syzkaller login: [ 41.794849] BUG: Bad rss-counter state mm:000000003ca14777 type:MM_FILEPAGES val:33 [ 41.796440] BUG: Bad rss-counter state mm:000000003ca14777 type:MM_ANONPAGES val:22 [ 41.948750] ================================================================== [ 41.949759] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.950844] Read of size 8 at addr ffff88800efa1058 by task sshd/220 [ 41.951855] [ 41.952116] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.953057] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.954254] Call Trace: [ 41.954645] [ 41.954987] dump_stack_lvl+0x91/0xf0 [ 41.955599] print_report+0xcc/0x620 [ 41.956183] ? __virt_addr_valid+0x102/0x340 [ 41.956847] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.957601] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.958362] kasan_report+0xbe/0xf0 [ 41.958938] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.959707] vma_interval_tree_remove+0xc75/0xec0 [ 41.960437] vma_prepare+0xc54/0x11a0 [ 41.961019] __split_vma+0x5af/0x950 [ 41.961592] ? __pfx___split_vma+0x10/0x10 [ 41.962231] ? find_held_lock+0x2c/0x110 [ 41.962869] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.963584] ? lock_is_held_type+0x9f/0x120 [ 41.964243] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.964915] ? mtree_range_walk+0x632/0x900 [ 41.965517] ? mas_walk+0x5c7/0x7c0 [ 41.966041] do_vmi_munmap+0x1f1/0x2b0 [ 41.966580] mmap_region+0x1f9/0x2660 [ 41.967111] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.967681] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.968470] ? __pfx_lock_acquire+0x10/0x10 [ 41.969047] ? __pfx_mmap_region+0x10/0x10 [ 41.969632] ? security_mmap_addr+0x7d/0xa0 [ 41.970219] ? get_unmapped_area+0x1f5/0x3f0 [ 41.970818] do_mmap+0x854/0xf00 [ 41.971313] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.971857] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.972476] ksys_mmap_pgoff+0x3af/0x500 [ 41.973034] do_syscall_64+0x3f/0x90 [ 41.973557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.974264] RIP: 0033:0x7f54f7153d82 [ 41.974768] 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 [ 41.977162] RSP: 002b:00007ffdebacbe38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.978155] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54f7153d82 [ 41.979084] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54f658d000 [ 41.980022] RBP: 00007f54f658d000 R08: 0000000000000009 R09: 0000000000001000 [ 41.980959] R10: 0000000000000812 R11: 0000000000000206 R12: 000055598aee1ec0 [ 41.981895] R13: 00007ffdebacbe50 R14: 00007ffdebacbe80 R15: 00007ffdebacc1e0 [ 41.982840] [ 41.983160] [ 41.983408] Allocated by task 213: [ 41.983883] kasan_save_stack+0x22/0x50 [ 41.984431] kasan_set_track+0x25/0x30 [ 41.984978] __kasan_slab_alloc+0x59/0x70 [ 41.985558] kmem_cache_alloc+0x16b/0x370 [ 41.986119] vm_area_dup+0x20/0x160 [ 41.986618] __split_vma+0x170/0x950 [ 41.987130] split_vma+0xc6/0x110 [ 41.987634] mprotect_fixup+0x8d2/0xb30 [ 41.988191] do_mprotect_pkey+0x87e/0xd40 [ 41.988768] __x64_sys_mprotect+0x78/0xc0 [ 41.989344] do_syscall_64+0x3f/0x90 [ 41.989865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.990579] [ 41.990814] Freed by task 213: [ 41.991259] kasan_save_stack+0x22/0x50 [ 41.991818] kasan_set_track+0x25/0x30 [ 41.992363] kasan_save_free_info+0x2b/0x50 [ 41.993016] __kasan_slab_free+0x10a/0x190 [ 41.993606] kmem_cache_free+0x10d/0x4d0 [ 41.994167] rcu_core+0x8c8/0x2860 [ 41.994656] __do_softirq+0x1b7/0x7d4 [ 41.995180] [ 41.995440] Last potentially related work creation: [ 41.996092] kasan_save_stack+0x22/0x50 [ 41.996646] __kasan_record_aux_stack+0x8e/0xa0 [ 41.997272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.997978] remove_vma+0x139/0x170 [ 41.998476] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.999083] do_vmi_munmap+0x1f1/0x2b0 [ 41.999629] __vm_munmap+0x138/0x3a0 [ 42.000148] __x64_sys_munmap+0x59/0x80 [ 42.000693] do_syscall_64+0x3f/0x90 [ 42.001213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.001917] [ 42.002154] Second to last potentially related work creation: [ 42.002911] kasan_save_stack+0x22/0x50 [ 42.003477] __kasan_record_aux_stack+0x8e/0xa0 [ 42.004107] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.004824] remove_vma+0x139/0x170 [ 42.005323] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.005945] do_vmi_munmap+0x1f1/0x2b0 [ 42.006479] mmap_region+0x1f9/0x2660 [ 42.007006] do_mmap+0x854/0xf00 [ 42.007505] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.008051] ksys_mmap_pgoff+0x3af/0x500 [ 42.008603] do_syscall_64+0x3f/0x90 [ 42.009124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.009833] [ 42.010070] The buggy address belongs to the object at ffff88800efa1000 [ 42.010070] which belongs to the cache vm_area_struct of size 168 [ 42.011705] The buggy address is located 88 bytes inside of [ 42.011705] freed 168-byte region [ffff88800efa1000, ffff88800efa10a8) [ 42.013204] [ 42.013422] The buggy address belongs to the physical page: [ 42.014104] page:00000000fdd469c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefa1 [ 42.015214] memcg:ffff88800ed9cf01 [ 42.015673] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.016343] page_type: 0xffffffff() [ 42.016800] raw: 0100000000000200 ffff88800879fc80 ffffea00003b0040 dead000000000008 [ 42.017744] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed9cf01 [ 42.018678] page dumped because: kasan: bad access detected [ 42.019389] [ 42.019634] Memory state around the buggy address: [ 42.020294] ffff88800efa0f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 42.021278] ffff88800efa0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 42.022262] >ffff88800efa1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.023254] ^ [ 42.024091] ffff88800efa1080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 42.025070] ffff88800efa1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.026053] ================================================================== [ 42.027295] Disabling lock debugging due to kernel taint [ 44.899612] BUG: Bad rss-counter state mm:00000000c354a6fd type:MM_FILEPAGES val:33 [ 44.900516] BUG: Bad rss-counter state mm:00000000c354a6fd type:MM_ANONPAGES val:22 [ 45.381337] BUG: Bad rss-counter state mm:00000000892cdda9 type:MM_FILEPAGES val:33 [ 45.382661] BUG: Bad rss-counter state mm:00000000892cdda9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60669' (ECDSA) to the list of known hosts. 2023/06/19 20:57:56 fuzzer started 2023/06/19 20:57:57 dialing manager at localhost:44161 2023/06/19 20:57:57 checking machine... 2023/06/19 20:57:57 checking revisions... [ 46.144850] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:57:57 testing simple program... [ 46.184364] cgroup: Unknown subsys name 'net' [ 46.233934] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:57:53 Registers: info registers vcpu 0 RAX=ffffed100d9c1329 RBX=1ffff1100d9c1329 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e7d RFL=00000282 [--S----] 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 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=00007f93ec70d0c0 CR3=0000000015e28000 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=2036353a37353a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a37353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000f0ac8125 RCX=ffff88806ca40928 RDX=0000000000000012 RSI=0000000000000003 RDI=0000000081601974 RBP=ffff888010be3440 RSP=ffff888016aaf3c8 R8 =0000000062304e3a R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092800 R14=ffff888016aaf430 R15=0000000000000012 RIP=ffffffff82270f13 RFL=00000202 [-------] 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 00007f65b7d5a900 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=00007f65b7d29008 CR3=000000000e396000 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=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