[ 50.927022] BUG: Bad rss-counter state mm:000000009d42bee0 type:MM_FILEPAGES val:33 [ 50.927950] BUG: Bad rss-counter state mm:000000009d42bee0 type:MM_ANONPAGES val:22 [ 51.027572] ================================================================== [ 51.028730] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.029893] Read of size 8 at addr ffff88800c758798 by task sshd/220 [ 51.030534] [ 51.030720] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 51.031572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.032392] Call Trace: [ 51.032672] [ 51.032913] dump_stack_lvl+0x91/0xf0 [ 51.033323] print_report+0xcc/0x620 [ 51.033727] ? __virt_addr_valid+0x102/0x340 [ 51.034184] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.034698] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.035208] kasan_report+0xbe/0xf0 [ 51.035607] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.036119] vma_interval_tree_remove+0xc75/0xec0 [ 51.036637] vma_prepare+0xc54/0x11a0 [ 51.037041] __split_vma+0x5af/0x950 [ 51.037437] ? __pfx___split_vma+0x10/0x10 [ 51.037879] ? find_held_lock+0x2c/0x110 [ 51.038313] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.038784] ? lock_is_held_type+0x9f/0x120 [ 51.039229] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.039731] ? mtree_range_walk+0x632/0x900 [ 51.040189] ? mas_walk+0x5c7/0x7c0 [ 51.040604] do_vmi_munmap+0x1f1/0x2b0 [ 51.040874] mmap_region+0x1f9/0x2660 [ 51.041126] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.041392] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.041760] ? __pfx_lock_acquire+0x10/0x10 [ 51.042038] ? __pfx_mmap_region+0x10/0x10 [ 51.042314] ? security_mmap_addr+0x7d/0xa0 [ 51.042589] ? get_unmapped_area+0x1f5/0x3f0 [ 51.042878] do_mmap+0x854/0xf00 [ 51.043107] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.043369] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.043662] ksys_mmap_pgoff+0x3af/0x500 [ 51.043926] do_syscall_64+0x3f/0x90 [ 51.044175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.044515] RIP: 0033:0x7f80449cad82 [ 51.044752] 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 [ 51.045841] RSP: 002b:00007ffed42bea68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.046306] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f80449cad82 [ 51.046749] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8043e04000 [ 51.047186] RBP: 00007f8043e04000 R08: 0000000000000009 R09: 0000000000001000 [ 51.047619] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643665eed90 [ 51.048058] R13: 00007ffed42bea80 R14: 00007ffed42beab0 R15: 00007ffed42bee10 [ 51.048500] [ 51.048652] [ 51.048764] Allocated by task 213: [ 51.048984] kasan_save_stack+0x22/0x50 [ 51.049241] kasan_set_track+0x25/0x30 [ 51.049494] __kasan_slab_alloc+0x59/0x70 [ 51.049766] kmem_cache_alloc+0x16b/0x370 [ 51.050031] vm_area_dup+0x20/0x160 [ 51.050265] __split_vma+0x170/0x950 [ 51.050505] split_vma+0xc6/0x110 [ 51.050733] mprotect_fixup+0x8d2/0xb30 [ 51.050990] do_mprotect_pkey+0x87e/0xd40 [ 51.051258] __x64_sys_mprotect+0x78/0xc0 [ 51.051526] do_syscall_64+0x3f/0x90 [ 51.051773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.052104] [ 51.052219] Freed by task 204: [ 51.052422] kasan_save_stack+0x22/0x50 [ 51.052700] kasan_set_track+0x25/0x30 [ 51.053007] kasan_save_free_info+0x2b/0x50 [ 51.053379] __kasan_slab_free+0x10a/0x190 [ 51.053728] kmem_cache_free+0x10d/0x4d0 [ 51.054029] rcu_core+0x8c8/0x2860 [ 51.054337] __do_softirq+0x1b7/0x7d4 [ 51.054634] [ 51.054762] Last potentially related work creation: [ 51.055082] kasan_save_stack+0x22/0x50 [ 51.055362] __kasan_record_aux_stack+0x8e/0xa0 [ 51.055673] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.056024] remove_vma+0x139/0x170 [ 51.056269] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.056581] do_vmi_munmap+0x1f1/0x2b0 [ 51.056848] __vm_munmap+0x138/0x3a0 [ 51.057102] __x64_sys_munmap+0x59/0x80 [ 51.057368] do_syscall_64+0x3f/0x90 [ 51.057625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.057973] [ 51.058090] The buggy address belongs to the object at ffff88800c758740 [ 51.058090] which belongs to the cache vm_area_struct of size 168 [ 51.058889] The buggy address is located 88 bytes inside of [ 51.058889] freed 168-byte region [ffff88800c758740, ffff88800c7587e8) [ 51.059660] [ 51.059779] The buggy address belongs to the physical page: [ 51.060138] page:000000000dac94fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc758 [ 51.060730] memcg:ffff888009380b01 [ 51.060965] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 51.061344] page_type: 0xffffffff() [ 51.061591] raw: 0100000000000200 ffff88800879fc80 ffffea00005a31c0 dead000000000003 [ 51.062097] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009380b01 [ 51.062588] page dumped because: kasan: bad access detected [ 51.062966] [ 51.063085] Memory state around the buggy address: [ 51.063413] ffff88800c758680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.063901] ffff88800c758700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 51.064387] >ffff88800c758780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 51.064880] ^ [ 51.065155] ffff88800c758800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 51.065630] ffff88800c758880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 51.066110] ================================================================== [ 51.066673] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 53.245483] BUG: Bad rss-counter state mm:0000000003cb9106 type:MM_FILEPAGES val:33 [ 53.246694] BUG: Bad rss-counter state mm:0000000003cb9106 type:MM_ANONPAGES val:22 [ 53.659612] BUG: Bad rss-counter state mm:0000000024bd3cae type:MM_FILEPAGES val:33 [ 53.660916] BUG: Bad rss-counter state mm:0000000024bd3cae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2655' (ECDSA) to the list of known hosts. 2023/06/19 20:04:44 fuzzer started 2023/06/19 20:04:44 dialing manager at localhost:44161 2023/06/19 20:04:44 checking machine... 2023/06/19 20:04:44 checking revisions... [ 54.359433] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:04:44 testing simple program... [ 54.400616] cgroup: Unknown subsys name 'net' [ 54.453816] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:04:16 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f40360d0f10 CR3=000000000d7f0000 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=59bd3a871651dba6ed43ad5abf9e5b54 XMM02=2c67c8bc2e329bc30000000000127600 XMM03=fb795ef6d6577056000000000012d8b0 XMM04=7d87f8421f7dac4700000000000ae988 XMM05=19e9129bd510f235000000000013cf78 XMM06=aefac081c3cb4cf8000000000013c150 XMM07=e042d86d42eb936e000000000012db88 XMM08=10442bed2ae2d6e90000000000127660 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11003329e36 RSI=ffffffff81745a69 RDI=ffff88801994f220 RBP=ffff88801994f1f0 RSP=ffff88801994f150 R8 =0000000000000001 R9 =ffff88801994f198 R10=0000000000038001 R11=000000000001e468 R12=ffff88801994f220 R13=0000000000000000 R14=ffff88801848b680 R15=ffff888016d3b000 RIP=ffffffff813ad42e 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 00007ff385c35900 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=00007ff385bfa008 CR3=000000000e0a4000 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=00000000000000000000000000000000 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