syzkaller login: [ 31.718540] BUG: Bad rss-counter state mm:00000000e481cec6 type:MM_FILEPAGES val:33 [ 31.720018] BUG: Bad rss-counter state mm:00000000e481cec6 type:MM_ANONPAGES val:22 [ 31.863542] ================================================================== [ 31.864617] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.865757] Read of size 8 at addr ffff88801a3815c8 by task sshd/220 [ 31.866800] [ 31.867069] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.868113] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.869320] Call Trace: [ 31.869707] [ 31.870048] dump_stack_lvl+0x91/0xf0 [ 31.870642] print_report+0xcc/0x620 [ 31.871246] ? __virt_addr_valid+0x102/0x340 [ 31.871922] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.872685] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.873446] kasan_report+0xbe/0xf0 [ 31.874027] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.874814] vma_interval_tree_remove+0xc75/0xec0 [ 31.875555] vma_prepare+0xc54/0x11a0 [ 31.876144] __split_vma+0x5af/0x950 [ 31.876712] ? __pfx___split_vma+0x10/0x10 [ 31.877367] ? find_held_lock+0x2c/0x110 [ 31.877985] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.878678] ? lock_is_held_type+0x9f/0x120 [ 31.879339] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.880099] ? mtree_range_walk+0x632/0x900 [ 31.880786] ? mas_walk+0x5c7/0x7c0 [ 31.881372] do_vmi_munmap+0x1f1/0x2b0 [ 31.881969] mmap_region+0x1f9/0x2660 [ 31.882566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.883204] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.884080] ? __pfx_lock_acquire+0x10/0x10 [ 31.884722] ? __pfx_mmap_region+0x10/0x10 [ 31.885375] ? security_mmap_addr+0x7d/0xa0 [ 31.886032] ? get_unmapped_area+0x1f5/0x3f0 [ 31.886727] do_mmap+0x854/0xf00 [ 31.887259] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.887870] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.888562] ksys_mmap_pgoff+0x3af/0x500 [ 31.889170] do_syscall_64+0x3f/0x90 [ 31.889756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.890546] RIP: 0033:0x7f8cd23b4d82 [ 31.891122] 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 [ 31.893752] RSP: 002b:00007ffc1b58da08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.894887] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8cd23b4d82 [ 31.895943] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8cd17ee000 [ 31.896983] RBP: 00007f8cd17ee000 R08: 0000000000000009 R09: 0000000000001000 [ 31.898030] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4b2605980 [ 31.899070] R13: 00007ffc1b58da20 R14: 00007ffc1b58da50 R15: 00007ffc1b58ddb0 [ 31.900125] [ 31.900473] [ 31.900743] Allocated by task 213: [ 31.901263] kasan_save_stack+0x22/0x50 [ 31.901865] kasan_set_track+0x25/0x30 [ 31.902458] __kasan_slab_alloc+0x59/0x70 [ 31.903046] kmem_cache_alloc+0x16b/0x370 [ 31.903582] vm_area_dup+0x20/0x160 [ 31.904039] __split_vma+0x170/0x950 [ 31.904505] split_vma+0xc6/0x110 [ 31.904944] mprotect_fixup+0x8d2/0xb30 [ 31.905458] do_mprotect_pkey+0x87e/0xd40 [ 31.905989] __x64_sys_mprotect+0x78/0xc0 [ 31.906513] do_syscall_64+0x3f/0x90 [ 31.907014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.907660] [ 31.907884] Freed by task 213: [ 31.908277] kasan_save_stack+0x22/0x50 [ 31.908788] kasan_set_track+0x25/0x30 [ 31.909285] kasan_save_free_info+0x2b/0x50 [ 31.909819] __kasan_slab_free+0x10a/0x190 [ 31.910362] kmem_cache_free+0x10d/0x4d0 [ 31.910882] rcu_core+0x8c8/0x2860 [ 31.911327] __do_softirq+0x1b7/0x7d4 [ 31.911810] [ 31.912044] Last potentially related work creation: [ 31.912630] kasan_save_stack+0x22/0x50 [ 31.913139] __kasan_record_aux_stack+0x8e/0xa0 [ 31.913722] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.914371] remove_vma+0x139/0x170 [ 31.914831] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.915397] do_vmi_munmap+0x1f1/0x2b0 [ 31.915874] __vm_munmap+0x138/0x3a0 [ 31.916330] __x64_sys_munmap+0x59/0x80 [ 31.916828] do_syscall_64+0x3f/0x90 [ 31.917299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.917948] [ 31.918163] The buggy address belongs to the object at ffff88801a381570 [ 31.918163] which belongs to the cache vm_area_struct of size 168 [ 31.919658] The buggy address is located 88 bytes inside of [ 31.919658] freed 168-byte region [ffff88801a381570, ffff88801a381618) [ 31.921058] [ 31.921278] The buggy address belongs to the physical page: [ 31.921945] page:00000000b63bbc7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a381 [ 31.923044] memcg:ffff8880182db801 [ 31.923474] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.924124] page_type: 0xffffffff() [ 31.924581] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.925504] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182db801 [ 31.926417] page dumped because: kasan: bad access detected [ 31.927096] [ 31.927311] Memory state around the buggy address: [ 31.927899] ffff88801a381480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.928767] ffff88801a381500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.929624] >ffff88801a381580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.930479] ^ [ 31.931157] ffff88801a381600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.932009] ffff88801a381680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.932863] ================================================================== [ 31.933828] Disabling lock debugging due to kernel taint [ 34.145844] BUG: Bad rss-counter state mm:00000000b8352f66 type:MM_FILEPAGES val:33 [ 34.147201] BUG: Bad rss-counter state mm:00000000b8352f66 type:MM_ANONPAGES val:22 [ 34.688516] BUG: Bad rss-counter state mm:00000000e15dbe37 type:MM_FILEPAGES val:33 [ 34.689811] BUG: Bad rss-counter state mm:00000000e15dbe37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28258' (ECDSA) to the list of known hosts. 2023/06/21 00:55:45 fuzzer started 2023/06/21 00:55:46 dialing manager at localhost:36067 2023/06/21 00:55:46 checking machine... 2023/06/21 00:55:46 checking revisions... [ 35.418008] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:55:46 testing simple program... [ 35.464727] cgroup: Unknown subsys name 'net' [ 35.528486] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:55:45 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800ff02000 RCX=0000000000000000 RDX=ffff888019dd9b40 RSI=ffffffff83699f45 RDI=0000000000000005 RBP=ffff88800ff023e0 RSP=ffff8880093a7768 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800ff021b8 R13=ffff8880093a78a0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c086b RFL=00000293 [--S-A-C] 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 00007fc79ab24900 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=00007fc79b0db618 CR3=0000000015e50000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=00007f5dba604db0 CR3=000000000981e000 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=1119523c8debc3b79d44ef30403c79a1 XMM02=000000000011b810ec2efd57dc4c00df XMM03=0000000000122240b41d0fbae65f3d09 XMM04=e9e54e04b2a8d4be00000000000ae988 XMM05=19e9129bd510f2350000000000132078 XMM06=4fda316b135da52b0000000000131f00 XMM07=e042d86d42eb936e00000000001224c0 XMM08=b41d0fbae65f3d09000000000011b870 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000