[ 30.011677] BUG: Bad rss-counter state mm:00000000096ed923 type:MM_FILEPAGES val:33 [ 30.012886] BUG: Bad rss-counter state mm:00000000096ed923 type:MM_ANONPAGES val:22 [ 30.050820] ================================================================== [ 30.051709] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.052638] Read of size 8 at addr ffff88800dea9798 by task sshd/218 [ 30.053403] [ 30.053616] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.054597] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.055579] Call Trace: [ 30.055902] [ 30.056189] dump_stack_lvl+0x91/0xf0 [ 30.056726] print_report+0xcc/0x620 [ 30.057206] ? __virt_addr_valid+0x102/0x340 [ 30.057764] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.058396] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.059013] kasan_report+0xbe/0xf0 [ 30.059485] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.060114] vma_interval_tree_remove+0xc75/0xec0 [ 30.060715] vma_prepare+0xc54/0x11a0 [ 30.061192] __split_vma+0x5af/0x950 [ 30.061662] ? __pfx___split_vma+0x10/0x10 [ 30.062219] ? find_held_lock+0x2c/0x110 [ 30.062739] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.063301] ? lock_is_held_type+0x9f/0x120 [ 30.063831] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.064435] ? mtree_range_walk+0x632/0x900 [ 30.064981] ? mas_walk+0x5c7/0x7c0 [ 30.065455] do_vmi_munmap+0x1f1/0x2b0 [ 30.065949] mmap_region+0x1f9/0x2660 [ 30.066442] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.066949] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.067670] ? __pfx_lock_acquire+0x10/0x10 [ 30.068202] ? __pfx_mmap_region+0x10/0x10 [ 30.068731] ? security_mmap_addr+0x7d/0xa0 [ 30.069259] ? get_unmapped_area+0x1f5/0x3f0 [ 30.069807] do_mmap+0x854/0xf00 [ 30.070263] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.070760] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.071316] ksys_mmap_pgoff+0x3af/0x500 [ 30.071830] do_syscall_64+0x3f/0x90 [ 30.072307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.072951] RIP: 0033:0x7fe9a9c8cd82 [ 30.073408] 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 [ 30.075530] RSP: 002b:00007ffdad68ba68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.076445] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe9a9c8cd82 [ 30.077289] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9a90c6000 [ 30.078161] RBP: 00007fe9a90c6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.079014] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad47298ec0 [ 30.079866] R13: 00007ffdad68ba80 R14: 00007ffdad68bab0 R15: 00007ffdad68be10 [ 30.080716] [ 30.081018] [ 30.081235] Allocated by task 207: [ 30.081665] kasan_save_stack+0x22/0x50 [ 30.082197] kasan_set_track+0x25/0x30 [ 30.082690] __kasan_slab_alloc+0x59/0x70 [ 30.083208] kmem_cache_alloc+0x16b/0x370 [ 30.083720] vm_area_dup+0x20/0x160 [ 30.084170] __split_vma+0x170/0x950 [ 30.084640] split_vma+0xc6/0x110 [ 30.085077] mprotect_fixup+0x8d2/0xb30 [ 30.085578] do_mprotect_pkey+0x87e/0xd40 [ 30.086106] __x64_sys_mprotect+0x78/0xc0 [ 30.086629] do_syscall_64+0x3f/0x90 [ 30.087102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.087748] [ 30.087965] Freed by task 207: [ 30.088354] kasan_save_stack+0x22/0x50 [ 30.088851] kasan_set_track+0x25/0x30 [ 30.089348] kasan_save_free_info+0x2b/0x50 [ 30.089877] __kasan_slab_free+0x10a/0x190 [ 30.090426] kmem_cache_free+0x10d/0x4d0 [ 30.090935] rcu_core+0x8c8/0x2860 [ 30.091384] __do_softirq+0x1b7/0x7d4 [ 30.091859] [ 30.092075] Last potentially related work creation: [ 30.092660] kasan_save_stack+0x22/0x50 [ 30.093167] __kasan_record_aux_stack+0x8e/0xa0 [ 30.093743] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.094393] remove_vma+0x139/0x170 [ 30.094847] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.095402] do_vmi_munmap+0x1f1/0x2b0 [ 30.095887] __vm_munmap+0x138/0x3a0 [ 30.096352] __x64_sys_munmap+0x59/0x80 [ 30.096851] do_syscall_64+0x3f/0x90 [ 30.097325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.097961] [ 30.098193] Second to last potentially related work creation: [ 30.098888] kasan_save_stack+0x22/0x50 [ 30.099389] __kasan_record_aux_stack+0x8e/0xa0 [ 30.099964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.100606] remove_vma+0x139/0x170 [ 30.101058] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.101609] do_vmi_munmap+0x1f1/0x2b0 [ 30.102102] mmap_region+0x1f9/0x2660 [ 30.102581] do_mmap+0x854/0xf00 [ 30.103015] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.103502] ksys_mmap_pgoff+0x3af/0x500 [ 30.104000] do_syscall_64+0x3f/0x90 [ 30.104472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.105112] [ 30.105328] The buggy address belongs to the object at ffff88800dea9740 [ 30.105328] which belongs to the cache vm_area_struct of size 168 [ 30.106792] The buggy address is located 88 bytes inside of [ 30.106792] freed 168-byte region [ffff88800dea9740, ffff88800dea97e8) [ 30.108203] [ 30.108417] The buggy address belongs to the physical page: [ 30.109077] page:00000000d7681761 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdea9 [ 30.110187] memcg:ffff88800de96101 [ 30.110621] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.111265] page_type: 0xffffffff() [ 30.111717] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 30.112627] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de96101 [ 30.113531] page dumped because: kasan: bad access detected [ 30.114194] [ 30.114409] Memory state around the buggy address: [ 30.114996] ffff88800dea9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.115848] ffff88800dea9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.116696] >ffff88800dea9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.117544] ^ [ 30.118054] ffff88800dea9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.118925] ffff88800dea9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.119766] ================================================================== [ 30.120816] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.785564] BUG: Bad rss-counter state mm:00000000ccb1eb70 type:MM_FILEPAGES val:33 [ 31.786146] BUG: Bad rss-counter state mm:00000000ccb1eb70 type:MM_ANONPAGES val:22 [ 32.191317] BUG: Bad rss-counter state mm:000000007c651161 type:MM_FILEPAGES val:33 [ 32.191967] BUG: Bad rss-counter state mm:000000007c651161 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38796' (ECDSA) to the list of known hosts. 2023/06/19 21:03:41 fuzzer started 2023/06/19 21:03:42 dialing manager at localhost:44161 2023/06/19 21:03:42 checking machine... 2023/06/19 21:03:42 checking revisions... [ 32.842472] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:03:42 testing simple program... [ 32.888784] cgroup: Unknown subsys name 'net' [ 32.925278] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:03:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800ca1eda0 RCX=0000000000000001 RDX=1ffff11001943dd2 RSI=ffffffff846000aa RDI=ffff88800ca1edac RBP=ffff88800ca1ee90 RSP=ffff88800ca1ecb8 R8 =0000000000000001 R9 =ffff88800ca1ed18 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800ca1eda0 R13=0000000000000000 R14=ffff88801453b680 R15=ffff88800ca1f1f8 RIP=ffffffff813ad4f7 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 00007fe182506900 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=00007fe1824bf008 CR3=000000001c9fa000 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=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 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=00007fe192839690 CR3=000000000ecce000 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=2031343a33303a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a33303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000