syzkaller login: [ 28.767416] BUG: Bad rss-counter state mm:000000002ffe6fae type:MM_FILEPAGES val:33 [ 28.769183] BUG: Bad rss-counter state mm:000000002ffe6fae type:MM_ANONPAGES val:22 [ 28.945067] ================================================================== [ 28.946150] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.947273] Read of size 8 at addr ffff88800e6a4798 by task sshd/219 [ 28.948347] [ 28.948609] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.949642] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.950882] Call Trace: [ 28.951263] [ 28.951594] dump_stack_lvl+0x91/0xf0 [ 28.952120] print_report+0xcc/0x620 [ 28.952644] ? __virt_addr_valid+0x102/0x340 [ 28.953233] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.953878] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.954510] kasan_report+0xbe/0xf0 [ 28.955035] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.955710] vma_interval_tree_remove+0xc75/0xec0 [ 28.956360] vma_prepare+0xc54/0x11a0 [ 28.956884] __split_vma+0x5af/0x950 [ 28.957394] ? __pfx___split_vma+0x10/0x10 [ 28.957969] ? find_held_lock+0x2c/0x110 [ 28.958536] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.959127] ? lock_is_held_type+0x9f/0x120 [ 28.959665] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.960270] ? mtree_range_walk+0x632/0x900 [ 28.960818] ? mas_walk+0x5c7/0x7c0 [ 28.961295] do_vmi_munmap+0x1f1/0x2b0 [ 28.961787] mmap_region+0x1f9/0x2660 [ 28.962270] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.962801] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.963514] ? __pfx_lock_acquire+0x10/0x10 [ 28.964049] ? __pfx_mmap_region+0x10/0x10 [ 28.964581] ? security_mmap_addr+0x7d/0xa0 [ 28.965101] ? get_unmapped_area+0x1f5/0x3f0 [ 28.965654] do_mmap+0x854/0xf00 [ 28.966091] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.966581] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.967165] ksys_mmap_pgoff+0x3af/0x500 [ 28.967671] do_syscall_64+0x3f/0x90 [ 28.968147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.968798] RIP: 0033:0x7f7a223a9d82 [ 28.969256] 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 [ 28.971418] RSP: 002b:00007fff469e4cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.972313] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a223a9d82 [ 28.973151] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a217e3000 [ 28.974006] RBP: 00007f7a217e3000 R08: 0000000000000009 R09: 0000000000001000 [ 28.974860] R10: 0000000000000812 R11: 0000000000000206 R12: 000056143b365b20 [ 28.975696] R13: 00007fff469e4cd0 R14: 00007fff469e4d00 R15: 00007fff469e5060 [ 28.976552] [ 28.976842] [ 28.977055] Allocated by task 212: [ 28.977484] kasan_save_stack+0x22/0x50 [ 28.977986] kasan_set_track+0x25/0x30 [ 28.978479] __kasan_slab_alloc+0x59/0x70 [ 28.979017] kmem_cache_alloc+0x16b/0x370 [ 28.979532] vm_area_dup+0x20/0x160 [ 28.979983] __split_vma+0x170/0x950 [ 28.980449] split_vma+0xc6/0x110 [ 28.980883] mprotect_fixup+0x8d2/0xb30 [ 28.981379] do_mprotect_pkey+0x87e/0xd40 [ 28.981898] __x64_sys_mprotect+0x78/0xc0 [ 28.982411] do_syscall_64+0x3f/0x90 [ 28.982899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.983539] [ 28.983751] Freed by task 212: [ 28.984143] kasan_save_stack+0x22/0x50 [ 28.984643] kasan_set_track+0x25/0x30 [ 28.985130] kasan_save_free_info+0x2b/0x50 [ 28.985655] __kasan_slab_free+0x10a/0x190 [ 28.986179] kmem_cache_free+0x10d/0x4d0 [ 28.986692] rcu_core+0x8c8/0x2860 [ 28.987135] __do_softirq+0x1b7/0x7d4 [ 28.987613] [ 28.987825] Last potentially related work creation: [ 28.988403] kasan_save_stack+0x22/0x50 [ 28.988966] __kasan_record_aux_stack+0x8e/0xa0 [ 28.989533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.990179] remove_vma+0x139/0x170 [ 28.990646] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.991197] do_vmi_munmap+0x1f1/0x2b0 [ 28.991684] __vm_munmap+0x138/0x3a0 [ 28.992159] __x64_sys_munmap+0x59/0x80 [ 28.992653] do_syscall_64+0x3f/0x90 [ 28.993123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.993771] [ 