syzkaller login: [ 61.937483] BUG: Bad rss-counter state mm:000000004f08e31d type:MM_FILEPAGES val:33 [ 61.938476] BUG: Bad rss-counter state mm:000000004f08e31d type:MM_ANONPAGES val:22 [ 61.979061] ================================================================== [ 61.980528] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.982140] Read of size 8 at addr ffff88800d87ea50 by task sshd/222 [ 61.983360] [ 61.983628] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.984850] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.986222] Call Trace: [ 61.986704] [ 61.987159] dump_stack_lvl+0x91/0xf0 [ 61.987753] print_report+0xcc/0x620 [ 61.988347] ? __virt_addr_valid+0x102/0x340 [ 61.989015] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.989777] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.990549] kasan_report+0xbe/0xf0 [ 61.991125] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.991875] vma_interval_tree_remove+0xc75/0xec0 [ 61.992653] vma_prepare+0xc54/0x11a0 [ 61.993239] __split_vma+0x5af/0x950 [ 61.993811] ? __pfx___split_vma+0x10/0x10 [ 61.994453] ? find_held_lock+0x2c/0x110 [ 61.995086] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.995775] ? lock_is_held_type+0x9f/0x120 [ 61.996446] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.997187] ? mtree_range_walk+0x632/0x900 [ 61.997865] ? mas_walk+0x5c7/0x7c0 [ 61.998440] do_vmi_munmap+0x1f1/0x2b0 [ 61.999048] mmap_region+0x1f9/0x2660 [ 61.999632] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.000260] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.001140] ? __pfx_lock_acquire+0x10/0x10 [ 62.001798] ? __pfx_mmap_region+0x10/0x10 [ 62.002449] ? security_mmap_addr+0x7d/0xa0 [ 62.003112] ? get_unmapped_area+0x1f5/0x3f0 [ 62.003788] do_mmap+0x854/0xf00 [ 62.004315] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.004811] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.005375] ksys_mmap_pgoff+0x3af/0x500 [ 62.005882] do_syscall_64+0x3f/0x90 [ 62.006367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.007010] RIP: 0033:0x7fd9f3e85d82 [ 62.007469] 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 [ 62.009630] RSP: 002b:00007ffdb1309e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.010526] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9f3e85d82 [ 62.011385] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9f32bf000 [ 62.012253] RBP: 00007fd9f32bf000 R08: 0000000000000009 R09: 0000000000001000 [ 62.013114] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565053157ec0 [ 62.013966] R13: 00007ffdb1309eb0 R14: 00007ffdb1309ee0 R15: 00007ffdb130a240 [ 62.014834] [ 62.015130] [ 62.015344] Allocated by task 215: [ 62.015779] kasan_save_stack+0x22/0x50 [ 62.016305] kasan_set_track+0x25/0x30 [ 62.016800] __kasan_slab_alloc+0x59/0x70 [ 62.017329] kmem_cache_alloc+0x16b/0x370 [ 62.017842] vm_area_dup+0x20/0x160 [ 62.018300] __split_vma+0x170/0x950 [ 62.018763] split_vma+0xc6/0x110 [ 62.019206] mprotect_fixup+0x8d2/0xb30 [ 62.019710] do_mprotect_pkey+0x87e/0xd40 [ 62.020233] __x64_sys_mprotect+0x78/0xc0 [ 62.020741] do_syscall_64+0x3f/0x90 [ 62.021216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.021855] [ 62.022072] Freed by task 215: [ 62.022456] kasan_save_stack+0x22/0x50 [ 62.023035] kasan_set_track+0x25/0x30 [ 62.023533] kasan_save_free_info+0x2b/0x50 [ 62.024075] __kasan_slab_free+0x10a/0x190 [ 62.024635] kmem_cache_free+0x10d/0x4d0 [ 62.025150] rcu_core+0x8c8/0x2860 [ 62.025599] __do_softirq+0x1b7/0x7d4 [ 62.026076] [ 62.026288] Last potentially related work creation: [ 62.026876] kasan_save_stack+0x22/0x50 [ 62.027387] __kasan_record_aux_stack+0x8e/0xa0 [ 62.027956] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.028693] remove_vma+0x139/0x170 [ 62.029165] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.029734] do_vmi_munmap+0x1f1/0x2b0 [ 62.030238] __vm_munmap+0x138/0x3a0 [ 62.030713] __x64_sys_munmap+0x59/0x80 [ 62.031212] do_syscall_64+0x3f/0x90 [ 62.031663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.032273] [ 62.032488] The buggy address belongs to the object at ffff88800d87e9f8 [ 62.032488] which belongs to the cache vm_area_struct of size 168 [ 62.033972] The buggy address is located 88 bytes inside of [ 62.033972] freed 168-byte region [ffff88800d87e9f8, ffff88800d87eaa0) [ 62.035413] [ 62.035629] The buggy address belongs to the physical page: [ 62.036311] page:000000001d307b76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd87e [ 62.037385] memcg:ffff88800dd05201 [ 62.037810] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.038452] page_type: 0xffffffff() [ 62.038912] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 62.039824] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd05201 [ 62.040741] page dumped because: kasan: bad access detected [ 62.041411] [ 62.041632] Memory state around the buggy address: [ 62.042210] ffff88800d87e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.043061] ffff88800d87e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 62.043918] >ffff88800d87ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.044778] ^ [ 62.045479] ffff88800d87ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 62.046340] ffff88800d87eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.047220] ================================================================== [ 62.048249] Disabling lock debugging due to kernel taint [ 63.975345] BUG: Bad rss-counter state mm:0000000054f249aa type:MM_FILEPAGES val:33 [ 63.976524] BUG: Bad rss-counter state mm:0000000054f249aa type:MM_ANONPAGES val:22 [ 64.413675] BUG: Bad rss-counter state mm:00000000ff96327c type:MM_FILEPAGES val:33 [ 64.415277] BUG: Bad rss-counter state mm:00000000ff96327c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56576' (ECDSA) to the list of known hosts. 2023/06/20 15:17:46 fuzzer started 2023/06/20 15:17:47 dialing manager at localhost:36067 2023/06/20 15:17:47 checking machine... 2023/06/20 15:17:47 checking revisions... [ 65.185499] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:17:47 testing simple program... [ 65.229493] cgroup: Unknown subsys name 'net' [ 65.280334] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:17:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=00000000800d000d RDX=00000000800d000c RSI=ffffffff81806deb RDI=0000000000000000 RBP=ffff88800fec7c60 RSP=ffff88800fec7ba0 R8 =00000000800d000d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff88800844f780 R13=ffff88800e70b390 R14=ffffea000039c2c0 R15=ffff88806ce3de00 RIP=ffffffff81807426 RFL=00000082 [--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 00007f4331b8b900 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=00007ffc9392f000 CR3=000000001a09e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=ffff888008c04400 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=00007f08a3f99750 CR3=000000000dfd6000 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=2036343a37313a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a37313a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000