[ 25.287575] BUG: Bad rss-counter state mm:00000000d3773df3 type:MM_FILEPAGES val:33 [ 25.288771] BUG: Bad rss-counter state mm:00000000d3773df3 type:MM_ANONPAGES val:22 [ 25.322482] ================================================================== [ 25.323390] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.324342] Read of size 8 at addr ffff88800dac83f8 by task sshd/220 [ 25.325140] [ 25.325357] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.326439] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.327419] Call Trace: [ 25.327738] [ 25.328024] dump_stack_lvl+0x91/0xf0 [ 25.328558] print_report+0xcc/0x620 [ 25.329064] ? __virt_addr_valid+0x102/0x340 [ 25.329625] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.330243] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.330868] kasan_report+0xbe/0xf0 [ 25.331353] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.332010] vma_interval_tree_remove+0xc75/0xec0 [ 25.332642] vma_prepare+0xc54/0x11a0 [ 25.333153] __split_vma+0x5af/0x950 [ 25.333650] ? __pfx___split_vma+0x10/0x10 [ 25.334203] ? find_held_lock+0x2c/0x110 [ 25.334756] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.335358] ? lock_is_held_type+0x9f/0x120 [ 25.335922] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.336558] ? mtree_range_walk+0x632/0x900 [ 25.337143] ? mas_walk+0x5c7/0x7c0 [ 25.337647] do_vmi_munmap+0x1f1/0x2b0 [ 25.338159] mmap_region+0x1f9/0x2660 [ 25.338657] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.339199] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.339972] ? __pfx_lock_acquire+0x10/0x10 [ 25.340548] ? __pfx_mmap_region+0x10/0x10 [ 25.341130] ? security_mmap_addr+0x7d/0xa0 [ 25.341692] ? get_unmapped_area+0x1f5/0x3f0 [ 25.342277] do_mmap+0x854/0xf00 [ 25.342735] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.343253] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.343848] ksys_mmap_pgoff+0x3af/0x500 [ 25.344380] do_syscall_64+0x3f/0x90 [ 25.344888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.345580] RIP: 0033:0x7f7572312d82 [ 25.346075] 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 [ 25.348352] RSP: 002b:00007ffe6300c068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.349335] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7572312d82 [ 25.350229] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f757174c000 [ 25.351126] RBP: 00007f757174c000 R08: 0000000000000009 R09: 0000000000001000 [ 25.352025] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d5390f1d90 [ 25.352922] R13: 00007ffe6300c080 R14: 00007ffe6300c0b0 R15: 00007ffe6300c410 [ 25.353833] [ 25.354138] [ 25.354361] Allocated by task 212: [ 25.354812] kasan_save_stack+0x22/0x50 [ 25.355338] kasan_set_track+0x25/0x30 [ 25.355864] __kasan_slab_alloc+0x59/0x70 [ 25.356420] kmem_cache_alloc+0x16b/0x370 [ 25.356973] vm_area_dup+0x20/0x160 [ 25.357480] __split_vma+0x170/0x950 [ 25.357974] split_vma+0xc6/0x110 [ 25.358442] mprotect_fixup+0x8d2/0xb30 [ 25.358978] do_mprotect_pkey+0x87e/0xd40 [ 25.359532] __x64_sys_mprotect+0x78/0xc0 [ 25.360077] do_syscall_64+0x3f/0x90 [ 25.360582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.361273] [ 25.361500] Freed by task 212: [ 25.361912] kasan_save_stack+0x22/0x50 [ 25.362434] kasan_set_track+0x25/0x30 [ 25.362955] kasan_save_free_info+0x2b/0x50 [ 25.363523] __kasan_slab_free+0x10a/0x190 [ 25.364093] kmem_cache_free+0x10d/0x4d0 [ 25.364639] rcu_core+0x8c8/0x2860 [ 25.365129] __do_softirq+0x1b7/0x7d4 [ 25.365649] [ 25.365878] Last potentially related work creation: [ 25.366504] kasan_save_stack+0x22/0x50 [ 25.367051] __kasan_record_aux_stack+0x8e/0xa0 [ 25.367654] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.368338] remove_vma+0x139/0x170 [ 25.368818] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.369425] do_vmi_munmap+0x1f1/0x2b0 [ 25.369948] __vm_munmap+0x138/0x3a0 [ 25.370450] __x64_sys_munmap+0x59/0x80 [ 25.370979] do_syscall_64+0x3f/0x90 [ 25.371483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.372161] [ 25.372388] Second