[ 55.735392] BUG: Bad rss-counter state mm:00000000dd06c21f type:MM_FILEPAGES val:33 [ 55.736356] BUG: Bad rss-counter state mm:00000000dd06c21f type:MM_ANONPAGES val:22 [ 55.849931] ================================================================== [ 55.850630] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.851339] Read of size 8 at addr ffff888018f45a50 by task sshd/226 [ 55.851923] [ 55.852091] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 55.852747] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.853491] Call Trace: [ 55.853763] [ 55.853980] dump_stack_lvl+0x91/0xf0 [ 55.854432] print_report+0xcc/0x620 [ 55.854814] ? __virt_addr_valid+0x102/0x340 [ 55.855238] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.855717] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.856184] kasan_report+0xbe/0xf0 [ 55.856551] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.857132] vma_interval_tree_remove+0xc75/0xec0 [ 55.857745] vma_prepare+0xc54/0x11a0 [ 55.858142] __split_vma+0x5af/0x950 [ 55.858428] ? __pfx___split_vma+0x10/0x10 [ 55.858767] ? find_held_lock+0x2c/0x110 [ 55.859083] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.859422] ? lock_is_held_type+0x9f/0x120 [ 55.859749] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.860124] ? mtree_range_walk+0x632/0x900 [ 55.860465] ? mas_walk+0x5c7/0x7c0 [ 55.860761] do_vmi_munmap+0x1f1/0x2b0 [ 55.861061] mmap_region+0x1f9/0x2660 [ 55.861353] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.861696] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.862239] ? __pfx_lock_acquire+0x10/0x10 [ 55.862641] ? __pfx_mmap_region+0x10/0x10 [ 55.863050] ? security_mmap_addr+0x7d/0xa0 [ 55.863466] ? get_unmapped_area+0x1f5/0x3f0 [ 55.863883] do_mmap+0x854/0xf00 [ 55.864220] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.864596] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.865018] ksys_mmap_pgoff+0x3af/0x500 [ 55.865400] do_syscall_64+0x3f/0x90 [ 55.865768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.866264] RIP: 0033:0x7f7d720e9d82 [ 55.866612] 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 [ 55.868269] RSP: 002b:00007ffd107b8878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.868973] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d720e9d82 [ 55.869649] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d71523000 [ 55.870310] RBP: 00007f7d71523000 R08: 0000000000000009 R09: 0000000000001000 [ 55.870950] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560aa1a35ec0 [ 55.871608] R13: 00007ffd107b8890 R14: 00007ffd107b88c0 R15: 00007ffd107b8c20 [ 55.872266] [ 55.872486] [ 55.872652] Allocated by task 219: [ 55.872977] kasan_save_stack+0x22/0x50 [ 55.873363] kasan_set_track+0x25/0x30 [ 55.873751] __kasan_slab_alloc+0x59/0x70 [ 55.874158] kmem_cache_alloc+0x16b/0x370 [ 55.874560] vm_area_dup+0x20/0x160 [ 55.874910] __split_vma+0x170/0x950 [ 55.875267] split_vma+0xc6/0x110 [ 55.875604] mprotect_fixup+0x8d2/0xb30 [ 55.875993] do_mprotect_pkey+0x87e/0xd40 [ 55.876392] __x64_sys_mprotect+0x78/0xc0 [ 55.876794] do_syscall_64+0x3f/0x90 [ 55.877154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.877660] [ 55.877833] Freed by task 13: [ 55.878126] kasan_save_stack+0x22/0x50 [ 55.878514] kasan_set_track+0x25/0x30 [ 55.878885] kasan_save_free_info+0x2b/0x50 [ 55.879297] __kasan_slab_free+0x10a/0x190 [ 55.879706] kmem_cache_free+0x10d/0x4d0 [ 55.880099] rcu_core+0x8c8/0x2860 [ 55.880441] __do_softirq+0x1b7/0x7d4 [ 55.880811] [ 55.880980] Last potentially related work creation: [ 55.881433] kasan_save_stack+0x22/0x50 [ 55.881843] __kasan_record_aux_stack+0x8e/0xa0 [ 55.882295] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.882788] remove_vma+0x139/0x170 [ 55.883140] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.883564] do_vmi_munmap+0x1f1/0x2b0 [ 55.883942] __vm_munmap+0x138/0x3a0 [ 55.884308] __x64_sys_munmap+0x59/0x80 [ 55.884699] do_syscall_64+0x3f/0x90 [ 55.885070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.885576] [ 55.885740] The buggy address belongs to the object at ffff888018f459f8 [ 55.885740] which belongs to the cache vm_area_struct of size 168 [ 55.886877] The buggy address is located 88 bytes inside of [ 55.886877] freed 168-byte region [ffff888018f459f8, ffff888018f45aa0) [ 55.887942] [ 55.888108] The buggy address belongs to the physical page: [ 55.888607] page:0000000080802e6d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f45 [ 55.889444] memcg:ffff888019c2ae01 [ 55.889790] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.890281] page_type: 0xffffffff() [ 55.890627] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 55.891333] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c2ae01 [ 55.892028] page dumped because: kasan: bad access detected [ 55.892530] [ 55.892693] Memory state around the buggy address: [ 55.893142] ffff888018f45900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.893763] ffff888018f45980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 55.894277] >ffff888018f45a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.894796] ^ [ 55.895198] ffff888018f45a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 55.895687] ffff888018f45b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.896182] ================================================================== [ 55.896777] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 57.956823] BUG: Bad rss-counter state mm:0000000054038b9e type:MM_FILEPAGES val:33 [ 57.957838] BUG: Bad rss-counter state mm:0000000054038b9e type:MM_ANONPAGES val:22 [ 58.450631] BUG: Bad rss-counter state mm:000000008f37edbc type:MM_FILEPAGES val:33 [ 58.451454] BUG: Bad rss-counter state mm:000000008f37edbc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7621' (ECDSA) to the list of known hosts. [ 58.670480] systemd-udevd (214) used greatest stack depth: 23992 bytes left 2023/06/20 17:50:05 fuzzer started 2023/06/20 17:50:05 dialing manager at localhost:36067 2023/06/20 17:50:05 checking machine... 2023/06/20 17:50:05 checking revisions... [ 59.157266] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:50:06 testing simple program... [ 59.203173] cgroup: Unknown subsys name 'net' [ 59.241638] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:50:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffc43d75528 CR3=0000000005482000 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=00007fb33e9e951000005621bead2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110031adefb RSP=ffff888018d6f7d8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800f8cb000 R13=ffff88800f8cb080 R14=ffffffff87f97640 R15=ffff888018d6f7f8 RIP=ffffffff8386af5b RFL=00000286 [--S--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 00007f141e291900 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=00007fff477b5000 CR3=000000000f094000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000