syzkaller login: [ 83.530726] BUG: Bad rss-counter state mm:00000000816a2987 type:MM_FILEPAGES val:33 [ 83.532180] BUG: Bad rss-counter state mm:00000000816a2987 type:MM_ANONPAGES val:22 [ 83.706936] ================================================================== [ 83.707907] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 83.708975] Read of size 8 at addr ffff888019f43a50 by task sshd/218 [ 83.709826] [ 83.710050] CPU: 0 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 83.711154] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 83.712167] Call Trace: [ 83.712517] [ 83.712826] dump_stack_lvl+0x91/0xf0 [ 83.713343] print_report+0xcc/0x620 [ 83.713961] ? __virt_addr_valid+0x102/0x340 [ 83.714542] ? vma_interval_tree_remove+0xc75/0xec0 [ 83.715183] ? vma_interval_tree_remove+0xc75/0xec0 [ 83.715807] kasan_report+0xbe/0xf0 [ 83.716295] ? vma_interval_tree_remove+0xc75/0xec0 [ 83.716952] vma_interval_tree_remove+0xc75/0xec0 [ 83.717562] vma_prepare+0xc54/0x11a0 [ 83.718048] __split_vma+0x5af/0x950 [ 83.718535] ? __pfx___split_vma+0x10/0x10 [ 83.719097] ? find_held_lock+0x2c/0x110 [ 83.719646] do_vmi_align_munmap+0x2ba/0x11f0 [ 83.720268] ? lock_is_held_type+0x9f/0x120 [ 83.720870] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 83.721505] ? mtree_range_walk+0x632/0x900 [ 83.722101] ? mas_walk+0x5c7/0x7c0 [ 83.722600] do_vmi_munmap+0x1f1/0x2b0 [ 83.723113] mmap_region+0x1f9/0x2660 [ 83.723627] ? vm_mmap_pgoff+0x15c/0x3a0 [ 83.724192] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 83.724973] ? __pfx_lock_acquire+0x10/0x10 [ 83.725546] ? __pfx_mmap_region+0x10/0x10 [ 83.726113] ? security_mmap_addr+0x7d/0xa0 [ 83.726672] ? get_unmapped_area+0x1f5/0x3f0 [ 83.727264] do_mmap+0x854/0xf00 [ 83.727736] vm_mmap_pgoff+0x1a6/0x3a0 [ 83.728267] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 83.728874] ksys_mmap_pgoff+0x3af/0x500 [ 83.729433] do_syscall_64+0x3f/0x90 [ 83.729937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 83.730631] RIP: 0033:0x7f7c77b2fd82 [ 83.731130] 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 [ 83.733383] RSP: 002b:00007ffc6bf2f2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 83.734353] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c77b2fd82 [ 83.735272] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c76f69000 [ 83.736185] RBP: 00007f7c76f69000 R08: 0000000000000009 R09: 0000000000001000 [ 83.737096] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562134cd3ec0 [ 83.737983] R13: 00007ffc6bf2f310 R14: 00007ffc6bf2f340 R15: 00007ffc6bf2f6a0 [ 83.738894] [ 83.739196] [ 83.739443] Allocated by task 211: [ 83.739903] kasan_save_stack+0x22/0x50 [ 83.740453] kasan_set_track+0x25/0x30 [ 83.740955] __kasan_slab_alloc+0x59/0x70 [ 83.741522] kmem_cache_alloc+0x16b/0x370 [ 83.742046] vm_area_dup+0x20/0x160 [ 83.742522] __split_vma+0x170/0x950 [ 83.743011] split_vma+0xc6/0x110 [ 83.743473] mprotect_fixup+0x8d2/0xb30 [ 83.744004] do_mprotect_pkey+0x87e/0xd40 [ 83.744570] __x64_sys_mprotect+0x78/0xc0 [ 83.745114] do_syscall_64+0x3f/0x90 [ 83.745618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 83.746298] [ 83.746516] Freed by task 202: [ 83.746932] kasan_save_stack+0x22/0x50 [ 83.747458] kasan_set_track+0x25/0x30 [ 83.747993] kasan_save_free_info+0x2b/0x50 [ 83.748556] __kasan_slab_free+0x10a/0x190 [ 83.749107] kmem_cache_free+0x10d/0x4d0 [ 83.749646] rcu_core+0x8c8/0x2860 [ 83.750109] __do_softirq+0x1b7/0x7d4 [ 83.750609] [ 83.750831] Last potentially related work creation: [ 83.751458] kasan_save_stack+0x22/0x50 [ 83.751997] __kasan_record_aux_stack+0x8e/0xa0 [ 83.752623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 