syzkaller login: [ 61.564883] BUG: Bad rss-counter state mm:00000000d171d54f type:MM_FILEPAGES val:33 [ 61.566380] BUG: Bad rss-counter state mm:00000000d171d54f type:MM_ANONPAGES val:22 [ 61.725014] ================================================================== [ 61.725935] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.726879] Read of size 8 at addr ffff88800ebe75c8 by task sshd/221 [ 61.727762] [ 61.727980] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.728838] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.729852] Call Trace: [ 61.730170] [ 61.730452] dump_stack_lvl+0x91/0xf0 [ 61.730945] print_report+0xcc/0x620 [ 61.731425] ? __virt_addr_valid+0x102/0x340 [ 61.731981] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.732594] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.733215] kasan_report+0xbe/0xf0 [ 61.733693] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.734314] vma_interval_tree_remove+0xc75/0xec0 [ 61.734911] vma_prepare+0xc54/0x11a0 [ 61.735390] __split_vma+0x5af/0x950 [ 61.735878] ? __pfx___split_vma+0x10/0x10 [ 61.736407] ? find_held_lock+0x2c/0x110 [ 61.736927] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.737495] ? lock_is_held_type+0x9f/0x120 [ 61.738046] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.738654] ? mtree_range_walk+0x632/0x900 [ 61.739211] ? mas_walk+0x5c7/0x7c0 [ 61.739692] do_vmi_munmap+0x1f1/0x2b0 [ 61.740192] mmap_region+0x1f9/0x2660 [ 61.740670] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.741203] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.741921] ? __pfx_lock_acquire+0x10/0x10 [ 61.742453] ? __pfx_mmap_region+0x10/0x10 [ 61.742991] ? security_mmap_addr+0x7d/0xa0 [ 61.743526] ? get_unmapped_area+0x1f5/0x3f0 [ 61.744072] do_mmap+0x854/0xf00 [ 61.744513] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.745004] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.745574] ksys_mmap_pgoff+0x3af/0x500 [ 61.746088] do_syscall_64+0x3f/0x90 [ 61.746563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.747213] RIP: 0033:0x7f406dec3d82 [ 61.747668] 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 [ 61.749801] RSP: 002b:00007ffc9d56d868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.750703] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f406dec3d82 [ 61.751543] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f406d2fd000 [ 61.752381] RBP: 00007f406d2fd000 R08: 0000000000000009 R09: 0000000000001000 [ 61.753272] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8ec8fd980 [ 61.754124] R13: 00007ffc9d56d880 R14: 00007ffc9d56d8b0 R15: 00007ffc9d56dc10 [ 61.754983] [ 61.755275] [ 61.755490] Allocated by task 214: [ 61.755920] kasan_save_stack+0x22/0x50 [ 61.756426] kasan_set_track+0x25/0x30 [ 61.756918] __kasan_slab_alloc+0x59/0x70 [ 61.757450] kmem_cache_alloc+0x16b/0x370 [ 61.757970] vm_area_dup+0x20/0x160 [ 61.758423] __split_vma+0x170/0x950 [ 61.758893] split_vma+0xc6/0x110 [ 61.759330] mprotect_fixup+0x8d2/0xb30 [ 61.759874] do_mprotect_pkey+0x87e/0xd40 [ 61.760400] __x64_sys_mprotect+0x78/0xc0 [ 61.760932] do_syscall_64+0x3f/0x90 [ 61.761422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.762059] [ 61.762274] Freed by task 211: [ 61.762666] kasan_save_stack+0x22/0x50 [ 61.763172] kasan_set_track+0x25/0x30 [ 61.763664] kasan_save_free_info+0x2b/0x50 [ 61.764198] __kasan_slab_free+0x10a/0x190 [ 61.764727] kmem_cache_free+0x10d/0x4d0 [ 61.765238] rcu_core+0x8c8/0x2860 [ 61.765677] __do_softirq+0x1b7/0x7d4 [ 61.766158] [ 61.766371] Last potentially related work creation: [ 61.766961] kasan_save_stack+0x22/0x50 [ 61.767463] __kasan_record_aux_stack+0x8e/0xa0 [ 61.768033] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.768688] remove_vma+0x139/0x170 [ 61.769151] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.769708] do_vmi_munmap+0x1f1/0x2b0 [ 