[ 24.176310] BUG: Bad rss-counter state mm:000000000f63d73f type:MM_FILEPAGES val:33 [ 24.177497] BUG: Bad rss-counter state mm:000000000f63d73f type:MM_ANONPAGES val:22 [ 24.207701] ================================================================== [ 24.208826] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.209955] Read of size 8 at addr ffff88800d981968 by task sshd/220 [ 24.210940] [ 24.211195] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.212162] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.213264] Call Trace: [ 24.213632] [ 24.213952] dump_stack_lvl+0x91/0xf0 [ 24.214508] print_report+0xcc/0x620 [ 24.215082] ? __virt_addr_valid+0x102/0x340 [ 24.215477] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.215810] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.216144] kasan_report+0xbe/0xf0 [ 24.216403] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.216740] vma_interval_tree_remove+0xc75/0xec0 [ 24.217066] vma_prepare+0xc54/0x11a0 [ 24.217328] __split_vma+0x5af/0x950 [ 24.217586] ? __pfx___split_vma+0x10/0x10 [ 24.217873] ? find_held_lock+0x2c/0x110 [ 24.218159] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.218465] ? lock_is_held_type+0x9f/0x120 [ 24.218758] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.219093] ? mtree_range_walk+0x632/0x900 [ 24.219399] ? mas_walk+0x5c7/0x7c0 [ 24.219658] do_vmi_munmap+0x1f1/0x2b0 [ 24.219926] mmap_region+0x1f9/0x2660 [ 24.220189] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.220469] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.220857] ? __pfx_lock_acquire+0x10/0x10 [ 24.221147] ? __pfx_mmap_region+0x10/0x10 [ 24.221435] ? security_mmap_addr+0x7d/0xa0 [ 24.221726] ? get_unmapped_area+0x1f5/0x3f0 [ 24.222024] do_mmap+0x854/0xf00 [ 24.222263] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.222533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.222839] ksys_mmap_pgoff+0x3af/0x500 [ 24.223121] do_syscall_64+0x3f/0x90 [ 24.223383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.223735] RIP: 0033:0x7fa9c4833d82 [ 24.223984] 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 [ 24.225123] RSP: 002b:00007fffe5e272e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.225613] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa9c4833d82 [ 24.226069] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa9c3c6d000 [ 24.226526] RBP: 00007fa9c3c6d000 R08: 0000000000000009 R09: 0000000000001000 [ 24.226994] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8cf364d90 [ 24.227451] R13: 00007fffe5e27300 R14: 00007fffe5e27330 R15: 00007fffe5e27690 [ 24.227913] [ 24.228072] [ 24.228190] Allocated by task 213: [ 24.228423] kasan_save_stack+0x22/0x50 [ 24.228699] kasan_set_track+0x25/0x30 [ 24.228968] __kasan_slab_alloc+0x59/0x70 [ 24.229252] kmem_cache_alloc+0x16b/0x370 [ 24.229533] vm_area_dup+0x20/0x160 [ 24.229781] __split_vma+0x170/0x950 [ 24.230034] split_vma+0xc6/0x110 [ 24.230273] mprotect_fixup+0x8d2/0xb30 [ 24.230548] do_mprotect_pkey+0x87e/0xd40 [ 24.230831] __x64_sys_mprotect+0x78/0xc0 [ 24.231118] do_syscall_64+0x3f/0x90 [ 24.231376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.231724] [ 24.231843] Freed by task 19: [ 24.232051] kasan_save_stack+0x22/0x50 [ 24.232330] kasan_set_track+0x25/0x30 [ 24.232600] kasan_save_free_info+0x2b/0x50 [ 24.232889] __kasan_slab_free+0x10a/0x190 [ 24.233179] kmem_cache_free+0x10d/0x4d0 [ 24.233455] rcu_core+0x8c8/0x2860 [ 24.233698] __do_softirq+0x1b7/0x7d4 [ 24.233958] [ 24.234077] Last potentially related work creation: [ 24.234392] kasan_save_stack+0x22/0x50 [ 24.234667] __kasan_record_aux_stack+0x8e/0xa0 [ 24.234988] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.235338] remove_vma+0x139/0x170 [ 24.235584] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.235885] do_vmi_munmap+0x1f1/0x2b0 [ 24.236149] __vm_munmap+0x138/0x3a0 [ 24.236403] __x64_sys_munmap+0x59/0x80 [ 24.236673] do_syscall_64+0x3f/0x90 [ 24.236931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.237278] [ 24.237396] The buggy address belongs to the object at ffff88800d981910 [ 24.237396] which belongs to the cache vm_area_struct of size 168 [ 24.238185] The buggy address is located 88 bytes inside of [ 24.238185] freed 168-byte region [ffff88800d981910, ffff88800d9819b8) [ 24.238951] [ 24.239070] The buggy address belongs to the physical page: [ 24.239426] page:000000007be1001e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd981 [ 24.240009] memcg:ffff88800f6ee101 [ 24.240241] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.240591] page_type: 0xffffffff() [ 24.240837] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.241331] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6ee101 [ 24.241819] page dumped because: kasan: bad access detected [ 24.242175] [ 24.242293] Memory state around the buggy address: [ 24.242613] ffff88800d981800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.243084] ffff88800d981880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.243546] >ffff88800d981900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.244000] ^ [ 24.244416] ffff88800d981980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.244874] ffff88800d981a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.245327] ================================================================== [ 24.245881] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.353215] BUG: Bad rss-counter state mm:000000000fc8005a type:MM_FILEPAGES val:33 [ 26.354759] BUG: Bad rss-counter state mm:000000000fc8005a type:MM_ANONPAGES val:22 [ 26.827490] BUG: Bad rss-counter state mm:00000000ccb71e79 type:MM_FILEPAGES val:33 [ 26.828451] BUG: Bad rss-counter state mm:00000000ccb71e79 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8584' (ECDSA) to the list of known hosts. 2023/06/19 20:25:01 fuzzer started 2023/06/19 20:25:01 dialing manager at localhost:44161 2023/06/19 20:25:01 checking machine... 2023/06/19 20:25:01 checking revisions... [ 27.542230] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:25:01 testing simple program... [ 27.591931] cgroup: Unknown subsys name 'net' [ 27.639301] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:25:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fc41abc1e30 CR3=000000000dc7a000 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=2031303a35323a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a35323a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8613753e RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800f12f600 RSP=ffff88800f12f538 R8 =ffffffff86137542 R9 =ffff88800f12f5e8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800f12f608 R13=ffff88800f12f5f0 R14=ffff88800f12f908 R15=ffff88800f12f5a8 RIP=ffffffff81131151 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 00007ff4a5ae2900 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=00007ff4a6099618 CR3=000000000cbe8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000