syzkaller login: [ 31.568200] BUG: Bad rss-counter state mm:00000000bb0936cc type:MM_FILEPAGES val:33 [ 31.569588] BUG: Bad rss-counter state mm:00000000bb0936cc type:MM_ANONPAGES val:22 [ 31.720193] ================================================================== [ 31.721328] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.722551] Read of size 8 at addr ffff888010178228 by task sshd/220 [ 31.723493] [ 31.723768] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.724895] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.726036] Call Trace: [ 31.726444] [ 31.726767] dump_stack_lvl+0x91/0xf0 [ 31.727306] print_report+0xcc/0x620 [ 31.727897] ? __virt_addr_valid+0x102/0x340 [ 31.728560] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.729248] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.729947] kasan_report+0xbe/0xf0 [ 31.730490] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.731263] vma_interval_tree_remove+0xc75/0xec0 [ 31.731903] vma_prepare+0xc54/0x11a0 [ 31.732417] __split_vma+0x5af/0x950 [ 31.732976] ? __pfx___split_vma+0x10/0x10 [ 31.733597] ? find_held_lock+0x2c/0x110 [ 31.734170] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.734770] ? lock_is_held_type+0x9f/0x120 [ 31.735366] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.736031] ? mtree_range_walk+0x632/0x900 [ 31.736687] ? mas_walk+0x5c7/0x7c0 [ 31.737236] do_vmi_munmap+0x1f1/0x2b0 [ 31.737810] mmap_region+0x1f9/0x2660 [ 31.738337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.738942] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.739758] ? __pfx_lock_acquire+0x10/0x10 [ 31.740400] ? __pfx_mmap_region+0x10/0x10 [ 31.741069] ? security_mmap_addr+0x7d/0xa0 [ 31.741637] ? get_unmapped_area+0x1f5/0x3f0 [ 31.742200] do_mmap+0x854/0xf00 [ 31.742651] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.743183] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.743815] ksys_mmap_pgoff+0x3af/0x500 [ 31.744444] do_syscall_64+0x3f/0x90 [ 31.744989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.745804] RIP: 0033:0x7f38fc225d82 [ 31.746428] 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 [ 31.749204] RSP: 002b:00007fff003f13c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.750320] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38fc225d82 [ 31.751430] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38fb65f000 [ 31.752617] RBP: 00007f38fb65f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.753749] R10: 0000000000000812 R11: 0000000000000206 R12: 000056553b068b20 [ 31.754857] R13: 00007fff003f13e0 R14: 00007fff003f1410 R15: 00007fff003f1770 [ 31.755928] [ 31.756230] [ 31.756443] Allocated by task 213: [ 31.756945] kasan_save_stack+0x22/0x50 [ 31.757476] kasan_set_track+0x25/0x30 [ 31.758035] __kasan_slab_alloc+0x59/0x70 [ 31.758684] kmem_cache_alloc+0x16b/0x370 [ 31.759296] vm_area_dup+0x20/0x160 [ 31.759852] __split_vma+0x170/0x950 [ 31.760413] split_vma+0xc6/0x110 [ 31.760928] mprotect_fixup+0x8d2/0xb30 [ 31.761534] do_mprotect_pkey+0x87e/0xd40 [ 31.762161] __x64_sys_mprotect+0x78/0xc0 [ 31.762748] do_syscall_64+0x3f/0x90 [ 31.763281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.764039] [ 31.764293] Freed by task 213: [ 31.764742] kasan_save_stack+0x22/0x50 [ 31.765275] kasan_set_track+0x25/0x30 [ 31.765789] kasan_save_free_info+0x2b/0x50 [ 31.766346] __kasan_slab_free+0x10a/0x190 [ 31.766896] kmem_cache_free+0x10d/0x4d0 [ 31.767428] rcu_core+0x8c8/0x2860 [ 31.767873] __do_softirq+0x1b7/0x7d4 [ 31.768369] [ 31.768629] Last potentially related work creation: [ 31.769237] kasan_save_stack+0x22/0x50 [ 31.769756] __kasan_record_aux_stack+0x8e/0xa0 [ 31.770400] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.771148] remove_vma+0x139/0x170 [ 31.771658] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.772300] do_vmi_munmap+0x1f1/0x2b0 [ 31.772897] __vm_munmap+0x138/0x3a0 [ 31.773455] __x64_sys_munmap+0x59/0x80 [ 31.774066] do_syscall_64+0x3f/0x90 [ 31.774617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.775344] [ 31.775562] The buggy address belongs to the object at ffff8880101781d0 [ 31.775562] which belongs to the cache vm_area_struct of size 168 [ 31.777175] The buggy address is located 88 bytes inside of [ 31.777175] freed 168-byte region [ffff8880101781d0, ffff888010178278) [ 31.778632] [ 31.778894] The buggy address belongs to the physical page: [ 31.779662] page:000000000bac6162 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10178 [ 31.780813] memcg:ffff888016a73101 [ 31.781258] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.781931] page_type: 0xffffffff() [ 31.782448] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.783489] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a73101 [ 31.784687] page dumped because: kasan: bad access detected [ 31.785547] [ 31.785827] Memory state around the buggy address: [ 31.786640] ffff888010178100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.787824] ffff888010178180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.788952] >ffff888010178200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.789989] ^ [ 31.790636] ffff888010178280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.791626] ffff888010178300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.792648] ================================================================== [ 31.793382] Disabling lock debugging due to kernel taint [ 33.727504] BUG: Bad rss-counter state mm:0000000032ef605d type:MM_FILEPAGES val:33 [ 33.728071] BUG: Bad rss-counter state mm:0000000032ef605d type:MM_ANONPAGES val:22 [ 34.160183] BUG: Bad rss-counter state mm:00000000cc06f499 type:MM_FILEPAGES val:33 [ 34.161446] BUG: Bad rss-counter state mm:00000000cc06f499 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13041' (ECDSA) to the list of known hosts. 2023/06/20 12:47:48 fuzzer started 2023/06/20 12:47:48 dialing manager at localhost:36067 2023/06/20 12:47:48 checking machine... 2023/06/20 12:47:48 checking revisions... [ 34.901138] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:47:49 testing simple program... [ 34.952265] cgroup: Unknown subsys name 'net' [ 34.986764] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:47:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019bdc808 RCX=ffffffff81b3cffa RDX=ffff888015d18000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88801814f9d8 RSP=ffff88801814f920 R8 =0000000000000005 R9 =00000000fffffffb R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff888019ae49a0 R14=ffff888019bdc830 R15=ffff88800ff8e000 RIP=ffffffff814c0408 RFL=00000246 [---Z-P-] 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 00007fe53ffff700 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=00007f31930374b0 CR3=000000000ef5e000 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=2038343a37343a3231203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a303637373320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a37343a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb7341 RBX=ffffffff85db9a08 RCX=ffffffff81370a89 RDX=0000000000000000 RSI=ffffffff860d2550 RDI=ffffffff85db99f4 RBP=ffffffff85db99f4 RSP=ffff888019d679e0 R8 =ffffffff860d2550 R9 =ffff888019d67ad8 R10=0000000000038001 R11=000000000000fc0c R12=ffffffff85db9a20 R13=ffffffff85db99f4 R14=ffffffff85db99f4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f943e05e900 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=00007ffcea5e0000 CR3=000000000cb8a000 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=6720646572637465733a4d41503d706f 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