syzkaller login: [ 31.300444] BUG: Bad rss-counter state mm:000000000e75201c type:MM_FILEPAGES val:33 [ 31.302695] BUG: Bad rss-counter state mm:000000000e75201c type:MM_ANONPAGES val:22 [ 31.464480] ================================================================== [ 31.465607] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.466768] Read of size 8 at addr ffff88800bfe1d08 by task sshd/222 [ 31.467746] [ 31.467970] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.468843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.469860] Call Trace: [ 31.470193] [ 31.470481] dump_stack_lvl+0x91/0xf0 [ 31.470981] print_report+0xcc/0x620 [ 31.471467] ? __virt_addr_valid+0x102/0x340 [ 31.472029] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.472657] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.473282] kasan_report+0xbe/0xf0 [ 31.473779] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.474420] vma_interval_tree_remove+0xc75/0xec0 [ 31.475037] vma_prepare+0xc54/0x11a0 [ 31.475522] __split_vma+0x5af/0x950 [ 31.476002] ? __pfx___split_vma+0x10/0x10 [ 31.476532] ? find_held_lock+0x2c/0x110 [ 31.477057] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.477650] ? lock_is_held_type+0x9f/0x120 [ 31.478193] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.478808] ? mtree_range_walk+0x632/0x900 [ 31.479369] ? mas_walk+0x5c7/0x7c0 [ 31.479850] do_vmi_munmap+0x1f1/0x2b0 [ 31.480349] mmap_region+0x1f9/0x2660 [ 31.480841] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.481354] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.482087] ? __pfx_lock_acquire+0x10/0x10 [ 31.482625] ? __pfx_mmap_region+0x10/0x10 [ 31.483172] ? security_mmap_addr+0x7d/0xa0 [ 31.483709] ? get_unmapped_area+0x1f5/0x3f0 [ 31.484268] do_mmap+0x854/0xf00 [ 31.484716] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.485213] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.485792] ksys_mmap_pgoff+0x3af/0x500 [ 31.486294] do_syscall_64+0x3f/0x90 [ 31.486789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.487443] RIP: 0033:0x7f39a5ab8d82 [ 31.487908] 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 [ 31.490086] RSP: 002b:00007ffed1f63418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.491015] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39a5ab8d82 [ 31.491892] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39a4ef2000 [ 31.492760] RBP: 00007f39a4ef2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.493643] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560634f0eb20 [ 31.494506] R13: 00007ffed1f63430 R14: 00007ffed1f63460 R15: 00007ffed1f637c0 [ 31.495383] [ 31.495690] [ 31.495910] Allocated by task 215: [ 31.496359] kasan_save_stack+0x22/0x50 [ 31.496875] kasan_set_track+0x25/0x30 [ 31.497373] __kasan_slab_alloc+0x59/0x70 [ 31.497921] kmem_cache_alloc+0x16b/0x370 [ 31.498441] vm_area_dup+0x20/0x160 [ 31.498903] __split_vma+0x170/0x950 [ 31.499383] split_vma+0xc6/0x110 [ 31.499833] mprotect_fixup+0x8d2/0xb30 [ 31.500351] do_mprotect_pkey+0x87e/0xd40 [ 31.500875] __x64_sys_mprotect+0x78/0xc0 [ 31.501408] do_syscall_64+0x3f/0x90 [ 31.501898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.502551] [ 31.502776] Freed by task 215: [ 31.503178] kasan_save_stack+0x22/0x50 [ 31.503689] kasan_set_track+0x25/0x30 [ 31.504190] kasan_save_free_info+0x2b/0x50 [ 31.504731] __kasan_slab_free+0x10a/0x190 [ 31.505266] kmem_cache_free+0x10d/0x4d0 [ 31.505787] rcu_core+0x8c8/0x2860 [ 31.506242] __do_softirq+0x1b7/0x7d4 [ 31.506730] [ 31.506952] Last potentially related work creation: [ 31.507558] kasan_save_stack+0x22/0x50 [ 31.508082] __kasan_record_aux_stack+0x8e/0xa0 [ 31.508665] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.509315] remove_vma+0x139/0x170 [ 31.509785] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.510348] do_vmi_munmap+0x1f1/0x2b0 [ 31.510850] __vm_munmap+0x138/0x3a0 [ 31.511320] __x64_sys_munmap+0x59/0x80 [ 31.511819] do_syscall_64+0x3f/0x90 [ 31.512305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.512957] [ 31.513171] The buggy address belongs to the object at ffff88800bfe1cb0 [ 31.513171] which belongs to the cache vm_area_struct of size 168 [ 31.514675] The buggy address is located 88 bytes inside of [ 31.514675] freed 168-byte region [ffff88800bfe1cb0, ffff88800bfe1d58) [ 31.516106] [ 31.516330] The buggy address belongs to the physical page: [ 31.517010] page:00000000f5ee99f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbfe1 [ 31.518124] memcg:ffff88800e78aa01 [ 31.518562] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.519221] page_type: 0xffffffff() [ 31.519678] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.520623] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e78aa01 [ 31.521565] page dumped because: kasan: bad access detected [ 31.522229] [ 31.522451] Memory state around the buggy address: [ 31.523035] ffff88800bfe1c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.523905] ffff88800bfe1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.524784] >ffff88800bfe1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.525664] ^ [ 31.526106] ffff88800bfe1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.526981] ffff88800bfe1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.527849] ================================================================== [ 31.528839] Disabling lock debugging due to kernel taint [ 33.523587] BUG: Bad rss-counter state mm:00000000b8f36529 type:MM_FILEPAGES val:33 [ 33.524591] BUG: Bad rss-counter state mm:00000000b8f36529 type:MM_ANONPAGES val:22 [ 34.006332] BUG: Bad rss-counter state mm:000000002ba6f7ad type:MM_FILEPAGES val:33 [ 34.007510] BUG: Bad rss-counter state mm:000000002ba6f7ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2856' (ECDSA) to the list of known hosts. 2023/06/20 20:01:25 fuzzer started 2023/06/20 20:01:26 dialing manager at localhost:36067 2023/06/20 20:01:26 checking machine... 2023/06/20 20:01:26 checking revisions... [ 34.671087] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:01:26 testing simple program... [ 34.717019] cgroup: Unknown subsys name 'net' [ 34.766015] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:01:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=0000561493c71fe0 CR3=0000000005482000 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=00007f65c6062510000055b596421790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001bee6d1 RBX=ffff88800df73658 RCX=ffffffff84536871 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800df73688 RBP=ffff888019ee9678 RSP=ffff88800d94f828 R8 =0000000000000001 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=0030733a745f6c65 R12=dffffc0000000000 R13=ffff888019eeaa00 R14=ffffffff81eeadb0 R15=1ffff11001b29f1d RIP=ffffffff818464e2 RFL=00000046 [---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 00007feba434f900 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=00007f775f74f650 CR3=0000000013aba000 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=a48d380852048fb7f24d1d0dc62e0ca8 XMM02=eff9b2d0a8fce9cb000000000011d920 XMM03=2c67c8bc2e329bc3000000000011da48 XMM04=80341bf54fd8c85500000000000ae988 XMM05=75595d9429edd6ee0000000000133108 XMM06=b879f4f2ab5013fd0000000000131ea8 XMM07=fb795ef6d65770560000000000122110 XMM08=2c67c8bc2e329bc3000000000011da48 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000