31.175173] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.175795] vma_interval_tree_remove+0xc75/0xec0 [ 31.176401] vma_prepare+0xc54/0x11a0 [ 31.176880] __split_vma+0x5af/0x950 [ 31.177380] ? __pfx___split_vma+0x10/0x10 [ 31.177913] ? find_held_lock+0x2c/0x110 [ 31.178442] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.179012] ? lock_is_held_type+0x9f/0x120 [ 31.179554] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.180155] ? mtree_range_walk+0x632/0x900 [ 31.180713] ? mas_walk+0x5c7/0x7c0 [ 31.181209] do_vmi_munmap+0x1f1/0x2b0 [ 31.181708] mmap_region+0x1f9/0x2660 [ 31.182191] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.182711] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.183426] ? __pfx_lock_acquire+0x10/0x10 [ 31.183961] ? __pfx_mmap_region+0x10/0x10 [ 31.184498] ? security_mmap_addr+0x7d/0xa0 [ 31.185052] ? get_unmapped_area+0x1f5/0x3f0 [ 31.185610] do_mmap+0x854/0xf00 [ 31.186050] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.186546] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.187113] ksys_mmap_pgoff+0x3af/0x500 [ 31.187623] do_syscall_64+0x3f/0x90 [ 31.188107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.188759] RIP: 0033:0x7fba540e3d82 [ 31.189232] 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 [ 31.191354] RSP: 002b:00007ffd213a6438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.192251] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba540e3d82 [ 31.193109] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba5351d000 [ 31.193964] RBP: 00007fba5351d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.194812] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d5dfbaff70 [ 31.195657] R13: 00007ffd213a6450 R14: 00007ffd213a6480 R15: 00007ffd213a67e0 [ 31.196527] [ 31.196816] [ 31.197041] Allocated by task 211: [ 31.197469] kasan_save_stack+0x22/0x50 [ 31.197987] kasan_set_track+0x25/0x30 [ 31.198478] __kasan_slab_alloc+0x59/0x70 [ 31.199008] kmem_cache_alloc+0x16b/0x370 [ 31.199520] vm_area_dup+0x20/0x160 [ 31.199974] __split_vma+0x170/0x950 [ 31.200458] split_vma+0xc6/0x110 [ 31.200895] mprotect_fixup+0x8d2/0xb30 [ 31.201410] do_mprotect_pkey+0x87e/0xd40 [ 31.201933] __x64_sys_mprotect+0x78/0xc0 [ 31.202453] do_syscall_64+0x3f/0x90 [ 31.202923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.203576] [ 31.203791] Freed by task 211: [ 31.204182] kasan_save_stack+0x22/0x50 [ 31.204684] kasan_set_track+0x25/0x30 [ 31.205191] kasan_save_free_info+0x2b/0x50 [ 31.205719] __kasan_slab_free+0x10a/0x190 [ 31.206249] kmem_cache_free+0x10d/0x4d0 [ 31.206756] rcu_core+0x8c8/0x2860 [ 31.207198] __do_softirq+0x1b7/0x7d4 [ 31.207752] [ 31.208005] Last potentially related work creation: [ 31.208591] kasan_save_stack+0x22/0x50 [ 31.209100] __kasan_record_aux_stack+0x8e/0xa0 [ 31.209679] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.210317] remove_vma+0x139/0x170 [ 31.210768] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.211319] do_vmi_munmap+0x1f1/0x2b0 [ 31.211802] __vm_munmap+0x138/0x3a0 [ 31.212268] __x64_sys_munmap+0x59/0x80 [ 31.212761] do_syscall_64+0x3f/0x90 [ 31.213243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.213885] [ 31.214102] The buggy address belongs to the object at ffff88800f811bc8 [ 31.214102] which belongs to the cache vm_area_struct of size 168 [ 31.215576] The buggy address is located 88 bytes inside of [ 31.215576] freed 168-byte region [ffff88800f811bc8, ffff88800f811c70) [ 31.216966] [ 31.217196] The buggy address belongs to the physical page: [ 31.217854] page:00000000deef593f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf811 [ 31.218996] memcg:ffff888019f07301 [ 31.219433] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.220111] page_type: 0xffffffff() [ 31.220574] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.221513] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f07301 [ 31.222433] page dumped because: kasan: bad access detected [ 31.223104] [ 31.223323] Memory state around the buggy address: [ 31.223908] ffff88800f811b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.224780] ffff88800f811b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.225666] >ffff88800f811c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.226531] ^ [ 31.227068] ffff88800f811c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.227931] ffff88800f811d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.228795] ================================================================== [ 31.229922] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.193658] BUG: Bad rss-counter state mm:0000000076e1432f type:MM_FILEPAGES val:33 [ 33.194630] BUG: Bad rss-counter state mm:0000000076e1432f type:MM_ANONPAGES val:22 [ 33.667543] BUG: Bad rss-counter state mm:000000002ca879d3 type:MM_FILEPAGES val:33 [ 33.668692] BUG: Bad rss-counter state mm:000000002ca879d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60467' (ECDSA) to the list of known hosts. 2023/06/20 16:16:35 fuzzer started 2023/06/20 16:16:35 dialing manager at localhost:36067 2023/06/20 16:16:35 checking machine... 2023/06/20 16:16:35 checking revisions... [ 34.397900] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:16:35 testing simple program... [ 34.440964] cgroup: Unknown subsys name 'net' [ 34.499762] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:16:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801473f678 RCX=0000000000000000 RDX=0000000000000002 RSI=ffffffff81fce879 RDI=ffff88801473f678 RBP=ffff88801473f680 RSP=ffff88801473f5b0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801473f668 R13=0000000000000002 R14=0000000000000000 R15=ffff88801473f678 RIP=ffffffff81fce894 RFL=00000212 [----A--] 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 00007fcefc76e900 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=00007fcefbbf0570 CR3=000000000c958000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=18474ff167b5450600000000000ae988 XMM05=2102fb4ad1673d950000000000132e68 XMM06=13e856d8d71426c80000000000131b98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11003079d69 RBX=ffff8880183ceb18 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880183ceb48 RBP=ffff88801ae70cb0 RSP=ffff888019eaf908 R8 =0000000000000001 R9 =ffffed10033d5f15 R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88801ae72210 R14=ffffffff81c63c8c R15=0000000000000000 RIP=ffffffff818464e8 RFL=00000046 [---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 00007f41f10a6700 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=00007f09e90220b0 CR3=000000000fdb4000 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=2034333a36313a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a36313a3631203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000