syzkaller login: [ 28.933324] BUG: Bad rss-counter state mm:000000002134beb4 type:MM_FILEPAGES val:33 [ 28.934580] BUG: Bad rss-counter state mm:000000002134beb4 type:MM_ANONPAGES val:22 [ 28.976866] ================================================================== [ 28.977867] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.978788] Read of size 8 at addr ffff88800d5eb4e0 by task sshd/221 [ 28.979543] [ 28.979758] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.980611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.981601] Call Trace: [ 28.981917] [ 28.982197] dump_stack_lvl+0x91/0xf0 [ 28.982681] print_report+0xcc/0x620 [ 28.983158] ? __virt_addr_valid+0x102/0x340 [ 28.983709] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.984316] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.984923] kasan_report+0xbe/0xf0 [ 28.985412] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.986031] vma_interval_tree_remove+0xc75/0xec0 [ 28.986622] vma_prepare+0xc54/0x11a0 [ 28.987101] __split_vma+0x5af/0x950 [ 28.987566] ? __pfx___split_vma+0x10/0x10 [ 28.988091] ? find_held_lock+0x2c/0x110 [ 28.988613] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.989174] ? lock_is_held_type+0x9f/0x120 [ 28.989730] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.990331] ? mtree_range_walk+0x632/0x900 [ 28.990880] ? mas_walk+0x5c7/0x7c0 [ 28.991355] do_vmi_munmap+0x1f1/0x2b0 [ 28.991843] mmap_region+0x1f9/0x2660 [ 28.992325] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.992829] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.993550] ? __pfx_lock_acquire+0x10/0x10 [ 28.994078] ? __pfx_mmap_region+0x10/0x10 [ 28.994600] ? security_mmap_addr+0x7d/0xa0 [ 28.995125] ? get_unmapped_area+0x1f5/0x3f0 [ 28.995675] do_mmap+0x854/0xf00 [ 28.996105] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.996597] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.997152] ksys_mmap_pgoff+0x3af/0x500 [ 28.997672] do_syscall_64+0x3f/0x90 [ 28.998151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.998789] RIP: 0033:0x7fa1c1e7fd82 [ 28.999244] 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 [ 29.001384] RSP: 002b:00007ffd3f429c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.002280] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1c1e7fd82 [ 29.003125] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1c12b9000 [ 29.003972] RBP: 00007fa1c12b9000 R08: 0000000000000009 R09: 0000000000001000 [ 29.004810] R10: 0000000000000812 R11: 0000000000000206 R12: 00005577ce7f3ec0 [ 29.005669] R13: 00007ffd3f429c30 R14: 00007ffd3f429c60 R15: 00007ffd3f429fc0 [ 29.006526] [ 29.006817] [ 29.007032] Allocated by task 213: [ 29.007456] kasan_save_stack+0x22/0x50 [ 29.007952] kasan_set_track+0x25/0x30 [ 29.008439] __kasan_slab_alloc+0x59/0x70 [ 29.008968] kmem_cache_alloc+0x16b/0x370 [ 29.009487] vm_area_dup+0x20/0x160 [ 29.009942] __split_vma+0x170/0x950 [ 29.010406] split_vma+0xc6/0x110 [ 29.010840] mprotect_fixup+0x8d2/0xb30 [ 29.011342] do_mprotect_pkey+0x87e/0xd40 [ 29.011864] __x64_sys_mprotect+0x78/0xc0 [ 29.012380] do_syscall_64+0x3f/0x90 [ 29.012854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.013512] [ 29.013729] Freed by task 213: [ 29.014124] kasan_save_stack+0x22/0x50 [ 29.014630] kasan_set_track+0x25/0x30 [ 29.015115] kasan_save_free_info+0x2b/0x50 [ 29.015646] __kasan_slab_free+0x10a/0x190 [ 29.016178] kmem_cache_free+0x10d/0x4d0 [ 29.016679] rcu_core+0x8c8/0x2860 [ 29.017118] __do_softirq+0x1b7/0x7d4 [ 29.017610] [ 29.017827] Last potentially related work creation: [ 29.018401] kasan_save_stack+0x22/0x50 [ 29.018899] __kasan_record_aux_stack+0x8e/0xa0 [ 29.019472] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.020110] remove_vma+0x139/0x170 [ 29.020560] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.021113] do_vmi_munmap+0x1f1/0x2b0 [ 29.021602] __vm_munmap+0x138/0x3a0 [ 29.022065] __x64_sys_munmap+0x59/0x80 [ 29.022564] do_syscall_64+0x3f/0x90 [ 29.023034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.023670] [ 29.023886] Second to last potentially related work creation: [ 29.024569] kasan_save_stack+0x22/0x50 [ 29.025071] __kasan_record_aux_stack+0x8e/0xa0 [ 29.025654] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.026296] remove_vma+0x139/0x170 [ 29.026745] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.027302] do_vmi_munmap+0x1f1/0x2b0 [ 29.027782] mmap_region+0x1f9/0x2660 [ 29.028259] do_mmap+0x854/0xf00 [ 29.028688] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.029178] ksys_mmap_pgoff+0x3af/0x500 [ 29.029687] do_syscall_64+0x3f/0x90 [ 29.030164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.030811] [ 29.031022] The buggy address belongs to the object at ffff88800d5eb488 [ 29.031022] which belongs to the cache vm_area_struct of size 168 [ 29.032476] The buggy address is located 88 bytes inside of [ 29.032476] freed 168-byte region [ffff88800d5eb488, ffff88800d5eb530) [ 29.033881] [ 29.034096] The buggy address belongs to the physical page: [ 29.034763] page:0000000095378617 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5eb [ 29.035828] memcg:ffff88800ddb9401 [ 29.036251] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.036895] page_type: 0xffffffff() [ 29.037351] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393780 dead000000000004 [ 29.038260] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddb9401 [ 29.039157] page dumped because: kasan: bad access detected [ 29.039821] [ 29.040036] Memory state around the buggy address: [ 29.040648] ffff88800d5eb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.041523] ffff88800d5eb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.042409] >ffff88800d5eb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.043291] ^ [ 29.044067] ffff88800d5eb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 29.044959] ffff88800d5eb580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.045878] ================================================================== [ 29.047236] Disabling lock debugging due to kernel taint [ 31.074217] BUG: Bad rss-counter state mm:0000000046410304 type:MM_FILEPAGES val:33 [ 31.075447] BUG: Bad rss-counter state mm:0000000046410304 type:MM_ANONPAGES val:22 [ 31.531864] BUG: Bad rss-counter state mm:00000000a33ae109 type:MM_FILEPAGES val:33 [ 31.533037] BUG: Bad rss-counter state mm:00000000a33ae109 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15469' (ECDSA) to the list of known hosts. 2023/06/21 03:18:57 fuzzer started 2023/06/21 03:18:57 dialing manager at localhost:36067 2023/06/21 03:18:57 checking machine... 2023/06/21 03:18:57 checking revisions... [ 32.194449] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:18:57 testing simple program... [ 32.252041] cgroup: Unknown subsys name 'net' [ 32.295761] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:18:57 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=00007fc6df19abf0 CR3=000000000f24c000 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=c8e9ba7c4f2d7999754f7c1f14c05f89 XMM02=000000000011b3e0ec2efd57dc4c00df XMM03=00000000001219982b2ba74ea1f5d9a2 XMM04=e98cdcc7af9c62de00000000000ae988 XMM05=610d4cd3c99a814b0000000000134180 XMM06=c291bd5c70af25b90000000000133220 XMM07=e042d86d42eb936e0000000000121c70 XMM08=2b2ba74ea1f5d9a2000000000011b440 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88800ee29180 RCX=0000000000000000 RDX=ffff888015b58000 RSI=ffff88800ee29180 RDI=ffff8880192f2068 RBP=ffff8880192f2068 RSP=ffff888019c67938 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800ee29180 R13=ffff88800ee291d0 R14=0000000000000000 R15=1ffff1100338cf33 RIP=ffffffff814c086b RFL=00000206 [-----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 00007f404c651900 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=00007ffc12bce000 CR3=000000001945c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000