83.753322] remove_vma+0x139/0x170 [ 83.753804] do_vmi_align_munmap+0xd4a/0x11f0 [ 83.754386] do_vmi_munmap+0x1f1/0x2b0 [ 83.754901] __vm_munmap+0x138/0x3a0 [ 83.755393] __x64_sys_munmap+0x59/0x80 [ 83.755915] do_syscall_64+0x3f/0x90 [ 83.756437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 83.757135] [ 83.757356] The buggy address belongs to the object at ffff888019f439f8 [ 83.757356] which belongs to the cache vm_area_struct of size 168 [ 83.758928] The buggy address is located 88 bytes inside of [ 83.758928] freed 168-byte region [ffff888019f439f8, ffff888019f43aa0) [ 83.760424] [ 83.760661] The buggy address belongs to the physical page: [ 83.761363] page:00000000ec5dac71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f43 [ 83.762529] memcg:ffff88800c495901 [ 83.762990] flags: 0x100000000000200(slab|node=0|zone=1) [ 83.763663] page_type: 0xffffffff() [ 83.764152] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 83.765135] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c495901 [ 83.766089] page dumped because: kasan: bad access detected [ 83.766778] [ 83.767013] Memory state around the buggy address: [ 83.767618] ffff888019f43900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 83.768547] ffff888019f43980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 83.769444] >ffff888019f43a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 83.770345] ^ [ 83.771053] ffff888019f43a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 83.771949] ffff888019f43b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 83.772847] ================================================================== [ 83.773901] Disabling lock debugging due to kernel taint [ 86.757778] BUG: Bad rss-counter state mm:00000000e10bf09c type:MM_FILEPAGES val:33 [ 86.758795] BUG: Bad rss-counter state mm:00000000e10bf09c type:MM_ANONPAGES val:22 [ 87.145552] BUG: Bad rss-counter state mm:0000000076422fca type:MM_FILEPAGES val:33 [ 87.146704] BUG: Bad rss-counter state mm:0000000076422fca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25298' (ECDSA) to the list of known hosts. 2023/06/19 20:54:52 fuzzer started 2023/06/19 20:54:53 dialing manager at localhost:44161 2023/06/19 20:54:53 checking machine... 2023/06/19 20:54:53 checking revisions... [ 87.847249] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:54:53 testing simple program... [ 87.901143] cgroup: Unknown subsys name 'net' [ 87.947099] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:54:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b40 RCX=ffffffff860f0e01 RDX=1ffff1100d9c1368 RSI=ffffffff83c1393c RDI=ffff88806ce09b4c RBP=000000000000000c RSP=ffff88806ce09a58 R8 =ffffffff860f0ee0 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000151c7 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88800ff9b680 R15=ffff88801473c180 RIP=ffffffff813ad4cf 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 00007f017e224900 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=00007fe8258d8650 CR3=000000000c57e000 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=392450b160613d812743146d6bc8d706 XMM02=ec2efd57dc4c00df0000000000121878 XMM03=1c9e8ba1147381cd0000000000121948 XMM04=ac003bac18c2973c00000000000ae988 XMM05=e94db748305e25920000000000139638 XMM06=bdf2e299e47b49d500000000001380b8 XMM07=fb795ef6d657705600000000001282b0 XMM08=2c67c8bc2e329bc300000000001218e8 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=00007ffdc17c4258 CR3=0000000005482000 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=00007f40f1ed0510000055feaf1f8790 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