syzkaller login: [ 36.346006] BUG: Bad rss-counter state mm:0000000003e9ebc5 type:MM_FILEPAGES val:33 [ 36.347216] BUG: Bad rss-counter state mm:0000000003e9ebc5 type:MM_ANONPAGES val:22 [ 36.476922] ================================================================== [ 36.478004] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.479131] Read of size 8 at addr ffff88800edd2058 by task sshd/221 [ 36.480163] [ 36.480460] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.481520] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.482724] Call Trace: [ 36.483093] [ 36.483390] dump_stack_lvl+0x91/0xf0 [ 36.483883] print_report+0xcc/0x620 [ 36.484371] ? __virt_addr_valid+0x102/0x340 [ 36.484927] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.485546] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.486164] kasan_report+0xbe/0xf0 [ 36.486646] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.487313] vma_interval_tree_remove+0xc75/0xec0 [ 36.487941] vma_prepare+0xc54/0x11a0 [ 36.488435] __split_vma+0x5af/0x950 [ 36.488925] ? __pfx___split_vma+0x10/0x10 [ 36.489472] ? find_held_lock+0x2c/0x110 [ 36.490004] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.490579] ? lock_is_held_type+0x9f/0x120 [ 36.491144] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.491793] ? mtree_range_walk+0x632/0x900 [ 36.492365] ? mas_walk+0x5c7/0x7c0 [ 36.492862] do_vmi_munmap+0x1f1/0x2b0 [ 36.493368] mmap_region+0x1f9/0x2660 [ 36.493863] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.494394] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.495135] ? __pfx_lock_acquire+0x10/0x10 [ 36.495711] ? __pfx_mmap_region+0x10/0x10 [ 36.496245] ? security_mmap_addr+0x7d/0xa0 [ 36.496777] ? get_unmapped_area+0x1f5/0x3f0 [ 36.497356] do_mmap+0x854/0xf00 [ 36.497798] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.498298] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.498873] ksys_mmap_pgoff+0x3af/0x500 [ 36.499413] do_syscall_64+0x3f/0x90 [ 36.499895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.500547] RIP: 0033:0x7f94c340bd82 [ 36.501009] 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 [ 36.503197] RSP: 002b:00007ffea0184288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.504166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f94c340bd82 [ 36.505031] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f94c2845000 [ 36.505896] RBP: 00007f94c2845000 R08: 0000000000000009 R09: 0000000000001000 [ 36.506755] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a335acf70 [ 36.507628] R13: 00007ffea01842a0 R14: 00007ffea01842d0 R15: 00007ffea0184630 [ 36.508521] [ 36.508828] [ 36.509044] Allocated by task 214: [ 36.509494] kasan_save_stack+0x22/0x50 [ 36.510019] kasan_set_track+0x25/0x30 [ 36.510528] __kasan_slab_alloc+0x59/0x70 [ 36.511055] kmem_cache_alloc+0x16b/0x370 [ 36.511574] vm_area_dup+0x20/0x160 [ 36.512044] __split_vma+0x170/0x950 [ 36.512520] split_vma+0xc6/0x110 [ 36.512970] mprotect_fixup+0x8d2/0xb30 [ 36.513490] do_mprotect_pkey+0x87e/0xd40 [ 36.514021] __x64_sys_mprotect+0x78/0xc0 [ 36.514543] do_syscall_64+0x3f/0x90 [ 36.515043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.515719] [ 36.515941] Freed by task 214: [ 36.516334] kasan_save_stack+0x22/0x50 [ 36.516848] kasan_set_track+0x25/0x30 [ 36.517353] kasan_save_free_info+0x2b/0x50 [ 36.517881] __kasan_slab_free+0x10a/0x190 [ 36.518428] kmem_cache_free+0x10d/0x4d0 [ 36.518943] rcu_core+0x8c8/0x2860 [ 36.519422] __do_softirq+0x1b7/0x7d4 [ 36.519919] [ 36.520139] Last potentially related work creation: [ 36.520738] kasan_save_stack+0x22/0x50 [ 36.521246] __kasan_record_aux_stack+0x8e/0xa0 [ 36.521906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.522560] remove_vma+0x139/0x170 [ 36.523012] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.523609] do_vmi_munmap+0x1f1/0x2b0 [ 36.524100] __vm_munmap+0x138/0x3a0 [ 36.524584] __x64_sys_munmap+0x59/0x80 [ 36.525089] do_syscall_64+0x3f/0x90 [ 36.525578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.526224] [ 36.526442] The buggy address belongs to the object at ffff88800edd2000 [ 36.526442] which belongs to the cache vm_area_struct of size 168 [ 36.527948] The buggy address is located 88 bytes inside of [ 36.527948] freed 168-byte region [ffff88800edd2000, ffff88800edd20a8) [ 36.529373] [ 36.529592] The buggy address belongs to the physical page: [ 36.530262] page:00000000a23b2796 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedd2 [ 36.531394] memcg:ffff88800bbafd01 [ 36.531828] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.532489] page_type: 0xffffffff() [ 36.532941] raw: 0100000000000200 ffff88800879fc80 ffffea00003d9f80 dead000000000004 [ 36.533865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bbafd01 [ 36.534781] page dumped because: kasan: bad access detected [ 36.535457] [ 36.535678] Memory state around the buggy address: [ 36.536260] ffff88800edd1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.537113] ffff88800edd1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.537967] >ffff88800edd2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.538814] ^ [ 36.539549] ffff88800edd2080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 36.540408] ffff88800edd2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.541256] ================================================================== [ 36.542343] Disabling lock debugging due to kernel taint [ 38.729994] BUG: Bad rss-counter state mm:00000000acd95905 type:MM_FILEPAGES val:33 [ 38.731294] BUG: Bad rss-counter state mm:00000000acd95905 type:MM_ANONPAGES val:22 [ 39.211987] BUG: Bad rss-counter state mm:000000009abff39e type:MM_FILEPAGES val:33 [ 39.214212] BUG: Bad rss-counter state mm:000000009abff39e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19206' (ECDSA) to the list of known hosts. 2023/06/20 01:33:38 fuzzer started 2023/06/20 01:33:38 dialing manager at localhost:44161 2023/06/20 01:33:38 checking machine... 2023/06/20 01:33:38 checking revisions... [ 39.794297] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:33:38 testing simple program... [ 39.831464] cgroup: Unknown subsys name 'net' [ 39.881310] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:33:32 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=ffff888008c58000 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=00007f7f3bf5ac90 CR3=0000000009730000 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=27c98d58b05cba805647cd2caf2e6961 XMM02=2c67c8bc2e329bc3000000000011e320 XMM03=fb795ef6d65770560000000000124be8 XMM04=7e15f83b8bd29e0a00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134788 XMM06=7526b85bd9d16a1100000000001335f0 XMM07=e042d86d42eb936e0000000000124e68 XMM08=55fd73ec6501be5a000000000011e380 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f42f657a618 CR3=000000000b3c6000 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=2037333a33333a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a33333a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000