syzkaller login: [ 71.694043] BUG: Bad rss-counter state mm:000000007d8cacca type:MM_FILEPAGES val:33 [ 71.695059] BUG: Bad rss-counter state mm:000000007d8cacca type:MM_ANONPAGES val:22 [ 71.733223] ================================================================== [ 71.734469] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.735840] Read of size 8 at addr ffff888017c88a50 by task sshd/221 [ 71.737063] [ 71.737325] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 71.738571] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.739777] Call Trace: [ 71.740173] [ 71.740516] dump_stack_lvl+0x91/0xf0 [ 71.741313] print_report+0xcc/0x620 [ 71.741883] ? __virt_addr_valid+0x102/0x340 [ 71.742537] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.743275] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.744039] kasan_report+0xbe/0xf0 [ 71.744614] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.745252] vma_interval_tree_remove+0xc75/0xec0 [ 71.745859] vma_prepare+0xc54/0x11a0 [ 71.746332] __split_vma+0x5af/0x950 [ 71.746807] ? __pfx___split_vma+0x10/0x10 [ 71.747327] ? find_held_lock+0x2c/0x110 [ 71.747854] do_vmi_align_munmap+0x2ba/0x11f0 [ 71.748427] ? lock_is_held_type+0x9f/0x120 [ 71.748955] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 71.749559] ? mtree_range_walk+0x632/0x900 [ 71.750106] ? mas_walk+0x5c7/0x7c0 [ 71.750580] do_vmi_munmap+0x1f1/0x2b0 [ 71.751067] mmap_region+0x1f9/0x2660 [ 71.751548] ? vm_mmap_pgoff+0x15c/0x3a0 [ 71.752077] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 71.752780] ? __pfx_lock_acquire+0x10/0x10 [ 71.753305] ? __pfx_mmap_region+0x10/0x10 [ 71.753830] ? security_mmap_addr+0x7d/0xa0 [ 71.754356] ? get_unmapped_area+0x1f5/0x3f0 [ 71.754901] do_mmap+0x854/0xf00 [ 71.755333] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.755824] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.756403] ksys_mmap_pgoff+0x3af/0x500 [ 71.756911] do_syscall_64+0x3f/0x90 [ 71.757386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.758032] RIP: 0033:0x7fdfb585fd82 [ 71.758485] 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 [ 71.760621] RSP: 002b:00007ffc2c486238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 71.761515] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdfb585fd82 [ 71.762359] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdfb4c99000 [ 71.763193] RBP: 00007fdfb4c99000 R08: 0000000000000009 R09: 0000000000001000 [ 71.764046] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7309f0ec0 [ 71.764890] R13: 00007ffc2c486250 R14: 00007ffc2c486280 R15: 00007ffc2c4865e0 [ 71.765737] [ 71.766028] [ 71.766246] Allocated by task 214: [ 71.766668] kasan_save_stack+0x22/0x50 [ 71.767166] kasan_set_track+0x25/0x30 [ 71.767654] __kasan_slab_alloc+0x59/0x70 [ 71.768185] kmem_cache_alloc+0x16b/0x370 [ 71.768696] vm_area_dup+0x20/0x160 [ 71.769140] __split_vma+0x170/0x950 [ 71.769601] split_vma+0xc6/0x110 [ 71.770030] mprotect_fixup+0x8d2/0xb30 [ 71.770523] do_mprotect_pkey+0x87e/0xd40 [ 71.771032] __x64_sys_mprotect+0x78/0xc0 [ 71.771543] do_syscall_64+0x3f/0x90 [ 71.772013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.772645] [ 71.772855] Freed by task 214: [ 71.773239] kasan_save_stack+0x22/0x50 [ 71.773760] kasan_set_track+0x25/0x30 [ 71.774250] kasan_save_free_info+0x2b/0x50 [ 71.774786] __kasan_slab_free+0x10a/0x190 [ 71.775314] kmem_cache_free+0x10d/0x4d0 [ 71.775816] rcu_core+0x8c8/0x2860 [ 71.776266] __do_softirq+0x1b7/0x7d4 [ 71.776738] [ 71.776950] Last potentially related work creation: [ 71.777526] kasan_save_stack+0x22/0x50 [ 71.778025] __kasan_record_aux_stack+0x8e/0xa0 [ 