[ 23.895527] BUG: Bad rss-counter state mm:000000007ba498a2 type:MM_FILEPAGES val:33 [ 23.896417] BUG: Bad rss-counter state mm:000000007ba498a2 type:MM_ANONPAGES val:22 [ 24.032419] ================================================================== [ 24.033341] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.034270] Read of size 8 at addr ffff88801ab2f3f8 by task sshd/219 [ 24.035210] [ 24.035437] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.036296] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.037296] Call Trace: [ 24.037613] [ 24.037905] dump_stack_lvl+0x91/0xf0 [ 24.038395] print_report+0xcc/0x620 [ 24.038887] ? __virt_addr_valid+0x102/0x340 [ 24.039459] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.040069] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.040680] kasan_report+0xbe/0xf0 [ 24.041159] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.041777] vma_interval_tree_remove+0xc75/0xec0 [ 24.042374] vma_prepare+0xc54/0x11a0 [ 24.042847] __split_vma+0x5af/0x950 [ 24.043324] ? __pfx___split_vma+0x10/0x10 [ 24.043849] ? find_held_lock+0x2c/0x110 [ 24.044366] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.044923] ? lock_is_held_type+0x9f/0x120 [ 24.045454] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.046053] ? mtree_range_walk+0x632/0x900 [ 24.046607] ? mas_walk+0x5c7/0x7c0 [ 24.047087] do_vmi_munmap+0x1f1/0x2b0 [ 24.047580] mmap_region+0x1f9/0x2660 [ 24.048057] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.048565] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.049271] ? __pfx_lock_acquire+0x10/0x10 [ 24.049801] ? __pfx_mmap_region+0x10/0x10 [ 24.050331] ? security_mmap_addr+0x7d/0xa0 [ 24.050860] ? get_unmapped_area+0x1f5/0x3f0 [ 24.051432] do_mmap+0x854/0xf00 [ 24.051874] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.052361] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.052917] ksys_mmap_pgoff+0x3af/0x500 [ 24.053417] do_syscall_64+0x3f/0x90 [ 24.053896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.054534] RIP: 0033:0x7f8de660ad82 [ 24.054998] 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 [ 24.057106] RSP: 002b:00007ffcc57555a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.058002] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8de660ad82 [ 24.058854] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8de5a44000 [ 24.059713] RBP: 00007f8de5a44000 R08: 0000000000000009 R09: 0000000000001000 [ 24.060550] R10: 0000000000000812 R11: 0000000000000206 R12: 000056068934df70 [ 24.061391] R13: 00007ffcc57555c0 R14: 00007ffcc57555f0 R15: 00007ffcc5755950 [ 24.062238] [ 24.062527] [ 24.062745] Allocated by task 207: [ 24.063183] kasan_save_stack+0x22/0x50 [ 24.063686] kasan_set_track+0x25/0x30 [ 24.064178] __kasan_slab_alloc+0x59/0x70 [ 24.064698] kmem_cache_alloc+0x16b/0x370 [ 24.065216] vm_area_dup+0x20/0x160 [ 24.065667] __split_vma+0x170/0x950 [ 24.066131] split_vma+0xc6/0x110 [ 24.066570] mprotect_fixup+0x8d2/0xb30 [ 24.067097] do_mprotect_pkey+0x87e/0xd40 [ 24.067615] __x64_sys_mprotect+0x78/0xc0 [ 24.068133] do_syscall_64+0x3f/0x90 [ 24.068613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.069256] [ 24.069469] Freed by task 13: [ 24.069849] kasan_save_stack+0x22/0x50 [ 24.070349] kasan_set_track+0x25/0x30 [ 24.070856] kasan_save_free_info+0x2b/0x50 [ 24.071412] __kasan_slab_free+0x10a/0x190 [ 24.071943] kmem_cache_free+0x10d/0x4d0 [ 24.072449] rcu_core+0x8c8/0x2860 [ 24.072892] __do_softirq+0x1b7/0x7d4 [ 24.073366] [ 24.073581] Last potentially related work creation: [ 24.074165] kasan_save_stack+0x22/0x50 [ 24.074669] __kasan_record_aux_stack+0x8e/0xa0 [ 24.075305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.075973] remove_vma+0x139/0x170 [ 24.076437] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.076996] do_vmi_munmap+0x1f1/0x2b0 [ 24.077478] __vm_munmap+0x138/0x3a0 [ 24.077942] __x64_sys_munmap+0x59/0x80 [ 24.078440] do_syscall_64+0x3f/0x90 [ 24.078913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.079567] [ 24.079785] The buggy address belongs to the object at ffff88801ab2f3a0 [ 24.079785] which belongs to the cache vm_area_struct of size 168 [ 24.081260] The buggy address is located 88 bytes inside of [ 24.081260] freed 168-byte region [ffff88801ab2f3a0, ffff88801ab2f448) [ 24.082656] [ 24.082871] The buggy address belongs to the physical page: [ 24.083586] page:00000000167d5438 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ab2f [ 24.084743] memcg:ffff88801ab12701 [ 24.085271] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.085922] page_type: 0xffffffff() [ 24.086375] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.087318] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801ab12701 [ 24.088214] page dumped because: kasan: bad access detected [ 24.088873] [ 24.089089] Memory state around the buggy address: [ 24.089660] ffff88801ab2f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.090512] ffff88801ab2f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.091380] >ffff88801ab2f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.092323] ^ [ 24.093273] ffff88801ab2f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.094243] ffff88801ab2f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.095212] ================================================================== [ 24.096279] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.271860] BUG: Bad rss-counter state mm:0000000094c59e13 type:MM_FILEPAGES val:33 [ 26.273037] BUG: Bad rss-counter state mm:0000000094c59e13 type:MM_ANONPAGES val:22 [ 26.680701] BUG: Bad rss-counter state mm:00000000ebf83b4c type:MM_FILEPAGES val:33 [ 26.681946] BUG: Bad rss-counter state mm:00000000ebf83b4c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15573' (ECDSA) to the list of known hosts. 2023/06/20 12:03:03 fuzzer started 2023/06/20 12:03:03 dialing manager at localhost:36067 2023/06/20 12:03:04 checking machine... 2023/06/20 12:03:04 checking revisions... [ 27.420533] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:03:04 testing simple program... [ 27.465109] cgroup: Unknown subsys name 'net' [ 27.524458] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:03:03 Registers: info registers vcpu 0 RAX=0000000000001fa0 RBX=0000000000000001 RCX=00007fcbdc8ff3ff RDX=000055f20e8be788 RSI=0000000000000001 RDI=000055f20f7501c0 RBP=000055f20f7501c0 RSP=00007fcbdc4776f8 R8 =0000000000000000 R9 =000055f20f750e88 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007fcbcc000b80 R14=000055f20e8bea50 R15=00007fcbdc54e840 RIP=000055f20e843806 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcbdc47b700 00000000 00000000 GS =0000 0000000000000000 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=00007fd1295630b0 CR3=000000000fd32000 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=33303a3231203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732033303a3330 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323638 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=0000000000006097 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000006098 RSI=000000000000132f RDI=00000000000121c5 RBP=ffff888014767a08 RSP=ffff8880147678f0 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888014767a10 R13=ffff8880147679f8 R14=ffff8880147679f1 R15=ffff8880147679b0 RIP=ffffffff81130853 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 00007ff53dc33900 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=00007ff53d150000 CR3=000000000979c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=772ca5c19012a92a00000000000ae988 XMM05=5fa1376ec98f35ec0000000000131d88 XMM06=fd6fb291a15ca26e00000000001307b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000