[ 24.563549] BUG: Bad rss-counter state mm:00000000f90618f1 type:MM_FILEPAGES val:33 [ 24.564558] BUG: Bad rss-counter state mm:00000000f90618f1 type:MM_ANONPAGES val:22 [ 24.741785] ================================================================== [ 24.742699] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.743640] Read of size 8 at addr ffff8880164fc5c8 by task sshd/218 [ 24.744416] [ 24.744636] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.745655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.746646] Call Trace: [ 24.746967] [ 24.747254] dump_stack_lvl+0x91/0xf0 [ 24.747770] print_report+0xcc/0x620 [ 24.748263] ? __virt_addr_valid+0x102/0x340 [ 24.748847] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.749468] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.750091] kasan_report+0xbe/0xf0 [ 24.750572] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.751198] vma_interval_tree_remove+0xc75/0xec0 [ 24.751806] vma_prepare+0xc54/0x11a0 [ 24.752287] __split_vma+0x5af/0x950 [ 24.752771] ? __pfx___split_vma+0x10/0x10 [ 24.753303] ? find_held_lock+0x2c/0x110 [ 24.753826] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.754396] ? lock_is_held_type+0x9f/0x120 [ 24.754931] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.755540] ? mtree_range_walk+0x632/0x900 [ 24.756090] ? mas_walk+0x5c7/0x7c0 [ 24.756565] do_vmi_munmap+0x1f1/0x2b0 [ 24.757072] mmap_region+0x1f9/0x2660 [ 24.757555] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.758069] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.758781] ? __pfx_lock_acquire+0x10/0x10 [ 24.759316] ? __pfx_mmap_region+0x10/0x10 [ 24.759849] ? security_mmap_addr+0x7d/0xa0 [ 24.760380] ? get_unmapped_area+0x1f5/0x3f0 [ 24.760955] do_mmap+0x854/0xf00 [ 24.761396] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.761898] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.762464] ksys_mmap_pgoff+0x3af/0x500 [ 24.762974] do_syscall_64+0x3f/0x90 [ 24.763454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.764112] RIP: 0033:0x7fb3bde23d82 [ 24.764568] 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 [ 24.766713] RSP: 002b:00007ffdaaa58a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.767633] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb3bde23d82 [ 24.768497] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb3bd25d000 [ 24.769363] RBP: 00007fb3bd25d000 R08: 0000000000000009 R09: 0000000000001000 [ 24.770226] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e0bf7dec0 [ 24.771080] R13: 00007ffdaaa58a90 R14: 00007ffdaaa58ac0 R15: 00007ffdaaa58e20 [ 24.771943] [ 24.772234] [ 24.772456] Allocated by task 211: [ 24.772904] kasan_save_stack+0x22/0x50 [ 24.773413] kasan_set_track+0x25/0x30 [ 24.773910] __kasan_slab_alloc+0x59/0x70 [ 24.774436] kmem_cache_alloc+0x16b/0x370 [ 24.774952] vm_area_dup+0x20/0x160 [ 24.775410] __split_vma+0x170/0x950 [ 24.775875] split_vma+0xc6/0x110 [ 24.776314] mprotect_fixup+0x8d2/0xb30 [ 24.776827] do_mprotect_pkey+0x87e/0xd40 [ 24.777365] __x64_sys_mprotect+0x78/0xc0 [ 24.777892] do_syscall_64+0x3f/0x90 [ 24.778369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.779021] [ 24.779236] Freed by task 211: [ 24.779635] kasan_save_stack+0x22/0x50 [ 24.780140] kasan_set_track+0x25/0x30 [ 24.780634] kasan_save_free_info+0x2b/0x50 [ 24.781182] __kasan_slab_free+0x10a/0x190 [ 24.781718] kmem_cache_free+0x10d/0x4d0 [ 24.782227] rcu_core+0x8c8/0x2860 [ 24.782671] __do_softirq+0x1b7/0x7d4 [ 24.783150] [ 24.783364] Last potentially related work creation: [ 24.783965] kasan_save_stack+0x22/0x50 [ 24.784475] __kasan_record_aux_stack+0x8e/0xa0 [ 24.785055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.785697] remove_vma+0x139/0x170 [ 24.786149] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.786767] do_vmi_munmap+0x1f1/0x2b0 [ 24.787254] __vm_munmap+0x138/0x3a0 [ 24.787726] __x64_sys_munmap+0x59/0x80 [ 24.788230] do_syscall_64+0x3f/0x90 [ 24.788703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.789372] [ 24.789586] The buggy address belongs to the object at ffff8880164fc570 [ 24.789586] which belongs to the cache vm_area_struct of size 168 [ 24.791064] The buggy address is located 88 bytes inside of [ 24.791064] freed 168-byte region [ffff8880164fc570, ffff8880164fc618) [ 24.792478] [ 24.792692] The buggy address belongs to the physical page: [ 24.793357] page:00000000a6c9c33d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164fc [ 24.794449] memcg:ffff88800ec04501 [ 24.794873] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.795578] page_type: 0xffffffff() [ 24.796033] raw: 0100000000000200 ffff88800879fc80 ffffea000060dec0 dead000000000007 [ 24.796970] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec04501 [ 24.797885] page dumped because: kasan: bad access detected [ 24.798553] [ 24.798773] Memory state around the buggy address: [ 24.799363] ffff8880164fc480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.800224] ffff8880164fc500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.801099] >ffff8880164fc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.801960] ^ [ 24.802627] ffff8880164fc600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.803488] ffff8880164fc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.804338] ================================================================== [ 24.805364] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.425853] BUG: Bad rss-counter state mm:000000007677e5f8 type:MM_FILEPAGES val:33 [ 26.426611] BUG: Bad rss-counter state mm:000000007677e5f8 type:MM_ANONPAGES val:22 [ 26.840033] BUG: Bad rss-counter state mm:000000005e7da741 type:MM_FILEPAGES val:33 [ 26.840755] BUG: Bad rss-counter state mm:000000005e7da741 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19499' (ECDSA) to the list of known hosts. 2023/06/19 16:39:41 fuzzer started 2023/06/19 16:39:42 dialing manager at localhost:44161 2023/06/19 16:39:42 checking machine... 2023/06/19 16:39:42 checking revisions... [ 27.494266] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:39:42 testing simple program... [ 27.542428] cgroup: Unknown subsys name 'net' [ 27.577064] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:39:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888019ff79c0 RCX=0000000000000001 RDX=1ffff110033fef43 RSI=ffff888019ff7e28 RDI=ffff888019ff79c0 RBP=ffff888019ff7a18 RSP=ffff888019ff79a8 R8 =0000000000000001 R9 =ffff888019ff7a00 R10=0000000000038001 R11=0000000000022999 R12=ffff888019ff7a88 R13=0000000000000000 R14=ffff888016159b40 R15=ffff88800f2a8e00 RIP=ffffffff8113038e 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 00007f1e12395900 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=00007ffdb3a7d000 CR3=000000000fbda000 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=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 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=ffff888008c58400 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=00007f1e1294d0b0 CR3=00000000145a8000 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=2031343a39333a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a39333a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000