syzkaller login: [ 30.823130] BUG: Bad rss-counter state mm:00000000577fb24a type:MM_FILEPAGES val:33 [ 30.824170] BUG: Bad rss-counter state mm:00000000577fb24a type:MM_ANONPAGES val:22 [ 30.985333] ================================================================== [ 30.986484] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.987634] Read of size 8 at addr ffff88801675a5c8 by task sshd/220 [ 30.988728] [ 30.988994] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.990026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.991171] Call Trace: [ 30.991504] [ 30.991785] dump_stack_lvl+0x91/0xf0 [ 30.992306] print_report+0xcc/0x620 [ 30.992799] ? __virt_addr_valid+0x102/0x340 [ 30.993374] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.994021] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.994673] kasan_report+0xbe/0xf0 [ 30.995149] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.995777] vma_interval_tree_remove+0xc75/0xec0 [ 30.996391] vma_prepare+0xc54/0x11a0 [ 30.996873] __split_vma+0x5af/0x950 [ 30.997343] ? __pfx___split_vma+0x10/0x10 [ 30.997889] ? find_held_lock+0x2c/0x110 [ 30.998425] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.998990] ? lock_is_held_type+0x9f/0x120 [ 30.999531] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.000156] ? mtree_range_walk+0x632/0x900 [ 31.000714] ? mas_walk+0x5c7/0x7c0 [ 31.001191] do_vmi_munmap+0x1f1/0x2b0 [ 31.001684] mmap_region+0x1f9/0x2660 [ 31.002173] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.002686] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.003400] ? __pfx_lock_acquire+0x10/0x10 [ 31.003945] ? __pfx_mmap_region+0x10/0x10 [ 31.004475] ? security_mmap_addr+0x7d/0xa0 [ 31.005007] ? get_unmapped_area+0x1f5/0x3f0 [ 31.005602] do_mmap+0x854/0xf00 [ 31.006052] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.006565] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.007150] ksys_mmap_pgoff+0x3af/0x500 [ 31.007680] do_syscall_64+0x3f/0x90 [ 31.008197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.008868] RIP: 0033:0x7f4594087d82 [ 31.009335] 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 [ 31.011540] RSP: 002b:00007fffe7944428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.012476] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4594087d82 [ 31.013381] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45934c1000 [ 31.014262] RBP: 00007f45934c1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.015153] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c354ffec0 [ 31.016026] R13: 00007fffe7944440 R14: 00007fffe7944470 R15: 00007fffe79447d0 [ 31.016928] [ 31.017229] [ 31.017456] Allocated by task 213: [ 31.017879] kasan_save_stack+0x22/0x50 [ 31.018386] kasan_set_track+0x25/0x30 [ 31.018878] __kasan_slab_alloc+0x59/0x70 [ 31.019405] kmem_cache_alloc+0x16b/0x370 [ 31.019941] vm_area_dup+0x20/0x160 [ 31.020400] __split_vma+0x170/0x950 [ 31.020894] split_vma+0xc6/0x110 [ 31.021340] mprotect_fixup+0x8d2/0xb30 [ 31.021847] do_mprotect_pkey+0x87e/0xd40 [ 31.022383] __x64_sys_mprotect+0x78/0xc0 [ 31.022919] do_syscall_64+0x3f/0x90 [ 31.023419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.024098] [ 31.024322] Freed by task 19: [ 31.024722] kasan_save_stack+0x22/0x50 [ 31.025244] kasan_set_track+0x25/0x30 [ 31.025766] kasan_save_free_info+0x2b/0x50 [ 31.026320] __kasan_slab_free+0x10a/0x190 [ 31.026875] kmem_cache_free+0x10d/0x4d0 [ 31.027409] rcu_core+0x8c8/0x2860 [ 31.027864] __do_softirq+0x1b7/0x7d4 [ 31.028374] [ 31.028594] Last potentially related work creation: [ 31.029305] kasan_save_stack+0x22/0x50 [ 31.029836] __kasan_record_aux_stack+0x8e/0xa0 [ 31.030439] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.031111] remove_vma+0x139/0x170 [ 31.031588] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.032153] do_vmi_munmap+0x1f1/0x2b0 [ 31.032640] __vm_munmap+0x138/0x3a0 [ 31.033107] __x64_sys_munmap+0x59/0x80 [ 31.033606] do_syscall_64+0x3f/0x90 [ 31.034084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.034734] [ 31.034953] The buggy address belongs to the object at ffff88801675a570 [ 31.034953] which belongs to the cache vm_area_struct of size 168 [ 31.036440] The buggy address is located 88 bytes inside of [ 31.036440] freed 168-byte region [ffff88801675a570, ffff88801675a618) [ 31.037929] [ 31.038149] The buggy address belongs to the physical page: [ 31.038814] page:0000000083f851e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1675a [ 31.039943] memcg:ffff88800f007001 [ 31.040375] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.041036] page_type: 0xffffffff() [ 31.041490] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.042417] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f007001 [ 31.043331] page dumped because: kasan: bad access detected [ 31.044012] [ 31.044234] Memory state around the buggy address: [ 31.044844] ffff88801675a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.045732] ffff88801675a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.046636] >ffff88801675a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.047522] ^ [ 31.048225] ffff88801675a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.049097] ffff88801675a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.049977] ================================================================== [ 31.050897] Disabling lock debugging due to kernel taint [ 33.212509] BUG: Bad rss-counter state mm:00000000d29c78bc type:MM_FILEPAGES val:33 [ 33.213512] BUG: Bad rss-counter state mm:00000000d29c78bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64207' (ECDSA) to the list of known hosts. [ 33.785101] BUG: Bad rss-counter state mm:0000000039e55ad2 type:MM_FILEPAGES val:33 [ 33.786016] BUG: Bad rss-counter state mm:0000000039e55ad2 type:MM_ANONPAGES val:22 2023/06/20 18:21:36 fuzzer started 2023/06/20 18:21:36 dialing manager at localhost:36067 2023/06/20 18:21:36 checking machine... 2023/06/20 18:21:36 checking revisions... [ 34.398786] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:21:36 testing simple program... [ 34.447082] cgroup: Unknown subsys name 'net' [ 34.492973] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:21:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8162f8a4 RDX=ffff8880158f8000 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff888016a6fb40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=4920230a2e445342 R12=ffffea00006d7600 R13=ffff888016a6fc00 R14=ffff888016a6fe00 R15=dffffc0000000000 RIP=ffffffff814c0860 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 00007fb05f254900 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=00007fb05f809650 CR3=000000000e694000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=00007fbb93b27190 CR3=000000000d93a000 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=650894349ba12ab16e4930945849fbe3 XMM02=000000000011da38eff9b2d0a8fce9cb XMM03=000000000011db082c67c8bc2e329bc3 XMM04=07bbf771ad340ed600000000000ae988 XMM05=19e9129bd510f2350000000000132000 XMM06=070458ed7b6ee4520000000000130e68 XMM07=e042d86d42eb936e0000000000122410 XMM08=0d6a7adaa94b42cb000000000011db08 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000