syzkaller login: [ 30.687678] BUG: Bad rss-counter state mm:000000006751babc type:MM_FILEPAGES val:33 [ 30.688692] BUG: Bad rss-counter state mm:000000006751babc type:MM_ANONPAGES val:22 [ 30.859393] ================================================================== [ 30.860480] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.861771] Read of size 8 at addr ffff8880164a3df0 by task sshd/221 [ 30.862689] [ 30.862948] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.863994] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.864973] Call Trace: [ 30.865308] [ 30.865591] dump_stack_lvl+0x91/0xf0 [ 30.866088] print_report+0xcc/0x620 [ 30.866570] ? __virt_addr_valid+0x102/0x340 [ 30.867150] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.867781] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.868422] kasan_report+0xbe/0xf0 [ 30.868898] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.869526] vma_interval_tree_remove+0xc75/0xec0 [ 30.870133] vma_prepare+0xc54/0x11a0 [ 30.870607] __split_vma+0x5af/0x950 [ 30.871078] ? __pfx___split_vma+0x10/0x10 [ 30.871604] ? find_held_lock+0x2c/0x110 [ 30.872126] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.872691] ? lock_is_held_type+0x9f/0x120 [ 30.873245] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.873857] ? mtree_range_walk+0x632/0x900 [ 30.874411] ? mas_walk+0x5c7/0x7c0 [ 30.874885] do_vmi_munmap+0x1f1/0x2b0 [ 30.875385] mmap_region+0x1f9/0x2660 [ 30.875863] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.876374] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.877089] ? __pfx_lock_acquire+0x10/0x10 [ 30.877631] ? __pfx_mmap_region+0x10/0x10 [ 30.878161] ? security_mmap_addr+0x7d/0xa0 [ 30.878698] ? get_unmapped_area+0x1f5/0x3f0 [ 30.879251] do_mmap+0x854/0xf00 [ 30.879689] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.880194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.880752] ksys_mmap_pgoff+0x3af/0x500 [ 30.881272] do_syscall_64+0x3f/0x90 [ 30.881759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.882410] RIP: 0033:0x7f22fad12d82 [ 30.882867] 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 [ 30.885024] RSP: 002b:00007ffdd525ae88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.885948] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22fad12d82 [ 30.886807] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22fa14c000 [ 30.887653] RBP: 00007f22fa14c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.888498] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c76cc2ec0 [ 30.889360] R13: 00007ffdd525aea0 R14: 00007ffdd525aed0 R15: 00007ffdd525b230 [ 30.890222] [ 30.890515] [ 30.890734] Allocated by task 214: [ 30.891162] kasan_save_stack+0x22/0x50 [ 30.891671] kasan_set_track+0x25/0x30 [ 30.892171] __kasan_slab_alloc+0x59/0x70 [ 30.892698] kmem_cache_alloc+0x16b/0x370 [ 30.893221] vm_area_dup+0x20/0x160 [ 30.893679] __split_vma+0x170/0x950 [ 30.894145] split_vma+0xc6/0x110 [ 30.894586] mprotect_fixup+0x8d2/0xb30 [ 30.895090] do_mprotect_pkey+0x87e/0xd40 [ 30.895612] __x64_sys_mprotect+0x78/0xc0 [ 30.896135] do_syscall_64+0x3f/0x90 [ 30.896612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.897274] [ 30.897489] Freed by task 214: [ 30.897883] kasan_save_stack+0x22/0x50 [ 30.898386] kasan_set_track+0x25/0x30 [ 30.898880] kasan_save_free_info+0x2b/0x50 [ 30.899416] __kasan_slab_free+0x10a/0x190 [ 30.899946] kmem_cache_free+0x10d/0x4d0 [ 30.900454] rcu_core+0x8c8/0x2860 [ 30.900899] __do_softirq+0x1b7/0x7d4 [ 30.901385] [ 30.901654] Last potentially related work creation: [ 30.902277] kasan_save_stack+0x22/0x50 [ 30.902775] __kasan_record_aux_stack+0x8e/0xa0 [ 30.903351] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.903995] remove_vma+0x139/0x170 [ 30.904451] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.905008] do_vmi_munmap+0x1f1/0x2b0 [ 30.905525] __vm_munmap+0x138/0x3a0 [ 30.905993] __x64_sys_munmap+0x59/0x80 [ 30.906490] do_syscall_64+0x3f/0x90 [ 30.906964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.907605] [ 30.907820] The buggy address belongs to the object at ffff8880164a3d98 [ 30.907820] which belongs to the cache vm_area_struct of size 168 [ 30.909316] The buggy address is located 88 bytes inside of [ 30.909316] freed 168-byte region [ffff8880164a3d98, ffff8880164a3e40) [ 30.910727] [ 30.910941] The buggy address belongs to the physical page: [ 30.911596] page:000000000d71a5e1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164a3 [ 30.912685] memcg:ffff88800a931601 [ 30.913109] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.913756] page_type: 0xffffffff() [ 30.914210] raw: 0100000000000200 ffff8880087a0c80 ffffea0000592840 0000000000000008 [ 30.915139] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a931601 [ 30.916041] page dumped because: kasan: bad access detected [ 30.916705] [ 30.916918] Memory state around the buggy address: [ 30.917519] ffff8880164a3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.918381] ffff8880164a3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.919248] >ffff8880164a3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.920104] ^ [ 30.920912] ffff8880164a3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.921782] ffff8880164a3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.922638] ================================================================== [ 30.923654] Disabling lock debugging due to kernel taint [ 33.147155] BUG: Bad rss-counter state mm:00000000cfc13474 type:MM_FILEPAGES val:33 [ 33.148506] BUG: Bad rss-counter state mm:00000000cfc13474 type:MM_ANONPAGES val:22 [ 33.583064] BUG: Bad rss-counter state mm:00000000caab5d59 type:MM_FILEPAGES val:33 [ 33.584074] BUG: Bad rss-counter state mm:00000000caab5d59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41978' (ECDSA) to the list of known hosts. 2023/06/20 20:34:37 fuzzer started 2023/06/20 20:34:37 dialing manager at localhost:36067 2023/06/20 20:34:37 checking machine... 2023/06/20 20:34:37 checking revisions... [ 34.325868] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:34:37 testing simple program... [ 34.374541] cgroup: Unknown subsys name 'net' [ 34.424007] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:34:36 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff83ab1b35 RDI=ffff888016fa03f4 RBP=0000000000000000 RSP=ffff88800f477500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000096000000960 R12=0000000000000000 R13=00000000000000ff R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0871 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 00007f09e3b86900 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=00007ffcd7b71000 CR3=000000000e82a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8118ddc3 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09f01 RSI=ffff88806cf09fe0 RDI=ffff88806cf09fe0 RBP=ffff88806cf09af0 RSP=ffff88806cf09a20 R8 =ffffffff864b6d22 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09fe8 R15=ffff88806cf09a98 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 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=00007f4ea75ffae0 CR3=000000000e1ae000 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=2036333a34333a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a34333a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000