syzkaller login: [ 149.633646] BUG: Bad rss-counter state mm:00000000f5c07a06 type:MM_FILEPAGES val:33 [ 149.634848] BUG: Bad rss-counter state mm:00000000f5c07a06 type:MM_ANONPAGES val:22 [ 149.681469] ================================================================== [ 149.682424] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 149.683386] Read of size 8 at addr ffff888018c3fed8 by task sshd/225 [ 149.684183] [ 149.684401] CPU: 0 PID: 225 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 149.685442] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 149.686425] Call Trace: [ 149.686745] <TASK> [ 149.687030] dump_stack_lvl+0x91/0xf0 [ 149.687522] print_report+0xcc/0x620 [ 149.688023] ? __virt_addr_valid+0x102/0x340 [ 149.688576] ? vma_interval_tree_remove+0xc75/0xec0 [ 149.689197] ? vma_interval_tree_remove+0xc75/0xec0 [ 149.689817] kasan_report+0xbe/0xf0 [ 149.690293] ? vma_interval_tree_remove+0xc75/0xec0 [ 149.690918] vma_interval_tree_remove+0xc75/0xec0 [ 149.691529] vma_prepare+0xc54/0x11a0 [ 149.692027] __split_vma+0x5af/0x950 [ 149.692512] ? __pfx___split_vma+0x10/0x10 [ 149.693163] ? find_held_lock+0x2c/0x110 [ 149.693690] do_vmi_align_munmap+0x2ba/0x11f0 [ 149.694250] ? lock_is_held_type+0x9f/0x120 [ 149.694789] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 149.695409] ? mtree_range_walk+0x632/0x900 [ 149.695974] ? mas_walk+0x5c7/0x7c0 [ 149.696453] do_vmi_munmap+0x1f1/0x2b0 [ 149.696948] mmap_region+0x1f9/0x2660 [ 149.697440] ? vm_mmap_pgoff+0x15c/0x3a0 [ 149.697954] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 149.698672] ? __pfx_lock_acquire+0x10/0x10 [ 149.699215] ? __pfx_mmap_region+0x10/0x10 [ 149.699767] ? security_mmap_addr+0x7d/0xa0 [ 149.700339] ? get_unmapped_area+0x1f5/0x3f0 [ 149.700905] do_mmap+0x854/0xf00 [ 149.701363] vm_mmap_pgoff+0x1a6/0x3a0 [ 149.701874] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 149.702447] ksys_mmap_pgoff+0x3af/0x500 [ 149.702978] do_syscall_64+0x3f/0x90 [ 149.703473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 149.704156] RIP: 0033:0x7fabcc020d82 [ 149.704632] 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 [ 149.706850] RSP: 002b:00007fffdf3e9c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 149.707793] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fabcc020d82 [ 149.708698] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fabcb45a000 [ 149.709585] RBP: 00007fabcb45a000 R08: 0000000000000009 R09: 0000000000001000 [ 149.710467] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f34423aec0 [ 149.711347] R13: 00007fffdf3e9c30 R14: 00007fffdf3e9c60 R15: 00007fffdf3e9fc0 [ 149.712250] </TASK> [ 149.712558] [ 149.712779] Allocated by task 218: [ 149.713224] kasan_save_stack+0x22/0x50 [ 149.713753] kasan_set_track+0x25/0x30 [ 149.714274] __kasan_slab_alloc+0x59/0x70 [ 149.714819] kmem_cache_alloc+0x16b/0x370 [ 149.715354] vm_area_dup+0x20/0x160 [ 149.715826] __split_vma+0x170/0x950 [ 149.716325] split_vma+0xc6/0x110 [ 149.716784] mprotect_fixup+0x8d2/0xb30 [ 149.717313] do_mprotect_pkey+0x87e/0xd40 [ 149.717856] __x64_sys_mprotect+0x78/0xc0 [ 149.718396] do_syscall_64+0x3f/0x90 [ 149.718886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 149.719555] [ 149.719777] Freed by task 218: [ 149.720195] kasan_save_stack+0x22/0x50 [ 149.720720] kasan_set_track+0x25/0x30 [ 149.721232] kasan_save_free_info+0x2b/0x50 [ 149.721784] __kasan_slab_free+0x10a/0x190 [ 149.722337] kmem_cache_free+0x10d/0x4d0 [ 149.722865] rcu_core+0x8c8/0x2860 [ 149.723322] __do_softirq+0x1b7/0x7d4 [ 149.723815] [ 149.724051] Last potentially