[ 25.039223] BUG: Bad rss-counter state mm:00000000a9f83141 type:MM_FILEPAGES val:33 [ 25.041375] BUG: Bad rss-counter state mm:00000000a9f83141 type:MM_ANONPAGES val:22 [ 25.198598] ================================================================== [ 25.199451] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.200347] Read of size 8 at addr ffff88800d904798 by task sshd/219 [ 25.201062] [ 25.201271] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.202258] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.203195] Call Trace: [ 25.203498] [ 25.203770] dump_stack_lvl+0x91/0xf0 [ 25.204230] print_report+0xcc/0x620 [ 25.204711] ? __virt_addr_valid+0x102/0x340 [ 25.205233] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.205826] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.206410] kasan_report+0xbe/0xf0 [ 25.206857] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.207444] vma_interval_tree_remove+0xc75/0xec0 [ 25.208017] vma_prepare+0xc54/0x11a0 [ 25.208471] __split_vma+0x5af/0x950 [ 25.208916] ? __pfx___split_vma+0x10/0x10 [ 25.209423] ? find_held_lock+0x2c/0x110 [ 25.209942] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.210491] ? lock_is_held_type+0x9f/0x120 [ 25.211016] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.211614] ? mtree_range_walk+0x632/0x900 [ 25.212153] ? mas_walk+0x5c7/0x7c0 [ 25.212619] do_vmi_munmap+0x1f1/0x2b0 [ 25.213106] mmap_region+0x1f9/0x2660 [ 25.213594] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.214096] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.214804] ? __pfx_lock_acquire+0x10/0x10 [ 25.215324] ? __pfx_mmap_region+0x10/0x10 [ 25.215845] ? security_mmap_addr+0x7d/0xa0 [ 25.216360] ? get_unmapped_area+0x1f5/0x3f0 [ 25.216901] do_mmap+0x854/0xf00 [ 25.217325] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.217816] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.218363] ksys_mmap_pgoff+0x3af/0x500 [ 25.218871] do_syscall_64+0x3f/0x90 [ 25.219333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.219951] RIP: 0033:0x7fae23733d82 [ 25.220385] 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 [ 25.222399] RSP: 002b:00007ffde7f0d8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.223287] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae23733d82 [ 25.224133] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae22b6d000 [ 25.224977] RBP: 00007fae22b6d000 R08: 0000000000000009 R09: 0000000000001000 [ 25.225815] R10: 0000000000000812 R11: 0000000000000206 R12: 00005568d3e94ec0 [ 25.226647] R13: 00007ffde7f0d8d0 R14: 00007ffde7f0d900 R15: 00007ffde7f0dc60 [ 25.227494] [ 25.227781] [ 25.227996] Allocated by task 212: [ 25.228418] kasan_save_stack+0x22/0x50 [ 25.228922] kasan_set_track+0x25/0x30 [ 25.229401] __kasan_slab_alloc+0x59/0x70 [ 25.229923] kmem_cache_alloc+0x16b/0x370 [ 25.230432] vm_area_dup+0x20/0x160 [ 25.230885] __split_vma+0x170/0x950 [ 25.231339] split_vma+0xc6/0x110 [ 25.231775] mprotect_fixup+0x8d2/0xb30 [ 25.232257] do_mprotect_pkey+0x87e/0xd40 [ 25.232771] __x64_sys_mprotect+0x78/0xc0 [ 25.233283] do_syscall_64+0x3f/0x90 [ 25.233762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.234385] [ 25.234599] Freed by task 212: [ 25.234987] kasan_save_stack+0x22/0x50 [ 25.235490] kasan_set_track+0x25/0x30 [ 25.235972] kasan_save_free_info+0x2b/0x50 [ 25.236493] __kasan_slab_free+0x10a/0x190 [ 25.237022] kmem_cache_free+0x10d/0x4d0 [ 25.237537] rcu_core+0x8c8/0x2860 [ 25.237979] __do_softirq+0x1b7/0x7d4 [ 25.238439] [ 25.238650] Last potentially related work creation: [ 25.239284] kasan_save_stack+0x22/0x50 [ 25.239787] __kasan_record_aux_stack+0x8e/0xa0 [ 25.240344] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.240984] remove_vma+0x139/0x170 [ 25.241422] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.241990] do_vmi_munmap+0x1f1/0x2b0 [ 25.242469] __vm_munmap+0x138/0x3a0 [ 25.242935] __x64_sys_munmap+0x59/0x80 [ 25.243482] do_syscall_64+0x3f/0x90 [ 25.243951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.244570] [ 25.244781] The buggy address belongs to the object at ffff88800d904740 [ 25.244781] which belongs to the cache vm_area_struct of size 168 [ 25.246229] The buggy address is located 88 bytes inside of [ 25.246229] freed 168-byte region [ffff88800d904740, ffff88800d9047e8) [ 25.247625] [ 25.247845] The buggy address belongs to the physical page: [ 25.248494] page:000000002e3fc3ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd904 [ 25.249566] memcg:ffff88800dc17601 [ 25.249979] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.250664] page_type: 0xffffffff() [ 25.251114] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 25.252026] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc17601 [ 25.252931] page dumped because: kasan: bad access detected [ 25.253592] [ 25.253804] Memory state around the buggy address: [ 25.254366] ffff88800d904680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.255206] ffff88800d904700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 25.256055] >ffff88800d904780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 25.256900] ^ [ 25.257383] ffff88800d904800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 25.258231] ffff88800d904880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 25.259066] ================================================================== [ 25.259972] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.265852] BUG: Bad rss-counter state mm:0000000001bbfd87 type:MM_FILEPAGES val:33 [ 27.266839] BUG: Bad rss-counter state mm:0000000001bbfd87 type:MM_ANONPAGES val:22 [ 27.755864] BUG: Bad rss-counter state mm:000000006e2d3fc8 type:MM_FILEPAGES val:33 [ 27.757106] BUG: Bad rss-counter state mm:000000006e2d3fc8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46756' (ECDSA) to the list of known hosts. 2023/06/19 21:38:10 fuzzer started 2023/06/19 21:38:11 dialing manager at localhost:44161 2023/06/19 21:38:11 checking machine... 2023/06/19 21:38:11 checking revisions... [ 28.492406] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:38:11 testing simple program... [ 28.549174] cgroup: Unknown subsys name 'net' [ 28.585093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:38:09 Registers: info registers vcpu 0 RAX=ffffffff81ef1438 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002da8f47 RSI=ffffffff81ef1438 RDI=ffff888016d47aa8 RBP=ffff888016d47a78 RSP=ffff888016d479d8 R8 =0000000000000001 R9 =ffff888016d47a20 R10=0000000000038001 R11=0000000000020c48 R12=ffff888016d47aa8 R13=0000000000000000 R14=ffff8880147f9b40 R15=ffff888019bccd10 RIP=ffffffff813ad424 RFL=00000282 [--S----] 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 00007febec979900 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=00007ffc92b9c000 CR3=00000000158c8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fcfd933f050 CR3=0000000013a76000 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=00000000000000000000000000000000 XMM01=cf449d813bd0129b3441b663023bf626 XMM02=000000000011fdc8eff9b2d0a8fce9cb XMM03=000000000011fe982c67c8bc2e329bc3 XMM04=360a36733b00b7ac00000000000ae988 XMM05=dfcdbad4f1609c370000000000133370 XMM06=d55af420a16af9da0000000000132548 XMM07=e042d86d42eb936e0000000000123d80 XMM08=b1a1eb5f833cc207000000000011fe98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000