71.778635] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.779270] remove_vma+0x139/0x170 [ 71.779713] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.780270] do_vmi_munmap+0x1f1/0x2b0 [ 71.780747] __vm_munmap+0x138/0x3a0 [ 71.781209] __x64_sys_munmap+0x59/0x80 [ 71.781698] do_syscall_64+0x3f/0x90 [ 71.782165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.782789] [ 71.783001] The buggy address belongs to the object at ffff888017c889f8 [ 71.783001] which belongs to the cache vm_area_struct of size 168 [ 71.784454] The buggy address is located 88 bytes inside of [ 71.784454] freed 168-byte region [ffff888017c889f8, ffff888017c88aa0) [ 71.785841] [ 71.786052] The buggy address belongs to the physical page: [ 71.786705] page:0000000077e115c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c88 [ 71.787779] memcg:ffff888015af1a01 [ 71.788218] flags: 0x100000000000200(slab|node=0|zone=1) [ 71.788854] page_type: 0xffffffff() [ 71.789301] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 71.790217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015af1a01 [ 71.791115] page dumped because: kasan: bad access detected [ 71.791765] [ 71.791988] Memory state around the buggy address: [ 71.792554] ffff888017c88900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.793398] ffff888017c88980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 71.794237] >ffff888017c88a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.795080] ^ [ 71.795774] ffff888017c88a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 71.796639] ffff888017c88b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.797482] ================================================================== [ 71.798467] Disabling lock debugging due to kernel taint [ 73.688188] BUG: Bad rss-counter state mm:00000000fcf8928e type:MM_FILEPAGES val:33 [ 73.689149] BUG: Bad rss-counter state mm:00000000fcf8928e type:MM_ANONPAGES val:22 [ 74.229165] BUG: Bad rss-counter state mm:0000000082902a03 type:MM_FILEPAGES val:33 [ 74.230310] BUG: Bad rss-counter state mm:0000000082902a03 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37150' (ECDSA) to the list of known hosts. 2023/06/20 06:57:56 fuzzer started 2023/06/20 06:57:56 dialing manager at localhost:44161 2023/06/20 06:57:56 checking machine... 2023/06/20 06:57:56 checking revisions... [ 74.856081] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:57:57 testing simple program... [ 74.902975] cgroup: Unknown subsys name 'net' [ 74.948576] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:57:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000562d63687ab0 RCX=0000000000000005 RDX=0000000000000002 RSI=0000562d6368c7c9 RDI=00007fe21893700b RBP=0000000000000020 RSP=00007fffe5e13f30 R8 =0000562d6366e350 R9 =0000562d6368c7c8 R10=00007fe218937010 R11=00007fe218937016 R12=0000562d63687ac0 R13=0000000000000000 R14=0000000000000000 R15=00007fe21893700a RIP=00007fe2189362ac RFL=00000216 [----AP-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe21898f900 00000000 00000000 GS =0000 0000000000000000 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=00007fe218f44650 CR3=000000000c692000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007f40bee83f70 CR3=000000000d81e000 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=049fffa94777f9825d475aa38348bc52 XMM02=0000000000121f00eff9b2d0a8fce9cb XMM03=0000000000121fd02c67c8bc2e329bc3 XMM04=14b625fcf3fff54c00000000000ae988 XMM05=07814db95b5dfb8a0000000000139b10 XMM06=c291bd5c70af25b90000000000139508 XMM07=e042d86d42eb936e00000000001296b8 XMM08=82e01ec5677eb4310000000000121fd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000