[ 28.701726] BUG: Bad rss-counter state mm:00000000066779b7 type:MM_FILEPAGES val:33 [ 28.702735] BUG: Bad rss-counter state mm:00000000066779b7 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.870977] ================================================================== [ 28.871886] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.872822] Read of size 8 at addr ffff88800dba24e0 by task sshd/219 [ 28.873720] [ 28.873954] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.874865] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.875940] Call Trace: [ 28.876278] [ 28.876582] dump_stack_lvl+0x91/0xf0 [ 28.877118] print_report+0xcc/0x620 [ 28.877643] ? __virt_addr_valid+0x102/0x340 [ 28.878254] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.878891] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.879545] kasan_report+0xbe/0xf0 [ 28.880043] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.880693] vma_interval_tree_remove+0xc75/0xec0 [ 28.881357] vma_prepare+0xc54/0x11a0 [ 28.881860] __split_vma+0x5af/0x950 [ 28.882369] ? __pfx___split_vma+0x10/0x10 [ 28.882928] ? find_held_lock+0x2c/0x110 [ 28.883494] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.884142] ? lock_is_held_type+0x9f/0x120 [ 28.884720] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.885411] ? mtree_range_walk+0x632/0x900 [ 28.886048] ? mas_walk+0x5c7/0x7c0 [ 28.886606] do_vmi_munmap+0x1f1/0x2b0 [ 28.887151] mmap_region+0x1f9/0x2660 [ 28.887672] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.888221] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.888966] ? __pfx_lock_acquire+0x10/0x10 [ 28.889506] ? __pfx_mmap_region+0x10/0x10 [ 28.890035] ? security_mmap_addr+0x7d/0xa0 [ 28.890559] ? get_unmapped_area+0x1f5/0x3f0 [ 28.891104] do_mmap+0x854/0xf00 [ 28.891538] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.892027] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.892581] ksys_mmap_pgoff+0x3af/0x500 [ 28.893086] do_syscall_64+0x3f/0x90 [ 28.893591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.894245] RIP: 0033:0x7f89e1b24d82 [ 28.894698] 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 [ 28.896804] RSP: 002b:00007ffc4e21dbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.897716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f89e1b24d82 [ 28.898549] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f89e0f5e000 [ 28.899381] RBP: 00007f89e0f5e000 R08: 0000000000000009 R09: 0000000000001000 [ 28.900211] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eaef271ec0 [ 28.901051] R13: 00007ffc4e21dbf0 R14: 00007ffc4e21dc20 R15: 00007ffc4e21df80 [ 28.901922] [ 28.902215] [ 28.902426] Allocated by task 212: [ 28.902855] kasan_save_stack+0x22/0x50 [ 28.903356] kasan_set_track+0x25/0x30 [ 28.903845] __kasan_slab_alloc+0x59/0x70 [ 28.904367] kmem_cache_alloc+0x16b/0x370 [ 28.904877] vm_area_dup+0x20/0x160 [ 28.905346] __split_vma+0x170/0x950 [ 28.905803] split_vma+0xc6/0x110 [ 28.906235] mprotect_fixup+0x8d2/0xb30 [ 28.906726] do_mprotect_pkey+0x87e/0xd40 [ 28.907243] __x64_sys_mprotect+0x78/0xc0 [ 28.907754] do_syscall_64+0x3f/0x90 [ 28.908219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.908847] [ 28.909060] Freed by task 212: [ 28.909475] kasan_save_stack+0x22/0x50 [ 28.909976] kasan_set_track+0x25/0x30 [ 28.910468] kasan_save_free_info+0x2b/0x50 [ 28.910992] __kasan_slab_free+0x10a/0x190 [ 28.911514] kmem_cache_free+0x10d/0x4d0 [ 28.912017] rcu_core+0x8c8/0x2860 [ 28.912458] __do_softirq+0x1b7/0x7d4 [ 28.912929] [ 28.913143] Last potentially related work creation: [ 28.913734] kasan_save_stack+0x22/0x50 [ 28.914235] __kasan_record_aux_stack+0x8e/0xa0 [ 28.914803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.915438] remove_vma+0x139/0x170 [ 28.915883] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.916437] do_vmi_munmap+0x1f1/0x2b0 [ 28.916915] __vm_munmap+0x138/0x3a0 [ 28.917397] __x64_sys_munmap+0x59/0x80 [ 28.917896] do_syscall_64+0x3f/0x90 [ 28.918363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.918996] [ 28.919209] The buggy address belongs to the object at ffff88800dba2488 [ 28.919209] which belongs to the cache vm_area_struct of size 168 [ 28.920670] The buggy address is located 88 bytes inside of [ 28.920670] freed 168-byte region [ffff88800dba2488, ffff88800dba2530) [ 28.922126] [ 28.922346] The buggy address belongs to the physical page: [ 28.923013] page:00000000ab83a714 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdba2 [ 28.924097] memcg:ffff88800de1c301 [ 28.924528] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.925236] page_type: 0xffffffff() [ 28.925687] raw: 0100000000000200 ffff88800879fc80 ffffea00003ce0c0 dead000000000005 [ 28.926618] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de1c301 [ 28.927513] page dumped because: kasan: bad access detected [ 28.928187] [ 28.928401] Memory state around the buggy address: [ 28.928982] ffff88800dba2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.929846] ffff88800dba2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.930699] >ffff88800dba2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.931547] ^ [ 28.932287] ffff88800dba2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 28.933131] ffff88800dba2580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.933995] ================================================================== [ 28.935056] Disabling lock debugging due to kernel taint [ 31.228779] BUG: Bad rss-counter state mm:000000008165e730 type:MM_FILEPAGES val:33 [ 31.229802] BUG: Bad rss-counter state mm:000000008165e730 type:MM_ANONPAGES val:22 [ 31.748429] BUG: Bad rss-counter state mm:00000000f919ede4 type:MM_FILEPAGES val:33 [ 31.749596] BUG: Bad rss-counter state mm:00000000f919ede4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28052' (ECDSA) to the list of known hosts. 2023/06/20 02:21:39 fuzzer started 2023/06/20 02:21:40 dialing manager at localhost:44161 2023/06/20 02:21:40 checking machine... 2023/06/20 02:21:40 checking revisions... [ 32.522587] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:21:40 testing simple program... [ 32.575807] cgroup: Unknown subsys name 'net' [ 32.629912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:21:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000624 RDI=ffffffff8486f1a0 RBP=ffffffff8486f1a0 RSP=ffff888015aafb20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000624 R13=ffff888019b05cb8 R14=ffff888015aafdb0 R15=ffff888015aafe00 RIP=ffffffff8122e3bd 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 00007f47fac10700 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=00007eff7db00e28 CR3=0000000015960000 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=2039333a31323a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a31323a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000003 RCX=ffffffff8449ee3e RDX=ffff8880181eb680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff84e38f80 RSP=ffff888010357cb0 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=0000000000000003 R13=0000000000000005 R14=0000000000000003 R15=ffffffffffffffff RIP=ffffffff814c01fc 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 00007f6d1a028900 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=00007f6d1a79a3ec CR3=000000001a2aa000 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=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