syzkaller login: [ 32.010006] BUG: Bad rss-counter state mm:000000002cf002bd type:MM_FILEPAGES val:33 [ 32.011148] BUG: Bad rss-counter state mm:000000002cf002bd type:MM_ANONPAGES val:22 [ 32.171753] ================================================================== [ 32.172626] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.173511] Read of size 8 at addr ffff88800dfddd08 by task sshd/218 [ 32.174232] [ 32.174443] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.175464] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.176374] Call Trace: [ 32.176679] [ 32.176968] dump_stack_lvl+0x91/0xf0 [ 32.177445] print_report+0xcc/0x620 [ 32.177904] ? __virt_addr_valid+0x102/0x340 [ 32.178429] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.179009] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.179598] kasan_report+0xbe/0xf0 [ 32.180046] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.180630] vma_interval_tree_remove+0xc75/0xec0 [ 32.181202] vma_prepare+0xc54/0x11a0 [ 32.181714] __split_vma+0x5af/0x950 [ 32.182261] ? __pfx___split_vma+0x10/0x10 [ 32.182883] ? find_held_lock+0x2c/0x110 [ 32.183489] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.184147] ? lock_is_held_type+0x9f/0x120 [ 32.184775] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.185499] ? mtree_range_walk+0x632/0x900 [ 32.186136] ? mas_walk+0x5c7/0x7c0 [ 32.186688] do_vmi_munmap+0x1f1/0x2b0 [ 32.187258] mmap_region+0x1f9/0x2660 [ 32.187820] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.188416] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.189256] ? __pfx_lock_acquire+0x10/0x10 [ 32.189878] ? __pfx_mmap_region+0x10/0x10 [ 32.190496] ? security_mmap_addr+0x7d/0xa0 [ 32.191113] ? get_unmapped_area+0x1f5/0x3f0 [ 32.191758] do_mmap+0x854/0xf00 [ 32.192268] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.192853] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.193506] ksys_mmap_pgoff+0x3af/0x500 [ 32.194095] do_syscall_64+0x3f/0x90 [ 32.194652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.195401] RIP: 0033:0x7f56718add82 [ 32.195931] 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 [ 32.198438] RSP: 002b:00007fff35ea1bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.199491] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56718add82 [ 32.200484] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5670ce7000 [ 32.201483] RBP: 00007f5670ce7000 R08: 0000000000000009 R09: 0000000000001000 [ 32.202478] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c25710a980 [ 32.203465] R13: 00007fff35ea1bf0 R14: 00007fff35ea1c20 R15: 00007fff35ea1f80 [ 32.204467] [ 32.204824] [ 32.205078] Allocated by task 211: [ 32.205577] kasan_save_stack+0x22/0x50 [ 32.206165] kasan_set_track+0x25/0x30 [ 32.206745] __kasan_slab_alloc+0x59/0x70 [ 32.207355] kmem_cache_alloc+0x16b/0x370 [ 32.207959] vm_area_dup+0x20/0x160 [ 32.208484] __split_vma+0x170/0x950 [ 32.209041] split_vma+0xc6/0x110 [ 32.209554] mprotect_fixup+0x8d2/0xb30 [ 32.210136] do_mprotect_pkey+0x87e/0xd40 [ 32.210745] __x64_sys_mprotect+0x78/0xc0 [ 32.211352] do_syscall_64+0x3f/0x90 [ 32.211898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.212641] [ 32.212908] Freed by task 211: [ 32.213364] kasan_save_stack+0x22/0x50 [ 32.213951] kasan_set_track+0x25/0x30 [ 32.214522] kasan_save_free_info+0x2b/0x50 [ 32.215137] __kasan_slab_free+0x10a/0x190 [ 32.215816] kmem_cache_free+0x10d/0x4d0 [ 32.216406] rcu_core+0x8c8/0x2860 [ 32.216930] __do_softirq+0x1b7/0x7d4 [ 32.217485] [ 32.217735] Last potentially related work creation: [ 32.218418] kasan_save_stack+0x22/0x50 [ 32.219000] __kasan_record_aux_stack+0x8e/0xa0 [ 32.219664] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.220408] remove_vma+0x139/0x170 [ 32.221035] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.221691] do_vmi_munmap+0x1f1/0x2b0 [ 32.222255] __vm_munmap+0x138/0x3a0 [ 32.222801] __x64_sys_munmap+0x59/0x80 [ 32.223377] do_syscall_64+0x3f/0x90 [ 32.223924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.224669] [ 32.224928] Second to last potentially related work creation: [ 32.225728] kasan_save_stack+0x22/0x50 [ 32.226318] __kasan_record_aux_stack+0x8e/0xa0 [ 32.226981] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.227727] remove_vma+0x139/0x170 [ 32.228256] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.228913] do_vmi_munmap+0x1f1/0x2b0 [ 32.229475] mmap_region+0x1f9/0x2660 [ 32.230024] do_mmap+0x854/0xf00 [ 32.230523] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.231090] ksys_mmap_pgoff+0x3af/0x500 [ 32.231673] do_syscall_64+0x3f/0x90 [ 32.232224] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.232997] [ 32.233246] The buggy address belongs to the object at ffff88800dfddcb0 [ 32.233246] which belongs to the cache vm_area_struct of size 168 [ 32.234966] The buggy address is located 88 bytes inside of [ 32.234966] freed 168-byte region [ffff88800dfddcb0, ffff88800dfddd58) [ 32.236596] [ 32.236850] The buggy address belongs to the physical page: [ 32.237622] page:000000009018ccd0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfdd [ 32.238882] memcg:ffff88800e3c5c01 [ 32.239378] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.240133] page_type: 0xffffffff() [ 32.240655] raw: 0100000000000200 ffff88800879fc80 ffffea000031d6c0 dead000000000008 [ 32.241751] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3c5c01 [ 32.242811] page dumped because: kasan: bad access detected [ 32.243582] [ 32.243831] Memory state around the buggy address: [ 32.244508] ffff88800dfddc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.245521] ffff88800dfddc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.246521] >ffff88800dfddd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.247508] ^ [ 32.248015] ffff88800dfddd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.249018] ffff88800dfdde00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.250015] ================================================================== [ 32.251231] Disabling lock debugging due to kernel taint [ 34.418504] BUG: Bad rss-counter state mm:00000000cb3af4f3 type:MM_FILEPAGES val:33 [ 34.420053] BUG: Bad rss-counter state mm:00000000cb3af4f3 type:MM_ANONPAGES val:22 [ 34.901349] BUG: Bad rss-counter state mm:000000002e3a665f type:MM_FILEPAGES val:33 [ 34.902610] BUG: Bad rss-counter state mm:000000002e3a665f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21984' (ECDSA) to the list of known hosts. 2023/06/19 19:34:35 fuzzer started 2023/06/19 19:34:35 dialing manager at localhost:44161 2023/06/19 19:34:35 checking machine... 2023/06/19 19:34:35 checking revisions... [ 35.669678] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:34:35 testing simple program... [ 35.716945] cgroup: Unknown subsys name 'net' [ 35.769876] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:34:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f0bb994c477 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007f0bb994c477 RSP=ffff88806ce09a20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88806ce09b38 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff888019e1db00 RIP=ffffffff814c8520 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 00007f0bb9459900 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=00007ffc01507000 CR3=000000000e580000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=ffff888008c58400 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=00007f9d1d0fd740 CR3=0000000009a0c000 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=22550b6906d145b0ee4805881799e1fa XMM02=000000000011ddc8eff9b2d0a8fce9cb XMM03=000000000011de982c67c8bc2e329bc3 XMM04=9c72751baee2150100000000000ae988 XMM05=40c452994aac78110000000000135dd0 XMM06=bdf2e299e47b49d50000000000134b00 XMM07=e042d86d42eb936e00000000001242c0 XMM08=a0c60e2d2e6168c7000000000011de98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000