61.770194] __vm_munmap+0x138/0x3a0 [ 61.770661] __x64_sys_munmap+0x59/0x80 [ 61.771161] do_syscall_64+0x3f/0x90 [ 61.771633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.772275] [ 61.772490] The buggy address belongs to the object at ffff88800ebe7570 [ 61.772490] which belongs to the cache vm_area_struct of size 168 [ 61.773980] The buggy address is located 88 bytes inside of [ 61.773980] freed 168-byte region [ffff88800ebe7570, ffff88800ebe7618) [ 61.775388] [ 61.775605] The buggy address belongs to the physical page: [ 61.776273] page:00000000341518ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebe7 [ 61.777374] memcg:ffff88801a15cb01 [ 61.777806] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.778452] page_type: 0xffffffff() [ 61.778911] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.779834] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a15cb01 [ 61.780762] page dumped because: kasan: bad access detected [ 61.781433] [ 61.781647] Memory state around the buggy address: [ 61.782275] ffff88800ebe7480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.783128] ffff88800ebe7500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 61.783982] >ffff88800ebe7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.784830] ^ [ 61.785505] ffff88800ebe7600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 61.786351] ffff88800ebe7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.787204] ================================================================== [ 61.788229] Disabling lock debugging due to kernel taint [ 63.687850] BUG: Bad rss-counter state mm:0000000013265e98 type:MM_FILEPAGES val:33 [ 63.688770] BUG: Bad rss-counter state mm:0000000013265e98 type:MM_ANONPAGES val:22 [ 64.250487] BUG: Bad rss-counter state mm:000000004b805b1c type:MM_FILEPAGES val:33 [ 64.251845] BUG: Bad rss-counter state mm:000000004b805b1c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15366' (ECDSA) to the list of known hosts. 2023/06/21 00:17:48 fuzzer started 2023/06/21 00:17:48 dialing manager at localhost:36067 2023/06/21 00:17:49 checking machine... 2023/06/21 00:17:49 checking revisions... [ 64.972710] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:17:49 testing simple program... [ 65.025586] cgroup: Unknown subsys name 'net' [ 65.069840] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:17:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800dadc000 RCX=ffff8880087b3dc8 RDX=0000000000000000 RSI=ffff88800d756c80 RDI=ffff8880087b3d80 RBP=ffff88800dbdfc68 RSP=ffff88800dbdfbe0 R8 =00000000000c0005 R9 =ffffed1001b7bf6a R10=0000000000000003 R11=00000000000c000b R12=ffff8880087b8780 R13=ffff8880087b3d80 R14=ffffea000035d580 R15=00000000800c0005 RIP=ffffffff81805e05 RFL=00000046 [---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 00007f6448ba0900 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=00007f6447fd0b60 CR3=000000000c4f8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=dc0e3d9d81b69e9300000000000ae988 XMM05=e6a2aceb6852f03b00000000001328b8 XMM06=d847e6ef45da2a500000000000131960 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c272c4 RBX=0000000000000001 RCX=ffffffff8613961e RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88801a24f3f8 RBP=ffff88801a24f3e8 RSP=ffff88801a24f320 R8 =ffffffff86139622 R9 =ffff88801a24f3d0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88801a24f3f0 R13=ffff88801a24f3d8 R14=ffff88801a24f700 R15=ffff88801a24f390 RIP=ffffffff81131118 RFL=00000212 [----A--] 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 00007fdc588cc900 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=00007fdc58e83618 CR3=000000000de7c000 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=37313a3030203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383734 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000