[ 24.185032] BUG: Bad rss-counter state mm:00000000ba8c9004 type:MM_FILEPAGES val:33 [ 24.186258] BUG: Bad rss-counter state mm:00000000ba8c9004 type:MM_ANONPAGES val:22 [ 24.224289] ================================================================== [ 24.225127] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.226231] Read of size 8 at addr ffff88800e263228 by task sshd/220 [ 24.226944] [ 24.227152] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.227957] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.228870] Call Trace: [ 24.229171] [ 24.229439] dump_stack_lvl+0x91/0xf0 [ 24.229932] print_report+0xcc/0x620 [ 24.230387] ? __virt_addr_valid+0x102/0x340 [ 24.230905] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.231487] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.232066] kasan_report+0xbe/0xf0 [ 24.232519] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.233100] vma_interval_tree_remove+0xc75/0xec0 [ 24.233675] vma_prepare+0xc54/0x11a0 [ 24.234126] __split_vma+0x5af/0x950 [ 24.234574] ? __pfx___split_vma+0x10/0x10 [ 24.235105] ? find_held_lock+0x2c/0x110 [ 24.235635] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.236189] ? lock_is_held_type+0x9f/0x120 [ 24.236728] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.237324] ? mtree_range_walk+0x632/0x900 [ 24.237884] ? mas_walk+0x5c7/0x7c0 [ 24.238354] do_vmi_munmap+0x1f1/0x2b0 [ 24.238848] mmap_region+0x1f9/0x2660 [ 24.239333] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.239840] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.240542] ? __pfx_lock_acquire+0x10/0x10 [ 24.241076] ? __pfx_mmap_region+0x10/0x10 [ 24.241607] ? security_mmap_addr+0x7d/0xa0 [ 24.242160] ? get_unmapped_area+0x1f5/0x3f0 [ 24.242702] do_mmap+0x854/0xf00 [ 24.243140] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.243638] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.244194] ksys_mmap_pgoff+0x3af/0x500 [ 24.244693] do_syscall_64+0x3f/0x90 [ 24.245175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.245825] RIP: 0033:0x7f1a937bcd82 [ 24.246285] 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 [ 24.248426] RSP: 002b:00007ffd27b404d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.249326] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a937bcd82 [ 24.250182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a92bf6000 [ 24.251021] RBP: 00007f1a92bf6000 R08: 0000000000000009 R09: 0000000000001000 [ 24.251860] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a450319ec0 [ 24.252696] R13: 00007ffd27b404f0 R14: 00007ffd27b40520 R15: 00007ffd27b40880 [ 24.253551] [ 24.253861] [ 24.254073] Allocated by task 212: [ 24.254500] kasan_save_stack+0x22/0x50 [ 24.255005] kasan_set_track+0x25/0x30 [ 24.255494] __kasan_slab_alloc+0x59/0x70 [ 24.256023] kmem_cache_alloc+0x16b/0x370 [ 24.256535] vm_area_dup+0x20/0x160 [ 24.256991] __split_vma+0x170/0x950 [ 24.257456] split_vma+0xc6/0x110 [ 24.257913] mprotect_fixup+0x8d2/0xb30 [ 24.258399] do_mprotect_pkey+0x87e/0xd40 [ 24.258925] __x64_sys_mprotect+0x78/0xc0 [ 24.259434] do_syscall_64+0x3f/0x90 [ 24.259913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.260552] [ 24.260762] Freed by task 212: [ 24.261149] kasan_save_stack+0x22/0x50 [ 24.261661] kasan_set_track+0x25/0x30 [ 24.262157] kasan_save_free_info+0x2b/0x50 [ 24.262680] __kasan_slab_free+0x10a/0x190 [ 24.263213] kmem_cache_free+0x10d/0x4d0 [ 24.263713] rcu_core+0x8c8/0x2860 [ 24.264168] __do_softirq+0x1b7/0x7d4 [ 24.264642] [ 24.264853] Last potentially related work creation: [ 24.265443] kasan_save_stack+0x22/0x50 [ 24.265963] __kasan_record_aux_stack+0x8e/0xa0 [ 24.266531] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.267176] remove_vma+0x139/0x170 [ 24.267620] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.268175] do_vmi_munmap+0x1f1/0x2b0 [ 24.268654] __vm_munmap+0x138/0x3a0 [ 24.269131] __x64_sys_munmap+0x59/0x80 [ 24.269640] do_syscall_64+0x3f/0x90 [ 24.270119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.270769] [ 24.270982] Second to last potentially related work creation: [ 24.271668] kasan_save_stack+0x22/0x50 [ 24.272164] __kasan_record_aux_stack+0x8e/0xa0 [ 24.272727] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.273351] remove_vma+0x139/0x170 [ 24.273803] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.274359] do_vmi_munmap+0x1f1/0x2b0 [ 24.274851] mmap_region+0x1f9/0x2660 [ 24.275326] do_mmap+0x854/0xf00 [ 24.275754] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.276243] ksys_mmap_pgoff+0x3af/0x500 [ 24.276754] do_syscall_64+0x3f/0x90 [ 24.277223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.277870] [ 24.278082] The buggy address belongs to the object at ffff88800e2631d0 [ 24.278082] which belongs to the cache vm_area_struct of size 168 [ 24.279550] The buggy address is located 88 bytes inside of [ 24.279550] freed 168-byte region [ffff88800e2631d0, ffff88800e263278) [ 24.280959] [ 24.281166] The buggy address belongs to the physical page: [ 24.281832] page:00000000f9048590 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe263 [ 24.282917] memcg:ffff88800e388001 [ 24.283341] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.284037] page_type: 0xffffffff() [ 24.284491] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bd6c0 dead000000000009 [ 24.285407] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e388001 [ 24.286321] page dumped because: kasan: bad access detected [ 24.286983] [ 24.287189] Memory state around the buggy address: [ 24.287765] ffff88800e263100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.288620] ffff88800e263180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.289471] >ffff88800e263200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.290329] ^ [ 24.290881] ffff88800e263280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.291736] ffff88800e263300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.292587] ================================================================== [ 24.293739] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.243683] BUG: Bad rss-counter state mm:000000006ac08cc1 type:MM_FILEPAGES val:33 [ 26.244916] BUG: Bad rss-counter state mm:000000006ac08cc1 type:MM_ANONPAGES val:22 [ 26.845581] BUG: Bad rss-counter state mm:0000000065dd5d98 type:MM_FILEPAGES val:33 [ 26.846862] BUG: Bad rss-counter state mm:0000000065dd5d98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6084' (ECDSA) to the list of known hosts. 2023/06/20 15:35:43 fuzzer started 2023/06/20 15:35:43 dialing manager at localhost:36067 2023/06/20 15:35:43 checking machine... 2023/06/20 15:35:43 checking revisions... [ 27.512874] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:35:43 testing simple program... [ 27.608702] cgroup: Unknown subsys name 'net' [ 27.712361] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:35:43 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=dffffc0000000000 RCX=ffffffff815a7325 RDX=0000000000000000 RSI=0000000000000102 RDI=0000000000000101 RBP=ffff8880146ffd28 RSP=ffff8880146ffc58 R8 =0000000000000006 R9 =0000000000000101 R10=0000000000000085 R11=0000000000000000 R12=0000000000000102 R13=ffff8880146ffd60 R14=0000000000000101 R15=ffffc9000064e110 RIP=ffffffff814c0378 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 00007f7141096900 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=00007f71404d4de0 CR3=000000000d6de000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2b8e7cf727e4f74500000000000ae988 XMM05=a80cbd17618e45f100000000001339f0 XMM06=4fda316b135da52b0000000000132470 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f1f8001 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=ffff88800f1f7301 RSI=ffff88800f1f7370 RDI=ffff88806cf09aa8 RBP=ffff88800f1f7370 RSP=ffff88806cf099f0 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff88800f1f0000 R14=ffff88800f1f7370 R15=ffff88806cf09a98 RIP=ffffffff8113048d RFL=00000297 [--S-APC] 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 00007f588a972900 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=00007f588af29618 CR3=000000001bbd6000 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=2032343a35333a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a35333a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000