related work creation: [ 149.724669] kasan_save_stack+0x22/0x50 [ 149.725197] __kasan_record_aux_stack+0x8e/0xa0 [ 149.725796] __call_rcu_common.constprop.0+0x6a/0xb90 [ 149.726462] remove_vma+0x139/0x170 [ 149.726941] do_vmi_align_munmap+0xd4a/0x11f0 [ 149.727522] do_vmi_munmap+0x1f1/0x2b0 [ 149.728049] __vm_munmap+0x138/0x3a0 [ 149.728540] __x64_sys_munmap+0x59/0x80 [ 149.729062] do_syscall_64+0x3f/0x90 [ 149.729556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 149.730227] [ 149.730450] The buggy address belongs to the object at ffff888018c3fe80 [ 149.730450] which belongs to the cache vm_area_struct of size 168 [ 149.732001] The buggy address is located 88 bytes inside of [ 149.732001] freed 168-byte region [ffff888018c3fe80, ffff888018c3ff28) [ 149.733471] [ 149.733696] The buggy address belongs to the physical page: [ 149.734380] page:000000003420ffcc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c3f [ 149.735531] memcg:ffff8880146d2701 [ 149.736001] flags: 0x100000000000200(slab|node=0|zone=1) [ 149.736680] page_type: 0xffffffff() [ 149.737148] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 149.738105] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146d2701 [ 149.739050] page dumped because: kasan: bad access detected [ 149.739733] [ 149.739963] Memory state around the buggy address: [ 149.740573] ffff888018c3fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 149.741461] ffff888018c3fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 149.742357] >ffff888018c3fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 149.743240] ^ [ 149.744010] ffff888018c3ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 149.744909] ffff888018c3ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 149.745790] ================================================================== [ 149.746856] Disabling lock debugging due to kernel taint [ 151.725465] BUG: Bad rss-counter state mm:00000000a50d26f4 type:MM_FILEPAGES val:33 [ 151.726631] BUG: Bad rss-counter state mm:00000000a50d26f4 type:MM_ANONPAGES val:22 [ 152.100843] BUG: Bad rss-counter state mm:00000000d0ffb31e type:MM_FILEPAGES val:33 [ 152.101832] BUG: Bad rss-counter state mm:00000000d0ffb31e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6001' (ECDSA) to the list of known hosts. 2023/06/20 05:11:50 fuzzer started 2023/06/20 05:11:50 dialing manager at localhost:44161 2023/06/20 05:11:50 checking machine... 2023/06/20 05:11:50 checking revisions... [ 152.868224] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:11:50 testing simple program... [ 152.920695] cgroup: Unknown subsys name 'net' [ 152.970555] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:09:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fb0ee756220 CR3=0000000016bc4000 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=2039343a31313a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a31313a3530203032 XMM08=00007fd1cc0338100000004a00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002bb0f7b RBX=ffff888015d87c28 RCX=ffff888015d87c30 RDX=ffff888015d88000 RSI=ffff888015d87c28 RDI=ffff888015d87ba0 RBP=dffffc0000000000 RSP=ffff888015d87b40 R8 =0000000000000001 R9 =ffff888015d87bd0 R10=0000000000038001 R11=0000000000003c0d R12=ffffed1002bb0f74 R13=ffffed1002bb0f73 R14=ffff888015d87bd8 R15=ffff888015d87b90 RIP=ffffffff81132ff0 RFL=00000287 [--S--PC] 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 00007f06af53d900 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=00007f06af909328 CR3=000000000efd0000 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