syzkaller login: [ 28.785259] BUG: Bad rss-counter state mm:00000000306495ed type:MM_FILEPAGES val:33 [ 28.786552] BUG: Bad rss-counter state mm:00000000306495ed type:MM_ANONPAGES val:22 [ 28.941313] ================================================================== [ 28.942221] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.943169] Read of size 8 at addr ffff88800f6815c8 by task sshd/221 [ 28.944117] [ 28.944336] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.945218] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.946198] Call Trace: [ 28.946514] <TASK> [ 28.946797] dump_stack_lvl+0x91/0xf0 [ 28.947288] print_report+0xcc/0x620 [ 28.947772] ? __virt_addr_valid+0x102/0x340 [ 28.948326] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.948953] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.949567] kasan_report+0xbe/0xf0 [ 28.950051] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.950673] vma_interval_tree_remove+0xc75/0xec0 [ 28.951274] vma_prepare+0xc54/0x11a0 [ 28.951754] __split_vma+0x5af/0x950 [ 28.952224] ? __pfx___split_vma+0x10/0x10 [ 28.952781] ? find_held_lock+0x2c/0x110 [ 28.953310] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.953875] ? lock_is_held_type+0x9f/0x120 [ 28.954424] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.955031] ? mtree_range_walk+0x632/0x900 [ 28.955588] ? mas_walk+0x5c7/0x7c0 [ 28.956060] do_vmi_munmap+0x1f1/0x2b0 [ 28.956562] mmap_region+0x1f9/0x2660 [ 28.957046] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.957559] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.958275] ? __pfx_lock_acquire+0x10/0x10 [ 28.958811] ? __pfx_mmap_region+0x10/0x10 [ 28.959346] ? security_mmap_addr+0x7d/0xa0 [ 28.959880] ? get_unmapped_area+0x1f5/0x3f0 [ 28.960435] do_mmap+0x854/0xf00 [ 28.960894] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.961393] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.961950] ksys_mmap_pgoff+0x3af/0x500 [ 28.962460] do_syscall_64+0x3f/0x90 [ 28.962940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.963595] RIP: 0033:0x7fa8784e2d82 [ 28.964051] 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 [ 28.966179] RSP: 002b:00007ffc72e95a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.967105] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8784e2d82 [ 28.967964] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa87791c000 [ 28.968846] RBP: 00007fa87791c000 R08: 0000000000000009 R09: 0000000000001000 [ 28.969703] R10: 0000000000000812 R11: 0000000000000206 R12: 000056549edddd90 [ 28.970570] R13: 00007ffc72e95a80 R14: 00007ffc72e95ab0 R15: 00007ffc72e95e10 [ 28.971437] </TASK> [ 28.971732] [ 28.971950] Allocated by task 214: [ 28.972393] kasan_save_stack+0x22/0x50 [ 28.972912] kasan_set_track+0x25/0x30 [ 28.973410] __kasan_slab_alloc+0x59/0x70 [ 28.973941] kmem_cache_alloc+0x16b/0x370 [ 28.974464] vm_area_dup+0x20/0x160 [ 28.974935] __split_vma+0x170/0x950 [ 28.975424] split_vma+0xc6/0x110 [ 28.975870] mprotect_fixup+0x8d2/0xb30 [ 28.976373] do_mprotect_pkey+0x87e/0xd40 [ 28.976910] __x64_sys_mprotect+0x78/0xc0 [ 28.977439] do_syscall_64+0x3f/0x90 [ 28.977924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.978578] [ 28.978799] Freed by task 214: [ 28.979191] kasan_save_stack+0x22/0x50 [ 28.979691] kasan_set_track+0x25/0x30 [ 28.980193] kasan_save_free_info+0x2b/0x50 [ 28.980745] __kasan_slab_free+0x10a/0x190 [ 28.981281] kmem_cache_free+0x10d/0x4d0 [ 28.981797] rcu_core+0x8c8/0x2860 [ 28.982246] __do_softirq+0x1b7/0x7d4 [ 28.982738] [ 28.982954] Last potentially related work creation: [ 28.983557] kasan_save_stack+0x22/0x50 [ 28.984067] __kasan_record_aux_stack+0x8e/0xa0 [ 28.984645] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.985363] remove_vma+0x139/0x170 [ 28.985818] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.986386] do_vmi_munmap+0x1f1/0x2b0 [ 28.986878] __vm_munmap+0x138/0x3a0 [ 28.987351] __x64_sys_munmap+0x59/0x80 [ 28.987846] do_syscall_64+0x3f/0x90 [ 28.988324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.988988] [ 28.989205] The buggy address belongs to the object at ffff88800f681570 [ 28.989205] which belongs to the cache vm_area_struct of size 168 [ 28.990674] The buggy address is located 88 bytes inside of [ 28.990674] freed 168-byte region [ffff88800f681570, ffff88800f681618) [ 28.992094] [ 28.992310] The buggy address belongs to the physical page: [ 28.992984] page:000000007713e8c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf681 [ 28.994075] memcg:ffff888016607901 [ 28.994500] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.995153] page_type: 0xffffffff() [ 28.995608] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.996547] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016607901 [ 28.997457] page dumped because: kasan: bad access detected [ 28.998120] [ 28.998335] Memory state around the buggy address: [ 28.998922] ffff88800f681480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.999799] ffff88800f681500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 29.000687] >ffff88800f681580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.001544] ^ [ 29.002228] ffff88800f681600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.003098] ffff88800f681680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.003955] ================================================================== [ 29.004912] Disabling lock debugging due to kernel taint [ 31.553131] BUG: Bad rss-counter state mm:0000000079ebb4c1 type:MM_FILEPAGES val:33 [ 31.554008] BUG: Bad rss-counter state mm:0000000079ebb4c1 type:MM_ANONPAGES val:22 [ 32.015721] BUG: Bad rss-counter state mm:000000002ecdb3a2 type:MM_FILEPAGES val:33 [ 32.016701] BUG: Bad rss-counter state mm:000000002ecdb3a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1915' (ECDSA) to the list of known hosts. 2023/06/20 18:44:34 fuzzer started 2023/06/20 18:44:35 dialing manager at localhost:36067 2023/06/20 18:44:35 checking machine... 2023/06/20 18:44:35 checking revisions... [ 32.735463] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:44:35 testing simple program... [ 32.784770] cgroup: Unknown subsys name 'net' [ 32.836878] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:44:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff816cb50a RDX=0000000000006cb5 RSI=0000000000006cb5 RDI=ffffffff86504cc4 RBP=ffff888018e472e8 RSP=ffff888018e47220 R8 =0000000000000000 R9 =ffff888018e472d0 R10=0000000000038001 R11=0000000000020d03 R12=ffff888018e472f0 R13=ffff888018e472d8 R14=ffff888018e472d1 R15=ffff888018e47290 RIP=ffffffff8113077a RFL=00000213 [----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 00007f33bff1f900 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=00007f33c04d6618 CR3=000000000e5ee000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f0db150a520 CR3=0000000013a48000 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=11593b9ccddaac8fae422cd2d21d3bc6 XMM02=2c67c8bc2e329bc3000000000011a808 XMM03=fb795ef6d65770560000000000122010 XMM04=a0646be913f7582b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131eb0 XMM06=c291bd5c70af25b90000000000131d38 XMM07=e042d86d42eb936e0000000000122290 XMM08=7ba5037d7262a707000000000011a868 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000