to last potentially related work creation: [ 25.373132] kasan_save_stack+0x22/0x50 [ 25.373669] __kasan_record_aux_stack+0x8e/0xa0 [ 25.374294] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.374988] remove_vma+0x139/0x170 [ 25.375477] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.376065] do_vmi_munmap+0x1f1/0x2b0 [ 25.376575] mmap_region+0x1f9/0x2660 [ 25.377094] do_mmap+0x854/0xf00 [ 25.377542] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.378060] ksys_mmap_pgoff+0x3af/0x500 [ 25.378583] do_syscall_64+0x3f/0x90 [ 25.379095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.379770] [ 25.379998] The buggy address belongs to the object at ffff88800dac83a0 [ 25.379998] which belongs to the cache vm_area_struct of size 168 [ 25.381590] The buggy address is located 88 bytes inside of [ 25.381590] freed 168-byte region [ffff88800dac83a0, ffff88800dac8448) [ 25.383086] [ 25.383316] The buggy address belongs to the physical page: [ 25.384023] page:00000000e3b3d37a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdac8 [ 25.385195] memcg:ffff88800d2bdd01 [ 25.385648] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.386331] page_type: 0xffffffff() [ 25.386813] raw: 0100000000000200 ffff88800879fc80 ffffea00003d8880 dead00000000000a [ 25.387814] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2bdd01 [ 25.388799] page dumped because: kasan: bad access detected [ 25.389512] [ 25.389740] Memory state around the buggy address: [ 25.390369] ffff88800dac8280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 25.391281] ffff88800dac8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 25.392211] >ffff88800dac8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 25.393134] ^ [ 25.394043] ffff88800dac8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 25.394953] ffff88800dac8480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.395873] ================================================================== [ 25.397086] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.385789] BUG: Bad rss-counter state mm:00000000cd2e9af7 type:MM_FILEPAGES val:33 [ 27.386577] BUG: Bad rss-counter state mm:00000000cd2e9af7 type:MM_ANONPAGES val:22 [ 27.840945] BUG: Bad rss-counter state mm:000000006066ea98 type:MM_FILEPAGES val:33 [ 27.841708] BUG: Bad rss-counter state mm:000000006066ea98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5196' (ECDSA) to the list of known hosts. 2023/06/20 01:01:07 fuzzer started 2023/06/20 01:01:07 dialing manager at localhost:44161 2023/06/20 01:01:08 checking machine... 2023/06/20 01:01:08 checking revisions... [ 28.498367] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:01:08 testing simple program... [ 28.545834] cgroup: Unknown subsys name 'net' [ 28.598667] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:01:06 Registers: info registers vcpu 0 RAX=00000000a16bc695 RBX=000000005849de56 RCX=00000000f1a5685a RDX=000000000000000c RSI=0000000000000003 RDI=00000000275536bc RBP=0000000000000000 RSP=ffff88801002f9a8 R8 =000000005b68f2ef R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88801002fa10 R15=000000000000000c RIP=ffffffff82270f78 RFL=00000217 [----APC] 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 00007f0d77a2b900 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=00007ffebbe0a000 CR3=00000000187ea000 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=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 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=0000000000000001 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=00007fabcdca7030 CR3=0000000013988000 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=d32774c3644192855842b33d8e0e8894 XMM02=000000000011efc0ec2efd57dc4c00df XMM03=0000000000124e68b0b3fa3ec41be219 XMM04=dad8b2589f343bd200000000000ae988 XMM05=59d5b690e0af863b0000000000135aa0 XMM06=fc7d8b61e68302b20000000000134c78 XMM07=e042d86d42eb936e0000000000125140 XMM08=b0b3fa3ec41be219000000000011f020 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000