28.993989] Second to last potentially related work creation: [ 28.994677] kasan_save_stack+0x22/0x50 [ 28.995172] __kasan_record_aux_stack+0x8e/0xa0 [ 28.995740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.996375] remove_vma+0x139/0x170 [ 28.996820] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.997368] do_vmi_munmap+0x1f1/0x2b0 [ 28.997846] mmap_region+0x1f9/0x2660 [ 28.998319] do_mmap+0x854/0xf00 [ 28.998749] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.999231] ksys_mmap_pgoff+0x7d/0x500 [ 28.999721] do_syscall_64+0x3f/0x90 [ 29.000195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.000835] [ 29.001049] The buggy address belongs to the object at ffff88800e6a4740 [ 29.001049] which belongs to the cache vm_area_struct of size 168 [ 29.002517] The buggy address is located 88 bytes inside of [ 29.002517] freed 168-byte region [ffff88800e6a4740, ffff88800e6a47e8) [ 29.003943] [ 29.004162] The buggy address belongs to the physical page: [ 29.004817] page:0000000040d5bd51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6a4 [ 29.005898] memcg:ffff88800e5ed701 [ 29.006320] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.006974] page_type: 0xffffffff() [ 29.007426] raw: 0100000000000200 ffff8880087a0c80 ffffea000038d700 dead000000000006 [ 29.008333] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5ed701 [ 29.009240] page dumped because: kasan: bad access detected [ 29.009895] [ 29.010110] Memory state around the buggy address: [ 29.010704] ffff88800e6a4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.011550] ffff88800e6a4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.012402] >ffff88800e6a4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.013251] ^ [ 29.013743] ffff88800e6a4800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.014605] ffff88800e6a4880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.015451] ================================================================== [ 29.016407] Disabling lock debugging due to kernel taint [ 31.741917] BUG: Bad rss-counter state mm:00000000b5b2736a type:MM_FILEPAGES val:33 [ 31.743684] BUG: Bad rss-counter state mm:00000000b5b2736a type:MM_ANONPAGES val:22 [ 32.204404] BUG: Bad rss-counter state mm:000000001796e94e type:MM_FILEPAGES val:33 [ 32.205398] BUG: Bad rss-counter state mm:000000001796e94e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18177' (ECDSA) to the list of known hosts. 2023/06/21 02:17:33 fuzzer started 2023/06/21 02:17:33 dialing manager at localhost:36067 2023/06/21 02:17:33 checking machine... 2023/06/21 02:17:33 checking revisions... [ 32.931307] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:17:33 testing simple program... [ 32.975448] cgroup: Unknown subsys name 'net' [ 33.022255] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:17:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00000000000002f1 RCX=1ffff11001eb7626 RDX=1ffff11002198682 RSI=ffffffff81f3b6c5 RDI=ffff88800eedfbc4 RBP=ffff88800eedfbc0 RSP=ffff88800eedfa38 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000008000 R11=00000000000b6a61 R12=ffff888010cc3410 R13=0000000000007fff R14=00000000000002f1 R15=000000000000002b RIP=ffffffff81f3b83c 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 00007f3df2925900 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=00007f3df2edc618 CR3=00000000182b6000 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=dffffc0000000000 RBX=0000000000000042 RCX=ffffffff813782c0 RDX=1ffff11001bd4464 RSI=0000000000000000 RDI=ffff88800844f780 RBP=dead000000000122 RSP=ffff88806cf09e18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=dead000000000100 R13=ffff88800dea22e0 R14=ffff88800dea2260 R15=dffffc0000000000 RIP=ffffffff81845fc2 RFL=00000287 [--S--PC] 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=00007f2117f28d50 CR3=000000000c640000 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=2033333a37313a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a37313a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000