[ 23.789774] BUG: Bad rss-counter state mm:00000000466436ab type:MM_FILEPAGES val:33 [ 23.791110] BUG: Bad rss-counter state mm:00000000466436ab type:MM_ANONPAGES val:22 [ 23.961870] ================================================================== [ 23.962739] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.963669] Read of size 8 at addr ffff888018da7798 by task sshd/218 [ 23.964390] [ 23.964671] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.965491] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.966404] Call Trace: [ 23.966705] [ 23.966979] dump_stack_lvl+0x91/0xf0 [ 23.967477] print_report+0xcc/0x620 [ 23.967936] ? __virt_addr_valid+0x102/0x340 [ 23.968460] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.969038] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.969619] kasan_report+0xbe/0xf0 [ 23.970069] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.970656] vma_interval_tree_remove+0xc75/0xec0 [ 23.971279] vma_prepare+0xc54/0x11a0 [ 23.971754] __split_vma+0x5af/0x950 [ 23.972231] ? __pfx___split_vma+0x10/0x10 [ 23.972754] ? find_held_lock+0x2c/0x110 [ 23.973268] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.973839] ? lock_is_held_type+0x9f/0x120 [ 23.974379] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.974972] ? mtree_range_walk+0x632/0x900 [ 23.975538] ? mas_walk+0x5c7/0x7c0 [ 23.976009] do_vmi_munmap+0x1f1/0x2b0 [ 23.976498] mmap_region+0x1f9/0x2660 [ 23.976974] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.977493] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.978194] ? __pfx_lock_acquire+0x10/0x10 [ 23.978723] ? __pfx_mmap_region+0x10/0x10 [ 23.979297] ? security_mmap_addr+0x7d/0xa0 [ 23.979833] ? get_unmapped_area+0x1f5/0x3f0 [ 23.980384] do_mmap+0x854/0xf00 [ 23.980822] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.981309] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.981866] ksys_mmap_pgoff+0x3af/0x500 [ 23.982379] do_syscall_64+0x3f/0x90 [ 23.982845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.983524] RIP: 0033:0x7f8c40bf9d82 [ 23.983968] 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 [ 23.986103] RSP: 002b:00007ffede735668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.987017] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c40bf9d82 [ 23.987872] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c40033000 [ 23.988717] RBP: 00007f8c40033000 R08: 0000000000000009 R09: 0000000000001000 [ 23.989563] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ac834ef70 [ 23.990398] R13: 00007ffede735680 R14: 00007ffede7356b0 R15: 00007ffede735a10 [ 23.991279] [ 23.991576] [ 23.991788] Allocated by task 211: [ 23.992219] kasan_save_stack+0x22/0x50 [ 23.992725] kasan_set_track+0x25/0x30 [ 23.993210] __kasan_slab_alloc+0x59/0x70 [ 23.993719] kmem_cache_alloc+0x16b/0x370 [ 23.994241] vm_area_dup+0x20/0x160 [ 23.994697] __split_vma+0x170/0x950 [ 23.995195] split_vma+0xc6/0x110 [ 23.995638] mprotect_fixup+0x8d2/0xb30 [ 23.996142] do_mprotect_pkey+0x87e/0xd40 [ 23.996661] __x64_sys_mprotect+0x78/0xc0 [ 23.997176] do_syscall_64+0x3f/0x90 [ 23.997650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.998297] [ 23.998514] Freed by task 211: [ 23.998910] kasan_save_stack+0x22/0x50 [ 23.999458] kasan_set_track+0x25/0x30 [ 23.999957] kasan_save_free_info+0x2b/0x50 [ 24.000500] __kasan_slab_free+0x10a/0x190 [ 24.001018] kmem_cache_free+0x10d/0x4d0 [ 24.001524] rcu_core+0x8c8/0x2860 [ 24.001969] __do_softirq+0x1b7/0x7d4 [ 24.002452] [ 24.002667] Last potentially related work creation: [ 24.003296] kasan_save_stack+0x22/0x50 [ 24.003796] __kasan_record_aux_stack+0x8e/0xa0 [ 24.004371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.005007] remove_vma+0x139/0x170 [ 24.005459] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.006021] do_vmi_munmap+0x1f1/0x2b0 [ 24.006502] __vm_munmap+0x138/0x3a0 [ 24.006963] __x64_sys_munmap+0x59/0x80 [ 24.007500] do_syscall_64+0x3f/0x90 [ 24.007977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.008611] [ 24.008824] The buggy address belongs to the object at ffff888018da7740 [ 24.008824] which belongs to the cache vm_area_struct of size 168 [ 24.010297] The buggy address is located 88 bytes inside of [ 24.010297] freed 168-byte region [ffff888018da7740, ffff888018da77e8) [ 24.011724] [ 24.011939] The buggy address belongs to the physical page: [ 24.012607] page:0000000044b46221 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18da7 [ 24.013701] memcg:ffff888016962301 [ 24.014131] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.014780] page_type: 0xffffffff() [ 24.015270] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.016173] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016962301 [ 24.017079] page dumped because: kasan: bad access detected [ 24.017746] [ 24.017961] Memory state around the buggy address: [ 24.018549] ffff888018da7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.019450] ffff888018da7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.020311] >ffff888018da7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.021161] ^ [ 24.021652] ffff888018da7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.022510] ffff888018da7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.023392] ================================================================== [ 24.024387] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.424119] BUG: Bad rss-counter state mm:00000000765dc999 type:MM_FILEPAGES val:33 [ 26.425930] BUG: Bad rss-counter state mm:00000000765dc999 type:MM_ANONPAGES val:22 [ 26.995665] BUG: Bad rss-counter state mm:00000000170e10be type:MM_FILEPAGES val:33 [ 26.996843] BUG: Bad rss-counter state mm:00000000170e10be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33917' (ECDSA) to the list of known hosts. 2023/06/20 17:08:10 fuzzer started 2023/06/20 17:08:10 dialing manager at localhost:36067 2023/06/20 17:08:10 checking machine... 2023/06/20 17:08:10 checking revisions... [ 27.641019] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:08:11 testing simple program... [ 27.692401] cgroup: Unknown subsys name 'net' [ 27.749813] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:08:10 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000008 RCX=0000000000000000 RDX=ffff8880158c0000 RSI=ffffffff8217ba8b RDI=ffffffff85d3d350 RBP=ffff88801651fa28 RSP=ffff88801651f918 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=00007f632c000b80 R13=ffff88801651fa34 R14=ffff88801651fa30 R15=ffff88801651fa34 RIP=ffffffff814c086b RFL=00000293 [--S-A-C] 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 00007f633a782700 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=00007fd12c19dd08 CR3=000000000e998000 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=38303a3731203032206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34303633352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343036 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001ab4c85 RBX=ffff88800d5a63f8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d5a6428 RBP=ffff88800d1639f8 RSP=ffff888019eb78e8 R8 =0000000000000001 R9 =ffffed10033d6f11 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800d16e100 R14=ffffffff81803033 R15=0000000080120010 RIP=ffffffff818464e2 RFL=00000046 [---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 00007f2352ea9900 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=00007ffcca15c000 CR3=0000000019db8000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000