[ 30.326316] BUG: Bad rss-counter state mm:00000000ebe5bd90 type:MM_FILEPAGES val:33 [ 30.327592] BUG: Bad rss-counter state mm:00000000ebe5bd90 type:MM_ANONPAGES val:22 [ 30.492653] ================================================================== [ 30.493695] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.494798] Read of size 8 at addr ffff88800c66f310 by task sshd/219 [ 30.495833] [ 30.496090] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.497087] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.498236] Call Trace: [ 30.498581] <TASK> [ 30.498868] dump_stack_lvl+0x91/0xf0 [ 30.499342] print_report+0xcc/0x620 [ 30.499811] ? __virt_addr_valid+0x102/0x340 [ 30.500343] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.500939] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.501544] kasan_report+0xbe/0xf0 [ 30.502108] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.502750] vma_interval_tree_remove+0xc75/0xec0 [ 30.503358] vma_prepare+0xc54/0x11a0 [ 30.503830] __split_vma+0x5af/0x950 [ 30.504303] ? __pfx___split_vma+0x10/0x10 [ 30.504823] ? find_held_lock+0x2c/0x110 [ 30.505344] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.505908] ? lock_is_held_type+0x9f/0x120 [ 30.506453] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.507075] ? mtree_range_walk+0x632/0x900 [ 30.507626] ? mas_walk+0x5c7/0x7c0 [ 30.508100] do_vmi_munmap+0x1f1/0x2b0 [ 30.508593] mmap_region+0x1f9/0x2660 [ 30.509072] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.509578] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.510286] ? __pfx_lock_acquire+0x10/0x10 [ 30.510832] ? __pfx_mmap_region+0x10/0x10 [ 30.511365] ? security_mmap_addr+0x7d/0xa0 [ 30.511890] ? get_unmapped_area+0x1f5/0x3f0 [ 30.512439] do_mmap+0x854/0xf00 [ 30.512878] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.513371] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.513931] ksys_mmap_pgoff+0x3af/0x500 [ 30.514434] do_syscall_64+0x3f/0x90 [ 30.514931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.515580] RIP: 0033:0x7fc333a93d82 [ 30.516043] 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 [ 30.518162] RSP: 002b:00007ffd9918b268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.519074] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc333a93d82 [ 30.519917] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc332ecd000 [ 30.520760] RBP: 00007fc332ecd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.521621] R10: 0000000000000812 R11: 0000000000000206 R12: 000056134ecc3ec0 [ 30.522465] R13: 00007ffd9918b280 R14: 00007ffd9918b2b0 R15: 00007ffd9918b610 [ 30.523338] </TASK> [ 30.523628] [ 30.523841] Allocated by task 212: [ 30.524266] kasan_save_stack+0x22/0x50 [ 30.524775] kasan_set_track+0x25/0x30 [ 30.525266] __kasan_slab_alloc+0x59/0x70 [ 30.525790] kmem_cache_alloc+0x16b/0x370 [ 30.526305] vm_area_dup+0x20/0x160 [ 30.526777] __split_vma+0x170/0x950 [ 30.527246] split_vma+0xc6/0x110 [ 30.527686] mprotect_fixup+0x8d2/0xb30 [ 30.528187] do_mprotect_pkey+0x87e/0xd40 [ 30.528709] __x64_sys_mprotect+0x78/0xc0 [ 30.529240] do_syscall_64+0x3f/0x90 [ 30.529722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.530367] [ 30.530581] Freed by task 203: [ 30.530980] kasan_save_stack+0x22/0x50 [ 30.531484] kasan_set_track+0x25/0x30 [ 30.531970] kasan_save_free_info+0x2b/0x50 [ 30.532499] __kasan_slab_free+0x10a/0x190 [ 30.533028] kmem_cache_free+0x10d/0x4d0 [ 30.533534] rcu_core+0x8c8/0x2860 [ 30.533974] __do_softirq+0x1b7/0x7d4 [ 30.534452] [ 30.534690] Last potentially related work creation: [ 30.535272] kasan_save_stack+0x22/0x50 [ 30.535781] __kasan_record_aux_stack+0x8e/0xa0 [ 30.536357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.537087] remove_vma+0x139/0x170 [ 30.537543] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.538094] do_vmi_munmap+0x1f1/0x2b0 [ 30.538580] __vm_munmap+0x138/0x3a0 [ 30.539060] __x64_sys_munmap+0x59/0x80 [ 30.539557] do_syscall_64+0x3f/0x90 [ 30.540033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.540689] [ 30.540903] The buggy address belongs to the object at ffff88800c66f2b8 [ 30.540903] which belongs to the cache vm_area_struct of size 168 [ 30.542368] The buggy address is located 88 bytes inside of [ 30.542368] freed 168-byte region [ffff88800c66f2b8, ffff88800c66f360) [ 30.543767] [ 30.543984] The buggy address belongs to the physical page: [ 30.544648] page:00000000aed93586 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc66f [ 30.545727] memcg:ffff88800c919d01 [ 30.546158] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.546820] page_type: 0xffffffff() [ 30.547269] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b2ec0 dead000000000004 [ 30.548190] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c919d01 [ 30.549108] page dumped because: kasan: bad access detected [ 30.549769] [ 30.549984] Memory state around the buggy address: [ 30.550564] ffff88800c66f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.551433] ffff88800c66f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.552284] >ffff88800c66f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.553124] ^ [ 30.553584] ffff88800c66f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.554432] ffff88800c66f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.555287] ================================================================== [ 30.556192] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.427187] BUG: Bad rss-counter state mm:0000000016f5b40a type:MM_FILEPAGES val:33 [ 33.428530] BUG: Bad rss-counter state mm:0000000016f5b40a type:MM_ANONPAGES val:22 [ 33.937943] BUG: Bad rss-counter state mm:0000000051ed1ce0 type:MM_FILEPAGES val:33 [ 33.938979] BUG: Bad rss-counter state mm:0000000051ed1ce0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38542' (ECDSA) to the list of known hosts. 2023/06/21 07:42:22 fuzzer started 2023/06/21 07:42:22 dialing manager at localhost:36067 2023/06/21 07:42:22 checking machine... 2023/06/21 07:42:22 checking revisions... [ 34.677078] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:42:22 testing simple program... [ 34.733483] cgroup: Unknown subsys name 'net' [ 34.794149] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:42:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888009bc79a0 RCX=0000000000000001 RDX=1ffff11001378f35 RSI=ffff888009bc7f00 RDI=ffff888009bc79a8 RBP=ffff888009bc7f00 RSP=ffff888009bc78f8 R8 =0000000000000001 R9 =ffff888009bc79e0 R10=0000000000038001 R11=00000000000b5d59 R12=0000000000000008 R13=ffff888009bc79e8 R14=ffff888009bc7f00 R15=ffff888009bc79a0 RIP=ffffffff81130445 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7cfacf9900 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=00007f7cfb2b0618 CR3=000000000e498000 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=6f6f72223d746363612078756e696c65 XMM02=00000000000000000000000000ffffff XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f3d99a24910 CR3=000000000c972000 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=da71b1b3339b2e89a347d8325b14511a XMM02=000000000011b2d0eff9b2d0a8fce9cb XMM03=000000000011b3a02c67c8bc2e329bc3 XMM04=d1e522959d379a4500000000000ae988 XMM05=dfcdbad4f1609c3700000000001313f0 XMM06=2517a7b801c01afb00000000001305c8 XMM07=e042d86d42eb936e0000000000121b78 XMM08=7425eb3e42566e4a000000000011b3a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000